Mikael Koli
Data Engineer
Espoo, Finland
Summary
🤩
Rockstar🎓
Top SchoolMikael Koli is a Data Engineer with eight years of experience combining finance, technology and analytics to deliver reliable, production-grade data solutions. He has progressed from middle-office PnL and valuation roles at OP Financial Group into engineering positions at Zalando and ŌURA, applying domain knowledge to data pipeline design and operational tooling. An active open-source maintainer, Mikael is the creator and primary contributor to Rocketry, a modern Python scheduling library focused on robust task loading and test coverage. His background in strategic finance and business analytics gives him a practical edge in translating regulatory and trading requirements into auditable data systems. Based in Espoo, Finland, he brings hands-on Python proficiency and a track record of extracting insight from large, messy datasets—skills first honed during analytic projects at Fortum and the Finnish Transport Agency. Colleagues rely on him for pragmatic automation that reduces manual risk while improving observability across data workflows.
8 years of coding experience
6 years of employment as a software developer
Bachelor of Business Administration (BBA) International Business Administration, Bachelor of Business Administration (BBA) International Business Administration at University of TwenteMatriculation examination General knowledge, Matriculation examination General knowledge at Kuninkaantien lukioMaster's degree Strategic Finance and Business Analytics, Master's degree Strategic Finance and Business Analytics at LUT University
Finnish, English, Swedish, German
Stackoverflow
2,961reputation
1.8mreached
73answers
5questions
oop
top-5%
fastapi
top-5%
python
top-5%
Github Skills (16)
automation10
automations10
python10
yaml10
pytest9
testing9
e-mail9
fastapi9
oop9
multiprocessing6
datetime6
tkinter6
pydantic6
timedelta6
queue6
Programming languages (4)
Github contributions (5)
Miksus/rocketry
Jun 2019 - Dec 2022
Modern scheduling library for Python
Role in this project:
Back-end Developer & Automation Engineer
Back-end Developer & Automation EngineerContributions:10 releases, 15 reviews, 1705 commits in 3 years 6 months
Contributions summary:Mikael primarily contributed to the modernization and improvement of the rocketry scheduling library. The commits show a focus on refining the task loading mechanisms within the Python project, including updates to YAML loaders and their corresponding functionalities, such as handling dictionaries of tasks, with a core focus on reliability and structure. Furthermore, code changes included enhancements related to core modules and general task scheduling. The user also demonstrates testing skills by adding tests to support the updated features.
pythonschedulingpydanticschedulerframework
Miksus/scriptor
Nov 2022 - Nov 2022
High-level abstraction for command-line
Contributions:63 commits, 5 PRs, 36 pushes in 6 days
command-line-toolunicornshigh-levelsubprocessreadline
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