Senior Rendering Programmer

Who We Are At Cast Iron Games, we build technically ambitious games in a calm, focused environment, where every team member has a voice. Based in Tileyard North, we collaborate with high quality partners on high-quality projects, guided by clarity, consistency, and mutual respect.
We’re a young and growing studio, but our team is made up of experienced developers who’ve worked across AAA and independent titles. Together, we’re building a supportive, balanced environment where great work happens without crunch.

As a Senior Programmer, you'll work across a variety of systems inside proprietary engines, building new features, improving performance, and unblocking others.
You'll be expected to own the implementation of significant features, contribute to technical planning, and act as a source of knowledge and mentorship for less experienced developers.
The engines you'll work with vary depending on the project, but what stays consistent is your role as a calm, trusted engineer who can dig deep, communicate clearly, and help deliver technically solid, production-ready code.

Design, implement, and maintain features and systems in proprietary or third-party game engines
Debug and optimise existing systems, performance, memory, threading, IO, etc.
Provide mentorship and support to junior and mid-level engineers
Participate in sprint planning and estimation, and help break down complex tasks
Identify risks and blockers early, and offer practical, collaborative solutions
Maintain a high level of code quality and help enforce team-wide standards
Strong proficiency with C++ in large, real-time codebases
Comfortable working in proprietary game engines
Experienced working with performance-critical systems ( multithreading, memory, IO, memory,)
Able to take full ownership of feature delivery, from planning to testing
Comfortable raising risks and suggesting practical, team-focused solutions
Passionate about writing clear, maintainable, production-ready code

Bonus Points
Experience shipping a title built in a bespoke or custom engine
Knowledge of graphics programming concepts (materials, shaders, rendering pipelines)
Knowledge of online services integration, input handling, or save systems
Background in technical tooling, automation, or performance tracking
Why Cast Iron Games
The opportunity to ship performance-optimised, cross-platform games youʼre proud of
Projects that offer real variety. Different game engines, new challenges, constant growth
Creative surroundings at Tileyard North, with a supportive creative community
Competitive salary, flexible hours and professional development support
Just good code, good people and good games

25 days annual leave + 8 days bank holiday
~1 day leave for your birthday and 1 day leave if you're moving house
~ Up to 8 days discretionary annual leave during our end of year break
~ Potential for annual performance bonus
~ Free breakfast options, juice, hot drinks and fruit
~ Employee referral bonus (up to £2000)
~ Group Life Assurance – 4 x annual salary payable to nominated beneficiaries through an expression of wishes form.
~ Critical Illness Cover – lump sum of 1 x annual salary on diagnosis of a critical illness
~ Cycle to Work Scheme
~ EV & Hybrid Car Scheme
~ Tech Purchase Scheme – split the cost of Tech or Home electronics through salary deduction, interest free
~ Healthcare Cash plan – claim back the cost of everyday healthcare, dental, physio, chiropractor, opticians, podiatry etc
~ Private Medical Insurance with Vitality
~ Reward Gateway with cashback and discounts on 900+ retailers
~ Employee Assistance Programme including Virtual GP service
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