Available for new opportunities

Hi, I'm Håkan Nylén👋

I am a Crystal, Python, Ruby, and JavaScript/TypeScript developer with deep expertise in Node.js and Redux for both frontend and backend development, based in Stockholm, Sweden. I have been working as a developer since 2014, with a passion for learning new technologies and solving problems.

Stockholm, Sweden 🇸🇪

Skills

Primary Technologies

CrystalRubyReactNext.jsRailsPythonNode.jsBun

Backend & Databases

PostgreSQLMySQLRedisMongoDBClickHouseElasticsearch/OpenSearchDynamoDBREST APIGraphQL

Frontend

JavaScriptTypeScriptReduxReact QueryViteTailwindCSSSCSS/CSSHTML5Highcharts

DevOps & Tools

GitDockerCI/CDAWSHerokuGitHub ActionsCircleCI

Testing

RSpecPHPUnitVitestJestCapybaraSelenium

Explored Technologies

GoRustElixir

Technologies I've experimented with

Work Experience

15+ years

Trice

Ruby on Rails Developer
2024 – 2025

Errordeck

Founder
2022 – 2025

Tendable

Fullstack Developer
2022 – 2024

Beatly

CTO
2021 – 2022

Kindmetrics

Founder
2020 – 2021

Beatly

Tech Lead
2016 – 2021

Fyndiq

Integration Developer
2014 – 2016

Klarna

Tech Support
2013 – 2014

Dirble

Founder
2011 – 2019