About Beautiful Sports

Beautiful Sports is a sports event organizer focused on building engaging and innovative competitive experiences.

We organize large-scale competitions such as:

• Brussels Cycling Festival (BCF)

• Belgian Beach Football League (BBFL)

To power these experiences, we built our own competition management and gamification platform used by:

• Sports event organizers to manage competitions

• Athletes to track rankings, results and progress

• Communities to engage with competitions digitally

The platform includes:

• an admin interface for organizers

• a backend/API in C# (.NET)

• a new mobile athlete app built in Flutter

This platform is not our core business, but it is a strategic digital layer enabling the experience, gamification and engagement around our sports events. Find out more about our app here.

We are now looking for a senior hands-on technical leader to take ownership of the platform’s technical direction and evolution.

Role

We are looking for a Senior Full Stack / Technical Lead (.NET) who is:

• extremely hands-on

• comfortable working directly in the code

• able to take ownership of an existing system

• able to move fast using modern AI-assisted development

This role is part-time or fractional and ideal for a senior engineer who enjoys working closely with founders and small teams.

You will help us stabilize, simplify and evolve our platform while dramatically improving development speed using AI-native engineering practices.

Your Mission

You will take ownership of the technical leadership of our platform and:

1. Understand and document the existing system

• Take over the current C#/.NET backend

• Understand the competition and gamification logic

• Document architecture and key flows

• Reduce knowledge dependency on individuals

2. Finalize and stabilize the API powering the mobile app

• Ensure the API is robust and scalable

• Support the release of the Flutter athlete app

• Fix bugs and edge cases efficiently

3. Improve development velocity

• Reduce friction in development

• Simplify architecture where needed

• Introduce pragmatic best practices

• Ensure small features can ship quickly without regressions

4. Introduce AI-native development practices

We strongly believe modern software teams must be AI-native.

You will be expected to leverage tools such as:

• LLM coding assistants

• AI code review

• AI-assisted debugging

• AI documentation generation

• AI test generation

to dramatically increase development speed and quality.

5. Act as technical lead for external developers

You may coordinate external developers and:

• clarify technical direction

• review architecture decisions

• guide implementation

• ensure quality

Tech Stack

Current stack includes:

Backend: C# / .NET

Admin web app: C# web stack

Mobile: Flutter

API: REST APIs connecting backend to mobile apps

Infrastructure: typical cloud-hosted architecture (to be reviewed and improved if necessary)

What We Are Looking For

Technical skills

Strong experience with:

• C# / .NET backend development

• API design and architecture

• debugging and maintaining existing systems

• database design

• production systems

Nice to have:

• experience with Flutter APIs

• experience with event-driven or gamification systems

• experience with sports tech platforms

Leadership skills

You should be able to:

• take ownership of a system quickly

• simplify complexity

• make pragmatic decisions

• balance speed and quality

• communicate technical topics clearly to non-technical founders

This is not a corporate role. We are looking for someone who loves writing code.

Bonus Points

• interest in sports, cycling or football

• experience with competition platforms

• interest in gamification and athlete engagement

Working Model

Flexible collaboration model:

Possible formats:

• Tech Lead / Senior Engineer (part-time)

• Freelance collaboration

Location: Belgium, remote-friendly.

Why This Role Is Interesting

You will:

• take ownership of a real product used by thousands of athletes

• work directly with founders

• shape the technical future of a sports platform

• experiment with AI-native development workflows

• have strong autonomy and impact

How to Apply

Please include:

• a short introduction

• examples of systems you have taken over or improved

• the AI tools you actively use in development

• your preferred collaboration model (fractional / freelance / part-time)