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Ivan S.

@alfatrade2

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5.0
2

1.4

1.4

100%

Full-Stack Dev | Node.js, Python, Java | 10Y

$25 USD / Hour

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Germany (10:20 AM)

Joined on December 12, 2025

$25 USD / Hour

Senior Backend Developer with 10 years of hands-on experience building scalable, production-ready systems. I specialize in Java 21, Spring Boot 3, and microservices architecture. What I deliver: - REST API development and integration - Microservices architecture design and implementation - Database design and optimization (PostgreSQL, MySQL) - Bug fixing and code refactoring - Docker containerization and deployment - Message-driven systems with Apache Kafka My current stack: Java 21, Spring Boot 3.3, PostgreSQL, Kafka, Redis, Docker, Keycloak, Gradle/Maven Why work with me: - I build and maintain a 30-microservice e-commerce platform from scratch - Clean code, clear communication, on-time delivery - Available for both small tasks and long-term projects - Fast response time — usually within 1-2 hours I focus on writing maintainable, well-tested code that works in production. Let's discuss your project — I'm ready to start immediately.

5.0 · 2 Reviews
Reviews
M

RP2040 USB Sensor Data Streaming $50 CAD

He was perfect! He knows a lot about the sensors and installation. He offers a reasonable price and he completed the project in a very fast time and accurately.

Mohammad Vahid E.

@mve1375

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Guelph, Canada

4 days ago

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A

TradingView Indicator Visualization ₹1,333 INR

timely reply and immediatly solved the issue, thanks.

Ashu S.

@ashufftb

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hamirpur, India

2 months ago

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Experience

Java Developer

Jun, 2022 - Present

3 years, 9 months

Self-Employed

Jun, 2022 - Present

3 years, 9 months

No Description Provided

Jun, 2022 - Present

3 years, 9 months

Verifications

On time

100%

On budget

100%

Accept rate

100%

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