Sebastian Jonasson
Software Developer at YourSix
Malmo, Sweden
Summary
👤
Senior🎓
Top SchoolSebastian Jonasson is a pragmatic full-stack software developer with 11 years of experience building web applications and APIs from Malmö, Sweden. He has evolved from front-end JavaScript and AngularJS work into backend development and tech leadership, with hands-on experience in Clojure, Node.js, Rust, MongoDB, SQL, Docker and AWS. As Tech Lead at Timezynk he combined architecture, code review and team education—running workshops and coaching developers while steering the tech stack forward. He’s comfortable owning projects end-to-end, having been the sole developer on SaaS initiatives and led migrations from PHP to modern JS stacks. Currently at YourSix he continues to ship and maintain production systems while keeping developer experience and infrastructure up to date. Outside day-to-day work he shares knowledge through Stack Overflow and GitHub activity, reflecting a developer who balances practical delivery with continuous learning.
11 years of coding experience
8 years of employment as a software developer
Bachelor's degree, System Development, Bachelor's degree, System Development at Malmö högskola / Malmö University
Swedish, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (69)
api-platform10
go-language10
api-client10
websocket10
proto10
http-client10
state-machine10
rest-api10
api10
rest10
golang10
grpc10
api-design10
insomnia10
angularjs10
Programming languages (8)
Github contributions (5)
sebastianjonasson/insomnia
May 2020 - May 2023
Leading Open Source API Client, and Collaborative API Design Platform for GraphQL, and REST
Contributions:4 PRs, 30 pushes, 9 branches in 3 years 1 month
api-clientapigraphql-apirestgraphql
sebastianjonasson/fb-page-auto-liker
May 2015 - Feb 2017
Contributions:5 commits, 3 pushes, 1 branch in 1 year 9 months
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