I will build, debug, and optimize java and python backend apis

J
jn_nazi
J
jn_nazi
Xia Cao
build, debug, and optimize java and python backend apis
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build, debug, and optimize java and python backend apis
Full Screen
Full Screen
build, debug, and optimize java and python backend apisbuild, debug, and optimize java and python backend apisbuild, debug, and optimize java and python backend apis

About this gig

Hi there! I'm a senior backend developer with 10 years of professional experience in Java and Python development.

I specialize in:

  • Java Spring Boot REST API development & bug fixing
  • Python FastAPI/Flask APIs and automation scripts
  • Debugging, optimizing, and refactoring backend code

Every order includes clean, well-commented code, clear documentation, and free post-delivery support.

Please message me before placing an order to discuss your project requirements. Let's build reliable backend solutions together!

  • Programming language

    • Java

  • Expertise

    • Databases

  • Frontend framework

    • Vue.js

  • Backend framework

    • Spring

  • AI & low/no code builders

    • Cursor

Get to know Xia Cao

Xia Cao

Backend Expert

  • FromChina
  • Member sinceMay 2026

  • Languages

    English
Hi there! I'm a senior backend developer with 10 years of professional experience in building and maintaining robust, scalable systems. My core expertise includes: ✅ Java Backend Development: Spring Boot, Spring MVC, RESTful APIs, microservices architecture ✅ Python API & Scripting: FastAPI, Flask, automation scripts, data processing ✅ Bug Fix & Troubleshooting: Debugging production issues, performance optimization, code refactoring Whether you need to build a new API from scratch, fix a stubborn bug, optimize slow backend code, or automate repetitive tasks, I can help.

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