Lead Backend Engineer, Tonsser
€80-90k
Youth footballer performance app
Open for applications
Youth footballer performance app
21-100 employees
Open for applications
€80-90k
21-100 employees
Company mission
To empower every player to unlock their potential.
Role
Who you are
- We're not dogmatic about the stack, we're looking for someone who can help us decide what stays, what changes, and what comes next
- Significant experience as a senior or lead backend engineer, ideally with time spent owning architecture decisions in a production environment
- Deep comfort with at least one of Ruby, Python, Elixir, Go, or a similar modern backend language, and the judgement to know when language choice matters and when it doesn't
- Strong opinions on API design, data modelling, and system evolution
- Hands-on experience integrating AI/LLM capabilities into real products, or a strong, demonstrable interest in doing so
- Experience leading or mentoring other engineers
- Comfortable working remotely across European timezones
- Bonus: experience with consumer-scale mobile backends, GraphQL, or Kotlin Multiplatform
What the job involves
- You'll own the architecture of the Tonsser platform as we move into this next phase
- That means making the foundational technical decisions for a product used by a generation of athletes and setting the bar for how a small, ambitious team builds in 2026
- This is a hands-on lead role. You'll write code, shape the system, and set the technical direction
- You'll also help us level up as a team, particularly around how we adopt AI as a core part of how we build and what we ship
- Lead the architectural direction of our backend platform as we evolve from where we are today toward what's next
- Drive the technical roadmap for our new flagship project
- Set the standard for how the team works with AI, both in our development workflow and as a product capability
- Ship production code, review PRs, and mentor the engineers around you
- Partner closely with product, mobile, and design to turn ambitious ideas into things that actually work at scale
- Make pragmatic calls about what to keep, what to evolve, and what to rebuild
- Our current stack:
- Ruby monolith with a GraphQL API
- SQL (PostgreSQL)
- Hosted on Heroku
- Native iOS and Android apps, with the ambition to move to Kotlin Multiplatform
- Engagement: Open to starting as a freelance contract, with the clear intention of moving to a permanent role
Application process
- Send us a short note about what you've built, what you're looking for next, and why this caught your eye. We read every application
Our take
Tonsser is the largest football player app and community, empowering youth players to unlock their full potential, enabling them to track match stats and upload highlight reels, and providing players with the opportunity to be seen by recruiters and pro clubs.
Live in 10 countries and boasting a user base of 1.4 million players, the company created a showcase program called Tonsser United. This enabled its ever-changing roster of players to compete in tournaments (like the Vinci Cup) against noteworthy club teams such as Manchester City, Paris Saint-Germain, and FC Porto, with over 40% of the team’s alumni going on to sign with professional clubs.
Backed by a range of international investors and founders of companies including Spotify, Booking.com, and Peakon, the company has played a major role in decentralising football recruitment. Tonsser is well set to see continued growth as it leads the revolution of how young players are scouted.
Steph
Company Specialist at Welcome to the Jungle
Insights
Company
Funding (last 2 of 3 rounds)
Dec 2018
$6.3m
SERIES A
Jul 2017
$2.9m
SEED
Total funding: $11.2m
Company benefits
- 100% Work From Home Flexibility
- Healthy Lunch for the Office-Goers
- Trips to Watch Tonsser United Play
Company HQ
Frederiksberg
Leadership
Peter Holm
(CEO)Co-Founder of Event Fabrikken.
Simon Hjære Hansen
(CPO)Founder of Sidewalk Symphonies.
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