Hi, I'm Miroslaw Steblik
I'm a data engineer working on data pipelines. I build things with Python, Polars, and dbt, and I run a homelab to break things on purpose so I don't have to break them by accident at work.
"I build the data infrastructure that teams rely on when the numbers actually matter — pensions, fund performance, regulatory reporting. The kind of work where "probably right" isn't good enough."
Skills
Data Engineering
Infrastructure
What I do
My day job is turning messy financial data into reliable, queryable datasets. That means ingestion, transformation, modelling, monitoring, and analytics.
Expertise
Data infrastructure
Greenfield builds and legacy modernisation. Databricks, dbt, PostgreSQL, Docker. I architect from scratch and hand over something the team can actually maintain.
Pipeline engineering
Reliable ingestion, transformation, and delivery pipelines using Python, Polars, and dbt. Tested, monitored, and documented — not "it works on my machine".
Track record
-
Sep 2024 — Present
Data Engineer
Mercer Ltd · London
- Built the data infra from zero. Designed a Databricks-based data platform from scratch, with deployment tooling and CI/CD via self-hosted GitHub Actions runners.
- dbt pipelines the finance team trusts. Built dbt pipelines feeding management-information reports for senior stakeholders — tested, monitored, and reproducible.
- Python CLI replacing scripts. Replaced a chain of manual reporting steps with a single Python CLI command.
- Tooling. Built internal monitoring and tracking tools that gave an analytics team meaningful capacity back.
-
Aug 2021 — Aug 2024
Data Analyst
Mercer Ltd · London
- Automated the manual stuff. Python scripts replaced repetitive MI reporting processes.
-
Nov 2017 — Jul 2021
Data Management Analyst
Bloomberg LP · London
- Fixed Income database. Worked on the end-to-end data lifecycle for a Bloomberg fixed- income securities database used by Bloomberg Terminal subscribers globally.
Elsewhere
Find me on GitHub, or drop me a line at data@steblik.com.