Senior Unity Software Engineer in London

We are Sports Interactive, the gaming studio behind Football Manager. Founded in 1994, Sports Interactive became a wholly owned subsidiary of SEGA Europe in 2006. Based at the Here East technology hub in Stratford, East London, the SI team continues to expand as we bring our titles to an ever-growing audience across an increasing variety of platforms. To support our growth, we welcome the opportunity to connect with passionate people with the drive to match our ambitions and initiative to realise your individual potential.

We are seeking a highly skilled and experienced Senior Software Engineer to join our development team. You bring extensive expertise in C# and Unity, with a strong ability to architect and implement efficient, maintainable systems. This role involves architecting and implementing scalable and reusable systems using C# and Unity across multiple areas of the game, including but not limited to addressables, package management, data binding, UI and general systems and editor tooling that support our games and their features and functionality.

You will collaborate closely with other engineering teams, design, production, QA, and other stakeholders in the studio to deliver high-quality user experiences on multiple platforms including desktop, console, and mobile. Your contributions will directly shape the technical foundation and player-facing experience of Football Manager, helping deliver intuitive, performant, and engaging games to our global player base.

We expect our senior software engineers to take ownership of their work and professional development goals, continuously enhancing their technical knowledge and communication skills. You will also be expected to lead by example, mentor junior engineers, and promote best practices across the team.

• Design, implement, and maintain complex and scalable systems and features using C# and Unity that form the technical foundation for our games.
• Contribute to the development, profiling and optimisation of our code, including using Unity's UI Toolkit and dynamic data binding.
• Support the development of editor tooling and workflows that enhance productivity and streamline content integration across multiple disciplines including engineers, art & design.
• Own and maintain areas of our C# codebase, ensuring performance, maintainability, and cross-platform compatibility across desktop, console, and mobile platforms.
• Collaborate with cross-functional teams – including design, engineering, QA, and production – to deliver high-quality user experiences and features.
• Participate in planning and roadmap discussions, contributing technical insight and helping shape feature delivery and long-term architecture.
• Investigate and resolve complex technical challenges, including performance bottlenecks.
• Mentor junior engineers, promote best practices, and foster a culture of continuous learning and technical excellence.

• Extensive professional experience in video game development using C#.
• Deep proficiency in C# is essential, including memory management, garbage collection, async programming, and performance.
• A strong experience and understanding of Unity.
• Experience with Unity's UI Toolkit is beneficial but not essential.
• Experience developing Unity editor tooling and systems that support multi-disciplinary teams.
• Solid understanding of software engineering principles, design patterns, and profiling and performance optimisation.
• Proven ability to write clean, maintainable, portable, performant and well-documented code.
• Familiarity with C++ is beneficial, particularly in contexts where Unity interfaces with native modules, but not essential.
• Experience with cross-platform development across desktop, console, and mobile environments.
• Strong analytical and problem-solving skills, with a proactive approach to technical challenges.
• Excellent communication skills and ability to collaborate effectively across disciplines.
• Self-motivated with a commitment to continuous improvement and team support.
• Experience mentoring junior engineers and contributing to team-wide technical growth.
• Knowledge of Football Manager is beneficial; interest in football is a plus.

• A flexible working policy to best suit you and your team.
• Subsidised mental health, therapy and coaching sessions are available.
• Contributory Pension Scheme (up to 7% of annual salary).
• Free onsite evening bar in the Sports Interactive London HQ.
• A well-stocked breakfast bar with cereals, fruits, teas, and coffees.
• Regular events in collaboration with our partnered football clubs.
• Access to our on-site physical and massage therapist services.
• Multiple clubs and societies to join e.g., book club and art workshops.
• Free access to games released under the SEGA Europe umbrella.
• A range of Gym Membership options through our Benefits partners.
• Fully Subsidised Healthcare and Dental Plans.
• Free Travel Insurance for yourself and your family.
• A personalized football shirt upon passing probation.

We approach everything with passion, whether that is making our mark on the gaming and football industries or doing our bit for the world around us. Talent wins games, but teamwork wins titles. Collaboration is the key to constantly topping our best. We believe everyone matters, no matter which part of the business you are in, so we encourage and support our people in driving your own growth and realising your full potential. We are a team with a down-to-earth dynamic that has a lot of fun doing what we do. Our flexible working culture gives you the opportunity to optimise your workload with in-office, hybrid, and remote options dependent on role. We are a London Living Wage employer and pride ourselves on low staff turnover and recognition as a great place to work. We also support inclusive recruitment through Disability Confident commitments and equal opportunities statements.

We are proud to be an equal opportunities employer and encourage applications from any relevant candidate irrespective of sex, race, disability, age, sexual orientation, gender reassignment, marriage or civil partnership, pregnancy or maternity, religion, or belief. SI is proudly a Disability Confident Committed employer, and we are dedicated to ensuring our recruitment process is inclusive and accessible. Our studio has disabled access and facilities but please advise us if you require any other reasonable adjustments to be made to support you during the recruitment process.

• Keep collaborating: Teamwork wins titles - Here, ideas belong to everyone, whatever department you're part of. Collaboration lets us score more as a team than we could individually.
• Be flexible: We think fast and adapt faster. The football and entertainment worlds never stand still, so we keep progressing and switching things up to stay ahead.
• Stay Tenacious: We don't overlook the details. Everything we do is about producing the best game possible, in other words, never settle.
• Show Ambition: Let your drive lead the way - Your individual outlook can give everyone the edge. Make the studio's purpose personal and let your drive lead the way.
• Bring the Passion: Have fun doing your thing - Don't be fooled, what we do is not a game. Making our players' passion come to life is our passion.
• Consider the Bigger Picture: Keep things in perspective - We want our impact to be a positive one. From work/life balance to initiatives covering important topics, we have what matters in focus.