Backend / DevOps Engineer
Ersel Seyit
I build backend systems, microservices, and cloud infrastructure that scale. Based in Istanbul.
Work
Featured Projects
Solo-built telecom operations platform — 10 services, 19 pods, 113K lines of code across 5 languages. API gateway with JWT/RBAC auth, AI diagnostic engine with anomaly detection and root cause analysis, edge-to-cloud data pipeline with C binary protocol library, and real-time React dashboard with WebSocket streaming.
Dead Zone
2D action-platformer built from scratch with Phaser 3. Custom physics system, AI-driven enemies, boss fights, and procedurally generated tilemaps.
Medical Imaging App
Cross-platform medical imaging application with custom TensorFlow models and REST API backend, achieving 95% diagnosis accuracy across 10,000+ images.
Financial Planning App
Financial planning application with Python backend, integrating OpenAI GPT API for natural language budget analysis and personalized recommendations.
About
Building at the Edge
I'm a backend and DevOps engineer based in Istanbul with a focus on building scalable microservices, cloud infrastructure, and production-grade systems.
My latest project is a solo-built telecom operations platform — 10 services, 19 pods, 113K lines of code across 5 languages. From API gateways with JWT auth to AI diagnostic engines with anomaly detection, I build end-to-end.
When I'm not engineering systems, I build games. Dead Zone is a 2D action-platformer built with Phaser 3 and TypeScript.
Languages
- Java
- Python
- Go
- C
- TypeScript
- SQL
Backend
- Spring Boot/Cloud
- Microservices
- REST API Design
DevOps
- Kubernetes
- Docker
- CI/CD
- GitLab CI
Databases
- PostgreSQL
- MySQL
- PostGIS
- MongoDB
- Redis
Messaging
- RabbitMQ
Monitoring
- Prometheus
- Grafana
- Zipkin
- Loki
Security
- Keycloak
- OAuth2
- JWT
- RBAC
Tools
- Git
- Linux
- Maven
- Flutter
- TensorFlow
Testing
- JUnit
- Mockito
- Integration Testing
Experience
Where I've Worked
Research Engineer @ UpcoMinds
Feb 2025 — Aug 2025 · Brussels, Belgium
- Designed parallel training system partitioning datasets across Kubernetes nodes for concurrent processing, significantly reducing AI model training time
- Designed and deployed RESTful API backend using Java, Spring Boot, and PostgreSQL on Kubernetes, managing containerized service deployment, ingress, and database configuration
- Automated CI/CD pipeline with GitLab CI; secured API endpoints with Keycloak OAuth2 authentication and RBAC
Freelance Software Developer @ Freelance
Apr 2024 — Dec 2024 · Istanbul, Turkey (Remote)
- Built cross-platform medical imaging application in Flutter with custom TensorFlow models and REST API backend, achieving 95% diagnosis accuracy across 10,000+ images
- Developed financial planning application with Python backend, integrating OpenAI GPT API for natural language budget analysis
Backend Developer @ Amani AI
Jul 2022 — Feb 2023 · Istanbul, Turkey
- Implemented OpenCV-based image processing to detect invalidated Turkish IDs, automating document fraud detection and reducing manual review workload
Education
B.Sc. Computer Engineering
Yeditepe University, Istanbul · 2020 — 2024
Computer Programming
Ege University, Izmir · 2018 — 2020
Contact
Let's Build Something
I'm always open to new opportunities, collaborations, or just a good conversation about distributed systems.