Senior Full Stack Engineer

Senior Full Stack Engineer

Atos Group is a global leader in digital transformation with c. 63,000 employees and annual revenue of c. €8 billion, operating in 61 countries under two brands — Atos for services and Eviden for products. European number one in cybersecurity, cloud and high performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries.

Our Gen AI 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 nextgeneration 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 endtoend 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 seeking a Senior Full Stack Engineer who is passionate about building high‑quality software and designing robust systems. You will work on complex, large‑scale solutions across multiple technology stacks, collaborating closely with clients and internal stakeholders. While you will help guide other engineers, this role is engineering‑led rather than people‑management‑focused.

This is a true full stack role, offering exposure to a broad range of technologies and architectures. You will continuously upskill while working alongside highly talented engineers, selecting the most appropriate tools and languages for each challenge. Contribute to diverse and meaningful projects From automating government client systems and delivering large‑scale platform migrations, to applying AI to enhance our products — including next‑generation fintech payment platforms and global insurance systems deployed across multiple countries.

Our culture is built by people who genuinely love technology. We value curiosity, collaboration, and continuous learning, and we actively support innovation and knowledge sharing.

As a Senior Full Stack Engineer, you will:

• Design, build, and deploy scalable, high‑quality systems
• Translate business and client requirements into technical solutions
• Work directly with clients, moving quickly from concept to production
• Lead by example through hands‑on development
• Contribute to architectural decisions across multiple teams
• Support and mentor engineers while remaining deeply involved in delivery

What You Bring

A proven track record in full stack development

Experience designing systems and solutions independently

Experience providing technical leadership while staying actively involved in hands‑on development is highly valued.

Solid understanding of maintainable code, systems design and software architecture

Experience working across multiple technology stacks

Strong experience with library‑appropriate, strongly typed languages such as C++, Java, C#, Go or Rust, along with relevant front‑end frameworks

High adaptability and the ability to learn new technologies quickly

Interest in modern technologies such as new languages, AI, cloud platforms

Strong communication skills and confidence working with clients and distributed teams

Your Benefits, Your Way

25 days annual leave, with the option to purchase additional days

Private Healthcare

Life Assurance

Income Protection

Pension contribution matched up to 10%

Flexible benefits, allowing you to tailor your package around wellbeing, family support, and more

Selection Process

Recruiter introduction

Online test (approximately 35 minutes, completed in your own time)

Technical interview with the Head of Gen AI Practice

Live coding session with a future colleague (All interviews are conducted via MS Teams.)

Diversity, Equity & Inclusion

Here at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all. As a Disability Confident employer, we encourage applications from all applicants, especially, differently abled applicants. We aim to ensure that those who meet the minimum criteria for this position will be offered an interview. We are committed and willing to making reasonable adjustments to the application and assessment process to accommodate your needs. We are also a care leaver-friendly employer.