Jacek Kucharczyk
Senior Software Engineer at Sii Poland
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolJacek Kucharczyk is a Senior Software Engineer and entrepreneur with nine years of experience designing and delivering resilient, cloud-native microservice architectures primarily in Golang. He has led technical teams as CTO and founder, built monorepo-based systems using gRPC, event buses and Kubernetes, and migrated legacy PHP platforms into modern microservices. His hands-on expertise spans building custom Golang services (including a JBIG2 PDF encoder/decoder contributed to the popular unidoc/unipdf project), complex CI/CD pipelines, and bespoke storage engines using LevelDB/RocksDB/Pebble/BadgerDB. Comfortable across AWS, GCP and DigitalOcean, he blends deep systems-level engineering with product-minded decision making for FinTech and construction industry clients. Notably, his background in construction management and environmental engineering gives him a pragmatic, results-oriented approach to solving unusual technical problems. He is based in Warsaw and actively contributes to open-source projects while delivering production-grade distributed systems.
9 years of coding experience
11 years of employment as a software developer
Engineer’s Degree, Environmental Engineering, 5.0, Engineer’s Degree, Environmental Engineering, 5.0 at Warsaw University of Technology
Polish, English, German, Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (14)
testing10
debugging10
imagebitmap10
pdf10
debug10
bitmap10
bitmaps10
go10
bit-manipulation10
data-structure9
algorithm9
data-structures9
algorithms9
text-extraction8
Programming languages (5)
Github contributions (5)
unidoc/unipdf
Jul 2019 - Apr 2020
Golang PDF library for creating and processing PDF files (pure go)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 8 PRs, 39 comments in 9 months
Contributions summary:Jacek primarily focused on implementing and debugging a JBIG2 decoder within the Go PDF library. Their work involved implementing the JBIG2Decoder, including core components like Bitset and Bitmap, and integrating arithmetic decoders. They systematically addressed various decoding errors, improved the library with features like benchmarks and integration tests, and ensured full document decoding capabilities. The user's contributions also included code cleanup, license information, and necessary documentation.
signingpure-gopdf-generationpdf-parserpdf-document
kucjac/gentools
Jan 2021 - Oct 2022
Contributions:3 releases, 32 pushes, 1 branch in 1 year 8 months
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