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English
$
USD
I will develop or fix your java spring boot backend and rest API
Trevor Z.
About this gig
Need a reliable Java backend? I build and fix Spring Boot services for startups and businesses.
What I can do:
- REST APIs with Spring Boot 2/3 and Java 8 to 21
- Spring Cloud microservices (Gateway, OpenFeign, Nacos or Eureka)
- MySQL, PostgreSQL and Redis with MyBatis-Plus or JPA, query tuning, sharding
- Spring Security and JWT authentication
- Payment and third-party API integrations (Stripe, PayPal, webhooks)
- Bug fixing, performance problems, upgrading old Spring Boot projects
- Docker, Swagger/OpenAPI docs, unit and API tests
How I work:
- You send the requirements, or repo access for a bug fix
- I confirm scope and timeline before starting
- You get clean, commented code in Git with a short README
Please message me before ordering so we can agree on scope; that keeps price and delivery time accurate.
Not offered: university assignments or exam help.
Get to know Trevor Z.
Trevor Z.
Java Backend Developer, Spring Boot and Microservices
- FromUnited Arab Emirates
- Member sinceOct 2026
- Avg. response time1 hour
Languages
Chinese, English
Backend engineer with 5+ years building production Java systems: Spring Boot, Spring Cloud (Gateway, OpenFeign, Nacos), MyBatis-Plus, MySQL with sharding, and Redis. I have built payment gateways and channel integrations that move real money, real-time sports data pipelines, and automated trading services in Go. I write tested, documented code and deploy it to Linux servers. Send me your requirements: I reply within a few hours and will tell you honestly if a job is not a good fit.
FAQ
Can you work on my existing Spring Boot project?
Yes. Share the repository (GitHub, GitLab or a zip) and a short description of what you need. I will review it and confirm the scope and price before you order.
Which Java and Spring Boot versions do you support?
Java 8 to 21 and Spring Boot 2.x and 3.x. I can also help migrate an older project to Spring Boot 3.
What do I need to provide?
Your requirements or API spec, database details if relevant, and access to the code. For bug fixes, the error log and the steps to reproduce help a lot.
Do you deploy the application?
The Premium package includes a Dockerfile and setup notes. Deployment to your own server or cloud account can be added as a custom offer.
