Hi, I'm Oscar.
Full-stack software engineer, specialising in front-end development. I do TypeScript, React, Svelte, the modern web, and I have the range to own a feature end-to-end: data model, API, UI, and the dashboard that watches it after launch. Currently leading a frontend team in Stockholm.
5+ years in industry 15+ years building software
A few things I've built, selected work.
A 3D office wayfinder in the browser
Interactive multi-floor office map rendered with Three.js. Pick a meeting room and an A* pathfinder traces the route through corridors and stairwells onto the floor; inactive floors fade and slide apart vertically so a path that crosses levels stays legible. Waypoint graphs and floor outlines live in JSON with an in-app debug editor for placing nodes against the real .obj models.
A recreation of the Vercel-conf lanyard
A port of the Vercel-style 3D lanyard component to Svelte + Threlte + Rapier. The interesting parts were keeping the physics stable across resizes, taming the constraint solver under fast drag, and getting it under the perf budget for an always-visible hero element. (It's the thing dangling at the top of this page.)
A native macOS email client for Gmail
A lightweight desktop email client built with SwiftUI that connects to Gmail via the Google API. Features a three-column layout inspired by Apple Mail with a sidebar for label navigation, an email list with read/unread indicators and infinite scroll, and a detail pane that renders full HTML emails. Supports composing, replying, archiving, and label management.
Take-home, full-stack PoC
A restaurant discovery frontend built end-to-end for a take-home interview. Next.js with SSR/ISR, Payload CMS backed by Postgres, and full production scaffolding: Storybook, Jest, GitHub Actions.
Client work
A personal portfolio I built for a client. The interesting work wasn't the stack, it was translating "I want it to feel like this" into components, scoping ruthlessly, and shipping something she can edit herself through the CMS.
Tinder for Magic: The Gathering
Tinder for Magic: The Gathering. Cards stream in via the Scryfall API; swipe right to add to a deck, left to skip. Built over a weekend to learn React and the NextUI library.
Where I've worked, a condensed timeline.
Umain AB· Stockholm, Sweden
2025 — Present
Led frontend development and architecture, onboarded engineers, and worked closely with product stakeholders to take an early-stage fintech product to a production MVP in roughly seven months.
Klarna· Stockholm, Sweden
2023 — 2025
Worked across debt collection systems and independently led an internal service tool that reduced manual intervention and inter-team response time.
Spotify· Stockholm, Sweden
2022
Skry· Stockholm, Sweden
2022 — 2023
Kungliga Tekniska Högskolan· Stockholm, Sweden
2020 — 2023
Special Elektronik· Karlstad, Sweden
2017 — 2018
Skills, languages, tools, and frameworks I reach for.
React
Next.js
Svelte
SvelteKit
Vue
Node.js
Three.js
Threlte
Sanity
Payload CMS
Tailwind CSS
Vite
Jest
Playwright
React Native
Unity
Unreal Engine
Git
Docker
GitHub Actions
AWS
Vercel
Auth0
Sentry
Datadog
BigQuery
Kibana
Kafka
GraphQL
MCP
PostgreSQL
MongoDB
CI / CD
TypeScript
JavaScript
Java
Kotlin
C++
Swift
Python
SQL
UI/UX Design
Adobe Photoshop
Blender
Substance Painter
A few things I keep coming back to.
Every layout, animation, and microcopy decision should serve the reader. I push back on flourish that doesn't earn its place.
Bundle size, time-to-interactive, and animation cost are part of the design brief — not an afterthought once the product is shipped.
Keyboard navigation, contrast, and reduced-motion fallbacks aren't a separate pass. They're part of the first pull request.
From people I've worked with.
"Oscar's analytical skills are sharp and effective, and his meticulous approach to problems allowed him to make a number of key recommendations that resulted in an improved product. Beyond the engineering, he's a thoughtful team player — open to discussion, able to receive criticism, and a positive force across the department."
"It's people like Oscar who set the culture for us at our company. He takes initiative, responds to feedback, and adjusts toward something even better. He is energetic and thoughtful in equal measure."