Backend Developer

We are looking for a Backend Developer to join our engineering team. You will design, build, and operate backend services that support mobile apps and web experiences, with a strong focus on API quality, performance, and reliability. 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, and you'll help bring AI-powered capabilities into production where relevant.

What You'll Be Doing

• Design, develop, and maintain scalable backend services supporting mobile and web clients.
• Build and evolve microservices and RESTful APIs with clean, maintainable architecture.
• Deploy, monitor, and support AI models and data-driven services in production environments.
• Optimize system performance, reliability, and scalability across distributed systems.
• Collaborate closely with mobile, frontend, AI, product, and DevOps teams to deliver new features end to end.
• Troubleshoot, debug, and proactively improve system stability and observability.
• Contribute to code quality through reviews, testing, and documentation.

• 2 - 5 years of professional backend experience.
• Strong hands-on experience with both Node.js and Python.
• Experience designing and working with microservices architectures and RESTful APIs
• Solid understanding of databases, data modeling, and performance optimization.
• Experience with cloud environments such as AWS, GCP, or Azure.
• Good grasp of data structures, algorithms, and system design fundamentals.
• Ability to contribute effectively in high-scale environments handling large volumes of traffic and data.
• Strong problem-solving skills and attention to detail.
• Bachelor's degree in Computer Science, Engineering, or a related field.
• Comfortable working in English in a collaborative product team.

Nice to have

• Experience supporting mobile apps through backend APIs.
• Experience deploying or operating AI/ML models or AI-powered services.
• Experience with Google Cloud services (e.g., Pub/Sub, Cloud Functions, App Engine) and Firebase.
• Familiarity with containerization and orchestration tools such as Docker and Kubernetes.
• Experience with CI/CD pipelines and DevOps best practices.
• Understanding of backend security principles and secure API design.
• Exposure to machine learning workflows, model deployment, or AI-related infrastructure.

• 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 The Recruiting Process We are committed to keeping our recruitment process short and transparent. Here's how it looks like

Codeway is a global consumer tech company with more than 400M users worldwide. Since 2020, we've built and scaled 60+ mobile apps across creativity, productivity, wellness, language learning, and entertainment. Our flagship apps - Retake AI, Cleanup, Learna, and DramaPops - and many of them lead their categories globally. In 2024, we became the most downloaded app publisher on iOS, driven by cutting-edge AI research, sharp data-driven execution, and a relentless focus on product and marketing. We're a team of 300+ people across İstanbul and Barcelona who bring curiosity, passion, trust, and ownership to everything we build. Recognized as a #1 LinkedIn Top Startup and a Great Place to Work in Europe, Codeway is where ambitious people do their life's best work. We're building the next generation of consumer tech and reimagining what mobile apps can be. This is Codeway. This is our way. Join us. We are now looking for a Backend Developer to join our Barcelona team and help us build and scale high-quality mobile experiences across our consumer app portfolio.