Senior Backend Developer - Turkish Speaking

ABOUT CODEWAY

Codeway builds category-leading consumer AI apps on mobile and web, at global scale.

600M+ downloads. 60+ apps. 400+ builders across Barcelona and İstanbul. Completely bootstrapped. No board. Profitable since year two.

Small teams move faster than big ones. But they need big resources to win at scale. Nobody starts from zero. The problem decides the solution, not us.

We turn category wins into six focused vertical companies: Wishlabs (AI Creativity), Wellture (Wellness), Learna (Education), Sparked (Media), Cosmic Jam (Entertainment), and Catalyst Apps (Utilities & Productivity). Each has full ownership and the depth to go further than anyone else in its space.

Codeway HQ powers them all. One platform. One team that finds and grows builders. One set of guardrails. Every idea born here starts with an unfair advantage: the platform, the people, and the profits of every product before it. That's the system.

Turns out you can do both.

Move like an indie. Hit like a giant.

THE ROLE

As a Software Engineer, Backend at Codeway, you will design, build, and operate the scalable backend services that power mobile apps and web experiences used by millions. You won't just write code; you will own features end-to-end - from initial system design and AI integration to deployment and production monitoring - with a strong focus on API quality, performance, and reliability.

Our environment is fast-paced, and we value engineers who can turn complex architectural challenges into simple, elegant, and maintainable solutions. The ideal candidate will be comfortable building backend services for mobile products and working with API-heavy consumer apps.

You will collaborate with mobile, product, AI, and DevOps teams to ship features end to end, bringing AI-powered capabilities into production where relevant.

What You’ll Be Doing

• Design and implement scalable systems. Build high-performance backend architectures and microservices/RESTful APIs for mobile and web clients using Node.js and Python.

• Own features end-to-end. Take full responsibility for the lifecycle of your services, from ideation and implementation through to deployment (GCP/Firebase) and continuous optimisation.

• Integrate AI and media workflows. Deploy, monitor, and support LLMs and media workflows (STT/TTS, image/video/audio processing) in production, managing model serving, inference performance, and latency/cost tradeoffs.

• Architect asynchronous workflows. Implement robust event-driven systems using queues and tasks to handle heavy media and AI workloads.

• Simplify systems. Evaluate every component and process to remove unnecessary complexity and build minimalist, future-proof architectures.

• Optimise performance. Proactively identify bottlenecks across distributed systems to improve latency, throughput, reliability, and costs.

• Ensure backend quality. Establish robust error handling, security best practices, and end-to-end observability, and contribute to code quality through reviews, testing, and documentation.

• Troubleshoot and stabilise. Debug issues and proactively improve system stability and observability in production environments.

• Collaborate cross-functionally. Partner with Mobile, Frontend, Product, DevOps, and AI teams to design and ship impactful features.

What You’ll Bring

• Experience. 3+ years of professional experience as a Backend Engineer, with a track record of building consumer-facing products at scale.

• Technical excellence. Strong hands-on proficiency in both Node.js and Python, with a deep understanding of CS fundamentals, data structures, algorithms, and system design.

• System design. Experience designing and working with microservices architectures and RESTful APIs, with a solid grasp of databases, data modelling, performance optimisation, and security best practices.

• Infrastructure knowledge. Hands-on experience with cloud environments such as GCP, AWS, or Azure (GCP and/or Firebase preferred), with strong production debugging and observability habits.

• AI familiarity. Experience deploying and optimising AI models in production, including familiarity with external AI APIs and their performance considerations.

• Scale. Ability to contribute effectively in high-scale environments handling large volumes of traffic and data, with strong problem-solving skills and attention to detail.

• Communication. Proficiency in English and Turkish, with the ability to explain complex engineering decisions and trade-offs clearly to both technical and non-technical teams.

• Education. A Bachelor's or Master's degree in Computer Science, Engineering, or a related field.

Nice to have

• Experience supporting mobile apps through backend APIs.

• Experience with GCP tools such as Pub/Sub, Cloud Run, GKE, BigQuery, Cloud Functions, or App Engine.

• Familiarity with containerisation and orchestration tools such as Docker and Kubernetes.

• Experience with CI/CD pipelines and DevOps best practices.

• Familiarity with SSE or WebSockets for real-time communication.

• Experience with message brokers such as Kafka, RabbitMQ, or SQS.

What we offer

◦ The chance to work with a high-caliber, passionate international team building category-defining products
◦ Full-time contract with competitive salary
◦ Private health insurance, a generous meal card
◦ Full visa & relocation support if you’re moving to Barcelona
◦ Annual learning & development budget for courses, tools, or events that support your growth
◦ Wellness perks, including sports budget and psychological consultations.
◦ Free access to Codeway’s suite of apps across productivity, wellness, and education
◦ A top-notch office in the heart of the city