Remote worker with 11+ years of experience - Last seen 9 months ago

I am a seasoned software engineer with over 10 years of experience in designing and scaling high-load distributed systems in domains like Big Data, FinTech, and Data Governance. With a unique blend of technical expertise and leadership skills, I have consistently delivered business-critical solutions that drive performance and scalability.

Key Highlights:
• AUTO1 Group:
• Owned the checkout flow, a core system enabling the sale of cars across EU, handling 200k+ daily active users.
• Designed and implemented cloud-native microservices/features, achieving a 24% YoY increase in sales efficiency and reducing delivery times by 20%.
• Optimized production systems and improved feature delivery timelines by 90%, ensuring reliability in high-load environments.
• Tech stack: Java (11-21), Spring Boot, PostgreSQL , ELK stack
• Equifax:
• Directed the migration of a legacy system to a scalable GCP Dataflow-based platform, processing massive commercial activity data.
• Designed ETL pipelines to handle multi-channel data streams and generate actionable credit reports for U.S. legal entities.
• Scaled the engineering team from 8 to 50 and introduced SDLC processes to improve software quality and delivery efficiency.
• Delivered scalable architectures meeting reliability, performance, and compliance standards.

Technical Expertise:
• Java Development: Proficient with Java (17-21), building production-grade systems.
• Spring Ecosystem: Deep expertise in Spring Boot and related frameworks.
• Database Mastery: Advanced in PostgreSQL, transaction management, database isolation levels, Hibernate, and Liquibase.
• Message Queues: Extensive experience with Apache Kafka for distributed messaging.
• Architecture & Patterns: Expertise in CQRS, multi-threaded systems, and distributed design.

What I Offer:
• System Ownership: Proven track record of leading mission-critical projects, from architecture to production, in high-load environments.
• Leadership: Scaled and led high-performing engineering teams while driving technical excellence.
• Business Impact: Aligned technical solutions with strategic goals, delivering tangible results like increased efficiency and scalability.

I’m passionate about solving complex technical challenges, mentoring teams, and building systems that scale. Whether driving cloud migrations, optimizing distributed systems, or leading high-impact teams, I thrive in dynamic and challenging environments.

🛂 Nationality	🇺🇦 Ukraine
🏡 Residency	🇵🇱 Poland
📍 Location	🇵🇱 Poland
Remote OK	rok.co/@lumstery
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Skilled in	leadership scalability architecture performance optimization integration cloud problem solving microservices aws gcp java kotlin spring boot sql nosql graphql openapi kubernetes docker jenkins spark elasticsearch hibernate mockito junit kotlin multiplatform stream processing data pipelines api security ci cd sre ddd cloud services big data devops containerization orchestration api dev version control build tools testing automation monitoring task management deployment configuration management
Fluent in	ukrainianenglishpolishrussian
Last seen	9 months ago
Signed up	9 months ago
Badges	👨‍💻 Remote worker 🎨 Maker