I will develop a java spring boot backend API for you

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Constantin T

About this gig

Need a robust, production-grade Java backend built the way enterprise teams actually build them?

I'm a senior software engineer with years of hands-on experience building and owning Java/Spring Boot systems in production not just tutorials-level CRUD apps.

What I bring to your project:

Real production experience Spring Boot, JPA/Hibernate, Spring Security, Java 21

Clean, layered architecture controllers, services, repositories done right

Database design relational or DynamoDB, whichever fits your use case

Observability built in when you need it OpenTelemetry, Micrometer, CloudWatch metrics, so you can see what your system is actually doing in production

Deployment-ready AWS-native (Lambda + SnapStart, ECS, or EC2) or containerized

What's included:

  • REST API with proper request validation and error handling
  • Database layer (JPA/Hibernate or DynamoDB), migrations included
  • Spring Security setup (JWT or session-based, your call)
  • Optional: OpenTelemetry tracing + CloudWatch dashboards for real production visibility
  • Clear documentation so you or your next dev can pick it up easily

Why it matters:

Most freelance Spring Boot gigs stop at "it works." I build for what happens after launch logg

Get to know Constantin T

Constantin T

Senior Software Engineer

  • FromLuxembourg
  • Member sinceJul 2026
  • Avg. response time1 hour
  • Languages

    English, Luxembourgish, German, French
I am a senior software engineer with seven years of experience designing, building, and operating production systems on AWS. I specialize in serverless architecture and AI/ML pipelines, recently leading technical delivery and security at a staff-level scope. I care about building clean, well-documented systems that remain maintainable long after launch.