Software Developer jobs in United Kingdom

CHAOS Inc. is a global technology company delivering next-generation capabilities to the defense and critical industrial sectors. Founded in 2022 by a seasoned leadership team, CHAOS has quickly become the place where world-class multi-disciplinary engineers come to build mission-critical technologies. CHAOS has a mission-focused culture, dedicated to solving the toughest technical challenges. Its unique agile engineering approach enables rapid prototyping, while deep partnerships with defense and industry ensure real-world solutions.

Role Overview

With a deep understanding of our engineering, technology, and customers’ missions, Mission Engineers drive the successful deployment of CHAOS capabilities directly into the hands of users. Mission Engineers design and implement new software from the ground up, integrate and analyse data from our edge sensors, apply and develop machine learning and AI solutions to real-world challenges, and test and refine CHAOS products in customer environments. Throughout, Mission Engineers deliver vital feedback to help shape product direction and ensure our technology evolves in lockstep with real-world mission needs.

Responsibilities

• Test, deploy, and troubleshoot CHAOS products in the field.
• Understand customer workflows and translate them into clear product and technical requirements.
• Collaborate with core engineering teams to prioritise feedback, shape product direction, and drive delivery.
• As an early engineer on a growing team, design and build new software products that bridge the gap between CHAOS capabilities and customer mission needs.
• Integrate data from CHAOS edge sensors into customer systems.
• Apply and develop machine learning and AI solutions to applied problems, using analysis of sensor data to iterate and improve performance.
• Travel (typically up to 25%, with flexibility for higher travel periods when needed) to customer sites and our offices in LA & Washington DC.

Minimum Requirements

• Strong technical foundation, ideally with a background in Computer Science, Software Engineering, Data Science, Mathematics, Physics, Aerospace Engineering, or a related field.
• Proven programming skills, with proficiency in languages such as Python, TypeScript/JavaScript, or similar technologies.
• Ability and interest to travel (typically up to 25%, with flexibility for higher travel periods when needed) to customer sites and our offices in LA & Washington DC.

Preferred Requirements

• At least one year of relevant work experience, especially in a defence context.
• Familiarity with core technical concepts – such as data structures, storage systems, cloud infrastructure, and modern front-end frameworks.
• Confidence working in a command-line environment, with familiarity using tools like Git, SSH, and Linux-based systems.
• Experience applying machine learning or AI techniques to real-world or customer-facing problems.
• Thoughtful about how technical choices shape user experience, and comfortable managing internal and external stakeholders with a mix of technical insight and common sense.
• Demonstrated ability to learn new concepts quickly and adapt in a fast-paced, dynamic environment.
• Comfortable working both autonomously and within teams that include both technical and non-technical members.
• Existing UK security clearance, or eligibility to obtain it.

Why CHAOS?

• Health Benefits: private medical, dental and vision benefits (for employees & dependents) will be 100% paid for by the company
• Additional benefits: 5% pension match
• Compensation Components: competitive base salaries, generous pre-IPO stock option grants, relocation assistance + (coming soon!) annual bonuses
• Company Size: 130 employees and counting!
• More About Us: We're building the next generation of aerospace, defense and critical industry technologies with a seasoned team of mission-focused individuals. We were founded in June 2022 and our goal is to become the platform where world-class engineers come to solve critical, real-world problems. We use agile engineering approaches which enable rapid prototyping, deep partnerships with the defense industry ensuring real-world application, and our newly-invented Coherence platform (through which we’ve made a fundamental breakthrough) improves sensor performance and decision-making in real-time. As of April 2025 we have raised $490M (including a $275M Series C at a $2B valuation) from some of the most prominent VC funds and investors including Accel, NEA, 8VC, and Valar. With a managing team that includes Epirus’ founding members (responsible for building a $1.5B company from scratch) + key drivers from Palantir (instrumental in Palantir’s growth to $1B in revenue), we are well-positioned to become one of the fastest growing companies to date!

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