Bartłomiej Graczyk
Software Engineer at Allegro
Warsaw, Masovian Voivodeship, Poland
Summary
🎓
Top SchoolBartłomiej Graczyk is a Senior Software Engineer at Allegro with five years of experience building and operating high-throughput backend systems for e-commerce. He owns the delivery method selection critical path—designing low-latency, fault-tolerant decision engines that influence millions of daily checkouts and withstand traffic spikes like Black Week. Proficient in Java, Kotlin and Spring Boot, he specializes in distributed systems, microservices and hexagonal architecture while embracing "you build it, you run it" operational ownership. He has a track record of bridging warehouse automation and customer-facing services, creating extensible delivery-rule architectures and resilient fallback patterns that preserve conversion under partial outages. Based in the Łódź/Warsaw area, he combines pragmatic engineering with deep domain knowledge of logistics and real-time pricing.
5 years of coding experience
2 years of employment as a software developer
Inżynier (Inż.), Informatics, Inżynier (Inż.), Informatics at Politechnika Łódzka
Polish, English
Github Skills (14)
human-readable10
representations10
team-project10
internationalization9
java8
database7
loss5
backend4
spring3
maven3
spring-boot3
postgresql2
hibernate2
collaboration1
Programming languages (3)
Github contributions (5)
graczyk-florczuk/distributed_programming
Nov 2020 - Jan 2021
Repository as a part of the laboratory passing in the subject "Distributed programming" at the Lodz University of Technology. Authors: Bartłomiej Graczyk (224301), Paweł Florczuk (224293).
Contributions:4 releases, 2 PRs, 36 pushes in 2 months
pythonsubjectlaboratorybartdistributed-programming
bartlomiejgraczyk/bartlomiejgraczyk
Dec 2021 - Feb 2023
Contributions:30 pushes, 1 branch in 1 year 2 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.