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Hi! I'm Jens Tinfors, an AI developer based in Sweden. I spent 25+ years as a senior fullstack developer building production systems, from startups to platforms used by millions. Today I focus on building with AI and putting it to work in real products and development workflows.
My background is in React, Next.js and JavaScript, as well as mobile development with SwiftUI and Jetpack Compose. That full-stack experience is what I bring to AI work: knowing how to turn a promising model into a reliable, shippable product. A strong sense of ownership and curiosity for the full product still 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