Jarek Syrokosz
Lead Data Modeler
Poland
Summary
👤
Senior🎓
Top SchoolJarek Syrokosz is a Lead Data Modeler and Data Architect with two decades of experience designing scalable data platforms and pragmatic analytics solutions across finance, retail, and sustainability domains. He specializes in Data Vault, dbt, Snowflake and Data Mesh patterns, having led large migrations (WhereScape to dbt) and enterprise implementations that transformed legacy information marts into modern, auditable warehouses. Currently focused on sustainability data, he architects Product Carbon Footprint and Scope 1–3 carbon accounting models and builds domain data products for regulatory ESG reporting. A hands-on practitioner, he combines deep modeling craft with implementation experience in CI/CD, orchestration and cloud stacks (AWS/Azure, Databricks), and has repeatedly driven performance and governance improvements in high-stakes environments. Beyond corporate work, he contributes backend fixes to open-source projects such as the Leshan LWM2M Java library, reflecting a practical interest in embedded/IoT data flows and robust error handling. He is based in Poland and brings a rare blend of rigorous engineering, regulatory awareness and sustainability-focused data strategy.
10 years of coding experience
11 years of employment as a software developer
Diplôme d'Ingénieur Communications Systems Security, Diplôme d'Ingénieur Communications Systems Security at Télécom ParisUPC Universitat Politècnica de CatalunyaMaster of Science Telecommunications Networks and Services, Master of Science Telecommunications Networks and Services at AGH University of Krakow
Polish, English, Spanish
Github Skills (10)
javas10
java-libraries10
iot10
backend10
back-end-development10
coap10
java10
lwm2m10
device-management9
redis8
Programming languages (1)
Github contributions (5)
eclipse-leshan/leshan
Dec 2021 - Nov 2022
Java Library for LWM2M
Role in this project:
Back-end Developer
Back-end DeveloperContributions:37 reviews, 5 commits, 12 PRs in 11 months
Contributions summary:Jarek's contributions focused on improving error handling and core functionality within the Leshan Java library for LWM2M. They implemented better error management for SendData operations, added a "list" interactive command to the Leshan client demo, and addressed issues in SenML decoder's relative timestamp handling. Furthermore, they made modifications to the client's data sending mechanism by shifting timestamps from milliseconds to seconds and updating the Redis Identity key when the client IP address changes.
java-librarydevice-managementeclipseiotlwm2m-protocollwm2m-client
JaroslawLegierski/californium-test
Nov 2022 - Jun 2024
CoAP/DTLS Java Implementation
Contributions:14 pushes, 7 branches in 1 year 7 months
dtlstlsjava-apijavacoap
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