Full Stack Developer

Baran Kaplan

Full Stack Developer with a strong focus on Java and Spring Boot backend systems, practical DevOps and CI/CD work, and frontend development with React and Next.js.

Read my story

My background, career transition into software development, and life in Germany.

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Experience, education, and technical profile.

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Selected projects, demos, and implementation work.

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Work Areas

I work across backend engineering, DevOps delivery, and frontend product work, with the strongest focus on Java and Spring Boot systems.

Backend

I build Java and Spring Boot backend systems with clear service boundaries, maintainable business logic, and reliable integrations.

My backend work usually combines domain logic, external integrations, persistence, and production concerns rather than stopping at CRUD endpoints.

Java and Spring Boot services
Business logic and API design
Synchronous and asynchronous integrations
Persistence, transactions, and schema evolution
Security, logging, and resilience
Testing and production readiness

DevOps and CI/CD

I support containerized delivery workflows, environments, and CI/CD pipelines.

This usually means helping applications move from build to rollout with repeatable pipelines, clearer deployment steps, and better operational visibility.

Docker
Kubernetes and Helm
GitLab CI/CD
Argo CD and deployment automation
Ingress, traffic management, and Istio
Secrets and environment configuration
Observability and operational support

Frontend

I build React and Next.js interfaces that connect cleanly to backend systems and support real product flows.

That includes routing, data loading, state handling, rendering choices, and the practical UI work needed to make cross-stack product features feel deliberate.

React and Next.js product interfaces
Routing, SSR, and data fetching
State management and API integration
Responsive and accessible UI
Loading, error, and auth flows
Reusable frontend patterns

Portfolio

Projects that show the kind of backend, integration, and product work I build in practice.

Case studyLive demoReact / Next.js

Quiet Spot Finder

A product case study built in React and Next.js around calm-place discovery, protected live data access, shortlist workflows, and compare mode.

Protected live mode
Provider-backed search
Shortlist and compare flows

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PlannedBackendJava / Spring Boot

Upcoming Backend Case Study

A planned case study focused on backend integration, API design, and migration work in Java and Spring Boot environments.

Integration-focused architecture
Service boundaries and API flows
Migration and modernization themes

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PlannedDevOpsCI / CD

Upcoming DevOps Case Study

A planned case study on containerized delivery, CI/CD, and operational workflows around Kubernetes-based application deployments.

Deployment and rollout workflows
Kubernetes-oriented delivery
Operational visibility and release support

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Blog

Backend

Getting Started with DDD

A simple introduction to DDD and where it fits in backend systems.

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Backend

Building Backend Systems with Java and Spring Boot

A practical look at structure, validation, and API basics.

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DevOps

Starting Kubernetes with the Right Mindset and a First Realistic Lab

A mindset-first introduction to Kubernetes, covering cluster roles, scheduling rules, and a realistic first local lab with Minikube, PostgreSQL, Adminer, and Headlamp.

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DevOps

Kubernetes Terms and Concepts

A practical Kubernetes reference page with beginner, intermediate, and advanced concepts, plus a quick index for jumping between terms.

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Frontend

What to Know Before Learning React

The basics worth understanding before starting React.

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Contact

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