# Mikael Rinne

> Full-stack software engineer based in Stockholm, Sweden. 1st Founding Engineer at Ivy
> (a .NET AI startup) and Founder & CEO of SpaceCorps Technology OÜ. Works primarily in
> C#/.NET, TypeScript/React and Rust, with a research background in machine learning,
> chemistry and physics. GitHub handle: rorychatt.

Canonical page: https://rorychatt.github.io/rorychatt/
Contact: mikael@spacecorpstechnology.com

## Summary

- **Current role:** 1st Founding Engineer at Ivy (2025 – now, Stockholm). Owns the codebase,
  product engineering, AI modelling and project planning; leads the development team.
  Ivy is raising a $5M seed round.
- **Company founded:** SpaceCorps Technology OÜ (2023 – now). Open-source 3D MMO RPG that runs
  in the browser; team of six; launching summer 2026.
- **Previous:** Solutions Architect / Senior Full-stack Engineer at Scania (2024–2025);
  Full-stack Software Engineer at Nixor EE AS (2023–2024); Full-stack Software Engineer &
  Researcher at University of Tartu Institute of Technology (2022–2023); private tutor in
  the natural sciences (2019–2024).
- **Research:** First author of "An Online Tool for Thermal-Field Emission Calculations from
  Metal and Semiconducting Emitters", IEEE IVNC 2023 — doi:10.1109/IVNC57695.2023.10188950.
- **Education:** Full-stack C# Developer, SALT School of Applied Technology (2024).
  Chemistry studies at University of Tartu (2019–2024, did not graduate — left to build
  software full time).
- **Languages:** English (native), Estonian (fluent), Russian (fluent).
- **Git history:** 25,000+ GitHub contributions since January 2023 across public, private and
  organisation repositories. Primary languages by commit volume: C#, TypeScript, Rust.

## Technical focus

- **Languages:** C#, TypeScript, Rust, JavaScript, Python, SQL, WGSL/GLSL, PowerShell/Bash,
  C/C++, Java, Fortran, Assembler, MATLAB, Dart
- **AI engineering:** RAG pipelines, embeddings and vector search, agentic tooling, MCP,
  Anthropic and OpenAI APIs, Microsoft.Extensions.AI, Semantic Kernel, Qdrant/pgvector,
  structured output and tool calling, prompt and eval harnesses
- **Backend:** .NET 9, ASP.NET MVC/WebAPI, Entity Framework Core, SignalR, PostgreSQL, Dapper,
  .NET Aspire, Node.js, FastAPI, SQL Server, Redis, ANTLR
- **Rust & systems:** Tokio, serde, Cargo workspaces, axum, tracing, crossbeam, criterion,
  proptest, redb/bincode, Tauri, binary protocols, lock-free concurrency
- **Frontend:** React 19, Tailwind, Radix UI/shadcn, Vite, WebGL/three.js, WebGPU, TanStack,
  CodeMirror, ECharts, Framer Motion, Apache Arrow, Angular
- **Scientific computing:** neural networks, XGBoost, Monte-Carlo simulation, Gaussian
  approximations, molecular dynamics, TensorFlow, NumPy/SciPy, COMSOL, Modelica
- **Practice:** TDD/SOLID, CI/CD, GitHub Actions, Playwright, Docker, xUnit, Vitest/Jest,
  Kubernetes, AWS/Azure, mob programming, Agile

## Pages

- [Portfolio (single page)](https://rorychatt.github.io/rorychatt/): full CV, ranked projects,
  three-year contribution heatmap, reverse-chronological repository timeline, experience,
  education and toolkit. Content is server-served static HTML; the project, heatmap and
  timeline sections are rendered client-side from `assets/data.js`.
- [Source repository](https://github.com/rorychatt/rorychatt): the site itself, plus
  `scripts/build-data.py`, which regenerates the git data from the GitHub GraphQL API.

## Notable projects

- [Ivy Framework](https://github.com/Ivy-Interactive/Ivy-Framework) (C#, 434★): framework for
  building internal tools with LLM code generation; front-end and back-end in one C# codebase.
- [Ivy Tendril](https://github.com/Ivy-Interactive/Ivy-Tendril) (C#, 198★): developer tool for
  an agentic era, where agents write most of the code.
- [SpaceCorps 2](https://github.com/rorychatt/SpaceCorps2) (TypeScript): WebGL 3D MMO RPG,
  client and server.
- [GETELEC](https://github.com/AndKyr/GETELEC): thermal-field emission calculation tool behind
  the IVNC 2023 paper.

## Links

- [GitHub](https://github.com/rorychatt)
- [LinkedIn](https://www.linkedin.com/in/mikael-rinne/)
- [Ivy](https://ivy.app)
- [SpaceCorps Technology](https://spacecorpstechnology.com)
- [IVNC 2023 paper (DOI)](https://doi.org/10.1109/IVNC57695.2023.10188950)