Open to opportunities

Paweł Czernicki

@paweczernicki

Message

I build reliable reactive Java microservices for payment, brokerage, and logistics systems.

Poland

Message

What I'm looking for

I'm looking to build reliable, high-throughput Java systems where latency, fault tolerance, and code quality matter—especially in payments, brokerage, or other performance-critical domains.

At Match-Trade Technologies, I design and implement a reactive microservices platform of 15+ services supporting brokerage and payment operations. I work with Java, Spring Boot, Kotlin, gRPC, PostgreSQL, and RabbitMQ to build reliable, auditable, fault-tolerant backends.

I led a migration from Spring Boot 2.3.1 to 4.0.2, introduced structured concurrency with Project Lilliput, and continuously profile and resolve bottlenecks to maintain sub-millisecond critical-path responses.

Previously, I developed logistics backend systems at Capgemini and delivered Java/Spring/Hibernate features from junior and intern level onward. I value clean code, TDD, peer reviews, architecture decisions, and automated quality gates.

Experience

Work history, roles, and key accomplishments

Current

Java Developer

Current

Match-Trade Technologies

Oct 2024 - Present (1 year 10 months)

Designed and implemented a reactive microservices platform (15+ services) powering brokerage and payment operations using Java, Spring Boot 3/4, Kotlin, gRPC, PostgreSQL and RabbitMQ. Led migration from Spring Boot 2.3.1 to 4.0.2 and introduced structured concurrency with project Lilliput achieving significantly lower latency and higher throughput under load.

Java Kotlin SQL Spring Boot Spring Cloud Hibernate gRPC RabbitMQ Kafka PostgreSQL Spring Feign Git Maven Gradle Clean Code Code Review Performance Profiling Concurrency Microservices design

Education

Degrees, certifications, and relevant coursework

Poznań University of Technology

Postgraduate Studies, Software Engineering

2023 - 2024

Postgraduate studies in Software Engineering, culminating in a full-stack employee attendance and access-control system using Java, Spring Boot, Spring Security, Arduino and RFID.