About Mateusz
I work as a Senior Java Engineer with a strong focus on JVM performance, system stability, and the architecture behind large-scale backend systems. Over the years I’ve been involved in designing and evolving microservice platforms, improving their reliability, and making sure they can grow without losing performance or clarity.
In my day-to-day work, I help teams with:
• identifying performance bottlenecks and JVM-level issues
• shaping or improving microservice architecture
• bringing structure to observability – logs, metrics, traces
• reviewing critical parts of the system and suggesting practical improvements
If you need help stabilizing a backend platform, improving JVM performance, or making your architecture more coherent and maintainable, I’m happy to support you.
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- Asseco Data SystemsPrincipal Software Architect | Senior Software EngineerDecember 2022 - Today (3 years and 8 months)Szczecin, PolandManaged two engineering teams:
- Admin/DevOps team responsible for infrastructure automation, reliability, and CI/CD.
- Project team delivering identity verification solutions (e-ID Hub).
Designed vendor-agnostic architectures to ensure technological independence and fast provider switch-over in response to geopolitical or regulatory risks.Led technological transformation initiatives: system modernization, CI/CD optimization, and cloud migration.Collaborated with team leads across departments to introduce improvements in development methodologies, system security, and scalability.Ran strategic meetings and technical workshops, presenting architectural best practices to leadership and stakeholders.Mentored engineers and supported continuous skills growth across teams.Designed and maintained core backend components using Java and Spring Boot.Tech stack: Java, Spring Boot, MongoDB, RabbitMQ, PostgreSQL, Hazelcast. - JUG SzczecinLeadFebruary 2023 - Today (3 years and 6 months)
- Founder of the foundation - Szczecin JUG Foundation.
- Leading a grup of software development enthusiasts in Szczecin.
- AllegroTeam Leader | Software EngineerAugust 2021 - December 2022 (1 year and 4 months)
- Created and optimized system architectures for large-scale applications.
- Managed a team of engineers within the DEX department, driving delivery and technical excellence.
- Conducted onboarding trainings for new team members, ensuring smooth knowledge transfer and alignment with engineering standards.
- Designed and implemented a new product integrated with the Allegro platform.
- Tech stack: Java, Kotlin, Spring Boot, GCP, Terraform, on-premise Allegro AppEngine Cloud, Kubernetes, Envoy-based service mesh.
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Education
- PhD, Informatyka i technologie komputeroweWest Pomeranian University of TechnologyPhD, Informatyka i technologie komputerowe
- Magister (Mgr), InformatykaZachodniopomorski Uniwersytet Technologiczny w Szczecinie2019Magister (Mgr), Informatyka