Senior Software Engineer – Full Stack

Overview

SWISSto
12 is one of the world’s fastest-growing aerospace companies, evolving from its pioneering use of 3D printing technologies for high-performance RF products and applications to recently announcing the manufacture of entire geostationary telecom satellites, called Humming Sat, that define a new category in space.

Humming Sat is the world’s first commercial telecom GEO Small Sat developed in collaboration with the European Space Agency (ESA). Its uniquely compact size combined with highly capable telecom payloads allows telecommunications operators to deploy a cost-efficient, compact, and agile asset without sacrificing performance or security. Humming Sat has been selected by Intelsat to build the I-45 satellite, by Inmarsat to build three I-8 satellites, and recently by Astrum Mobile to build the NEASTAR-1 satellite.

SWISSto
12 is also a leading provider of Radio-Frequency (RF) products and sub-systems for satellite communication and remote sensing applications. The company’s patented 3D printing technologies and associated product designs are unique to deliver lightweight, compact, highly performing, and competitive RF products.

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related technical discipline
• 10+ years in software/system architecture or technical leadership, with proven ownership of end-to-end design for complex, mission-critical systems spanning software and hardware integration
• Expertise in RTOS-based embedded systems, real-time processing, multi-threaded/concurrent systems, and hardware-interfaced software
• Strong hands-on experience in Python and C/C++, with the ability to design across embedded, backend, and frontend layers, including APIs and distributed architectures
• Hands-on experience with Dev Sec Ops  practices, CI/CD pipelines, source control workflows, automated deployment processes and security principles
• Experience acting as a technical authority, leading architecture decisions and reviews, while mentoring engineers and driving standards across teams
• Proven ability to work across multidisciplinary teams and external partners, with clear communication of architectural decisions, risks, and trade-offs
• Strong written and verbal communication skills in English. French is a plus!
• Nice-to-Have Experience
• Experience in regulated, mission-critical, or high-reliability environments
• Spacecraft database management, including command dictionaries, telemetry definitions, packet structures, limits, calibration data, engineering parameters, and lifecycle configuration data
• Experience developing engineering software that supports spacecraft development workflows across systems, AIT, and operations preparation
• Experience with hardware-in-the-loop integration and real-time simulation platforms (e.g.Speedgoat)
• Soft Skills
• Strong ownership mentality and end-to-end accountability
• Big picture thinking: understands how software choices affect the wider product, user workflows, and mission success
• Resilient, resourceful, and comfortable navigating evolving requirements
• Mentor-like attitude with a desire to strengthen the broader team
• Clear communication and documentation of technical decisions, risks, and trade-offs

• Lead the end-to-end software architecture across different product lines ensuring coherent design across all subsystems and implementation of software portfolio strategy
• Establish architecture governance and technical authority, including design reviews, reference architectures, and enforcement of consistency across subsystems, teams, and program increments
• Drive cross-domain architectural trade-offs, balancing performance, program timelines, maintainability, and scalability constraints in mission-critical and real-time environments.
• Lead the full SDLC: requirements analysis, solution design, implementation, peer reviews, testing, deployment, production support, and continuous improvement
• Design and develop RTOS-based embedded systems, SDR-based systems, and hardware-integrated applications for real-time processing
• Drive and implement engineering best practices for testing, logging, documentation, code review, traceability,…