About me

Backend engineer with 8+ years of experience designing and implementing high-performance enterprise systems. Expertise in distributed services, event-driven architectures, and API development using Java and the Spring ecosystem. Proven track record in building scalable, fault-tolerant backends and optimizing database-driven workflows. Skilled in JVM-based technologies, asynchronous processing, and integrating modern patterns into legacy systems. Fluent in English, German, Czech, and Polish.

Resume / CV

PDF | ODT

Skills

Java

Java 8–21

8 years

Spring Boot

8 years

Spring Framework

8 years

Spring WebFlux

6 years

Spring Cloud

6 years

Spring Security

7 years

Hibernate / JPA

7 years

Camunda BPM

5 years

Maven / Gradle

8 years

JUnit / Mockito

7 years

Jenkins / CI-CD

7 years

REST API Design

7 years

Microservices Architecture

6 years

OAuth2 / Keycloak

5 years

WildFly / Tomcat

5 years

Cloud

AWS

6 years

Azure

5 years

GCP

4 years

Kubernetes

6 years

Docker

7 years

Jenkins

7 years

Ansible

4 years

Terraform

5 years

Prometheus

5 years

Grafana

5 years

ELK Stack

5 years

Kafka

5 years

RabbitMQ

6 years

Vault

4 years

Languages

Java 8–21

8 years

Rust

4 years

Python

6 years

Kotlin

5 years

Scala

4 years

JavaScript / TypeScript

6 years

ReactJS

5 years

Angular

5 years

Node.js

5 years

Bash

7 years

SQL

8 years

gRPC

4 years

Protocol Buffers

4 years

Rust

Tokio

4 years

Actix

3 years

Axum

3 years

Rocket

3 years

Diesel

3 years

SQLx

4 years

Serde

4 years

Rayon

3 years

Crossbeam

3 years

Wasmtime

2 years

WebAssembly

3 years

Cargo

4 years

FFI

3 years

unsafe

3 years

ownership / lifetimes

4 years

zero-cost abstractions

3 years

memory safety

4 years

fearless concurrency

3 years

low-latency systems

4 years

Linux systems programming

5 years

Experience

Senior Software Engineer / Distributed Systems Architect, EUROPEAN PATENT OFFICE (EPO), Munich, Germany

05/2025 — 05/2026

• Integrated LLMs into legacy backend systems, automating workflows for patent examination and document processing. • Architected and deployed 20+ distributed AI agents for server monitoring and log anomaly detection in hybrid cloud environments. • Optimized Java/Spring services with Rust-inspired patterns (zero-copy parsing, async pipelines), reducing p95 latency by 40%. • Designed AI-augmented logistics document processing pipelines on AWS (EC2, S3, Lambda, Kubernetes). • Scaled ELK logging platform to process 10TB+ daily logs with ML-based pattern recognition, cutting incident response time by 50%.

Senior Software Engineer / Backend Systems Lead, GLS IT SERVICES, Frankfurt, Germany

10/2024 — 04/2025

• Led backend development of an enterprise AI helpdesk agent using Spring AI, LangChain, and RAG pipelines. • Designed and implemented asynchronous task queues and worker pools inspired by Rust concurrency models. • Deployed autonomous monitoring agents for server infrastructure, reducing manual DevOps overhead by 30%. • Hardened microservices security with Keycloak and Spring Security, integrating AI-based threat detection.

Senior Software Engineer / Enterprise Backend Developer, ORANGE POLAND, Warsaw, Poland

01/2024 — 09/2024

• Engineered high-throughput sales authentication systems (Java 17, Spring Boot, OpenAPI, WildFly) for production traffic. • Refactored critical backend paths for lock-free concurrency and memory-efficient session caching. • Extended 2FA and security mechanisms with AI-driven fraud detection heuristics (Kubernetes, OAuth2, Keycloak).

Lead Software Engineer / Event-Driven Systems Specialist, KNAPPSCHAFT, Bochum, Germany

03/2023 — 12/2023

• Designed high-performance business process workflows using Camunda Platform 8 for enterprise backend systems. • Developed event-driven backend services for intelligent document processing (Spring Boot, Kubernetes, RabbitMQ). • Led delivery of backend features for non-profit support applications (Java 21, Spring Boot 3, Spring Cloud).

Senior Software Engineer / API & Data Pipeline Developer, CIRCLE K, Warsaw, Poland

06/2022 — 03/2023

• Developed and optimized backend data pipelines for fuel and retail platforms (Java 8, Groovy, Scala, Apache Spark). • Built PoC backend systems for security heuristics and vulnerability detection in collaboration with the cybersecurity team. • Deployed microservices on Kubernetes with Kubeflow for ML pipeline automation (Docker, Vault, Elasticsearch, Kibana, Grafana).

Senior Software Engineer / Enterprise Backend Developer, ORANGE POLAND, Warsaw, Poland

07/2021 — 06/2022

• Engineered high-throughput sales authentication systems (Java 17, Spring Boot, OpenAPI, WildFly) for production traffic. • Refactored critical backend paths for lock-free concurrency and memory-efficient session caching. • Extended 2FA and security mechanisms with AI-driven fraud detection heuristics (Kubernetes, OAuth2, Keycloak).

Senior Software Engineer / Middleware & API Developer, WORKFUSION, Warsaw, Poland

05/2020 — 06/2021

• Developed middleware and backend APIs for IoT smart home solutions (Java 7, Spring WebFlux, Kafka, MongoDB). • Mentored junior developers and conducted performance tuning for backend systems in production environments.

Earlier Contracts

04/2018 — 04/2020

• Amaris Consulting (04/2018–04/2019) — Built an AI-powered bidding platform (Java 11, Spring MVC, Hibernate, PostgreSQL, Angular 7); implemented ML algorithms and banking data migration automation (Python, Murex, OpenHFT, FIX). • Broadcom Inc. (04/2019–08/2019) — Developed APIs and backend services for mainframe products (Java 8, Spring Boot, JUnit, Mockito, Jersey, IBM z/OS); created Cucumber E2E test suites and Jenkins CI pipelines. • DHL International GmbH (08/2019–12/2019) — Built Big Data scheduling and performance reporting applications (Java 8, Spring Boot, Oracle 12g, Teradata, AWS S3). • E.Stradis GmbH (12/2019–04/2020) — Developed credit risk management backend systems on low-latency Linux platforms (Java 7, Java EE, Spring 4, EJB, JMS).

MBA, The Power Business School

2023 — 2024

IT Project Management, Postgraduate Studies, Warsaw School of Computer Science

2021 — 2022

Computer Science, Bachelor of Science, Warsaw School of Computer Science

2014 — 2018