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(senior) developer fullstack (typescript / javascript / node.js) Jobs in Berlin

fullstack engineer

Kayzen

<div><h3 class="jobSectionHeader"><b>Fullstack Engineer (m/f/d)</b></h3>
<p><b>
Berlin, Bangalore, Remote</b></p>
<p>
Hello I am Servesh, Co- founder and CTO at Kayzen, and I am now looking for a Fullstack Engineer to join our Console team. But wait, you have not heard of Kayzen before?</p>
<p>
Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the world's best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.</p>
<p><b>
The Team</b></p>
<p>
The Console team owns the user-facing applications and interfaces that power the Kayzen platform &mdash; from our self-serve campaign management dashboard and real-time reporting suite to internal tooling used by our managed service teams. We work closely with product managers, designers, backend engineers, and data teams to deliver seamless, high-performance experiences. We are responsible for some of the most impactful work at Kayzen, including:</p>
<ul>
<li>&quot;The Console&quot; which is the face of Kayzen we are very proud of.</li>
<li>Complex features which surface a lot of backend infrastructure via console</li>
<li>Almost 100% uptime with very well planned &amp; executed project management</li>
</ul>
<p><i>Sounds interesting. Isn't it?</i></p>
<p><b>
About the Role</b></p>
<p>
We are looking for a coding-first <b>Fullstack Engineer</b> who thrives on turning complex product requirements into high-performance UIs. You should be comfortable working across the stack, contributing to architecture discussions, and be an early adopter of AI-assisted engineering (e.g., Claude Code, Cursor, Copilot) in your daily coding workflow. This role is a strong individual contributor position with room to grow into deeper technical ownership over time.</p>
<p><b>
Responsibilities</b></p>
<ul>
<li>Core responsibilities</li>
<li><ul><li>Design, build, and maintain high-quality features across the Fullstack stack, from UI to API integration</li>
<li>Write clean, well-tested, production-ready code and actively participate in code reviews</li>
<li>Collaborate closely with Product, Design, QA, and Backend teams to deliver cohesive, user-centric features</li>
<li>Contribute to technical decisions around architecture, tooling, and best practices within the team</li>
<li>Take ownership of features end to end, from planning through deployment and monitoring</li>
</ul></li><li>Hands-on AI Implementation</li>
<li><ul><li>Integrate AI-powered coding agents and automated LLM-based testing into your daily development cycle</li>
<li>Contribute to building 'AI-First' UI patterns, working alongside the LLM Platform team on generative, prompt-driven interfaces</li>
<li>Stay current with emerging AI-assisted development tools and bring relevant ones back to the team</li>
</ul></li><li>Project &amp; Execution Management</li>
<li><ul><li>Break down assigned product requirements into clear, actionable engineering tasks</li>
<li>Deliver work reliably within sprint commitments, flagging blockers or scope changes early</li>
<li>Balance new feature delivery with addressing technical debt in the codebase you work on</li>
</ul></li>
</ul><p><b>Requirements</b></p>
<h4 class="jobSectionHeader"><b>
Fullstack Technical Excellence (Core Focus)</b></h4>
<ul><li>5+ years of professional Fullstack development experience with modern JavaScript/TypeScript</li>
<li>Solid expertise in at least one major framework (React, Angular, or Vue) and its ecosystem</li>
<li>Strong understanding of HTML5, CSS3, responsive design, and cross-browser compatibility</li>
<li>Experience building data-heavy UIs, ideally including real-time data visualization</li>
<li>Good grasp of Fullstack performance optimization, including bundle size, rendering, lazy loading, and caching strategies</li>
<li>Experience with state management patterns (Redux, MobX, Zustand, or similar)</li>
<li>Working knowledge of Fullstack testing methodologies, unit, integration, and end-to-end (Jest, Cypress, Playwright, or similar)</li>
<li>Comfortable working with design systems and shared component libraries</li>
<li>Experience using AI-assisted development tools (e.g., Claude Code) to boost engineering productivity</li>
</ul><h4 class="jobSectionHeader"><b>Engineering Maturity</b></h4>
<ul><li>Experience contributing to Fullstack architecture decisions on production applications</li>
<li>Solid understanding of APIs, RESTful services, GraphQL, and system design fundamentals</li>
<li>Ability to give and receive constructive feedback through code reviews</li>
<li>Good communication skills, able to explain technical decisions clearly to teammates and stakeholders</li>
</ul><h4 class="jobSectionHeader"><b>Startup Mindset</b></h4>
<ul><li>Bias for shipping and iteration, you deliver incrementally and learn from real users</li>
<li>Comfortable with ambiguity and rapid change in a fast-paced environment</li>
<li>Thinking in terms of leverage and reuse, not one-off solutions</li>
<li>Pragmatic about trade-offs between perfectionism and speed of delivery</li>
</ul><h4 class="jobSectionHeader"><b>Less About</b></h4>
<ul><li>Developers who prefer working in isolation on narrowly scoped tickets without engaging with the wider product context. We need someone who wants to understand the &quot;why&quot; behind the work and contribute ideas, not just execute tasks.</li>
</ul><h4 class="jobSectionHeader"><b>Nice to Have</b></h4>
<ul><li>Familiarity with ad-tech, real-time bidding platforms, or high-traffic data products</li>
<li>Contributions to open-source Fullstack projects or community involvement</li>
<li>Experience building Fullstack interfaces for AI/ML-powered products (e.g., chatbots, recommendation engines, AI-generated content displays)</li>
<li>Familiarity with LLM APIs and prompt-driven UI patterns</li>
</ul>
<p><b>What do we offer?</b></p>
<ul>
<li>Exceptional career growth and learning opportunity</li>
<li>A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market</li>
<li>A fun, driven, and multinational team located across Germany, India, UK, Argentina, Ukraine, Turkey, Spain and many more countries</li>
<li>A flexible work-from-home arrangement</li>
<li>A 500-dollar home-office setup budget</li>
<li>A 1000-dollar annual learning and development budget</li></ul></div>

Fullstack Engineer (m/f/d)

Ströer SE & Co. KGaA

<div><div><div>Gehalt:
</div><div><div><ul><li> Berlin</li></ul>
<ul><li> Berufserfahrene</li></ul>
<ul><li> Software Engineering</li></ul></div></div></div></div><p></p>
<br><div><div>Unternehmensbeschreibung</div><br>
<br>
<p>M&ouml;chtest Du digitale L&ouml;sungen entwickeln, die den Journalismus auf das n&auml;chste Level bringen? In der Str&ouml;er Content Group Product &amp; Tech arbeiten &uuml;ber 150 Expert:innen an innovativen Konzepten.</p>
<p>Unser Herzst&uuml;ck ist t-online.de, Deutschlands f&uuml;hrende Nachrichten- und Ratgeberplattform. Mit einem einzigartigen Multiscreen-Konzept erreicht t-online Millionen Nutzer:innen &uuml;ber alle digitalen Kan&auml;le und setzt auf multimediales Storytelling, das sich an aktuellen Trends und Nutzer:innenverhalten orientiert.</p>
<p>Unsere Verticals wie Giga.de und kino.de erg&auml;nzen unser Angebot f&uuml;r die Generation Y. Wir schaffen Premium-Inhalte, die von Digital Natives konsumiert werden.</p>
<p>Denkst Du kreativ und m&ouml;chtest deine Ideen einbringen? Gestalte mit uns die Zukunft des digitalen Publishings!</p>
<p>In dieser Rolle entwickelst Du Anwendungen und Workflows, die unsere Redaktion bei der Erstellung, Bearbeitung und Ver&ouml;ffentlichung von Content unterst&uuml;tzen und echten Einfluss auf journalistische und redaktionelle Arbeit haben. Ein besonderer Fokus liegt dabei auf der Transformation redaktioneller Prozesse durch den Einsatz von AI und Agentic Engineering.
<br>
<br>
Wir suchen einen <b>Senior Fullstack Engineer (m/w/d)</b> mit starker Frontend-Expertise, technischem Gesamtverst&auml;ndnis und Lust darauf, Verantwortung f&uuml;r produktive Anwendungen zu &uuml;bernehmen &ndash; von der Idee &uuml;ber die Entwicklung bis zum stabilen Betrieb.</p><br>
<br>
<div>Stellenbeschreibung</div><br>
<br>
<ul><li>Du entwickelst moderne Web-Anwendungen f&uuml;r redaktionelle Produkte und unterst&uuml;tzt damit unsere Teams bei der effizienten Erstellung und Ver&ouml;ffentlichung von Content</li>
<li>Du gestaltest und implementierst AI-gest&uuml;tzte Workflows, die redaktionelle Prozesse vereinfachen, automatisieren und qualitativ verbessern</li>
<li>Du bringst Deine Erfahrung im Bereich Agentic Engineering ein und hilfst dabei, neue Ans&auml;tze f&uuml;r AI-basierte Produktentwicklung in die Praxis zu &uuml;bertragen</li>
<li>Du arbeitest mit Technologien wie JavaScript, TypeScript sowie mit modernen Frameworks wie Vue, React oder Angular</li>
<li>Du arbeitest eng mit Produkt, Redaktion, UX/UI und weiteren technischen Teams zusammen, um nutzerzentrierte und skalierbare L&ouml;sungen zu entwickeln</li>
<li>Du &uuml;bernimmst Ownership f&uuml;r Anwendungen und Features &ndash; von der technischen Konzeption &uuml;ber die Umsetzung bis zum Betrieb</li><br>
</ul><br>
<div>Qualifikationen</div><br>
<br>
<ul><li>Du verf&uuml;gst &uuml;ber sehr gute Kenntnisse in JavaScript, TypeScript sowie in einem modernen Frontend-Framework wie React, Vue oder Angular</li>
<li>Du hast Erfahrung in der Entwicklung produktiver Web-Anwendungen mit Fokus auf Wartbarkeit, Performance und User Experience</li>
<li>Du bringst erste Erfahrungen mit Agentic Engineering, AI-gest&uuml;tzten Entwicklungsprozessen oder der Integration von AI-Funktionalit&auml;ten in Softwareprodukte mit</li>
<li>Du kennst Public-Cloud-Plattformen wie AWS oder Google Cloud Platform und nutzt diese sicher in Entwicklungsprojekten</li>
<li>Du begeisterst Dich daf&uuml;r Produkte zu bauen, technische Herausforderungen zu l&ouml;sen und gemeinsam im Team Wirkung zu erzielen</li>
<li>bist offen f&uuml;r neue Technologien und zeichnest Dich durch pragmatisches Denken aus</li><br>
</ul><br>
<div>Zus&auml;tzliche Informationen</div><br>
<br>
<ul><li>Feelgood: Ob frisches Obst &amp; M&uuml;sli zum gemeinsamen Fr&uuml;hst&uuml;ck mit Blick auf die Speicherstadt am Standort Hamburg, Recreation Rooms in Frankfurt/Main &amp; M&uuml;nchen, Lounge mit Playstation in Berlin - jeder Standort hat seinen eigenen Charme</li>
<li>Flexibility: Keine Lust auf Rush Hour? Bei uns hast Du die M&ouml;glichkeit auch aus dem Home Office zu arbeiten</li>
<li>Community: Wir &uuml;bernehmen Verantwortung und sorgen f&uuml;r mehr Nachhaltigkeit und Diversit&auml;t am Arbeitsplatz &ndash; engagiere Dich z.B. in unserer Nachhaltigkeitswerkstatt oder werde Mitglied in einer unserer Communities wie LGBTQ+ oder unserem Frauennetzwerk</li>
<li>Company: Sie oder Du? Bei uns findest Du ein kommunikatives und respektvolles Miteinander per &bdquo;Du&ldquo;, das durch eine offene Kultur gepr&auml;gt ist. Als Konzern legen wir besonderen Wert auf die berufliche Gleichstellung unserer Mitarbeiter:innen</li>
<li>Learn &amp; Grow: Gestaltungsspielraum f&uuml;r Deine kreativen Ideen sowie fachliche und pers&ouml;nliche Weiterentwicklungsm&ouml;glichkeiten, z.B. in unserem internen Talenteprogramm, zeichnen die bunte Str&ouml;er-Welt aus
</li><li>On Top: Profitiere durch unsere Benefits und nutze die M&ouml;glichkeit eines bezuschussten Mittagessens oder lease Dir verg&uuml;nstigt ein Fahrrad und genie&szlig;e exklusive Rabatte in vielen Shops</li></ul></div>

Senior Fullstack Engineer (m/w/d)

Trusted Shops

<div>
 <strong>
  About Trusted Shops
  <br/>
  <br/>
 </strong>
 Trusted Shops creates digital trust between people, businesses, and AI agents. Every day, millions of consumers rely on our solutions to make confident online decisions, while businesses use our products to build trust, strengthen customer relationships, and grow sustainably.
 <br/>
 <br/>
 With around 700 colleagues across Europe, more than 25,000 online shops, and over 40 million consumers in our Community of Trust, we are helping shape a safer and more transparent digital world. But trust is not only at the heart of our products &ndash; it also shapes how we work together. We believe in collaboration, ownership, and the freedom to do your best work through a flexible hybrid work culture.
 <br/>
 <br/>
 Join us and help create a digital world where trust, transparency, and meaningful connections drive every interaction.
 <br/>
 <br/>
 To strengthen our Product &amp; Engineering Unit within the Solution Design Team, we are looking for a
 <br/>
 <br/>
 <strong>
  Fullstack Engineer &ndash; Frontend Focus (React &amp; TypeScript) (m/f/d)
  <br/>
  <br/>
 </strong>
 (Hybrid in Cologne or remote in Berlin | Full-time | Permanent Contract)
 <br/>
 <br/>
 <strong>
  Your Responsibilities
  <br/>
  <br/>
 </strong>
 <ul>
  <li>
   Build and maintain modern frontend applications using React and TypeScript
  </li>
  <li>
   Create intuitive, accessible, and high-performance user experiences for custom features and products used by our large and enterprise customers
  </li>
  <li>
   Collaborate closely with Sales Consultants, other full-stack engineers, and cross-functional product teams
  </li>
  <li>
   Deliver new features from concept and implementation to production rollout
  </li>
  <li>
   Improve application performance, code quality, testing, and maintainability
  </li>
  <li>
   Contribute to frontend architecture decisions, engineering standards, and best practices
   <br/>
   <br/>
   <br/>
  </li>
 </ul>
 <strong>
  Your Profile
  <br/>
  <br/>
 </strong>
 <ul>
  <li>
   Degree in Computer Science, Software Engineering, Media Informatics, or a comparable field; equivalent practical experience is equally welcome
  </li>
  <li>
   At least two years of professional experience developing modern web applications with React and TypeScript
  </li>
  <li>
   Strong knowledge of JavaScript, HTML, and CSS, with a focus on building scalable and maintainable frontend solutions
  </li>
  <li>
   Experience integrating APIs and collaborating with backend services in distributed systems , preferably Node.js or Java based or the willingness to learn
  </li>
  <li>
   Familiarity with Git, GitHub, and modern CI/CD workflows
  </li>
  <li>
   A collaborative mindset, strong problem-solving skills, and professional proficiency in English; German language skills are a plus
   <br/>
   <br/>
   <br/>
  </li>
 </ul>
 <strong>
  Our Tech Stack
  <br/>
  <br/>
 </strong>
 While your primary focus will be React and TypeScript, you'll work in an environment that includes:
 <br/>
 <br/>
 <ul>
  <li>
   Frontend: React, TypeScript
  </li>
  <li>
   Backend: Node.js, Java, Spring Boot, Python
  </li>
  <li>
   Cloud &amp; Infrastructure: AWS, Lambda, S3, DynamoDB, Terraform
  </li>
  <li>
   Databases: DynamoDB, PostgreSQL
  </li>
  <li>
   Developer Experience: GitHub, CircleCI, CI/CD, Infrastructure as Code
   <br/>
   <br/>
   <br/>
  </li>
 </ul>
 <strong>
  What We Offer
  <br/>
  <br/>
 </strong>
 <ul>
  <li>
   Hybrid work: Flexible remote work combined with team time in the office
  </li>
  <li>
   Workation: Temporarily work from within the EU, Iceland, Liechtenstein, or Norway
  </li>
  <li>
   Permanent contract with Europe&rsquo;s trusted brand
  </li>
  <li>
   One &ldquo;Self Education Day&rdquo; per month
  </li>
  <li>
   27 vacation days + 3.5 additional days off (Christmas, New Year&rsquo;s Eve, Carnival)
  </li>
  <li>
   Buddy programme &amp; structured onboarding
  </li>
  <li>
   Individual training and development opportunities
  </li>
  <li>
   Regular team, unit and company events
  </li>
  <li>
   Health Pass (free online and offline sports, fitness, and health courses)
   <br/>
   <br/>
   <br/>
  </li>
 </ul>
 <strong>
  BUILD A COMMUNITY OF TRUST WITH US &ndash; #cometotrust
  <br/>
  <br/>
 </strong>
 Not sure if you meet every requirement? We'd still love to hear from you.
 <br/>
 <br/>
 At Trusted Shops, we value people for who they are. We welcome applications from all qualified candidates regardless of gender, nationality, ethnic or social background, religion or belief, disability, age, sexual orientation, or identity. We are committed to diversity, equity, and inclusion and actively oppose discrimination in all its forms.
 <br/>
 <br/>
 <strong>
  Extra Important Note:
 </strong>
 You don't need to know every technology in our stack. If you're excited about building exceptional user experiences with React and TypeScript and enjoy working in collaborative product teams, we'd love to meet you.
 <br/>
 <br/>
 Translation Career Page: English
</div>


Fullstack Engineer – Frontend Focus (React & TypeScript) (m/f/d)

Cortea AI

<div><h1 class="jobSectionHeader"><b>About us</b></h1><p>
We&rsquo;re <b>Cortea</b>, a Berlin startup <b>transforming audits with AI</b>. Manual, document-heavy audits waste expert time while demand keeps rising. Our <b>AI-powered software and specialized AI agents</b> remove the repetitive work so auditors can focus on judgment.
</p><p>Backed by top-tier VCs with &gt;15m funding, with a working product and paying customers, we&rsquo;re rapidly scaling.</p><p>
We value <b>first-principles thinking, speed, trust, and kindness</b>. We build side by side <b>in our Berlin office</b>.</p><p></p><h2 class="jobSectionHeader"><b>
Your Role</b></h2><p>
We're looking for an <b>experienced engineer who's happy anywhere in the stack</b> and turns complex audit workflows into product auditors rely on every day. You pick up whatever a problem needs, from the data model to the interface to the agents behind it.</p><p>
A lot of what we build has no reference implementation. You're <b>comfortable wading into something nobody has solved yet</b> and shipping a first version that actually works.</p><p>
Our engineering team is a <b>small, flat group of builders</b>: strong ICs who open a laptop when they see a problem instead of scheduling a meeting. Everyone owns real product and architecture decisions, and that's exactly what we want more of.</p><p></p><h2 class="jobSectionHeader"><b>
What you'll do</b></h2><ul><li><p>
Build the interfaces auditors work in, partnering with design to turn complex flows into something that feels effortless</p></li><li><p>
Build and improve the agents at the core of the product, plus the harnesses and eval pipelines around them</p></li><li><p>
Make the long-running workflows behind the product reliable and debuggable, so failures surface fast instead of silently</p></li><li><p>
Use AI heavily in your own workflow to move faster, without ever shipping output you can't stand behind</p></li><li><p>
Drive the how in RFCs and technical discussions with other engineers, and partner with product on the what</p></li></ul><p></p><h2 class="jobSectionHeader"><b>
Qualifications</b></h2><p>
You'll fit here if you:</p><ul><li><p>
Have 5+ years shipping production web applications across the stack</p></li><li><p>
Write production APIs and model the data behind them so it holds up under multi-tenancy and load</p></li><li><p>
Are strong on the frontend and can build genuinely complex UI</p></li><li><p>
Get how LLM agents actually work: agents, harnesses, tool use, and measuring quality with evals</p></li><li><p>
Keep up with where AI is moving and bring the latest tools into how you work to make yourself faster</p></li><li><p>
Bring a strong product mindset and real ownership of outcomes</p></li><li><p>
Make architectural decisions, weigh trade-offs, and build things other engineers can extend</p></li><li><p>
Are comfortable with ambiguity and work things out from fundamentals when there's no established answer</p></li></ul><p>
Nice-to-haves that are a plus:</p><ul><li><p>
Hands-on experience building agents, harnesses, or eval pipelines</p></li><li><p>
Data-dense or workflow-heavy B2B products</p></li><li><p>
Scaling multi-tenant systems as data and traffic grow</p></li><li><p>
Audit, finance, compliance, or another domain where being wrong is expensive</p></li><li><p>
Early-stage startup or fast-moving engineering environment</p></li></ul><p><b>
No one checks every box. If you ship across frontend, backend, and data and own what you build, let's talk.</b></p><p></p><h2 class="jobSectionHeader"><b>
Our tech</b></h2><ul><li><p>
React, TS, Tailwind, TanStack</p></li><li><p>
Python, Postgres, Temporal, Kafka, Redis</p></li><li><p>
GCP, Azure, k8s</p></li><li><p>
GitHub, Linear, Slack, Notion</p></li></ul><p></p><h1 class="jobSectionHeader"><b>
What We Offer</b></h1><ul><li><p><b>
High impact &amp; growth:</b> Front-row seat to scaling an AI startup with real ownership from day one</p></li><li><p><b>
Mission-driven culture:</b> First-principles thinking, bold ideas, and a supportive team</p></li><li><p><b>
Attractive compensation:</b> competitive salary + meaningful equity</p></li><li><p><b>
Personal development:</b> Learning budget for courses and conferences</p></li><li><p><b>
True Berlin startup environment:</b> Central Berlin office, team lunches, retreats, flexible vacation</p></li></ul><p></p><h1 class="jobSectionHeader"><b>
Interview process</b></h1><ul><li><p><b>
First Call</b> &mdash; Intro to Cortea with our Founders Associate Liza</p></li><li><p><b>
Second Call</b> &mdash; Technical interview with our Member of Technical Staff Jendrik</p></li><li><p><b>
Third Call</b> &mdash; Deep dive into our culture with our Co-Founder Philipp</p></li><li><p><b>
On-site Half-Day (Berlin) </b>&mdash; Meet the team and work on a real problem together</p></li></ul></div><div></div>

Senior/Staff Fullstack Engineer (m/f/x)

Scalable

<div><b>Company Description</b><p><br>
Scalable Capital is a leading digital investment and banking platform with a full banking licence, empowering people across Europe to shape their own finances. Scalable Broker makes it easy and affordable for clients to invest professionally in stocks, ETFs, cryptocurrencies, and derivatives, as well as set up savings plans. Scalable Wealth, the digital wealth management service, offers clients professional investment in ETF portfolios, and is also adopted as a white-label solution by banks and other B2B partners. The company&rsquo;s offerings are rounded off by attractive interest rates, loans, and private equity. With the European Investor Exchange, Scalable Capital offers an exchange specifically for retail investors. Over one million clients have already entrusted more than &euro;30 billion to the platform.<br>
<br>
Founded in 2014, Scalable Capital now employs over 700 people across Munich, Berlin, Vienna, Milan, and London. Together with the founding and management team, including Erik Podzuweit and Florian Prucker, they are working on a new generation of financial services.</p><p>
Visit our finance blog or check out our Social Media channels to find out what our Expert Teams have to say.<br>
<br>
Our Company Values guide us every day in how we work and collaborate. To learn more about them, you can find our values here (English).</p><b><br>
Job Description</b><p><br>
You will join the Client Technology Tribe and become part of our Client Success Platform team.</p><p>
The team&rsquo;s mission is: to provide the technology for an outstanding customer support experience to millions of Scalable clients. Our foremost strategy is to proactively prevent support cases where feasible by empowering our clients to find solutions independently. We also provide tools and analytics that enable everyone within Scalable to effectively minimise support cases in their areas of expertise.</p><p>
In this role, you will work on client-facing support journeys as well as internal platforms and services. You will help build and improve support workflows, document and case handling, chatbot and capability integrations, and the technical foundations needed to operate these systems securely and reliably in a regulated environment.</p><p>
A big part of this role requires a strong product mindset: you will move fast to ship high-impact, client-facing experiences while maintaining a rigorous platform standard. Instead of choosing between quick one-off fixes or endless over-engineering, you will strike the right balance delivering immediate value to our Customers while designing the reusable capabilities, extensible workflows, and robust integration patterns that ensure long-term architectural quality.</p><p>
AI is a core part of how we work and what we build: from internal engineering workflows to support automation and new client-facing capabilities, you will work hands-on with modern AI tooling and help deliver AI-powered features with real impact.</p><p>
You will collaborate closely with Product, Operations, Support, Design, Data Science, and other engineering teams to deliver measurable improvements in support quality, case prevention, deflection, and operational efficiency.</p><p><b>
Your Responsibilities</b></p><ul><li>
Build and improve high-quality client-facing experiences and internal tooling that support self-service, case prevention, and efficient support operations.</li><li>
Work across the stack on frontend applications, backend services, APIs, integrations, event-driven workflows, and cloud infrastructure.</li><li>
Design and implement scalable solutions for support workflows, document handling, automation, and cross-service orchestration.</li><li>
Partner closely with Product, Operations, Support, and other engineering teams to deliver solutions with clear business and client impact.</li><li>
Contribute to observability, analytics, experimentation where relevant, and operational excellence across support-related systems.</li><li>
Write clean, testable, maintainable, and well-documented code while treating security, privacy, and reliability as first-class concerns.</li><li>
Take ownership from idea to production, helping the team ship pragmatic solutions without compromising engineering quality.</li><li>
Contribute to continuous improvement in architecture, testing, monitoring, and developer experience.</li><li>
Help shape technical direction, mentor teammates, and raise the engineering bar within the team.</li></ul><br>
<b>
Qualifications</b><br>
<ul><li>
A university degree in Computer Science, Engineering, or a related field, or comparable practical experience.</li><li>
Strong hands-on experience with TypeScript, React, Next.js and NestJS, building polished, production-grade customer-facing applications across frontend and backend systems.</li><li>
Solid frontend experience with modern web application development.</li><li>
Practical backend experience building and integrating production services experience with Java and/or Kotlin is a plus.</li><li>
Good understanding of REST APIs, GraphQL, authentication and authorisation patterns including JWT, and service-to-service integrations.</li><li>
Experience working with distributed systems, asynchronous workflows, queues, or event-driven architectures is a strong plus.</li><li>
Good working knowledge of AWS, Docker, Git, CI/CD, and observability/debugging in production.</li><li>
Experience delivering complex software with end-to-end ownership, ideally across internal tooling, platforms, or customer-facing products.</li><li>
Strong analytical thinking in both technical and product contexts, with the ability to make pragmatic trade-offs.</li><li>
Clear, open, and concise communication skills, with professional fluency in English.</li><li>
Experience in regulated environments, support tooling, workflow automation, or operationally critical systems</li></ul><br>
<b>
Additional Information</b><br>
<ul><li>
Be part of one of the fastest-growing and most visible Fintech startups in Europe, creating innovative services that have a substantial impact on the lives of our customers</li><li>
Work with an international, diverse, inclusive, and ever-growing team that loves creating the best products for our clients</li><li>
Be productive with the latest hardware and tools</li><li>
Learn and grow by joining our in-house knowledge sharing or career development sessions and spending your individual Education Budget</li><li>
Learn and experience German culture first hand by joining our free German language classes</li><li>
International relocation support is provided if required</li><li>
Opportunity to work from abroad</li><li>
Benefit from an attractive compensation package and from the company pension scheme</li><li>
Monthly contribution of 50% for the &lsquo;Deutschland Jobticket&rsquo;</li><li>
Say goodbye to order commissions and say hello to your complimentary subscription of Scalable Capital's PRIME+ Broker</li><li>
Enjoy flexible and discounted sports activities with Urban Sports Club</li></ul></div>

(Senior) Fullstack Engineer (TypeScript) - Client Success Platform (m/f/x)

CHECK24 Vergleichsportal

<div><h2 class="jobSectionHeader"><b>Im &Uuml;berblick</b></h2>
 <div><div>Junior
 </div><div>Vollzeit
 </div><div>Festanstellung</div></div></div>
<br><div><div><h2 class="jobSectionHeader"><b>&Uuml;ber diesen Job</b></h2>
<p>You want to do more than just write code &ndash; you want to actively improve systems and translate business processes into software? Then join our team and help shape the future of our platform!</p>
<p>Here, you will work with modern technologies such as PHP, Symfony, React, and Docker. Your focus will be on <b>backend development</b> (approx. 70 %), while still contributing to frontend development (approx. 30 %). In a motivated team, you will take on responsibility from day one, bring in your own ideas, and ensure clean, well-documented code.</p>
<p>What are you waiting for? We look forward to receiving your application!</p>
</div>
<div><h2 class="jobSectionHeader"><b>Was Du mitbringst</b></h2>
<ul><li>Completed studies in Computer Science or a related field (or currently finishing your thesis)</li>
<li>Strong foundation in <b>software development </b>and initial hands-on experience with React or Symfony</li>
<li>Excellent knowledge of <b>Linux</b> systems and the command line</li>
<li>Experience with <b>Docker and GitHub</b>, ideally demonstrated through own project (beyond university assignments)</li>
<li>Good English skills (spoken and written)</li>
</ul></div><div><h2 class="jobSectionHeader"><b>Zu Deinen Aufgaben z&auml;hlen</b></h2>
<ul><li>Use tools such as <b>Docker, and GitHub </b>in the development and deployment process</li>
<li>Work with modern frameworks and technologies such as <b>PHP, Symfony, React, and TypeScript</b></li>
<li>Bring in your own ideas and suggest concrete improvements to our systems</li>
<li>Integrate diverse business processes into robust, scalable software solutions</li>
<li>Focus on <b>backend development (approx. 70 %) </b>while supporting frontend tasks (approx. 30 %)</li>
</ul></div><div><h2 class="jobSectionHeader"><b>Was wir Dir bieten</b></h2>
<ul><li><b>Top career entry </b>&ndash; be part of a new project from day one and work on challenging and varied tasks where you take on responsibility right from the start</li>
<li><b>Long-term perspective</b> &ndash; thanks to our continuous growth, we can offer you a permanent position with us if you deliver excellent performance</li>
<li><b>Ownership for your topics</b> &ndash; we give you plenty of room for initiative. Actively contribute your ideas and directly influence the success of CHECK24!</li>
<li><b>Events &amp; team spirit</b> &ndash; we live team spirit both at work and beyond &ndash; whether at lunch, table soccer, or after-work events &ndash; and we celebrate our successes together at regular company and team events</li>
<li><b>Flexible working hours </b>&ndash; as a working student, you can arrange your working hours flexibly to fit around your studies</li>
<li><b>Shared lunches</b> &ndash; enjoy free lunch on Mondays, Tuesdays, and Thursdays</li>
<li><b>Health &amp; fitness</b> &ndash; subsidy for external sports oWers (e.g., EGYM Wellpass) as well as yoga and crossfit classes</li>
<li><b>Perfect accessibility </b>&ndash; centrally located oWice in Berlin-Mitte at Spittelmarkt with excellent transport connections</li></ul></div></div>
<br><b>Kontakt</b>
<br>Muriel Langen Martinez
 muriel.langen@check24.de
Bitte sende uns Bewerbungen ausschlie&szlig;lich online &uuml;ber unser Bewerbungsformular.

(Junior) Fullstack Engineer (m/f/d) for a new product

CHECK24 Vergleichsportal GmbH

<div>
 <strong>
  &Uuml;ber diesen Job
  <br/>
  <br/>
 </strong>
 You want to do more than just write code &ndash; you want to actively improve systems and translate business processes into software? Then join our team and help shape the future of our platform!
 <br/>
 <br/>
 Here, you will work with modern technologies such as PHP, Symfony, React, and Docker. Your focus will be on
 <strong>
  backend development
 </strong>
 (approx. 70 %), while still contributing to frontend development (approx. 30 %). In a motivated team, you will take on responsibility from day one, bring in your own ideas, and ensure clean, well-documented code.
 <br/>
 <br/>
 What are you waiting for? We look forward to receiving your application!
 <br/>
 <br/>
 <strong>
  Was Du mitbringst
  <br/>
  <br/>
 </strong>
 <ul>
  <li>
   Completed studies in Computer Science or a related field (or currently finishing your thesis)
  </li>
  <li>
   Strong foundation in software development and initial hands-on experience with React or Symfony
  </li>
  <li>
   Excellent knowledge of Linux systems and the command line
  </li>
  <li>
   Experience with Docker and GitHub, ideally demonstrated through own project (beyond university assignments)
  </li>
  <li>
   Good English skills (spoken and written)
   <br/>
   <br/>
  </li>
 </ul>
 <strong>
  Zu Deinen Aufgaben z&auml;hlen
  <br/>
  <br/>
 </strong>
 <ul>
  <li>
   Use tools such as Docker, and GitHub in the development and deployment process
  </li>
  <li>
   Work with modern frameworks and technologies such as PHP, Symfony, React, and TypeScript
  </li>
  <li>
   Bring in your own ideas and suggest concrete improvements to our systems
  </li>
  <li>
   Integrate diverse business processes into robust, scalable software solutions
  </li>
  <li>
   Focus on backend development (approx. 70 %) while supporting frontend tasks (approx. 30 %)
   <br/>
   <br/>
  </li>
 </ul>
 <strong>
  Was wir Dir bieten
  <br/>
  <br/>
 </strong>
 <ul>
  <li>
   Top career entry &ndash; be part of a new project from day one and work on challenging and varied tasks where you take on responsibility right from the start
  </li>
  <li>
   Long-term perspective &ndash; thanks to our continuous growth, we can offer you a permanent position with us if you deliver excellent performance
  </li>
  <li>
   Ownership for your topics &ndash; we give you plenty of room for initiative. Actively contribute your ideas and directly influence the success of CHECK24!
  </li>
  <li>
   Events &amp; team spirit &ndash; we live team spirit both at work and beyond &ndash; whether at lunch, table soccer, or after-work events &ndash; and we celebrate our successes together at regular company and team events
  </li>
  <li>
   Flexible working hours &ndash; as a working student, you can arrange your working hours flexibly to fit around your studies
  </li>
  <li>
   Shared lunches &ndash; enjoy free lunch on Mondays, Tuesdays, and Thursdays
  </li>
  <li>
   Health &amp; fitness &ndash; subsidy for external sports oWers (e.g., EGYM Wellpass) as well as yoga and crossfit classes
  </li>
  <li>
   Perfect accessibility &ndash; centrally located oWice in Berlin-Mitte at Spittelmarkt with excellent transport connections
  </li>
 </ul>
</div>


Explore 99+ Fullstack engineer in Berlin this July. Find roles across top companies and apply now to boost your career.

99 fullstack engineer jobs In Berlin

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(Senior) Fullstack Engineer (TypeScript) - Client Success Platform (m/f/x)

(Junior) Fullstack Engineer (m/f/d) for a new product

(Junior) Fullstack Engineer (m/f/d) for a new product