kotlin developer

Energie Data Services Nederland (EDSN) B.V.

<div>
 Energiemarkt | 32-40 uur | Amersfoort / Hybride | v/m/x | &euro;43.000-&euro;70.000 per jaar inclusief 8% vakantiegeld + mobiliteitsbudget of leaseauto.
 
 
 
 
 Als medior Kotlin developer bouw je mee aan innovatieve software die de energietransitie vooruitbrengt
 
 
 
 
 In jouw rol als Kotlin Developer lever je een directe bijdrage aan een goed werkende energiemarkt in Nederland. Jij ontwikkelt en verbetert systemen die ervoor zorgen dat energiedata veilig en betrouwbaar beschikbaar is voor alle netbeheerders.
 
 
 
 Zo werk je als Kotlin Developer vol energie
 
 
 
 Je ontwikkelt zelfstandig complexe backend-systemen binnen een microservices-architectuur. Je draagt bij aan de optimalisatie van CI/CD-processen door middel van automatisering en monitoring. Je adviseert teamleden en stakeholders over technische oplossingen en implementeert schaalbare systemen. Daarnaast deel je actief kennis via code-reviews, documentatie en interne trainingen. Je ondersteunt junior collega&rsquo;s en helpt hen groeien in hun rol. Je komt te werken in &eacute;&eacute;n van onze multidisciplinaire teams. Hoe die teams eruit zien lees je
 
 hier
 
 .
 
 
 
 Hier krijg jij als Kotlin Developer energie van
 
 
 
 <ul>
 <li>
 Je krijgt energie van het ontwikkelen en verbeteren van van backend-functionaliteiten binnen een moderne Kotlin-stack
 </li>
 <li>
 Je vindt het leuk om te werken met Kotlin, Spring Boot en CI/CD-tooling
 </li>
 <li>
 Je wordt blij van het oplossen van technische vraagstukken en het bouwen van schaalbare oplossingen
 </li>
 <li>
 Je werkt graag samen met collega&rsquo;s en stakeholders aan slimme technische keuzes
 </li>
 <li>
 Je deelt graag kennis via code reviews, documentatie of interne sessies
 </li>
 <li>
 Je vindt het leuk om junior collega&rsquo;s te helpen groeien
 
 
 </li>
 </ul>
 
 Onze energiedrijvers
 
 
 
 <ul>
 <li>
 Bruto maandsalaris tussen &euro;3.580 en &euro;5.450
 </li>
 <li>
 6 weken vakantie per jaar
 </li>
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 80% werkgeversbijdrage in je pensioen
 </li>
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 Hybride werken: vanuit huis en ons moderne kantoor in Amersfoort
 </li>
 <li>
 Reiskostenvergoeding, NS Businesscard, leaseauto of mobiliteitsbudget
 </li>
 <li>
 Veel ruimte voor persoonlijke en professionele ontwikkeling
 
 
 </li>
 </ul>
 Benieuwd naar wat wij nog meer te bieden hebben? Kijk dan snel bij onze
 
 arbeidsvoorwaarden
 
 !
 
 
 
 Dit breng jij mee
 
 
 
 <ul>
 <li>
 Je hebt een afgeronde HBO/WO-opleiding in een relevant vakgebied of je beschikt over relevante aantoonbare werkervaring.
 </li>
 <li>
 3-6 jaar ervaring in Kotlin-ontwikkeling binnen complexe omgevingen.
 </li>
 <li>
 Uitgebreide kennis van Spring Boot, CI/CD-tools en API-ontwikkeling.
 </li>
 <li>
 Vaardigheden om zelfstandig problemen op te lossen en verbeteringen door te voeren.
 </li>
 <li>
 Bereidheid om junior collega's te begeleiden en coachen.
 
 
 </li>
 </ul>
 
 Maak kennis met je team
 
 
 
 Je werkt binnen een van onze DevOps-teams, elk verantwoordelijk voor een specifiek domein binnen de energiemarkt. Samen zorgen jullie ervoor dat onze applicaties veilig, stabiel en schaalbaar draaien. De sfeer is informeel, professioneel en gedreven: we hebben een gezamenlijke missie en helpen elkaar om steeds beter te worden.
 
 
 
 Ben jij die Kotlin Developer die ook wil werken vol energie?
 
 
 
 Reageer dan eenvoudig via de solliciteer-button! We kunnen jou op korte termijn al gebruiken bij EDSN. Heb je inhoudelijke vragen over de functie? Neem gerust contact met ons op.
 
 
 
 
 Over EDSN
 
 
 
 
 Energie Data Services Nederland (EDSN) is een groeiend bedrijf dat snel stappen zet in de professionalisering van haar organisatie. EDSN ontwikkelt voor alle regionale en landelijke netbeheerders een betrouwbare en innovatieve ICT-infrastructuur. We specialiseren ons in het verzamelen en bereikbaar maken van gebruiksdata, die andere marktpartijen weer kunnen gebruiken voor het ontwikkelen van nieuwe diensten. Met die datadiensten geven we de energietransitie en daarmee ook de verduurzaming van Nederland ruim baan.
 
 
 This position requires a high proficiency of the Dutch language, therefore only Dutch speaking candidates are considered.
 
 
</div>

Kotlin developer (medior)

Client of Xcelyst Limited

Senior Software Engineer &ndash; KotlinJob TitleSenior Software Engineer &ndash; KotlinLocationLondon, United Kingdom (Hybrid)Employment TypePermanent / Full-TimeAbout the RoleWe are looking for experienced Senior Kotlin Engineers to join a high-performing engineering team building a next-generation cloud-native platform within the Capital Markets domain. This platform supports critical front-office business processes and is used by global users operating in a fast-paced, real-time environment.You will work closely with product, engineering, and platform teams to design, build, and support highly scalable backend services while contributing to a strong engineering culture focused on quality, collaboration, and continuous improvement.Key Responsibilities<ul><li>Design, develop, and maintain backend services using Kotlin</li><li>Build scalable, resilient, and high-performance cloud-native applications</li><li>Collaborate with cross-functional teams to deliver business-critical features</li><li>Participate in architecture discussions and technical design decisions</li><li>Follow engineering best practices including automated testing, code reviews, and continuous integration</li><li>Support production systems and contribute to platform reliability and operational excellence</li><li>Drive continuous improvement through refactoring, clean code principles, and technical innovation</li><li>Work in highly collaborative engineering environments with shared ownership of solutions</li></ul>Required Skills &amp; Experience<ul><li>Strong commercial experience developing backend applications using Kotlin</li><li>Solid understanding of object-oriented design and software engineering principles</li><li>Experience building distributed systems, microservices, and event-driven architectures</li><li>Hands-on experience with cloud platforms, preferably Google Cloud Platform (GCP)</li><li>Experience with:</li><li>Kubernetes (GKE) and/or Cloud Run</li><li>Cloud SQL</li><li>Caching technologies</li><li>Logging and monitoring tools</li><li>Secure key and secrets management</li><li>Strong understanding of CI/CD pipelines and modern SDLC practices</li><li>Experience working in enterprise or regulated environments</li><li>Comfortable supporting production systems with high availability requirements</li></ul>Preferred Skills<ul><li>Experience within Capital Markets, Investment Banking, Trading, or Financial Services environments</li><li>Exposure to Agile, Extreme Programming (XP), Test-Driven Development (TDD), and continuous refactoring practices</li><li>Experience with infrastructure automation and cloud-native deployment models</li><li>Knowledge of event streaming and messaging platforms</li></ul>What We're Looking For<ul><li>Strong problem-solving and analytical skills</li><li>Passion for building high-quality software</li><li>Collaborative mindset and excellent communication skills</li><li>Ability to thrive in fast-paced, business-critical environments</li><li>Commitment to continuous learning and engineering excellence</li></ul>Benefits<ul><li>Opportunity to work on a large-scale, business-critical platform</li><li>Exposure to modern cloud-native technologies</li><li>Collaborative engineering culture</li><li>Career growth and professional development opportunities</li><li>Competitive compensation and benefits package</li></ul>If you are passionate about Kotlin, cloud-native engineering, and building scalable platforms that support critical business operations, we would love to hear from you.Pay: &pound;120,000.00-&pound;160,000.00 per yearWork Location: Hybrid remote in London

Kotlin Developer

Client Server

<div>
 
 
 
 Full Stack Developer / Engineer (Kotlin AWS JavaScript) Amsterdam to &euro;85,000
 
 
 
 
 
 
 
 Are you a skilled Full Stack Developer looking for an opportunity to progress your career whilst working with a modern tech stack and continually improving your skills?
 
 
 
 
 
 You could be joining a scaling, global FinTech company, working on a successful product that helps global companies to achieve sustainability and NetZero targets via Blockchain technology solutions.
 
 
 
 
 
 As a Full Stack Developer you will work across the full technology stack with a focus on Kotlin backend systems but also with some front end (JavaScript, Angular / React) work. You'll quickly gain an understanding of the complete ecosystem of the modern, distributed application with a broad scope of work including AWS, mobile applications, trading and transfer functionality and integration of 3rd party platforms.
 
 
 
 
 
 This is an opportunity to work on worthwhile technology that is helping to increase decarbonisation whilst working on complex and interesting systems with continual learning opportunities.
 
 
 
 
 
 
 WFH Policy:
 
 
 
 You'll join colleagues in the Amsterdam office two days a week with flexibility to work from home the other three days.
 
 
 
 
 
 
 About you:
 
 
 <ul>
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 You have strong serverside Kotlin experience (Java background is good)
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 You have experience with Spring Boot and microservices
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 You have a thorough understanding of Computer Science fundamentals such as OOP, Design Patterns, Data Structures
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 You have a good knowledge of AWS
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 You have a good understanding of CI/CD, DevOps
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 You also have some JavaScript, Angular, React front end skills
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 You're collaborative, enjoy problem solving and continually learning
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 You're keen to work in a start-up / scale-up environment with lots of ownership
 </li>
 </ul>
 
 
 
 
 
 What's in it for you:
 
 
 <ul>
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 Salary to &euro;85,000
 </li>
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 Flexible working in a relaxed technology focussed environment
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 Continual learning and self-development opportunities
 
 
 </li>
 </ul>
 
 
 
 
 
 Apply now
 
 to find out more about this Full Stack Developer / Engineer (Kotlin AWS JavaScript) opportunity.
 
</div>

Full Stack Developer Kotlin AWS JavaScript - Start-up

Grow Solutions

Role OverviewWe are looking for an Android Developer with 1&ndash;3 years of professional experience whocan independently develop and maintain production-ready Android applications.The ideal candidate should have strong expertise in Kotlin, MVVM architecture, XML UIdevelopment, Android framework components, and production debugging. The candidateshould also have a strong understanding of application performance, clean code practices,and modern Android development standards.We value developers who embrace modern AI-powered development practices and caneffectively use AI tools to enhance productivity, improve code quality, speed up debugging,generate documentation, and assist in technical research. We expect engineers to criticallyevaluate AI-generated solutions and apply strong engineering judgment before implementingthem in production.��Key Responsibilities● Develop and maintain Android applications using Kotlin (100% Kotlin-first).● Independently implement new features from requirement analysis to productionrelease.● Build scalable applications using MVVM architecture with proper separation of UI,ViewModel, UseCase, and Repository layers.● Design and maintain XML-based UI using ConstraintLayout and Material Designprinciples.● Integrate REST APIs using Retrofit, OkHttp, and Gson.● Implement local storage using Room Database and DataStore where appropriate.● Use Kotlin Coroutines for asynchronous programming and proper threadmanagement.● Debug production issues using Crashlytics, logs, and analytics.● Participate in code reviews and contribute to architecture and technical discussions.● Collaborate closely with QA, Backend, Product, and Design teams to deliver stablereleases.● Stay updated with the latest Android technologies, Google Play policies, AIadvancements, and development best practices.● Utilize AI-powered development tools such as Claude, Gemini, Cursor, ChatGPT,or similar to improve development productivity, debugging, documentation, codereviews, refactoring, and technical research.● Validate, optimize, and review AI-generated code to ensure correctness,performance, security, maintainability, and production readiness.● Continuously explore emerging AI tools and recommend improvements to the team&rsquo;sengineering workflow.��Technical Requirements● 1&ndash;3 years of professional Android development experience.● Strong proficiency in Kotlin with null-safety, extension functions, Coroutines, Flow,and StateFlow.● Strong understanding of MVVM architecture and Clean Architecture principles.● Experience with XML-based UI development using ConstraintLayout.● Good knowledge of Android SDK components (Activities, Fragments, Services,Broadcast Receivers, and Content Providers).● Experience integrating REST APIs using Retrofit, OkHttp, and Gson.● Hands-on experience with Room Database.● Good understanding of Dependency Injection using Hilt.● Strong understanding of Android lifecycle and configuration changes.● Experience handling runtime permissions and background execution limitations.● Good understanding of Git and version control workflows.● Experience with Gradle build system, product flavors, and build variants.● Familiarity with Firebase services such as Crashlytics, Analytics, Remote Config, andFCM.● Understanding of Play Store release process and Google Play policies.��AI &amp; Modern Development Practices● Comfortable using AI-powered development tools such as Claude, Gemini, Cursor,ChatGPT, or similar as part of the daily development workflow.● Ability to write effective prompts for debugging, code generation, technicaldocumentation, architecture discussions, and problem-solving.● Strong understanding of validating, optimizing, and improving AI-generated codebefore production implementation.● Ability to use AI responsibly while maintaining engineering best practices, security,and code quality.⭐Good to Have● Experience working on production applications with a large user base.● Knowledge of application performance optimization and memory management.● Experience debugging ANRs, crashes, and production issues.● Understanding of Android security best practices and secure data storage.● Basic knowledge of unit testing and debugging methodologies.● Experience integrating AI APIs or LLM-powered features into Android applications.● Passion for exploring emerging AI technologies and applying them to improvesoftware engineering productivity.��What We&rsquo;re Looking For● Strong debugging and analytical thinking skills.● Ability to independently own features from development to release.● Passion for writing clean, maintainable, and scalable code.● Strong problem-solving mindset with attention to performance and user experience.● Willingness to learn new Android technologies, AI tools, and engineering practices.● Ability to quickly understand existing codebases and contribute effectively.● Team player with good communication and collaboration skills.● Positive attitude, ownership mindset, and eagerness to continuously improve.● Strong interest in AI-assisted software development and modern engineeringpractices.��Why Join Grow Solutions?● Work on real-world Android applications with millions of users.● Solve challenging Android engineering and performance problems.● Learn from experienced Android developers through code reviews and mentorship.● Strong engineering culture focused on clean architecture and best practices.● AI-first engineering culture that encourages developers to leverage modern AItools to improve productivity, innovation, and software quality.● Opportunity to work with modern Android technologies and AI-assisted developmentworkflows.● Stable work environment with long-term career growth.● Continuous learning opportunities, technical ownership, and exposure to modernengineering practices.��Interested?Send your resume to hr@growsolutions.in or DM us for more details.Pay: ₹12,000.00 - ₹60,000.00 per monthWork Location: In person

Android Developer

adesso SE

<div>
 Wir geh&ouml;ren zu den Top-Adressen in der IT-Welt und fokussieren uns auf die Optimierung der Kerngesch&auml;fts&shy;prozesse unserer Kunden. Durch den smarten Einsatz ma&szlig;geschneiderter IT-L&ouml;sungen unterst&uuml;tzen wir unsere Kunden dabei, das Beste aus ihrem Business und aktuellen Technologien herauszuholen. Unseren Erfolg aber erreichen wir nur durch eins: die Menschen bei adesso! Sie bringen Ideen, fachliches Know how und Technologien zusammen. Gemeinsam programmieren wir (deine) Zukunft bei adesso.
 
 
 
 DEINE ROLLE
 
 
 
 <ul>
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 Technische Konzeption und Entwicklung: Du &uuml;bernimmst die technische Konzeption, Entwicklung und Implementierung von Software-Anwendungen in einem agilen Projektumfeld.
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 Softwarel&ouml;sungen: Du entwickelst hochwertige, robuste und skalierbare Softwarel&ouml;sungen unter Verwendung von Kotlin.
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 Anforderungsdokumentation: Du dokumentierst und erweiterst fachlich sowie technisch die kundenspezifischen Anforderungen.
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 Agile Methoden: Du nutzt agile Entwicklungsmethoden und modernste Technologie im Entwicklungsbereich.
 
 
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 </ul>
 
 DEIN PROFIL
 
 
 
 <ul>
 <li>
 IT-Hintergrund und Erfahrung: Neben einem IT-Hintergrund und mehrj&auml;hriger Berufserfahrung z&auml;hlt vor allem deine Leidenschaft f&uuml;r das Programmieren und Innovationen. Du hast Lust, dich in neue Themen reinzudenken und neue Technologien, Tools, etc. zu entdecken.
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 Kotlin-Expertise: Du konntest Expertise in der Kotlin-Entwicklung mit verschiedenen Datenbanken und Frameworks in einem agilen Projektumfeld sammeln.
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 Lernfreude und Kommunikationsf&auml;higkeit: Du punktest mit gro&szlig;er Lernfreude und -bereitschaft genauso wie mit deiner offenen, kommunikativen und hilfsbereiten Art.
 </li>
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 KI Kompetenz: Du setzt KI-Tools in deinem Fachgebiet souver&auml;n ein, bewertest die Ergebnisse kritisch und unterst&uuml;tzt Kunden und adessi dabei, Potenziale von KI zu nutzen.
 </li>
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 Sprachkenntnisse: Sehr gute Deutsch- und gute Englischkenntnisse.
 
 
 </li>
 </ul>
 Unser Versprechen: Du wirst dich bei uns wohlf&uuml;hlen! Kollegial, famili&auml;r und auf Augenh&ouml;he &ndash; wir leben Austausch, Teamgeist und einen respektvollen Umgang miteinander. Diversit&auml;t und verschiedene Blickwinkel werden bei uns genauso gesch&auml;tzt wie du als Mensch. Das und viel mehr steht f&uuml;r unser ganz besonderes Wir-Gef&uuml;hl. F&uuml;r das es sogar ein Wort gibt: adessi.
 
 
 Unsere Kultur und das Zusammenarbeiten sind gepr&auml;gt von gegenseitiger Wertsch&auml;tzung, Anerkennung und Unterst&uuml;tzung. Das verbindet uns hierarchie&uuml;bergreifend &ndash; auch im Home-Office. So belegen wir zum wiederholten Mal den 1. Platz beim Wettbewerb &bdquo;Deutschlands Beste Arbeitgeber in der ITK&ldquo;!. Unser umfangreiches Trainingsangebot und ein transparentes Laufbahnstufenmodell f&uuml;r alle sorgen daf&uuml;r, dass deine Entwicklung bei uns nicht stillsteht. Denn gemeinsam zu wachsen und Chancengeber zu sein, das ist programmiert in unserer DNA.
</div>

Software Engineer Kotlin (all genders)

Speechify

<div>Mission

Speechify is the easiest way to listen to the world's information. Articles on the web, documents in the cloud, books on your phone. We absorb it all and let you listen to it at your desk, on the go, at your own speed, and with tools that make learning easier, deeper, and faster.

What streaming services have done for audio entertainment, we're doing for audio information. And whatever we're doing seems to be working. We're #1 in our category, and experiencing exponential growth.

Overview

We're looking for a Senior Software Engineer to join our Core Experiences Team. This team builds and maintains the foundational services and SDKs that power Speechify's product experience across platforms. It's a critical role for someone who enjoys working at the intersection of product and infrastructure, thinks strategically, and is passionate about designing clear, reliable APIs and simple systems that directly enhance the user experience.

What You'll Do
<ul>
<li>Collaborate with Speechify's Product Teams to scope projects, find ways to reduce scope to get faster feedback from customers, navigate the integration/UX tradeoffs relevant to different product teams, and deliver solutions via our cross-platform SDK</li>
<li>Optimize existing functionality to ship things like faster loading and more intelligent parsing by designing more efficient abstractions and improving our algorithms</li>
<li>Ship cloud functions, lightweight backend services, and jobs using Kotlin</li>
</ul>
An Ideal Candidate Should Have
<ul>
<li>Systems thinking. You know that optimizing a system requires end-to-end design, and you believe simplicity is valuable.</li>
<li>Speed. You work quickly to generate ideas and options and know how to decide which things can ship now and what things need time</li>
<li>Focus. We're a high-growth startup with a busy, remote team. You know how and when to engage or be heads down</li>
<li>Collaboration. You know how to inspire, play, and negotiate with opinionated designers, marketers, and PMs</li>
<li>Preferred Tech Stack:
<ul><li>Kotlin Multiplatform (Java experience is OK but role is Kotlin Multiplatform)</li>
<li>Prior experience with GCP is a plus</li>
</ul>
</li></ul>What We Offer
<ul><li>A fast-growing environment where you can help shape the company and product.</li>
<li>An entrepreneurial-minded team that supports risk, intuition, and hustle.</li>
<li>A hands-off management approach so you can focus and do your best work.</li>
<li>An opportunity to make a big impact in a transformative industry.</li>
<li>Competitive salaries, a friendly and laid-back atmosphere, and a commitment to building a great asynchronous culture.</li>
<li>Opportunity to work on a life-changing product that millions of people use.</li>
<li>Build products that directly impact and support people with learning differences like dyslexia, ADD, low vision, concussions, autism, and more.</li>
<li>Work in one of the fastest growing sectors of tech, the intersection of artificial intelligence and audio.</li>
</ul>
Think you're a good fit for this job?

Tell us more about yourself and why you're interested in the role when you apply.
 
And don't forget to include links to your portfolio and LinkedIn.

Not looking but know someone who would make a great fit?

Refer them!

Speechify is committed to a diverse and inclusive workplace.

Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.</div>

Senior Software Engineer, Core Experiences - Edinburgh, United Kingdom

Senior Software Engineer, Core Experiences - Cambridge, United Kingdom

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