• We filter hardest on mission drive, low ego, attention to detail, and resilience under pressure. We want someone who cares about front-end engineering as a craft and can still move quickly when the problem is ambiguous.
• Strong production experience with React and TypeScript, with front-end engineering as a core part of your craft
• A track record of owning complex interfaces from problem definition through release and iteration
• Strong product and design judgement: you notice weak hierarchy, inconsistent interactions, and confusing states before a specification points them out
• Pragmatism and low ego: you can improve rough work from other engineers without turning every implementation choice into a philosophical debate
• Comfort with ambiguity and changing priorities, while keeping the quality of what ships high
• EU or UK citizenship (contractual requirement tied to our defence contracts)
• Experience with mapping, cartographic, GIS, or other geospatial applications
• Front-end performance work involving large or real-time datasets
• Experience building offline-capable or resource-constrained web applications
• Experience creating or scaling a design system
• Prior work in defence, government, or dual-use technology
• 2. Front-end interview: 60 min, online. We assess React and TypeScript fundamentals, product judgement, and how you reason through an unfamiliar interface problem.
• 3. Onsite in Paris: half day. You see the product, present a project you are proud of, and work through a front-end design and re-engineering exercise based on a realistic product problem.
• 4. Roundtable: hiring committee reviews the full set of evidence and makes the final decision.