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

14+ years

Trice

Ruby on Rails Developer
20242025

Errordeck

Founder
20222025

Tendable

Fullstack Developer
20222024

Beatly

CTO
20212022

Kindmetrics

Founder
20202021

Beatly

Tech Lead
20162021

Fyndiq

Integration Developer
20142016

Klarna

Tech Support
20132014

Dirble

Founder
20112019