Jacek Koleżyński
Senior Software Engineer at Super
Estepona, Andalusia, Spain
Summary
🤩
Rockstar🎓
Top SchoolJacek Koleżyński is a seasoned Senior Software Engineer based in Estepona with deep experience building high-throughput, distributed systems and cloud-native services across C++, Go, Python, Java, and TypeScript stacks. His career spans mission-critical work from telecom real-time systems to large-scale log processing and authentication services, and more recently telemetry, event-sourced betting platforms on Erlang/Kafka, and serverless migrations on AWS. Comfortable across backend and frontend, he has shipped React/Next.js UIs, VSCode tooling for test ergonomics, and production services running in Kubernetes and Spring Boot. He blends system-level performance tuning and protocol expertise with pragmatic automation—often creating small internal tools (like a VSCode test runner) that boost team velocity. Known for on-call ownership, interviewing, and cross-functional collaboration, he pairs long-term architectural thinking with hands-on implementation. His background in electrical engineering and decades of low-level systems work inform a pragmatic approach to resilient, observable software.
1 year of coding experience
22 years of employment as a software developer
Master of Science (MSc) Electrical Engineering (Specialization: Computer Engineering), Master of Science (MSc) Electrical Engineering (Specialization: Computer Engineering) at Cracow University of Technology
Polish, English, Spanish
Github Skills (8)
elasticsearch10
observability10
elastic10
visualizations10
kibana10
security4
documentation2
security-hardening2
Programming languages (2)
Github contributions (5)
jkelas/kibana
Nov 2024 - Apr 2025
My Kibana Fork
Contributions:390 pushes, 24 branches in 4 months
elastic/kibana
Nov 2024 - Apr 2025
Your window into the Elastic Stack
Contributions:132 reviews, 48 PRs, 19 pushes in 4 months
elasticdashboardskibanaobservabilitywindow
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