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.net full stack developer Jobs in Istanbul

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Qlub

<div>Who are we? 
Qlub is revolutionizing the dining experience with ultra-fast, seamless payment solutions. Our technology enables customers to pay in seconds by scanning a QR code &ndash; no app download required. From Pay-at-Table QR payments and Digital Menus to Order-and-Pay tech, Payment Links, and SoftPOS terminals, Qlub streamlines the entire payment process, making it faster and more convenient for both diners and restaurants. Plus, splitting the bill with friends has never been easier!
We help restaurants focus on what they do best: providing exceptional dining experiences. By removing payment hassles, we increase table turnover and improve operational efficiency, boosting profits. Features like analytics, instant tipping and reviews, and automated accounting empower restaurants to thrive in today&rsquo;s digital-first world. 
The Role 
We're looking for a Backend Developer to support the development of panel platforms.
You'll work on payment integrations, dashboards, order flows, table management, review systems, and more. Your work will directly impact the experience of both diners and restaurant staff.
You&rsquo;ll be responsible for:<ul>
<li>Developing backend services and APIs</li>
<li>Collaborating with frontend, design, and product teams</li>
<li>Writing clean, efficient, well-documented code</li>
<li>Participating in code reviews</li>
<li>Troubleshooting, debugging, and improving system performance</li>
<li>Managing notification and email systems</li> 
</ul> 
We're looking for someone with:<ul>
<li>3&ndash;5 years of backend development experience</li>
<li>Solid TypeScript and Node.js knowledge</li>
<li>Experience with NestJS or similar frameworks (Express, Fastify)</li>
<li>Experience working with PostgreSQL</li>
<li>Working knowledge of Redis</li>
<li>Understanding of RESTful API best practices</li>
<li>Exposure to CI/CD workflows</li>
<li>Awareness of security, rate-limiting, and performance optimization</li>
Basic understanding of job/message queues (e.g., BullMQ) 
<li>
</li></ul>Why join qlub?<ul>
<li>Be part of an exciting, fast-paced environment, where you can grow the business from an early-stage start-up into a global organization;</li>
<li>Drive growth and tailoring of fast-evolving new products and features;</li>
<li>Work with highly motivated people, enthusiastic about improving the customer experience at table-service restaurants.</li> 
</ul> 
Sounds like you? Are you excited by this opportunity? If so, &ldquo;Apply now&rdquo;.</div>

Backend Developer

Lokalde

<div>
 
 
 Backend Developer (Python Django)
 
 &ndash; Join Our AI Startup
 
 
 Location: Zeytinburnu / On-site | Full time
 
 
 
 
 
 We are a fast moving AI startup building products and services for global clients. We are looking for a backend developer who writes clean scalable and reliable code and knows how to keep production calm on a Friday
 
 
 ⸻
 
 
 
 
 
 
 Tech Stack
 
 
 
 Python
 
 
 Django Framework
 
 
 PostgreSQL
 
 
 Celery
 
 
 Redis
 
 
 Elasticsearch
 
 
 AWS EC2
 
 
 AWS S3
 
 
 
 
 
 ⸻
 
 
 
 
 
 
 Bonus Points
 
 
 
 API design and optimization (REST)
 
 
 Docker and containerized deployments
 
 
 CI CD pipelines (GitHub Actions GitLab CI etc)
 
 
 Unit and integration testing culture
 
 
 
 
 
 ⸻
 
 
 
 
 
 
 Who You Are
 
 
 
 You believe a well structured database schema is an art form
 
 
 You can debug a race condition without losing your sanity
 
 
 You sleep better knowing every query is optimized
 
 
 You treat logging and monitoring as part of the build not an afterthought
 
 
 
 
 
 ⸻
 
 
 
 
 
 
 What We Offer
 
 
 
 Global scale projects with real impact
 
 
 Flexible working hours
 
 
 Competitive salary
 
 
 Small team big impact culture
 
</div>

Backend Developer (Python Django)

Pazarama

<div>
 
 
 Selam, sana anlatacaklar&inodot;m var!
 
 
 
 
 
 
 Benim ad&inodot;m Pazarama.
 
 
 
 
 
 
 Ben kim miyim?
 
 
 
 T&uuml;keticilerimin ve i&scedil; ortaklar&inodot;m&inodot;n hayat&inodot;n&inodot; kolayla&scedil;t&inodot;ran, her &scedil;eyi bulabilece&gbreve;in bir e-ticaret platformuyum. &Idot;smim "Pazar" ve "Panorama" kelimelerinin birle&scedil;iminden geliyor. E-ticaret d&uuml;nyas&inodot;na panoramik bir bak&inodot;&scedil; a&ccedil;&inodot;s&inodot; getirerek herkesin her ihtiyac&inodot;n&inodot; kar&scedil;&inodot;layabilece&gbreve;i pazar yeri yaratmak i&ccedil;in buraday&inodot;m. Dahas&inodot; &Idot;&scedil; Bankas&inodot; i&scedil;tiraki olman&inodot;n g&uuml;c&uuml; ve geni&scedil; bak&inodot;&scedil; a&ccedil;&inodot;m sayesinde, s&uuml;rd&uuml;r&uuml;lebilir bir al&inodot;&scedil;veri&scedil; ekosistemi yaratmay&inodot; hedefliyorum.
 
 
 Pazarama mobil,Pazarama web sitesi, &Idot;&scedil;Cep, Maximum Mobil, Samsung Wallet ve ma&gbreve;azalarla bana kolay ula&scedil;man i&ccedil;in her yerdeyim!
 
 
 
 
 
 Otel ve u&ccedil;ak rezervasyonundan ara&ccedil; kiralamaya, online al&inodot;&scedil;veri&scedil;ten ula&scedil;&inodot;m kart&inodot; y&uuml;klemesine hatta ara&ccedil;tan inmeden akaryak&inodot;t &ouml;demesine ve s&uuml;per &ccedil;ekili&scedil;e kadar t&uuml;m ihtiya&ccedil;lar&inodot;n&inodot; tek bir platformda kar&scedil;&inodot;laman&inodot;n deneyimini sunuyorum.
 
 
 Ama daha bitmedi...&Idot;ndirimler, taksitler ve puanlarla dolu &ouml;deme se&ccedil;enekleriyle de beni tercih edenleri memnun etmek istiyorum. Al&inodot;&scedil;veri&scedil;i sadece kolayla&scedil;t&inodot;rm&inodot;yor ayn&inodot; zamanda t&uuml;m bu sayd&inodot;klar&inodot;mla kazan&ccedil;l&inodot; hale getiriyorum. Kullan&inodot;c&inodot;lar&inodot;m ve i&scedil; ortaklar&inodot;m i&ccedil;in her g&uuml;n kendimi ve teknolojilerimi geli&scedil;tiyorum.
 
 
 
 
 
 
 Peki senin i&ccedil;in ne yapabilirim?
 
 
 
 
 
 
 Bu bir yolculuk ve yan yanay&inodot;z. Senin kariyerine destek olacak e&gbreve;itimlerle becerilerini geli&scedil;tirece&gbreve;iz ve hayallerini ger&ccedil;ekle&scedil;tirmek i&ccedil;in birlikte f&inodot;rsatlar yarat&inodot;p, geli&scedil;ece&gbreve;iz. Her ad&inodot;mda senin fikirlerinle, heyecan&inodot;nla ve yeteneklerinle bu yolculu&gbreve;u daha da renklendirece&gbreve;iz. Hata yapmaktan korkmayaca&gbreve;&inodot;n bu macerada birlikte hayallerini ger&ccedil;e&gbreve;e d&ouml;n&uuml;&scedil;t&uuml;rebiliriz.
 
 
 
 
 
 Sen de benimle bu yolculu&gbreve;a kat&inodot;lmak istersen a&scedil;a&gbreve;&inodot;daki ilana ba&scedil;vur, aram&inodot;za kat&inodot;l!
 
 
 
 
 
 Kariyer Yolculu&gbreve;unda Pazarama Yan&inodot;nda 💙
 
 
 
 
 
 
 
 Genel Nitelikler
 
 
 
 <ul>
 <li>
 &Uuml;niversitelerin Bilgisayar M&uuml;hendisli&gbreve;i, Yaz&inodot;l&inodot;m M&uuml;hendisli&gbreve;i, Matematik gibi ilgili alanlar&inodot;ndan mezun,
 </li>
 <li>
 Alan&inodot;nda en az 4 y&inodot;l tecr&uuml;beli,
 </li>
 <li>
 &Ccedil;ok katmanl&inodot; ve da&gbreve;&inodot;t&inodot;k mimarilerde C#, .NET Core ile web siteleri, portallar geli&scedil;tirme deneyimine sahip,
 </li>
 <li>
 REST ve SOAP servisleri (Web API ve WCF) ve haberle&scedil;me protokolleri hakk&inodot;nda g&uuml;&ccedil;l&uuml; deneyim sahibi,
 </li>
 <li>
 Nesne y&ouml;nelimli programlama, DDD ilkeleri ve SOLID prensiplerine hakim,
 </li>
 <li>
 Elasticsearch deneyimi olan,
 </li>
 <li>
 Uygulama/sistem mimarisi konusunda bilgi sahibi (Load Balancer, WAF, Firewall),
 </li>
 <li>
 Web Uygulama ve API G&uuml;venli&gbreve;i konusunda tecr&uuml;beli (sertifika y&ouml;netimi, AES, RSA, OAUTH)
 </li>
 <li>
 Karma&scedil;&inodot;k sorunlar&inodot; de&gbreve;erlendirme ve pratik &ccedil;&ouml;z&uuml;mler &ouml;nerebilecek seviyede problem &ccedil;&ouml;zme becerilerine sahip,
 </li>
 <li>
 DevOps konusunda tecr&uuml;beli (CI/CD),
 </li>
 <li>
 Tercihen containerization ile deneyimi olan (Docker/Kubernetes),
 </li>
 <li>
 Tercihen online &ouml;deme sistemleri, e-ticaret, g&uuml;venlik y&ouml;ntemleri ve banka entegasyonlar&inodot; konusunda tecr&uuml;beli.
 </li>
 </ul>
 
 
 
 
 
 Bu ilan sebebiyle yapaca&gbreve;&inodot;n&inodot;z ba&scedil;vurular arac&inodot;l&inodot;&gbreve;&inodot;yla toplanacak ki&scedil;isel verileriniz, veri sorumlusu Topkap&inodot; Dan&inodot;&scedil;manl&inodot;k Elektronik Hizmetler Pazarlama ve Ticaret A.&Scedil;. taraf&inodot;ndan 6698 say&inodot;l&inodot; Ki&scedil;isel Verilerin Korunmas&inodot; Kanunu (&ldquo;KVKK&rdquo;) ve ilgili mevzuat kapsam&inodot;nda i&scedil; ba&scedil;vuru s&uuml;re&ccedil;lerinin y&uuml;r&uuml;t&uuml;lmesi amac&inodot;yla otomatik yollarla i&scedil;lenecektir. Ayd&inodot;nlatma Metni&rsquo;ne
 
 https://cdn.pazarama.com/docs/is-basvurusu-aydinlatma-metni.pdf
 
 linkinden ula&scedil;abilirsiniz. &Idot;lan&inodot;m&inodot;za ba&scedil;vuru yapman&inodot;z halinde ilgili metnin t&uuml;m&uuml;n&uuml; onaylam&inodot;&scedil; kabul edileceksiniz.
 
 
</div>

Senior Backend Developer (.Net Core)

viravira.co

<div>
 We are looking for a Full Stack Developer who will develop the backend and improve the front end. As a Full Stack Developer, you will work with application and technical architects to translate a business need into a robust and integrated technology solution. You will be solving unique and challenging software problems and develop innovative solutions.
 
 
 
 What You'll Be Doing
 
 
 
 <ul>
 <li>
 Develop front end website architecture.
 </li>
 <li>
 Design user interactions on web pages.
 </li>
 <li>
 Develop back end website applications.
 </li>
 <li>
 Create servers and databases for functionality.
 </li>
 <li>
 Ensure responsiveness of applications.
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 <ul>
 <li>
 Bachelor&rsquo;s degree in computer engineering or related field.
 </li>
 <li>
 Proficiency in English.
 </li>
 <li>
 2+ years of working experience.
 </li>
 <li>
 Understanding the design principles behind a scalable application and microservices architecture.
 </li>
 <li>
 Implementing automated testing platforms and unit tests.
 </li>
 <li>
 Proficiency with fundamental front-end languages such as HTML, CSS, and JavaScript (ES6 / ES7).
 </li>
 <li>
 Proficiency with React.js and server-side rendering technologies such as Next.js or Apollo.
 </li>
 <li>
 Proficiency with Node.js and frameworks available for it (such as Express.js).
 </li>
 <li>
 Understanding the nature of asynchronous programming.
 </li>
 <li>
 Proficient understanding of code versioning tools, such as Git.
 </li>
 <li>
 Knowledge of GNU/Linux operating system.
 </li>
 <li>
 Working experience with Redis, PostgreSQL, MongoDB.
 </li>
 <li>
 Knowledge of GraphQL is a big plus.
 </li>
 <li>
 Incredible attention to detail.
 </li>
 <li>
 Sense of ownership and pride in your performance and its impact on company&rsquo;s success.
 </li>
 <li>
 Intellectually curious, eager to learn, highly organized, and ready to get into action.
 </li>
 <li>
 Problem solving and critical thinking abilities.
 </li>
 <li>
 Self-starter and able to work independently.
 
 
 </li>
 </ul>
 
 Benefits
 
 
 
 <ul>
 <li>
 Salary
 </li>
 <li>
 Basic sailing training
 </li>
 <li>
 Remote working model
 </li>
 <li>
 Meal card
 </li>
 <li>
 No-dress code
 </li>
 <li>
 An exciting environment to support growth and personal development
 </li>
 <li>
 We also offer many hard and soft skills training to help you improve and challenge yourself. You'll have access to Udemy where you can choose countless courses to satisfy your hunger for knowledge
 
 
 </li>
 </ul>
 
 We will process your personal data as part of our recruitment procedures.
 
</div>

Full Stack Developer

Fundraise Up

<div>
 Highlights
 
 
 Location: Remote (CET hours preferred)
 
 
 Compensation: $3,800 - $5,100 + stock options
 
 
 Language: Russian-speaking team
 
 
 
 About Fundraise Up
 
 
 
 We&rsquo;re Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility-first design.
 
 
 Our platform is trusted by many of the world&rsquo;s leading nonprofits, including UNICEF, the Alzheimer&rsquo;s Association, and a wide range of global NGOs. With a 4.9/5 rating across top software review platforms, we&rsquo;re recognized not just for our impact - but for the quality of the product we deliver.
 
 
 A Truly Global Product
 
 
 We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe.
 
 
 We&rsquo;re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.
 
 
 Our backend is powered by Node.js (Koa, NestJS) and MongoDB. The frontend stack includes Webpack, Vue.js, and React, with nearly all code written in TypeScript. For high-throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in ClickHouse, and we use Elasticsearch for search.
 
 
 The Team
 
 
 We are a distributed team of 160+ product professionals, including 80+ engineers. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus. Many of our developers bring 5 - 10+ years of experience, and we foster a culture of deep technical curiosity and knowledge sharing.
 
 
 Despite our scale, we operate like a focused team - where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. Biweekly engineering forums give space to share learnings and celebrate technical achievements. You&rsquo;ll be joining a team where quality, mentorship, and mutual respect come first.
 
 
 
 About The Role
 
 
 
 As a Senior Fullstack Developer, you will be a key contributor to our core product, building and scaling features that are central to the donation experience for millions of users. You'll leverage your expertise in Node.js, React, and TypeScript to develop complex components&mdash;from dynamic donation widgets to data-driven admin dashboards&mdash;with a relentless focus on code quality, scalability, and user experience.
 
 
 This is an ideal opportunity if you love solving real-world problems at scale and want to grow within a mission-driven, high-impact engineering culture.
 
 
 What You&rsquo;ll Do
 
 
 <ul>
 <li>
 Design, build, and maintain resilient frontend and backend features using React and Node.js.
 </li>
 <li>
 Develop our core products, including donation checkouts, embeddable widgets, and donor/partner portals.
 </li>
 <li>
 Architect and develop system components that scale across millions of monthly transactions.
 </li>
 <li>
 Write clean, well-documented, and thoroughly testable code.
 </li>
 <li>
 Drive architecture and technical design discussions to find elegant solutions to complex problems.
 </li>
 <li>
 Mentor peers by conducting thoughtful code reviews and providing constructive feedback.
 </li>
 <li>
 Partner with product managers and designers to clarify requirements and shape the roadmap.
 </li>
 <li>
 Proactively identify and resolve bugs, performance bottlenecks, and optimization opportunities.
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 <ul>
 <li>
 7+ years of professional fullstack development experience.
 </li>
 <li>
 Deep understanding of modern JavaScript (event loop, closures, promises, prototypes).
 </li>
 <li>
 Expert-level proficiency with React and its ecosystem (familiarity with Vue is a plus).
 </li>
 <li>
 Strong backend expertise with Node.js (experience with Koa or NestJS is highly preferred).
 </li>
 <li>
 Experience with Webpack configuration, performance optimization, and profiling.
 </li>
 <li>
 A keen eye for detail and a high sense of ownership and accountability for your work.
 
 
 </li>
 </ul>
 Nice to Have
 
 
 <ul>
 <li>
 Experience with MongoDB, ClickHouse, or Elasticsearch
 </li>
 <li>
 Familiarity with Docker, CI/CD pipelines, or cloud infrastructure
 </li>
 <li>
 Contributions to open-source projects or a strong personal portfolio
 
 
 </li>
 </ul>
 Bonus points
 
 
 <ul>
 <li>
 Curiosity and a hypothesis-driven mindset
 </li>
 <li>
 Ability to communicate complex analytical concepts to non-technical audiences
 </li>
 <li>
 Detail-oriented with a strong sense of ownership
 </li>
 <li>
 Comfort working in fast-paced, data-rich environments
 
 
 </li>
 </ul>
 Why work with us
 
 
 <ul>
 <li>
 A strong, collaborative product team that owns what it builds
 </li>
 <li>
 Clear product vision and access to real customer feedback from global nonprofit leaders
 </li>
 <li>
 Flat structure: no politics, just great work with great people
 </li>
 <li>
 Transparent company culture-we share how we&rsquo;re growing, where revenue comes from, and what&rsquo;s next
 </li>
 <li>
 Long-term focus: we offer equity options and value sustained, meaningful contribution
 
 
 </li>
 </ul>
 
 Benefits
 
 
 
 <ul>
 <li>
 31 days off
 </li>
 <li>
 100% paid telemedicine plan
 </li>
 <li>
 Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace.
 </li>
 <li>
 English learning courses
 </li>
 <li>
 Relevant professional education
 </li>
 <li>
 Gym or swimming pool
 </li>
 <li>
 Co-working
 </li>
 <li>
 Remote working.
 </li>
 <li>
 Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company.
 </li>
 </ul>
</div>

Fullstack Developer

Seven Apps

<div>Key Responsibilities:<ul>
<li>Build and enhance internal tools using Retool, Airtable, n8n, Strapi, and Firebase,</li>
<li>Automate workflows and processes using Python and Node.js, with exposure to AWS Lambda and other serverless solutions,</li>
<li>Collaborate with the backend team to integrate and optimize internal systems,</li>
<li>Document and share learnings through &quot;how-to&quot; guides, and test/improve tools based on team feedback,</li>
<li>Research and prototype new automation frameworks, exploring emerging technologies.</li>
</ul>Requirements<ul>
<li>Currently pursuing or recently graduated in Computer Science, Software Engineering, or a related field,</li>
<li>No prior professional experience required: personal, academic, internship, open-source projects, or other job experience all count, while prior industry experience is a plus,</li>
<li>Familiarity with Python or Node.js, and exposure to internal tool platforms such as Retool, Airtable, n8n, Strapi. Experience with Next.js or backend frameworks like Python FastAPI is a plus,</li>
<li>Experience with AWS Lambda and cloud based automation is a plus but not required,</li>
<li>Strong problem-solving mindset, effective communication, curiosity, and comfort asking questions,</li>
<li>Fluency in English, both verbal and written,</li>
<li>Ability to work on-site for five days during the summer break, and at least three days during the academic year,</li>
<li>Hustler at heart -&gt; You take full ownership of your processes and consistently deliver outstanding results.</li>
</ul>Benefits<ul>
<li>&#10024; Work from Istanbul&rsquo;s most vibrant office &mdash; Kolektif Levent</li>
 <li>Daily meal allowance + transportation support</li>
<li><ul><li>Unlimited coffee, tea, and all the snacks your brain needs</li></ul></li></ul></div>

Automation Engineer Intern

Crystal Intelligence

<div>Position Summary:
 
 
We are looking for a talented Senior Data Platform Engineer to join our Blockchain team, to participate in the development of the data collection and processing framework to integrate new chains. This is a remote role and we are flexible with considering applications from anywhere in Europe.
 
 
More details: crystalblockchain.com
 
 
Duties and responsibilities:
<ul><li>Integration of blockchains, Automated Market Maker (AMM) protocols, and bridges within Crystal's platform;
</li></ul><ul><li>Active participation in development and maintenance of our data pipelines and backend services;
</li></ul><ul><li>Integrate new technologies into our processes and tools;
</li></ul><ul><li>End-to-end feature designing and implementation;
</li></ul><ul><li>Code, debug, test and deliver features and improvements in a continuous manner;
</li></ul><ul><li>Provide code review, assistance and feedback for other team members.
</li></ul>Required:
<ul><li>8+ years of experience developing Python backend services and APIs;
</li></ul><ul><li>Advanced knowledge of SQL - ability to write, understand and debug complex queries;
</li></ul><ul><li>Data Warehousing and database basic architecture principles;
</li></ul><ul><li>POSIX/Unix/Linux ecosystem knowledge;
</li></ul><ul><li>Strong knowledge and experience with Python, and API frameworks such as Flask or FastAPI;
</li></ul><ul><li>Knowledge about blockchain technologies or willingness to learn;
</li></ul><ul><li>Experience with PostgreSQL database system;
</li></ul><ul><li>Knowledge of Unit Testing principles;
</li></ul><ul><li>Experience with Docker containers and proven ability to migrate existing services;
</li></ul><ul><li>Independent and autonomous way of working;
</li></ul><ul><li>Team-oriented work and good communication skills are an asset.
</li></ul>Would be a plus:
<ul><li>Practical experience in big data and frameworks &ndash; Kafka, Spark, Flink, Data Lakes and Analytical Databases such as ClickHouse;
</li></ul><ul><li>Knowledge of Kubernetes and Infrastructure as Code &ndash; Terraform and Ansible;
</li></ul><ul><li>Passion for Bitcoin and Blockchain technologies;
</li></ul><ul><li>Experience with distributed systems;
</li></ul><ul><li>Experience with opensource solutions;
</li></ul><ul><li>Experience with Java or willingness to learn.</li></ul></div>

Senior Data Platform Engineer (Remote)

Explore 54+ Backend developer in Istanbul this September. Find roles across top companies and apply now to boost your career.