Senior Unity Software Engineer

SEGA; City of London; Hybrid; GBP 125,000 - 150,000; Full time

Job summary

A leading gaming company in London is seeking a Senior Unity Software Engineer to join their development team. You will design and implement scalable systems using C# and Unity, collaborating with various teams to enhance game quality. A strong understanding of software engineering principles and experience mentoring junior engineers is essential. This role offers a hybrid working model and various benefits including flexible policies, mental health support, and more.

Benefits

Flexible working policy

Subsidised mental health services

Contributory Pension Scheme

Free onsite evening bar

Regular events with football clubs

Free access to games

Fully subsidised healthcare

Free travel insurance

Qualifications

• Extensive expertise in C# and Unity.
• Experience developing Unity editor tooling and systems.
• Solid understanding of software engineering principles.

Responsibilities

• Design, implement, and maintain complex systems using C# and Unity.
• Support the development of editor tooling and workflows.
• Collaborate with cross-functional teams to deliver high-quality features.

Skills

Deep proficiency in C#

Strong experience with Unity

Analytical and problem-solving skills

Excellent communication skills

Experience with cross-platform development

Tools

Unity's UI Toolkit

C++

Job description

Overview

Job Title: Senior Unity Software Engineer
Team: Systems
Reporting into: Lead Producer
Hybrid working status: Fully remote available/Hybrid

Studio Overview 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.

Position Overview 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 re-usable 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.

Responsibilities

• 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.

Knowledge, Skills & Experience

• Deep proficiency in C# is essential, including a strong understanding of 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.

Benefits

• 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.

What is it like to work here? We approach everything with passion, collaboration, and a focus on delivering outstanding games while supporting work/life balance. We are an equal opportunities employer and encourage applications from all suitably qualified candidates. SI is Disability Confident Committed and dedicated to an inclusive recruitment process. Our studio has disabled access and facilities; please advise if you require any reasonable adjustments during recruitment.