Rafal Osowski

Rafal Osowski

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Senior Software Engineer
Warsaw, Masovian Voivodeship, Poland
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Timeline

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Résumé

Jobs verified_user 0% verified
  • ITFS
    Senior Software Engineer
    ITFS
    Jul 2024 - Feb 2026 (1 year 8 months)
  • Adyen
    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
  • Klarna
    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
  • PrestaShop
    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
  • Allego
    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.
  • Allegro
    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
  • Comarch
    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
Education verified_user 0% verified
  • Nanyang Technological University Singapore
    Bachelor's degree, Computer Science
    Nanyang Technological University Singapore
    Jan 2010 - Dec 2014 (5 years)
  • Nanyang Technological University
    Bachelor's degree, Computer Science
    Nanyang Technological University
    Jan 2010 - Jan 2014 (4 years 1 month)