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$
USD
I will develop rest apis and web apps using java and spring boot
lambert
About this gig
Need a solid, scalable Java backend? You've found the right developer.
9 years of enterprise experience. Built 15K+ QPS systems at SF Express and DiDi.
WHAT I BUILD:
- REST APIs with Spring Boot
- Microservices architecture (Spring Cloud)
- Database design (MySQL, PostgreSQL, MongoDB, Redis)
- Authentication (JWT, OAuth2, SSO)
- Third-party API integration
- Legacy system migration and refactoring
- Performance optimization and code review
- Unit and integration tests
TECH STACK:
Java 8/11/17/21, Spring Boot, Spring Cloud, Spring Security, MyBatis-Plus, JPA, MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch, RabbitMQ, Kafka, Docker, K8s, Jenkins
WHY ME:
- Led backend teams at Fortune 500 companies
- Clean, well-documented, production-ready code
- 7-day FREE support after delivery
- Daily progress updates
HOW TO START:
1. Message me with your requirements
2. I provide a detailed plan and timeline
3. You receive clean code + documentation + deployment support
Message me now - I reply within 0.5 hour!
Get to know lambert
lambert
Fullstack Java Developer and AI Agent Engineer and 9 Years Experience
- FromChina
- Member sinceApr 2026
- Avg. response time1 hour
Languages
English, Chinese, Japanese
Senior Software Engineer with 9 years in enterprise Java, cloud architecture, and AI.
WHAT I DO:
- Java, Spring Boot, Spring Cloud, REST APIs, microservices
- AI Agent Development with LangChain, Dify, n8n, RAG
- MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch
- DevOps with Docker, Kubernetes, Jenkins, Ansible
WHY ME:
- Led teams at SF Express and DiDi
- 15K QPS production systems
- AI Agents in production environments
- Invention patents in AI and Cloud Computing
Clean code, daily updates, on-time delivery, 7-day free support. Message me now!
FAQ
What information do you need to get started?
I need a clear description of your requirements, any existing code or documentation, database details, and your preferred tech stack. If you are not sure, I can help you decide.
Do you provide source code and documentation?
Yes. You will receive the complete source code, database scripts, API documentation, and deployment instructions.
Can you work with my existing codebase?
Absolutely. I have extensive experience working with legacy systems, refactoring code, and integrating new features into existing projects.
Do you offer post-delivery support?
Yes. I provide free bug fixes for 7 days after delivery. Extended support packages are also available.
What if my project is larger than your packages?
No problem. Message me with your full requirements and I will create a custom offer tailored to your project scope and budget.
What Java version do you use?
I work with Java 8, 11, 17, and 21. I'll use whichever version best fits your project and infrastructure.
Can you work on my existing project?
Yes! I can fix bugs, add features, optimize performance, or refactor your existing Java/Spring Boot codebase. Just share your repo and requirements.
Do you deploy the application too?
Yes! I can Dockerize your app and set up deployment on your server. For full DevOps setup, check out my CI/CD gig for a complete solution.
Do you write tests?
Absolutely. I write unit tests and integration tests using JUnit 5 and Mockito. The Standard and Premium packages include comprehensive test coverage.
