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Hi! I'm Jens Tinfors, a senior fullstack developer based in Sweden with 25+ years of experience building production systems — from startups to platforms used by millions.
My core expertise is React, Next.js and JavaScript, as well as mobile development with SwiftUI and Jetpack Compose. A strong sense of ownership and curiosity for the full product consistently draws me across the entire tech stack (see Curriculum Vitae below).
I prioritize pragmatic, maintainable solutions that deliver value quickly. End-user outcomes matter more than technical elegance for its own sake. I also believe a collaborative, high-energy team culture is just as important as the technical work itself.
Random fact about me: I hold a Journeyman's Certificate in fine woodworking 👨🔧 🪑
Leadership & Responsibilities
- Technical lead and consultant roles across multiple organisations
- Product owner of internal A/B testing platform (SVT)
- Full lifecycle development — backend, frontend, and mobile
- Cross-functional collaboration across design, product, and engineering
Available for consulting engagements — let's talk.
Curriculum Vitae
SVT Play
App developer of SVT Play, leveraging AI as an integrated part of the development workflow. Product owner of internal A/B testing tool. Tech stack includes but is not limited to: iOS development using SwiftUI, Android development using Jetpack Compose.
- span
- 2025 - (ongoing)
SVT Barn
Senior fullstack developer at SVT Barn for 7+ years, building streaming features for one of Sweden's most-used children's platforms. Product owner of an internal A/B testing tool adopted across SVT. Stack: React, CSS Modules, Akamai, iOS (Swift), and Android (Kotlin).
- span
- 2017 - 2024
Beamon People
Technical consultant and team lead, driving delivery across client engagements.
- span
- 2016 - 2017
HIOT Labs / Polygongroup
Full system ownership at an IoT startup — designed and built an end-to-end platform for detecting water leaks and preventing property damage. Covered the entire stack: time-series databases, APIs, web app, and iOS/Android apps via React Native. Node.js, React, socket.io.
- span
- 2016
Hemnet
Replaced a legacy data visualisation product with a custom solution, delivering statistical property data to users via Chart.js, React, CSS Modules, and Ruby on Rails.
- span
- 2016
Viaplay
Built and maintained frontend and backend systems for one of Scandinavia's leading streaming platforms. Node.js, JavaScript, CSS.
- span
- 2014 - 2015
Kungliga Biblioteket (Royal Swedish Library)
Built the internal Libris CMS and supporting web apps for Sweden's national library. Python, Flask, Django.
- span
- 2013
Antagning.se
Rebuilt Sweden's national university admissions platform from the ground up. Java, JavaScript, CSS.
- span
- 2012
SLL (Stockholm Healthcare)
Commissioned for a pre-study; delivered a fully working realtime collaboration web app instead. Ruby on Rails, weekly sprint cadence with stakeholder demos.
- span
- 2011
Linnaeus University
Built and maintained the public website, intranet, and student platform for Linnaeus University across a broad technology stack: Ruby on Rails, Java/Spring, JavaScript, CSS, MySQL, hosted on Ubuntu servers.
- span
- 2007 - 2011
Ericsson
Seven-year tenure spanning developer, tester, team lead, and sourcing engineer roles. Delivered custom hardware and software solutions for global customers, including international on-site installations.
- span
- 1999 - 2007