Curriculum vitae

The Record of Deeds

Clean, scannable, and print-friendly — hit the button and it becomes a sober one-pager, no dragons attached.

Jón Agnar Stefánsson

Full-stack developer

Reykjavík, Iceland
jon@jonnxor.is · jonnxor.is
github.com/jonnxor

Profile

Full-stack developer with 10 years of experience designing and shipping web platforms end to end. Strong in TypeScript, Go, and React; known for clear technical writing, calm incident response, and finding the lateral solution. Trilingual-in-progress (Icelandic, English, Japanese).

Experience

2022 — now

Senior Full-stack Developer · Straumur Pay

  • Led rebuild of merchant dashboard (React + Go) serving 40,000 merchants; p75 load time down 70%.
  • Designed event-driven settlement pipeline processing 2M transactions/day on Postgres + NATS.
  • Introduced ADR practice and incident postmortem culture; support tickets halved in one year.
2019 — 2022

Full-stack Developer · Nordsky Software

  • Built booking and logistics systems for Icelandic tourism operators (Node, TypeScript, PostGIS).
  • Shipped offline-first mobile web client used by guides in zero-signal highland routes.
2016 — 2019

Web Developer · RVK Studio

  • Delivered 30+ client sites and web apps; owned everything from CMS modeling to deployment.

Skills

Languages TypeScript, Go, Python, SQL
Frontend React, Next.js, CSS architecture, a11y
Backend Node, Go services, Postgres, Redis, NATS
Infra Docker, GitHub Actions, Grafana, AWS
Practices ADRs, testing strategy, incident response
Writing Docs, postmortems, long-form technical blog

Education & languages

2012 — 2015

BSc Computer Science · University of Iceland

Icelandic (native) · English (fluent) · Japanese (JLPT N4, climbing)