Senior Unity Developer (Mobile )

Senior Unity Developer (Mobile & Gameplay) 

Location: Manchester / London (Hybrid) or fully remote
Type: Full-time

About us

Rezzil builds performance products across B2B, B2C and gaming for sport, spanning mobile, VR and console. Our technology is used by elite teams and organisations to train, analyse and engage athletes and fans. 
 
exar.live is our ingest and data transport platform for live game data, powering real-time analysis tools across mobile, VR and broadcast. Together, we’re building a connected ecosystem of products driven by data, simulation and increasingly, computer vision and AI. 
 

The opportunity

We’re looking for a senior, hands-on Unity Developer with a strong focus on mobile and gameplay. This role is about building engaging, high-quality player experiences, from core gameplay systems through to polished UI and live features. 

You’ll work closely with design, art and backend teams to ship products that sit at the intersection of sport, gaming and real-time data. There’s a strong emphasis on ownership, iteration, and understanding what makes players come back. 
 

What you’ll do

Lead development of gameplay systems and features for mobile titles 

Build clean, scalable UI/UX across a range of devices 

Collaborate closely with design, art and backend teams to shape product direction 

Integrate live data and backend systems where relevant (via exar.live) 

Support live features, analytics and ongoing optimisation of player experiences 

Mentor or support more junior developers where needed 

Contribute to technical decisions and help raise overall code quality 

Contribute ideas in a collaborative, product-driven environment 

 

What we’re looking for

5+ years’ Unity experience, with a strong focus on mobile development 

Proven experience delivering complex, production-ready features independently 

Strong C# and Unity expertise across gameplay architecture and UI systems 

Deep understanding of performance optimisation and mobile constraints 

Experience with publishing pipelines, live operations and post-launch support 

Strong understanding of player engagement, retention and modern gameplay loops 

Ability to take ownership of systems and contribute to technical direction 

A portfolio or shipped titles that demonstrate both technical depth and creative thinking 

 

Nice to have

Experience working with real-time data or live services

Exposure to multiplayer or connected experiences

Interest in sports, performance products or data-driven gameplay

Some familiarity with XR/VR development (not essential) 

 

Application process 

If this sounds like a good fit, we’d love to hear from you. Please include links to any relevant finished projects, shipped titles, portfolio work, GitHub repositories or code samples that help showcase your experience and approach to development.
 
Depending on experience and the material submitted, we may ask shortlisted candidates to complete a short technical assessment as part of the interview process.
 

What we offer

Competitive salary.

Share options.

25 days’ holiday + bank holidays. 

Christmas closure (3 additional days). 

Flexible working and hybrid options.