Filip Bielejec
Senior Engineer -- Data & Analytics
Lodz Metropolitan Area Poland
Summary
👤
Senior🎓
Top SchoolFilip Bielejec is a senior data and analytics engineer with 15 years of experience who specializes in turning messy blockchain and event data into production-ready datasets and actionable analytics. He has spent the last five-plus years in crypto building end-to-end pipelines—from S3/Kinesis ingestion and Glue ETL to BigQuery transformations over Bitcoin’s full UTXO set (897M+ addresses) and a PostgreSQL knowledge graph with full lineage for compliance and portfolio analytics. His PhD work at KU Leuven in GPU-accelerated statistical computation taught him to design careful multi-dimensional, time-aware data models and to squeeze performance out of large-scale compute, a mindset he applies to on-chain attribution and behavioral feature engineering. Equally comfortable in Rust, Python, SQL and PySpark, he pairs deep pipeline craftsmanship (schema design, incremental processing, observability, Parquet versioning) with applied ML experience—autoencoders, collaborative filtering, RAG and vector search—to bridge analytics and AI. An active open-source and crypto contributor (notably to district0x/ethlance and Aleph Zero components), he brings a rare blend of academic rigor and production-first engineering to analytics roles in web3. Based in Łódź, Poland, he’s currently building AI-powered compliance and similarity-search platforms for cross-chain asset management.
15 years of coding experience
8 years of employment as a software developer
Doctoral Training in KU Leuven, Biomathematics, Bioinformatics, and Computational Biology, Doctoral Training in KU Leuven, Biomathematics, Bioinformatics, and Computational Biology at KU LeuvenMaster of Statistical Data Analysis, Statistics, Master of Statistical Data Analysis, Statistics at Ghent UniversityMaster in Mathematical Methods in Computer Science, Computational and Applied Mathematics, Master in Mathematical Methods in Computer Science, Computational and Applied Mathematics at Technical University of Lodz
Stackoverflow
3,600reputation
438kreached
10answers
38questions
Github Skills (32)
docker10
scripting10
clojure-cli10
dockers10
wpgraphql10
cicd10
clojure10
automation10
script10
web3js10
wordpress-graphql10
graphql10
sh10
automations10
shell10
Programming languages (16)
Github contributions (5)
district0x/ethlance
May 2019 - Oct 2020
Ethlance is the first job market platform built entirely on the Ethereum blockchain. Free to use forever!
Role in this project:
Full-stack Developer & DevOps Engineer
Full-stack Developer & DevOps EngineerContributions:3 reviews, 35 commits, 33 PRs in 1 year 5 months
Contributions summary:Filip significantly contributed to the project's infrastructure by implementing a deployment pipeline, likely using Docker, and shell scripting, as evident in the `docker-push.sh` script. They refactored the codebase to utilize Infura, a web3 service, for server-side blockchain interaction. Additionally, the user worked on implementing GraphQL resolvers and integrating the UI with a social sign-up flow, demonstrating a focus on both backend and frontend development.
ethereumblockchaindistrictsolidityjob
phylogeography/spread
Mar 2023 - Mar 2023
Spread visualizes how viruses and other pathogens are spreading in time and space. It creates compellable shareable, interactive and time-animated visualization.
Contributions:130 reviews, 1 commit, 144 PRs in 1 day
visualizationreactvisualizesanimateddata-science
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