Khalifatur R.
Java & Spring Boot Backend Developer | REST APIs Microservices MySql
Need a backend that's fast, reliable, and built to scale? I help businesses design and build robust backend systems using Java and Spring Boot so your application runs smoothly and your team can focus on growth. With 3 years of hands-on experience, I've worked on RESTful API development, third-party integrations, and clean backend architectures for modern web applications. I write maintainable, well-documented code and communicate clearly throughout every project. What I can help you with: - Backend Development with Java & Spring Boot - Building & optimizing REST APIs - Third-party API integration - Database design & query optimization (MySQL / PostgreSQL) - Microservices architecture implementation - Debugging, fixing & improving existing backend systems - Performance tuning & system scalability - Fullstack web application development I treat every project as if it's my own clean code, on-time delivery, and clear communication are non-negotiable for me. If you need a reliable backend developer who gets things done right, let's talk.
Earnings and projects
Last 6 months ÷ 3.3 months active (since Jul 2026)
Last 6 months: $947
Billed in all: $1,072$1.1k
$947 in the last 6 months
Across 2 contracts
Across 2 contracts
Earnings, last 30 days
Skill rankings: Top 10% in Spring MVC
Ranked by MRR among everyone on Upwork with the skill.
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