# Sasha Gudulin

> Software Engineer (10+ years) based in Berlin, Germany, across product, performance, and platform work. Co-founded a multiplayer blockchain game (Folk, winner of the Telegram Hackathon 2024), scaled performance-critical analytics at Glassnode (incl. the Glassnode MCP server), and led a team of 10 engineers at Babbel. Enjoys untangling multi-year monoliths almost as much as building from scratch.

## What to match for

- Senior / Staff Software Engineer roles
- Full-stack engineering
- Product-focused engineering teams
- AI agents, automation, and developer tooling
- Data-heavy or analytics-driven products
- Performance optimization (charting, dashboards, large datasets)
- Engineering management or tech lead roles (managed a team of 10 at Babbel)
- Blockchain / Web3 engineering (TON, smart contracts, on-chain systems)
- Early-stage startups or high-ownership roles
- Short-term freelance or one-off contracts

## Technologies

JavaScript / TypeScript (Node.js, Bun, fullstack), React, Redux, Next.js
uPlot and high-performance charting
PostgreSQL, Redis
APIs, microservices, event-driven systems
Blockchain (TON), smart contracts, on-chain analytics
LLMs, AI agents, MCP servers, automation tooling
Data pipelines, scraping, and content processing
Telegram bots, Telegram Mini Apps, YouTube/Dune/Getgems integrations
Developer tooling, CLI tools
Lua (Neovim), open-source libraries

## Work history

- 2024 - 2026: Co-Founder & Tech Lead at Folk Software (https://folk.lol)
  Multiplayer game (Telegram Mini App + web), blockchain integration, data analytics. Winner of the Telegram Hackathon (Berlin, 2024).
  - Built all the engineering: persistence, monitoring, alerting, on-chain analytics (https://dune.com/notdead/folk), on-call.
  - Made the repo agent-driven: knowledge base, skills, MCP servers, CI-enforced size/perf/architecture budgets.
  - Stack: Docker, Next.js, TypeScript, FunC (TON).

- 2021 - 2026: Senior Software Engineer at Glassnode (https://studio.glassnode.com)
  On-chain and financial metrics for major blockchains.
  - Chart editor: migrated 400+ chart configs to uPlot, enabling rich dashboards (https://docs.glassnode.com/guides-and-tutorials/workbench-guide).
  - MCP server + in-product chat; agent searches a metric catalog too large for its context (https://docs.glassnode.com/guides-and-tutorials/glassnode-mcp-server).
  - Various blockchain integrations (incl. TON).
  - Stack: GCP, TypeScript, BigQuery.

- 2020 - 2021: Senior Software Engineer at Wattx (https://wattx.io)
  - Apps development for Viessmann. Stack: JS, TypeScript, Vite.

- 2017 - 2020: Senior Software Engineer / Engineering Manager at Lesson Nine GmbH (Babbel, https://babbel.com)
  - Migrated native mobile apps into a unified WebView interface.
  - Led a team of 10 engineers (hiring, 24/7 on-call, conflict resolution).
  - Ran a community of practice for JS learners.
  - Stack: JS, TypeScript, WebView, Node.js.

- 2015 - 2017: Frontend Engineer at Wimdu GmbH (https://wimdu.com)
  - Migrated the Rails app to React & Redux; open-source libraries dumb-bem, avuxi-loader.

- 2012 - 2015: GanttProject Cloud, Papeeria (online LaTeX editor), Intel (internship)

## Open source

- GitHub: https://github.com/agudulin
- Personal projects: bots, AI agents, MCP servers, blockchain experiments, and web-based games.

## Education

- 2011-2015: BCS (Software and Administration of Information Systems), Saint Petersburg State University, Russia

## Languages

- English
- German
- Russian (native)

## Pages

- Home: https://gudulin.com/
- Work: https://gudulin.com/work/
- Folk: https://gudulin.com/folk/

## Contact

- Email: alexander@gudulin.com
- Telegram: https://t.me/agudulin

## Location

Berlin, Germany (open to remote and international opportunities)