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Sayidalokhon K.

Sayidalokhon K.

Java / Kotlin Spring Boot Backend Developer - REST APIs, Microservices

I'm a Java Backend Developer specializing in building secure, scalable backend systems for fintech, banking, and ecommerce platforms. ⏰ **Availability:** I work during US Eastern Time business hours (9 AM - 5 PM ET) and am available for daily standups, sprint planning, and real-time collaboration. I have production experience with Spring Boot and AI-powered applications, including real-world OpenAI API integrations. I've built production-grade backend services—banking integrations, payment processing systems, and enterprise platforms used by real customers. I work comfortably in Agile teams with international clients and focus on delivering reliable, maintainable software. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📌 How I Can Help Your Project • Build scalable Java microservices using Spring Boot • Design and develop REST APIs for web and mobile platforms • Integrate payment systems and banking APIs • Develop secure fintech backends with strong authentication (Spring Security) • Optimize backend performance and database design • Maintain clean, production-ready code ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ Tech Stack Backend: Java • Spring Boot • Spring MVC • Spring Security Persistence: Hibernate • JPA Databases: PostgreSQL • MySQL • MongoDB Architecture: REST APIs • Microservices • Distributed Systems Tools: Git • Maven • Gradle ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏦 Industry Experience • Fintech platforms • Banking systems / Banking-as-a-Service (BaaS) • Payment processing platforms • Enterprise CRM systems All projects required high reliability, security, and performance. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ What Clients Can Expect ✔ Clean, maintainable backend code ✔ Secure and scalable system design ✔ Clear communication and reliable delivery ✔ Long-term support if needed ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you're looking for a reliable Java backend developer who understands fintech and complex backend systems, let's talk. Let's build something great together 🚀

🇺🇿Tashkent, Uzbekistan$25/hr100% JSS5.00 (7)Since Jan 2023

Earnings and projects

MRR
$0

Last 6 months ÷ 6

World#260,115 / 412k
🇺🇿Country#282 / 476
Revenue, last 30 days
$0
Total earnings
$4.7k

Billed in all: $5k

World#260,115 / 412k
🇺🇿Country#282 / 476
Per project
$671
Projects, last 6 months
0
World#209,850 / 412k
🇺🇿Country#234 / 476
Projects in all
7

Across 8 contracts

63% fixed37% hourly
World#236,188 / 412k
🇺🇿Country#297 / 476

Earnings, last 30 days

$5kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$4.9k$5.0k$5.1k$5.2kOct 8Oct 23Nov 7

Skills