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Fiverr Pro
English
$
USD
I will develop a rest API with java spring boot or python fastapi
Matheus L
About this gig
Need a solid backend? I build clean, scalable REST APIs with Java/Spring Boot or Python/FastAPI by a senior engineer maintaining 10+ systems in production.
WHAT YOU GET:
- REST API designed and built to your spec
- Database modeling (PostgreSQL, MySQL, Oracle)
- Authentication, validation and error handling
- Docker setup + documentation
- Clean, tested code you fully own
WHY ME:
8+ years in production systems and legacy modernization. I care about clean architecture, security and code you can maintain after delivery.
Message me with your requirements before ordering I'll confirm scope and timeline. All work handled in writing, no calls needed.
Get to know Matheus L
Matheus L
Senior Software Engineer AI Specialist
- FromBrazil
- Member sinceJun 2026
- Avg. response time1 hour
Languages
English, Portuguese
I am a software engineer with over 8 years of experience working at the intersection of software engineering and AI. I specialize in building robust systems with Java/Spring Boot and integrating AI via RAG pipelines, autonomous agents, and LLM automation. I have a strong analytical background in Electrical Engineering and currently lead ALTOSOFT to help companies modernize legacy systems and implement intelligent digital products.
FAQ
Do we need a call?
No. Everything is handled here in writing, so we always have a clear record. Send me your requirements in the chat and I'll confirm scope before we start.
Java or Python — which do you use?
Both. Java/Spring Boot or Python/FastAPI — I'll recommend the best fit for your project, or build in the one you prefer.
Which databases do you work with?
PostgreSQL, MySQL and Oracle. I handle data modeling, migrations and queries. Tell me what you use (or need) and I'll confirm.
Do I own the code?
Yes, 100%. You get the full source code and documentation — clean, maintainable, and yours to build on. No lock-in.
Can you work from my existing project or specs?
Yes. Share your repo, API spec, or a description of what you need. I'll review and confirm scope before the order starts.
Do you include tests and deployment?
Tests and CI/CD + deploy support are included in the Premium package (or available as extras). Basic and Standard focus on clean, documented, working APIs.
