About the role: We’re looking for an experienced Multiplayer Programmer to take ownership of our networked gameplay systems. You will be responsible for designing, implementing, and maintaining robust multiplayer architecture that supports millions of players in a live environment. This is a senior-level role requiring strong distributed systems thinking, performance awareness, and production experience shipping multiplayer titles. You will work closely with gameplay engineers, designers, QA, and production to ensure our multiplayer experience is authoritative, scalable, secure, and performant across platforms. This role is hybrid based at our office in Southampton. At this time, we are unable to provide visa sponsorship. Applicants must have the right to work in the UK. We’re ideally looking for someone who can start as soon as possible. Your responsibilities will include: Design and maintain client–server architecture Implement and optimize state replication systems Improve server authority and validation systems Optimize bandwidth and server usage Debug and resolve desync, latency, and networking edge cases Collaborate with gameplay engineers to ensure multiplayer-safe feature implementation Profile and improve network performance across PC and console platforms Contribute to technical direction for online systems Requirements: 4 years professional experience in game development Proven experience shipping at least one multiplayer title Strong C# proficiency Experience with Unity multiplayer frameworks (Netcode, Mirror, Photon, or custom solutions) Experience debugging complex synchronization issues Ability to write clean, maintainable, production-ready code Strong communication skills and ability to work cross-discipline Deep understanding of: Client–server networking models Replication strategies Latency mitigation techniques Network optimization and bandwidth constraints Nice to Have: Strong knowledge of Phasmophobia Experience on live or multi-platform projects Background in gameplay or systems design Experience shipping modern console multiplayer titles Familiarity with backend services and matchmaking systems Knowledge of anti-cheat strategies and server validation Experience supporting live service games at scale Benefits & Perks Competitive salary 5% Employer Match Pension Scheme Annual performance bonus Company performance bonus ️ Weekly free team lunches – good food, great company! Regular social events – we love bringing our teams together! Hybrid & flexible working options Flextime – because life doesn’t always fit 9–5 ✈️ Team getaways Relocation package (Within the UK only) to help you settle in Employee of the Month vouchers ♀️ Personal wellbeing allowance Referral scheme Training & Development Budget – invest in your growth with courses, conferences & learning resources Training & career development support Vitality Health Insurance – includes Vision, Dental & Travel cover ️ Aviva Life Insurance 30 days holiday, including your birthday and a dedicated wellbeing day Christmas studio shutdown – enjoy the holidays, on us!