Résumé

Performance-minded software engineer Updated May 30, 2026

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Robert Kirsammer

Performance-minded software engineer · rokirsammer@gmail.com · github.com/x1f4r · robert-kirsammer.com

Summary

Engineer focused on web performance and lean, durable infrastructure. I move the numbers that decide whether a product feels fast — LCP, INP, p99 — and keep the running cost honest. Comfortable owning a stack end to end, from Rust services behind typed APIs to a SvelteKit front end and the box it runs on.

Experience

Independent engineering work

  • Build and document small, durable web systems with strict performance and cost budgets.
  • Shape content-heavy front ends around prerendering, typed content ingestion, and minimal JavaScript on the critical path.
  • Use Rust services, OpenAPI contracts, and generated TypeScript clients when a dynamic backend is worth the operational cost.

Skills

Languages: TypeScript, Rust, SQL. Front end: SvelteKit, Svelte 5 (runes), Tailwind, CSS design systems. Back end & infra: axum, tokio, Postgres, Bun, Cloudflare, systemd, Litestream. Practices: Core Web Vitals budgets, tracing/observability, DR drills, typed end-to-end contracts.

References

Available on request.