Lead Full Stack Engineer

Atos is the Atos Group brand dedicated to AI-powered, secure, end-to-end digital services. Atos designs, develops, and operates critical digital environments that drive performance, resilience and sovereignty, helping public and private organizations worldwide retain control over their data and infrastructures, while meeting regulatory requirements.

With more than 52,000 employees serving over 4,500 clients across 54 countries, Atos helps modernize core IT systems, accelerate cloud and data transformation, strengthen cybersecurity, and deliver secure digital workplace environments to support its clients, its employees and society. Atos also provides consulting and advisory services through its Atos Amplify brand.

A trusted partner in operating complex and mission-critical environments, Atos supports organizations across highly regulated and sovereign contexts.

About Atos Group Atos Group is a global leader in digital transformation with c. 54,000 employees and annual revenue of c. 7.2 billion, operating in 54 countries under two brands - Atos for services and Eviden for products and systems. European number one in cybersecurity and a leader in cloud, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries.

Atos Group is listed on Euronext Paris.

About Our Team Our Full stack engineering team brings together experienced engineers, diverse perspectives, and a flat team structure that enables visibility and impact from day one. With 40–50 professionals across the practice, we deliver some of the most exciting projects in the market — from next‑generation fintech payment platforms to global insurance systems deployed across multiple countries.

AI is an important part of our work, but this role is grounded in strong software engineering fundamentals. We are looking for senior engineers who enjoy architecture, system design, and end‑to‑end delivery, with a genuine interest in modern technologies, including AI.The role requires Security Clearance or ability to get SC in short timescales.

We are looking for an exceptional Lead Full Stack Engineer who wants to solve difficult problems, build important systems and remain genuinely hands-on.

You will lead the engineering of complex, high-profile software and AI-enabled solutions for major government and enterprise clients. These are environments where security, resilience, scale and sound technical judgement matter, and where the systems you build deliver real operational outcomes.

This is not a coordination role or an architecture position detached from delivery. You will write production code, tackle the hardest technical challenges, make critical design decisions and set the engineering standard for the teams around you.

What exceptional looks like

You can enter an unfamiliar programme, understand the system quickly, identify the real constraints and establish a credible technical route forward.

You can design the solution, build its most difficult components, integrate models and tools, implement the necessary controls and explain your decisions to a senior client. You make good engineers better and leave behind stronger systems, practices and teams.

You combine the depth of a principal engineer, the breadth of a full stack engineer, the practical capability of an AI engineer and the judgement of a trusted technical consultant.

If you still love building software, want ownership of genuinely difficult engineering challenges and care about delivering systems that work in the real world, we would like to hear from you.

Technical landscape

We do not recruit around a rigid stack. You may have experience with technologies such as Go, Java, C#, Python, JavaScript, Type Script,…