00Rasmus Josefsson · Staff Software Engineer
Currently at Outreach on the Admin Experience team, building AI into our internal product platform. Previously shipped UI at Microsoft Teams, Skype, and Trivago.
On the Admin Experience team at Outreach, shipping features into the platform, building AI into it, and operating across teams in close partnership with PMs and designers. On the side, building an agentic end-to-end testing approach.
Contributor · Outreach
An internal AI platform the team is building at Outreach: a company “brain” that grounds the company's AI agents in the live product and the business around it, pulling in context from across the org. Also includes code-to-Figma and Figma-to-code tooling, a Slack integration, and a PRD creator. In active development.
Architect & primary author · Outreach · 2023–
A floating, dockable developer panel used daily across Outreach engineering. Plugin-based architecture so any team can extend it; ships with feature-flag, GraphQL, and Apollo tooling out of the box.
Agentic, deterministic end-to-end testing
Record a browser session with an LLM from the CLI, then replay it deterministically against any identity profile and diff what changed. Built for the gap between unit tests and full E2E suites, and for a generation of AI-driven development that needs something better than either. CLI-first, with a web UI in the works.
Local-first macOS voice transcription and dictation
Global-hotkey dictation, file transcription with word-level timestamps, and speaker diarisation, exposed via both CLI and GUI. All inference runs on-device via Apple’s Neural Engine.
1M-token context on GitHub Copilot
OpenCode plugin that exposes 1M-token long-context variants of Claude Opus / Sonnet and GPT-5 on GitHub Copilot, by hooking the provider’s model list and overriding client-side budget metadata.
Staff Software Engineer · Outreach
Admin Experience. Skainet AI platform, Outreach DevTools, admin portal, CRM Sync, licensing. Promoted from Senior in 2022.
Software Engineer II · Microsoft
Virtualised list UI in Microsoft Teams during its ~20M → 115M DAU growth; Skype Web Control inside Outlook.
Software Developer · Trivago
Hotelier CRM: AngularJS → TypeScript/React migration and list virtualisation for large datasets.
Rasmus Josefsson is a Staff Software Engineer who builds production-grade frontends and the AI-native developer tools around them. At Outreach, he's on the Admin Experience team and a driving force behind its push to bring AI into the company's internal product platform. Earlier, he shipped the virtualised list UI at Microsoft Teams, serving tens of millions of daily users, and built Skype Web Control inside Outlook. Before that, he led the AngularJS-to-React migration of Trivago's hotelier CRM. He works at the seam where frontend architecture meets AI tooling, turning ambiguous platform problems into systems other engineers build on.
Building something ambitious? Let's talk.
Remote from Sweden (CET) · open to Staff-level frontend & AI-tooling work.
josefssonrasmus@gmail.com