Finance Engineer

NestAI builds the adaptive operating system for modern battlefield operations. Most AI systems are built once, validated at deployment, and expected to stay sufficient after that. That assumption holds until conditions change, and in defence, they always do. Our team develops adaptive intelligence for unmanned and command systems: AI that continuously learns from operational data and adapts to changing conditions, deployed in environments where there is no internet, no GPS, and failure is not an option. NestOS, our open, modular, and interoperable platform, enables this at scale and keeps capability evolution under sovereign European control.

Founded in 2025 by Peter Sarlin, whose previous company Silo AI became Europe's largest AI acquisition, NestAI has grown to over 200 engineers and scientists and partners with leading European defence forces and industry. We're ambitious about what we're building and honest with each other. The bar is high, and so are the standards we hold ourselves to. But this is also a place built on humility, trust, and looking after each other. If that sounds like the kind of work you want to do, keep reading.

Join us as a Finance Engineer

Join our finance team and treat the finance stack as a product to build, not just operate. You will own the data, workflows, agents, and controls that move finance towards a near-real-time operating rhythm, and free the team, including the CFO, to spend their time on decisions instead of manual data work. This role suits someone with a solid finance foundation and a builder's instinct to automate a process rather than just document it.

What you'll work on

• Our finance function has outgrown manual spreadsheet work and point solutions stitched together by hand. This role changes that, and you will shape how finance runs. In this role, you will:
• Own the end-to-end stack of tools, platforms, and processes that finance runs on, and make the build-versus-buy calls on what to automate in-house and what to configure from a vendor.
• Design, build, and maintain AI agents and internal tools that do finance work directly, such as variance explanations, a largely...

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