Paulina Krawel
Designing scalable, high-performance backend systems for fintech and iGaming.
Warsaw, PL
Full time/Part time/Project based
Remote
Senior Software Engineer with over 6 years of experience building and optimizing backend systems, especially for fintech and iGaming industries. Proven...
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My Career Journey
1/5
Agiliway
Senior Software Engineer
Jan 2024 - Apr 2026 | 2y 3m
Led development of scalable backend services and APIs for real-time transaction processing and game platforms. Architected low-latency RESTful APIs with Java 21/Spring Boot for 50,000+ concurrent requests...
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Spyrosoft
Senior Software Engineer
Sep 2022 - Nov 2023 | 1y 2m
Owned backend development of a high-throughput payment processing system and APIs. Built orchestration APIs supporting 10,000+ transactions per minute, refactored caching, reduced data retrieval latency...
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Revolut
Software Engineer
Aug 2020 - Sep 2022 | 2y 1m
Contributed to backend services for payments and fraud detection. Developed high-throughput transaction processing, built real-time notifications for 2M users, optimized MySQL schema, created fraud scoring...
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Avyan Global
Software Developer
Jan 2019 - Aug 2020 | 1y 7m
Developed backend services for logistics and e-commerce. Implemented RESTful APIs for order management, optimized MySQL queries, integrated third-party shipping APIs, wrote Python validation scripts, and...
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MicroSourcing
Junior Software Developer
Jan 2017 - Dec 2018 | 1y 11m
Contributed to backend development of a healthcare claims processing system. Developed Java batch modules, wrote MySQL queries for reporting, assisted in legacy migrations, participated in code reviews...
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Collaboration
Adaptability
Complex Problem Solving
Most proud of (2/3)
1st
Built orchestration APIs handling 10,000+ transactions/min and refactored caching to cut data latency by 60%.
2nd
Architected low-latency Java 21/Spring Boot REST APIs for 50,000+ concurrent rps; implemented Kafka and Redis distributed services.
Career Highlights
1/1
Senior Software Engineer, Agiliway (2024–2026)
Architected low‑latency APIs handling 50K+ concurrent RPS
Poland,
In 2024–2026 as Senior Software Engineer at Agiliway I led the design and delivery of scalable...
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