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English
$
USD
I will build java spring boot rest apis, microservices and desktop apps
Juan M
4.7
4.7
About this gig
Need a reliable Java developer to build or fix your backend? I create fast, secure and scalable solutions with Java 21 + Spring Boot.
What I can build for you:
- REST APIs & endpoints (Spring Boot, JWT/OAuth2 security, Swagger docs)
- Microservices architecture (Docker, Spring Cloud)
- AI integrations: connect your app to ChatGPT, Claude or Gemini APIs
- Payment & third-party integrations (Stripe, PayPal, webhooks)
- Databases: MySQL, PostgreSQL, Oracle, MongoDB, Firebase, Supabase
- Java desktop apps (JavaFX / Swing)
- Bug fixing, performance tuning & legacy code upgrades
Why work with me:
- Clean, documented, tested code
- Clear communication and on-time delivery
- Source code + instructions included
Don't see exactly what you need? I can also help with POCs and MVPs, Angular or React frontends, and AI integrations with Claude and ChatGPT (chatbots, assistants, automations). Send me a message before ordering, tell me your idea and I'll confirm if I can cover your requirement and give you a custom offer.
Get to know Juan M
Juan M
Mike MOS
- FromMexico
- Member sinceSep 2022
- Avg. response time1 hour
- Last delivery1 year
Languages
English, Spanish
I am a dedicated Systems Engineer with a Master's in Computer Science, bringing a rich blend of academic excellence and practical experience to the table. My expertise spans across systems development, where I excel in both solo projects and collaborative team efforts. With a service-oriented mindset and a commitment to your success, I aim to not only meet but exceed customer expectations. I offer to you:
Initiative: Proactivity is at the core of my work ethic. I actively seek out solutions to turn challenges into triumphs.
Service Attitude: I work to provide a service that adds value
FAQ
Can you work on my existing project?
Yes. I can add new features, fix bugs, improve performance or migrate legacy Java code to modern Spring Boot. Just share the details and I'll review it first.
Do you deliver the full source code?
Yes. You get 100% of the source code, plus setup instructions and API documentation (Swagger/Postman) so you can run and maintain it easily.
What if I need something not listed in this gig?
Message me before ordering! I also take on POCs/MVPs, Angular or React frontends, and AI integrations with Claude or ChatGPT. Describe your requirement and I'll tell you if I can cover it, then send you a custom offer.
Reviews
2 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
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Most relevant
S strategicauto
United States
Definitely will be working with Juan on future projects! Amazing service and overall guy.
$200-$400
Price
3 weeks
Duration
Helpful?M marie1620
Canada
Ongoing collaborationeverything was fine, he knows what he does, very gentle and patient, i recommend him
$50
Price
1 day
Duration
Helpful?
Reviews
2 reviews for this Gig
| (1) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
S strategicauto
United States
Definitely will be working with Juan on future projects! Amazing service and overall guy.
$200-$400
Price
3 weeks
Duration
Helpful?M marie1620
Canada
Ongoing collaborationeverything was fine, he knows what he does, very gentle and patient, i recommend him
$50
Price
1 day
Duration
Helpful?
