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The role, as advertised by iniBuilds
👋 About Us
We are seeking a skilled individual with hands-on experience developing for Microsoft Flight Simulator 2020 and 2024. The role focuses on implementing aircraft systems and logic using the MSFS SDK, with particular emphasis on XML/RPN behaviors, configuration files, and well-structured package development.
You will work closely with project leads, flight model designers and artists to bring aircraft systems, animations, and interactions to life in a performant, SDK-compliant, and maintainable way.
📝 Work Description
As an XML Programmer , you will be responsible for developing, implementing, and maintaining aircraft systems and logic for Microsoft Flight Simulator 2020 and 2024 . Your work will focus on building reliable, performant, and SDK-compliant systems using XML and RPN , ensuring aircraft behave realistically and interact seamlessly within the simulator.
You will collaborate closely with project leads, flight model designers, and artists to bring aircraft systems, animations, and interactions to life, balancing technical accuracy, maintainability, and performance across both sim platforms.
🥸 Responsibilities
- Develop and maintain aircraft systems using MSFS SDK XML and RPN logic
- Implement and manage Behaviors, Templates, and Components within the MSFS framework
- Edit, configure, and maintain MSFS CFG files
- Tune aircraft systems, avionics, and interactions through CFG and XML integration
- Create, structure, and maintain MSFS package sources (SimObjects, ModelBehaviors, Panels, etc.)
- Ensure compatibility across MSFS 2020 and MSFS 2024 projects
- Debug, optimise, and refine existing systems for stability, realism, and performance
- Follow MSFS SDK best practices to support future updates and modular development
✅ Requirements
- Solid knowledge of XML and RPN, specifically within the MSFS SDK
- Strong experience working with MSFS Behaviors (animations, logic, interactions)
- Ability to edit and manage aircraft configuration files (aircraft.cfg, systems.cfg, panel.cfg)
- Ability to create, organise, and maintain MSFS package sources correctly
- Good understanding of MSFS project structure and build workflow
- Strong attention to detail and problem-solving skills
💪 Preferred Qualifications & Traits
- Experience with FS24 modular package architecture
- Understanding of creating and maintaining modular packages for MSFS 2024
- Experience with complex aircraft systems (electrical, fuel, avionics, etc.)
- Familiarity with gauges, templates, macros, and reusable SDK components
- Prior released MSFS aircraft or mods
❤️ What We Offer
- Competitive rates.
- Opportunity to showcase your work and build your personal portfolio on high-profile, highly detailed aircraft projects.
- A supportive, creative, and collaborative team environment.
- Continuous learning and professional growth opportunities.
This role at a glance
This is one of 155 programming and engineering roles open in England today, out of 630 live games jobs across the UK, and iniBuilds is hiring for 4 other roles alongside it. The title doesn’t name a seniority, so it most likely sits at mid level — the posting’s requirements are the best guide to the experience wanted. iniBuilds doesn’t publish the salary here; across the 3 mid-level programming and engineering roles on the board that do, the median is £54k.
- Discipline
- Engineering
- Level (from the title)
- Mid-level
- On gamesJobs since
- 13 Sept 2026
- Other Engineering roles in England
- 154
About iniBuilds
iniBuilds is a London-headquartered studio, founded in 2018, that develops aircraft and airport scenery for flight simulators. It began as a small team creating add-ons for X-Plane and has grown into a major third-party developer for Microsoft Flight Simulator.
iniBuilds company profile and all 5 open roles →
Guide Game programming careers: specialisms, tests and portfolios →
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