Rafal Osowski Senior Software Engineer

Senior Software Engineer

ITFS

Jul 2024 - Feb 2026 (1 year 8 months)

Senior Software Engineer

Adyen

Apr 2021 - Jun 2024 (3 years 3 months)

Working on internal payment and reporting platforms used by merchants across Europe Designing and building backend services in Java, exposing REST APIs consumed by React apps Owning features end to end: API design, database changes, frontend UI, tests, and rollout Improving monitoring and alerting to reduce production issues and speed up debugging Collaborating closely with product managers and analysts in a fully remote setup

Software Engineer

Klarna

Jan 2019 - Mar 2021 (2 years 3 months)

Built and maintained customer-facing services for checkout and order management flows Developed React components used across multiple teams to keep UI consistent Worked on backend services handling payment status, risk flags, and simple scoring rules Helped migrate legacy services toward more modular Spring Boot applications Took part in on-call rotation and post-incident reviews

Software Engineer

PrestaShop

Aug 2017 - Dec 2018 (1 year 5 months)

Worked on core e-commerce features used by small and mid-size online stores Built backend APIs and admin UI screens for product and order management Added data visualizations for sales and customer metrics Improved performance of database queries for high-traffic stores Collaborated with designers and QA in a product-oriented team

Junior Software Engineer

Allego

Jul 2016 - Jul 2017 (1 year 1 month)

Developed backend functionality for marketplace systems using Java and Spring. Implemented REST APIs supporting internal services and partner integrations. Improved database performance by optimizing SQL queries and indexing strategies. Assisted in maintaining distributed services handling marketplace data. Contributed to code reviews and engineering best practices improving team productivity.

Junior Software Engineer

Allegro

Jul 2016 - Jul 2017 (1 year 1 month)

Developed internal tools supporting seller operations and customer service Implemented backend endpoints and simple frontend views Fixed bugs and improved test coverage in existing services Learned how large-scale e-commerce systems operate in practice Worked closely with senior engineers during code reviews

Software Developer

Comarch

Jul 2015 - Jun 2016 (1 year)

Supported development of CRM and billing systems for enterprise clients Implemented small features and maintained existing Java applications Wrote SQL queries and basic reports for business users Gained hands-on experience with real production systems and releases

Rafal Osowski

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