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Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: YOLOAchievement: Public SponsorAchievement: Arctic Code Vault Contributor

Achievements

Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: YOLOAchievement: Public SponsorAchievement: Arctic Code Vault Contributor

Organizations

@sebastian-software

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fastner/README.md

Sebastian Fastner

React and TypeScript consultant helping product teams build and improve maintainable web applications.

Available now for multi-month, fully remote projects: 40 hours/week, with collaboration across Europe and the US and overlap until 22:30 German time.

Focus

  • React, TypeScript, React Router, and Vite
  • Internationalization and accessible frontend architecture
  • Testing with Vitest and Playwright
  • Open-source tooling and AI-assisted engineering workflows

Selected team work and collaborations

  • Relanto — self-hosted transactional email infrastructure built with React and TypeScript, including scoped API access, delivery tracking, retries, and operational tooling
  • Palamedes — i18n tooling for React, TypeScript, Vite, and Next.js
  • Stellara — self-hosted TypeScript gateway for MCP clients, web research, browser automation, and vector memory
  • Effective Flow — end-to-end engineering workflows for Claude Code and Codex, from planning and implementation to review and merge
  • Sebastian Software Standards — repository automation and engineering standards
  • AI Agent Skills — reusable engineering and delivery workflows
  • Open Source at Sebastian Software — overview of current open-source projects

Contact

Project profile · Arc profile · Email

Pinned Loading

  1. sebastian-software/eslint-config-setup sebastian-software/eslint-config-setup Public

    Pre-generated ESLint flat configs for TypeScript & React — 25 plugins, AI mode, OxLint-ready. One import, zero runtime overhead.

    TypeScript 2 1

  2. sebastian-software/palamedes sebastian-software/palamedes Public

    Next-generation i18n tooling powered by OXC — fast macro transforms, message extraction, and framework adapters for Vite & Next.js

    Rust 1

  3. sebastian-software/skills.sebastian-software.com sebastian-software/skills.sebastian-software.com Public

    Practice-built skills that give AI agents practical judgment for product, web, engineering, delivery, go-to-market, communication, and compliance work.

    Python 1

  4. sebastian-software/standards sebastian-software/standards Public

    Repository standards for the org — reference files, migration changelogs, agent instructions and a CLI to check and apply them

    TypeScript

  5. sebastian-software/relanto sebastian-software/relanto Public

    Relanto helps teams send application emails reliably with managed SMTP configs, scoped API tokens, delivery tracking, and an admin UI for secure operations.

    TypeScript

  6. sebastian-software/stellara sebastian-software/stellara Public

    Self-hosted AI tool gateway for Firecrawl, Exa, Qdrant, embeddings, browser automation, and MCP clients.

    TypeScript