Senior Frontend Engineer

Helsing is a defence AI company. Our mission is to protect our democracies. We aim to achieve technological leadership, so that open societies can continue to make sovereign decisions and control their ethical standards.

As democracies, we believe we have a special responsibility to be thoughtful about the development and deployment of powerful technologies like AI. We take this responsibility seriously.

We are an ambitious and committed team of engineers, AI specialists and customer-facing programme managers. We are looking for mission-driven people to join our European teams – and apply their skills to solve the most complex and impactful problems. We embrace an open and transparent culture that welcomes healthy debates on the use of technology in defence, its benefits, and its ethical implications.

Collaborating closely with our dynamic team of product designers and engineers, you will play a pivotal role in shaping the foundation of frontend racing a hands‑on approach, you'll not only lead by example, but also spearhead the development and expansion of a tight‑knit team that works across a wide range of internal teams and products. Your primary emphasis will be on enhancing usability, creating reusable foundations for multiple front‑ends and optimising the end‑user experience across the entire company.

• Review code contributions, proposals, and RFCs from colleagues. At Helsing we strongly believe that unblocking others takes precedence over spending more time on your own work.
• Own the user interface end‑to‑end, from early wireframes and prototypes through to performant, production‑ready code. You'll work closely with product and UX colleagues to shape how users interact with our tools. We have relatively few frontend engineers at Helsing; this means that we operate at a high level of autonomy and there are plenty of opportunities for impactful work.
• Propose and implement new features, capabilities, tooling, visualizations, or even full products across our stack. We encourage our engineers to look beyond their immediate team for missed opportunities, and to speak up when they identify one.
• Establish and evolve our React component library, ensuring consistency, reusability, and alignment with our visual design standards across multiple front‑ends.
• Collaborate with others beyond your team and share knowledge with the wider frontend community tribute to establishing our frontend engineering standards. Build or adopt tools that help enforce these standards, or make our frontend engineers more efficient in a different way.
• Become a mentor, find a mentee, and help support and develop our interviewing pipeline. The people make or break the company, and we want as many engineers as possible to be part of fostering and growing the organisation.
• Share your experience and technical know‑how with other Helsingers. We host tech talks, get together for smaller "let's learn together" groups, run topical office hours or reading groups (e.g., on React or Type Script), etc. to help each other get better with time.
• Connect with, understand, and make changes to backend systems as needed. Our backends are primarily written in Rust, and you'll need to be comfortable navigating unfamiliar codebases to unblock yourself and improve integrations. Rust experience is not a prerequisite to this role, though — you can learn that over time as needed.
• Present your work at our weekly demo sessions. We want engineers to come together around what they are working on and to feel like they are not endlessly squirrelling away at something that doesn’t matter. To that end, we host (and actively work towards) demo sessions that allow early feedback, celebration of progress, and a better shared understanding of everything that goes on at Helsing.

• Can write legible, maintainable, and performant frontend code — ideally using Type Script and React.
• Are experienced with APIs and server‑client communication like REST and GraphQL.
• Have experience with running live production software.
• Are passionate about staying on top of current development best practices, libraries and frameworks.
• Are comfortable working…