Senior Back-End Engineer specializing in modern Java, distributed systems, and high-throughput transactional platforms. Currently at Google, Lukasz has architected resilient microservices, optimized backend and data layers, and standardized business logic, consistently improving performance and reliability. Previous roles at HSBC and KVADOS provided hands-on experience building enterprise Java services, scalable APIs, and efficient relational databases. With strong foundations in collaboration, quality testing, and service architecture, Lukasz brings a growth mindset and a drive to deliver robust engineering solutions in international and high stakes environments.

Architected high-throughput Java services using Java 17 and microservices, improving peak request handling capacity by 30%. Optimized backend services, reducing latency by 25% and consolidated business rules into shared libraries. Led test coverage expansion and introduced AI-assisted workflows, contributing to higher reliability and automation. Improved database efficiency to support greater concurrency with minimal infrastructure growth.

Senior Back-End Engineer

Built Java services and web functionality for financial workflows, reducing processing times by 20%. Standardized validation in backend services and optimized databases for faster performance. Enhanced testing practices, contributed to code reviews and automation, and collaborated cross-functionally in English-speaking teams.

Full-Stack Engineer

Developed Java server-side apps for business platforms, strengthening backend and database solutions. Implemented service modules, optimized SQL queries, and participated in refactoring and code reviews to raise code standards and decrease recurring defects.