Open to opportunities

Oskar Mandrysz

@oskarmandrysz

Message

I build reliable Java microservices and event-driven platforms for insurance, finance, and e-commerce.

Poland

Message

What I'm looking for

I'm looking for work where I can build reliable systems without sacrificing quality, improve testing and operational practices, and collaborate with straightforward teams that value readable code and sensible structure.

I've built backend services for Prudential, Morgan Stanley, Aviva, and Zalando, supporting insurance administration, wealth management, financial market data, and e-commerce platforms. My work centres on reliable Java microservices, event-driven integrations, and high-throughput distributed systems.

I value readable code, strong testing, predictable systems, and straightforward teamwork. I enjoy improving the operational side of software through CI/CD, observability, monitoring, incident response, and cloud-native deployments on AWS, Azure, Docker, and Kubernetes.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Developer

Current

Prudential

Nov 2023 - Present (2 years 10 months)

Built backend services supporting insurance policy administration, pricing, and financial calculations. Designed Java microservices for business rule validation, customer data processing, and orchestration of insurance workflows.

Kotlin React Spring Boot Spring Cloud REST APIs AWS Lambda PostgreSQL DynamoDB Docker Gitlab CI Terraform Codex Claude Mockito WireMock SonarQube Prometheus Grafana

Java Developer

Morgan Stanley

Jul 2021 - Nov 2023 (2 years 4 months)

Delivered backend services for wealth management and capital markets platforms with a strong focus on reliability, fault tolerance, and performance in high-throughput environments. Implemented distributed, message-driven components and contributed to resilient service design.

Kotlin React Spring Boot Spring Framework REST APIs Docker Kubernetes Jenkins Git Linux Unix Oracle Azure DB2 Sybase PostgreSQL Mockito WireMock Pact SonarQube Prometheus Grafana

Java Developer

Aviva

Apr 2019 - Jul 2021 (2 years 3 months)

Engineered backend services responsible for ingesting, processing, and distributing real-time financial market data. Built high-performance Java components focused on low-latency data processing and reliable message delivery.

Spring Boot Spring Framework REST APIs Docker Kubernetes RabbitMQ PostgreSQL Oracle Azure Jenkins Git Mockito WireMock SonarQube ELK Prometheus Grafana

Java Developer

Zalando

Oct 2017 - Apr 2019 (1 year 6 months)

Powered core e-commerce and partner-facing capabilities by owning backend services in a microservices architecture. Designed and implemented Java-based APIs with Spring Boot, focusing on scalability, reliability, and clean API design.