Senior Backend Engineer

About Waving and us Waving is a rapidly growing and strongly funded deep tech start-up that redefines the  security industry by protecting lives and buildings with an invisible security layer. Using our in-house created AI and Wi-Fi waves we detect human movement in ways not possible until now and use it to protect the world's critical infrastructure. With unusually strong commercial traction across some of the world's biggest airports, ports and government organisations we have innovation partners to develop our technology to scale and we're looking for a Senior Product Manager to lead Waving's product development and product-market fit. You'll be joining an amazing, talented and fun team that's moving and growing fast and where you'll be making a real impact, shaping the security of tomorrow.  About the role we're looking for We're looking for a full-time Senior Backend Engineer in Amsterdam to own Waving’s backend challenges end-to-end, building robust services that perform in protecting critical infrastructure in real-world settings. Building robust services that connect sensing devices to security control rooms, driving system reliability in real-world deployments - prioritising what matters and driving execution across hardware, firmware, backend, and data science. This is a highly pivotal role, side-by-side with our CTO and Senior Product Manager, guiding the tech team to turn our current PoCs into Waving's near-future highly scalable product, solving real customer problems and delivering real customer value. What we can offer you Being part of an amazing, talented and fun team that's here to make a real impact togetherBeing part of a fast-growing and well-funded start-up, using incredibly cool tech to protect the world's critical infrastructure in times when it's needed more than everThe opportunity to own and shape end-to-end backend engineering and shape the company's productsA fun and fast work culture that's based on trust, freedom and ownershipA generous salary packageEquity compensation, stock options on Waving's shares Who we're looking for Proven experience in leading backend engineering teams and effectively working with product managementHands-on and execution-focused, comfortable solving problems and making pragmatic engineering decisions to deliver production-quality systems.5+ years designing, building, and optimizing backend systems (hands-on)3+ years professional experience with C or C++ and with PythonExperience designing and maintaining production backend systems (services, APIs, deployment, monitoring)Nice to haves: experience working with low-spec hardware, familiarity with embedded systems or edge computing or with communication protocols such as SPI, I²C, and Wi-Fi standardsExperience in the security or technology sector is a valuable assetFluency in English What your days could look like Design, build, and optimize backend services and APIs powering Waving’s productOwn reliability, performance, observability, and incident response for production systemsBuild data ingestion and processing flows from edge devices to cloud and integrationsIntegrate with existing security workflows and control rooms (alerts, events, dashboards)Write maintainable code, tests, and documentation, improve CI/CD and deployment processesCollaborate with embedded and data teams to define interfaces and ship end-to-end features