FullStack Engineer

IDEMIA; Courbevoie; On-site; EUR 65,000 - 90,000; Full time

Job summary

IDEMIA, a leader in identity technologies, seeks a software engineer to transform requirements into robust software, driving value and customer satisfaction. You will contribute across the development stack, reuse existing components, and follow secure coding practices while supporting testing, deployment, and maintenance.

Ideal candidates bring Node.js expertise, strong frontend capabilities, and hands-on experience with AI-assisted development.

Qualifications

• Node.js experience preferred; other languages welcome.
• Frontend stack: React, Next.js, TypeScript, state management.
• AI-native development skills: running/configuring AI agents, LLM handling.
• Experience with automated testing (unit/integration/e2e).
• Familiarity with CI/CD, cloud infra, and IaC accelerates contribution.

Responsibilities

• Write software code using multiple languages to meet requirements.
• Identify reusable components and libraries.
• Apply secure coding, code reviews, and testing best practices.
• Contribute to requirements analysis and estimation.
• Support testing, deployment, maintenance, and evolution of software.
• Design software structure including patterns and layers.
• Document solutions with comments and diagrams.
• Contribute to software architecture studies.
• Code large modules within agreed quality, deadline and cost.
• Perform design and code reviews for performance optimization.
• Promote technical governance.
• Troubleshoot complex issues.
• Coach and manage a small SDE team.

Skills

Node.js

Frontend: React/Next.js/TypeScript

AI-native development

Automated testing

CI/CD and Cloud/IaC

Tools

CI/CD

Cloud platforms (Azure/AWS/GCP)

IaC

Job description

Since our founding, IDEMIA has been on a mission to unlock the world and make it safer through our cutting-edge identity technologies. Our technology leadership makes us the partner of choice for hundreds of governments and thousands of enterprises in over 180 countries, including some of the biggest and most influential brands in the world. In applying our unique expertise in biometrics and cryptography, we enable our clients to unlock simpler and safer ways to pay, connect, access, identify, travel and protect public places – at scale and in total security.

Our teams work from 5 continents and speak 100+ different languages. We strongly believe that our diversity is a key driver of innovation and performance.

Purpose

This role transforms requirements into software according to design, to maximize business value and customer satisfaction.

Key Missions

• Uses programming, scripting and database languages to write software code that meets requirements and that optimizes software performances
• Identifies existing software components, libraries and frameworks to reuse in the solutions
• Applies knowledge of software development best practices, including coding standards, secure coding, code reviews, source control management, build processes, testing, and operations
• Contributes to requirement (functional and non-functional) analysis and estimations
• Supports software testing, deployment, maintenance, and evolution activities by correcting programming errors, responding to scope changes, and coding software enhancements
• Builds up software structure including functions, design patterns, layers, etc.
• Documents and demonstrates solutions by developing code comments, layouts, diagrams and charts
• Contributes to Software architecture (specification analysis, technical studies, technology assessment, etc.)
• Codes large and complex modules within agreed quality, deadline and cost
• Performs design and code reviews and assess software performance optimization
• Contributes and promotes the organization's technical governance
• Performs complex troubleshooting
• Coaches and can manage a small team of Software Development Engineers

Profile & Other Information

• Node.js experience is preferred. Python, Go, Java, or similar backgrounds are welcome - what matters is strong software engineering fundamentals
• Frontend: React, Next.js, TypeScript, state management, component-driven UI, accessibility
• AI-native work:
  - Running and configuring AI agents, MCP servers, and AI skills
  - Context management for successful LLM-assisted development
  - LLM cost awareness - choosing the right model for the right task, managing token usage, avoiding waste
  - Creating reusable prompts, specifications, and QA loops for agent-driven development
• Experience with automated testing (unit, integration, end-to-end)
• Familiarity with CI/CD, cloud infrastructure, and IaC is a plus - not a requirement, but it accelerates your contribution

Nice to Have:
- Experience in the payments domain is considered a strong plus
- Cloud experience (Azure, AWS, or GCP)
- Open-source contributions or personal projects
- Experience working in startup, fast-paced, or MVP-driven environments

By choosing to work at IDEMIA, you will join a unique tech company, offering a wide range of growth opportunities. You will contribute to a safer world, collaborating with an international and global community. We value the diversity of our teams and welcome people from all walks of life, regardless of how they look, where they come from, who they love, or what they think.

We deliver cutting edge, future proof innovation that reach the highest technological standards and we’re transforming, fast, to stay a leader in a world that’s changing fast, too.

At IDEMIA, people can develop their expertise and feel a sense of ownership and empowerment, in a global environment, as part of a company with the ambition and the ability to change the world.

Visit our website to know more about the leader in Identity Technologies