I build reliable backend APIs and system integrations for workflow-heavy products with complex business rules, validations, and cross-system data flows.

I can work from existing requirements, API documentation, or an existing codebase — turning them into maintainable backend services and integrations that work reliably in production.

Backend API Development Design and implement REST APIs, backend services, data access, authentication, validation, and business logic.

API & System Integration Integrate third-party APIs and external systems, including authentication, data mapping, validation, error handling, retries, and reliable data flows.

Workflow & Business Logic Implement state transitions, operational workflows, permissions, validation rules, and complex domain logic — not just CRUD endpoints.

Data & Reliability Design database schemas and persistence logic with attention to transactions, consistency, failure handling, and maintainability.

Testing, Documentation & Handover Deliver tested implementation, clear API documentation, and handover notes so the system can be maintained and extended after delivery.

My primary backend stack is Java / Spring Boot, with experience across Python / FastAPI and related technologies depending on the project.