Spring Boot REST API Development (DDD, OpenAPI)Missaoui Houssem
A clean, documented and secure backend that your team can extend with confidence, built with the same standards I use for banking and public-sector systems.
What you get
Domain modeling session: bounded contexts, aggregates and business rules
OpenAPI-first API contract, with generated clients for your frontend
Java 17 / Spring Boot 3 implementation in a clear layered architecture
PostgreSQL persistence with Spring Data JPA and versioned migrations
Security with OAuth2/JWT, input validation and consistent error handling
Unit and integration tests, Dockerfile and CI pipeline
API documentation and handover call
How it works
Free 30-minute scoping call and a fixed quote
Domain modeling and API contract (week 1)
Implementation in weekly milestones with a demo each week (weeks 2 to 4)
Tests, documentation and handover (week 5)
Ideal for: Startups that need a solid backend for their product, and teams splitting a monolith into services.
Why work with me
Built microservices for banking transactions and pension-insurance data processing
Currently designing a DDD-based domain API for corporate tax software
Contract-first development with OpenAPI shared between backend and frontend
Not included: Frontend work and long-term hosting or operations.
Starting at$4,500
Duration5 weeks
Tags
Java
PostgreSQL
Spring Boot
Microservices
Domain-Driven Design
Financial Services
OpenAPI
RESTful APIs
Spring Data JPA
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Missaoui Houssem Munich, Germany
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Spring Boot REST API Development (DDD, OpenAPI)Missaoui Houssem
Starting at$4,500
Duration5 weeks
Tags
Java
PostgreSQL
Spring Boot
Microservices
Domain-Driven Design
Financial Services
OpenAPI
RESTful APIs
Spring Data JPA
A clean, documented and secure backend that your team can extend with confidence, built with the same standards I use for banking and public-sector systems.
What you get
Domain modeling session: bounded contexts, aggregates and business rules
OpenAPI-first API contract, with generated clients for your frontend
Java 17 / Spring Boot 3 implementation in a clear layered architecture
PostgreSQL persistence with Spring Data JPA and versioned migrations
Security with OAuth2/JWT, input validation and consistent error handling
Unit and integration tests, Dockerfile and CI pipeline
API documentation and handover call
How it works
Free 30-minute scoping call and a fixed quote
Domain modeling and API contract (week 1)
Implementation in weekly milestones with a demo each week (weeks 2 to 4)
Tests, documentation and handover (week 5)
Ideal for: Startups that need a solid backend for their product, and teams splitting a monolith into services.
Why work with me
Built microservices for banking transactions and pension-insurance data processing
Currently designing a DDD-based domain API for corporate tax software
Contract-first development with OpenAPI shared between backend and frontend
Not included: Frontend work and long-term hosting or operations.
$4,500