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A-J MΓ€ki, PhD

Data Engineer & Passionate Data Guy

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Here I list my personal hobby projects and briefly summarize some of my work-related projects; for my full work history, see πŸ‘‰πŸ› οΈ My Work Portfolio πŸ‘¨πŸ»β€πŸ’»πŸ‘ˆ.
For academic projects, see πŸ‘‰πŸ‘¨β€πŸ”¬ My Academic Portfolio πŸ”¬πŸ‘ˆ.

πŸ’» Own / Hobby Projects

See my public GitHub repositories.

🏠 Check smart relay status (repo)

Automated daily status checker for a Shelly smart relay β€” sends a push notification via ntfy.sh if the relay wasn’t active the previous day. Runs on a schedule with GitHub Actions.

πŸ—„οΈ DBML-SSOT: AI-assisted data architecture and visualization (repo)

Single source of truth: A data architecture described as code in one place β€” readable by a human, safe for an AI agent to maintain.

πŸ“„ Single-source CV (repo)

Keep the whole CV in one YAML file and generate everything from it: the website CV page and multiple tailored, multilingual PDF CVs (full, one-page, ATS-friendly, project-focused) built with Typst. Includes an internal variant with real client names, and a job fit analysis with a coding agent. My own Work Portfolio and resume are generated with it.

πŸŽ“ AI DP-700 CertAssistant (repo)

AI-powered study assistant for the DP-700 (Fabric Data Engineer Associate) certification. Agents.md with guardrails and Microsoft Learn Fabric MCP server.

πŸ“š LLM wiki

I have created two different LLM wiki templates that are maintained by an AI agent. A template for building a personal wiki. Another one is a template for academic researchers. The academic template is in real use for a narrative review paper on MEA analysis.

⚽ Kokoonpano-avustaja (repo | app)

Browser-based football team lineup planner β€” organize player positions and formations based on who’s available. No installation needed, runs directly in the browser.

⚽ Harjoitus-avustaja (repo)

Browser-based football practice planner. No installation needed, runs directly in the browser.

🍽️ Ruokasuunnittelija (repo | app)

Weekly meal planner for families β€” generates varied meal schedules, shopping lists, and recipe instructions. Works offline; optionally uses AI for meal suggestions.

✈️ Lupatodistus ulkomaanmatkalle (repo | app)

Fillable and printable guardian’s consent form for a child travelling abroad, based on the Finnish Ministry for Foreign Affairs guidance. Runs entirely in the browser; no data leaves the device.

πŸ” πŸ“ˆ DatAnalyzer (MATLAB repo | Python repo)

Data analysis tool for field potential signals, originally built with MATLAB. A Python version (with DuckDB export and HTML reports) is under development. More details here.

πŸ”¬ O2-measurement-tools (repo)

MATLAB tools for oxygen measurement experiments in Professor Pasi Kallio’s Micro- and Nanosystems Research Group at TUNI. Includes measurement, calibration, data cropping, plotting, and analysis scripts.

πŸ“ DocLaTex (repo)

Write LaTeX documents together with co-authors who use MS Word β€” combines PowerShell, Pandoc, LaTeX, Markdown. More details here.

🌑️ Plot Fluke Ti400 Thermal Images (repo)

MATLAB tool for plotting and analyzing thermal images from Fluke Ti400.


πŸ‘¨β€πŸ’» Work Projects

See full details in Project section in My Work Portfolio.

🏭 Data Engineering Services | Heavy Machinery (NDA)

πŸ“… Sep 2026 - Present
πŸš€ Role: Senior Data Engineer
πŸ› οΈ Tech Stack: Azure, Snowflake, Agile Data Engine (ADE)

🍏 Data Engineering Services | Food Industry (NDA)

πŸ“… Apr 2026 - Aug 2026
πŸš€ Role: Lead Senior Data Engineer
πŸ› οΈ Tech Stack: Microsoft Fabric, Azure DevOps

πŸ€– GenAI Platform | Siili (In-house)

πŸ“… Feb 2026 - Mar 2026
πŸš€ Role: Data & AI Engineer
πŸ› οΈ Tech Stack: Azure, Azure AI Search, Azure Data Factory, SharePoint

βš™οΈ GenAI Operational Accelerator | Solita (In-house)

πŸ“… Sep 2025 - Jan 2026
πŸš€ Role: Tech Lead / GenAI Solutions Architect
πŸ› οΈ Tech Stack: Azure, Azure AI Search, Azure DevOps

⚑ Data Engineering Services | Energy Sector (NDA)

πŸ“… Mar 2024 - Jun 2025
πŸš€ Role: Data Engineer
πŸ› οΈ Tech Stack: Databricks, PostgreSQL, Azure Data Factory

⚽ Data Engineering & Analytics | Football Association of Finland

πŸ“… Aug 2023 - Dec 2024
πŸš€ Role: Data Engineer & Data Analyst
πŸ› οΈ Tech Stack: Azure, Azure Data Factory, MySQL

πŸ›οΈ Developing Machine Learning Capabilities | Public sector organization in Finland (NDA)

πŸ“… May 2023 - Apr 2024
πŸš€ Role: Machine Learning Engineer and Data Scientist
πŸ› οΈ Tech Stack: Databricks, AutoML, Snowflake, SQL, Python & Spark


πŸ”¬ Academic Projects

More details here.

🧬 CoEBoC – Centre of Excellence in Body-on-Chip Research (2018 - 2025)

Academy of Finland funded project. My role: Postdoctoral Researcher and Vice-PI.

πŸ«€ Human Spare Parts (2011 - 2019)

Business Finland funded project. My role: Doctoral Researcher.


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