Senior Unity Developer - Mobile

Location: Manchester / London (Hybrid) or fully remote

Type: Full-time

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. 

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. 

• 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 

• 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 

• 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) 

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.

• Competitive salary.
• Share options.
• 25 days’ holiday + bank holidays. 
• Christmas closure (3 additional days). 
• Flexible working and hybrid options.