Senior Staff Software Engineer, NR-NTN at Skylo

The world still has coverage blind spots. You could help eliminate them at Skylo. Skylo has pioneered a standards-based approach to satellite connectivity. We connect smartphones and IoT devices directly to satellites. No special hardware, no entirely new networks. Just billions of existing devices, suddenly reachable anywhere on Earth. We're not building toward this future. We're already in it. Our direct-to-device service is live on millions of activated devices across five continents, covering more than 72 million square kilometers, in partnership with leading satellite operators, mobile network operators, Tier-1 chipset makers, and OEMs worldwide. And we're just getting started. At the heart of it all is Skylo's commercial NTN vRAN: a 3GPP standards-based, cloud-native platform that seamlessly bridges terrestrial and satellite networks. It's the infrastructure that makes true anywhere, anytime connectivity possible. When you join Skylo, you'll work at the intersection of three markets reshaping how the world stays connected: mass-market consumer devices, automotive, and industrial IoT. Enabling people outdoors and critical workflows in the world's most remote places. This is a rare chance to work on technology that matters, at a company that's already proving it works. This role is based in Espoo, Finland, one of the three Skylo's core engineering hubs and fastest-growing sites. You'll work onsite three days a week as part of a team that's scaling quickly. How You Will Impact Skylo As a staff software engineer, you will be the technical visionary driving the development of Non-Terrestrial Network (NTN) capabilities within our gNodeB software stack. This role sits at the intersection of traditional cellular protocol engineering and the evolving domain of satellite communications. You will oversee the entire software lifecycle—from 3GPP feature analysis to high-level architectural design—ensuring our RAN systems meet the unique timing and mobility challenges of satellite-integrated 5G. What you'll do - Architectural Leadership: Lead the end-to-end design, development, and maintenance of 5G NR L2/L3 protocol stacks and MAC-Schedulers specifically optimized for NTN (LEO/GEO) environments. - Requirement Analysis: Translate 3GPP Release 17/18+ NTN specifications into actionable software requirements and technical roadmaps. - Design & Development: Author High-Level Designs (HLD) and Low-Level Designs (LLD) for gNodeB components, focusing on compensation for large propagation delays and high Doppler shifts. - Feature Prioritization: Analyze and prioritize 3GPP features (e.g., HARQ disabling, timing advance enhancements, and cell discontinuous coverage) for integration into the RAN subsystem. - Mentorship & Quality: Provide technical guidance to development teams, perform code reviews, and ensure the architectural integrity of the product during maintenance and delivery phases. Sound like you? You bring: - Experience: In LTE/5G NR protocol software development, with at least 3 years in an Architect or Lead Developer role. - Satellite Domain: Proven track record of adapting terrestrial RAN software for satellite payloads or transparent/regenerative architectures. - Testing: Experience with UE simulators and channel emulators configured for high-latency satellite profiles. - Education: Bachelor’s or Master’s degree in Computer Science, Telecommunications, or Electronic Engineering. What We Offer This is a once-in-a-lifetime opportunity to help build and run the world's first commercial, live direct-to-device satellite network. You'll work alongside a world-class team spanning software, hardware, chipsets, telecom, satellite, and network virtualization, some of the most sought-after expertise in the industry. And you'll do it inside a culture that's open, transparent, and inclusive, shaped by the best of Silicon Valley, Nordic, and South Asian ways of working. With employees working across three continents, Skylo is proud to be an equal opportunity employer dedicated to building an inclusive and diverse workforce. Our worldwide and inclusive culture encourages a flexible approach to work, and we also offer an attractive range benefits such as:   - Fair & transparent compensation, we'll share salary details with you in your first interview - Occupational Healthcare, Health and Life Insurance - E-passi including, wellness, culture, lunch and commuting benefit - Phone & Internet allowance - Individual learning & development budget for further personal and professional development Ready to join us? Apply now and a member of our recruiting team will be in touch. We review applications on an ongoing basis, so we encourage you to apply early. Our process includes an initial call with a recruiter, a take-home assignment, and two interviews with different team members. Still have questions? Teea Kuusimurto, our Senior Recruiter, has answers. Say hello at [Upgrade to PRO to see contact]. About Skylo Technologies Skylo Technologies is the architect of the Standardized Sky, a global approach to satellite connectivity built on shared standards rather than proprietary systems. As a global non-terrestrial network service provider, Skylo enables mobile networks to extend seamlessly beyond terrestrial coverage by orchestrating connectivity between satellites, mobile operators, and device makers using 3GPP standards. Skylo’s platform creates a single, interoperable connectivity layer that works across networks, devices, and geographies — allowing satellite to function as a natural extension of mobile networks. Skylo’s commercially deployed NTN service supports millions of devices across consumer, enterprise, and IoT use cases, helping ensure connectivity is reliable, efficient, and available wherever it’s needed. Skylo is headquartered in Mountain View, California