Radio Frequency Simulation Engineer

Company

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 RF Simulation Engineer

As part of our Simulation team, you will bring realistic, physics-based radio frequency (RF) propagation modelling into our simulation environment for autonomous vehicles, including UAVs and UGVs. Rather than chasing perfect accuracy, you will focus on capturing the real-world effects that simple statistical models miss, such as blockage, reflections, and multipath. This role suits someone who enjoys working at the intersection of RF theory and software, and who can translate complex propagation effects into tools the wider engineering team can rely on.

What you'll work on

Our Simulation team builds the physics-based models that make autonomous vehicle simulation trustworthy when it comes to RF behaviour, not just statistically plausible. In this role, you will:

• Develop RF propagation and channel models for vehicle-to-vehicle communication links.
• Model GNSS signal propagation and the effect of the surrounding environment on positioning.
• Turn simulation results into meaningful link-quality and performance metrics.
• Validate models against theory and real-world measurements.
• Work closely with other engineering teams to integrate and improve the models.

What we're looking for

If your background doesn't match every requirement but the work resonates with you, we'd encourage you to apply. How you think, learn, and take ownership matters more to us than ticking every box. Here is what we are looking for:

• Several years of hands on experience in product development context
  Experience working across disciplines, with the ability to explain RF concepts clearly to non-RF engineers.
• Hands-on experience with PHY, signal processing, and RF systems, built on working with real wireless systems rather than theory alone.
• Experience with ray tracing and propagation modelling, including knowing when deterministic models are needed instead of statistical ones.
• Solid programming skills and experience turning models into working software.

Nice to have:

• Experience with GNSS, especially multipath and signal degradation, and with field testing and RF measurements.
• Experience with antennas, including directional antennas.
• Knowledge of mesh or ad-hoc networking.
• Background in robotics, drones, or autonomous systems.

Why join NestAI

• Work alongside over 200 engineers and scientists, including 60+ PhDs. People who've built AI platforms, autonomous systems, and defence technology across Europe. Most of our people say the best thing about NestAI is the people you get to work with.
• Work with real ownership. You identify what needs building, talk to the right people, and ship. Ownership here is the expectation, not a talking point.
• Work at a pace where Monday's idea can be Friday's deployment. The problems we're solving are urgent, so the culture reflects it.
• Work on systems that must operate with no connectivity, no GPS, and no margin for error. The problems we're solving are technically hard, genuinely novel, and they sit at the intersection of AI and the physical world.
• Work at a company where the platform, the practices, and the standards are all being built right now. The people here get to define how things work and how they scale.

What we offer

We offer practical benefits to support your work and wellbeing:

• The chance to participate in the NestAI Employee Stock Option Program (ESOP)
• Occupational healthcare (currently provided by Mehiläinen)
• Epassi Flex benefit for sports, culture, commuting, and wellbeing
• Lunch benefit (25% tax-free coverage)
• Mental wellbeing services via Auntie
• Holiday allowance (50% of holiday salary)
• Phone benefit (subscription and device per company policy)
• Your choice of Mac or PC
• Regular team lunches and company events

We are continuously developing our benefits offering as we grow.

Good to know

This role requires a security clearance, which is standard for defence industry positions in Finland. The process is handled by the relevant authority and typically takes two to three months. You can start working at NestAI before the clearance is finalised. We are happy to answer any questions about the process during the recruitment.

Please note, we can't accept applications sent via email.

NestAI is an equal opportunity employer. We evaluate all applicants on their skills, experience, and potential, regardless of background, identity, or personal characteristics. We believe the best teams are built from diverse perspectives, and are committed to creating an environment where everyone can do meaningful work.