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Back-End Developer (On-site, Ankara)
PixelByte is a fast-growing product studio building AI-powered mobile and web apps used globally. We focus on high-performance systems, seamless user experiences, and rapid prototyping with modern AI tools. We’re looking for a Back-End Developer with 3+ years of experience, based in Ankara, open to full on-site work, fluent in English and comfortable with flexible hours in a fast-paced environment to help power the next generation of our products.
What You’ll Work On
- High-traffic API services with Node.js + Express
- Scalable NoSQL models on Firestore / MongoDB / DynamoDB
- Advanced backend logic in Python (OOP, threading, multiprocessing, Flask/FastAPI)
- Secure integrations: Stripe, RevenueCat, Adapty, AI APIs, webhooks
- Caching, rate limiting, distributed locks with Redis / Valkey
- API security, JWT/Bearer token management, refresh-token flows, role-based access control (RBAC), and secure authentication practices
- Basic AI pipelines using PyTorch, OpenCV, Diffusers
- CI/CD, containerization, logging
- Cloudflare R2 + CDN
- Development and deployment on Google Cloud
- Fast prototyping with AI coding agents (Claude Code, Cursor, Copilot)
What We’re Looking For
- 3+ years of back-end development experience
- Strong experience with Node.js & Express
- Solid understanding of NoSQL data models
- Deep Python knowledge (async, OOP, performance)
- Experience with Redis / Valkey
- Practical use of PyTorch/OpenCV/Diffusers
- Good awareness of API security and system performance
- Basic DevOps (Docker, logs, monitoring)
- Familiarity with Cloudflare products
- Knowledge of Google Cloud is a big plus
- Experience with Clerk authentication is a plus
Nice to Have
- Experience with LLMs or diffusion models
- Prompt engineering or fine-tuning
- Large-scale system experience
- Mobile app backend architecture
What You Can Expect at PixelByte
- Direct involvement in shaping products used by global audiences
- Close collaboration with engineering, product, and growth teams
- On-site teamwork in Ankara with a supportive, learning-focused culture
- Space to experiment with AI tools and workflows forward
- Private health insurance to support your well-being
- Meal card provided monthly for daily comfort
- Equipment support to ensure you have the tools you need to do your best work
Key Skills
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