Senior 5G MAC Software Engineer

About the role

Ready to make connectivity from space universally accessible, secure and actionable? Then you’ve come to the right place!

E-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services. We are building a highly-advanced low Earth orbit (LEO) space system that will fundamentally change the design, economics, manufacturing and service delivery associated with traditional satellite and terrestrial IoT systems.

We’re intentional, we’re unapologetically curious and we’re 100% committed to innovate space-based communications and deliver actionable intelligence that will expand global economies, protect space and our planet and enhance our overall quality of life.

What you will do: - Own the software architecture, redesign, implementation, and integration of MAC-side software for a new 5G NR physical layer, including PHY integration, emulation, and test capabilities.

- Define a portable, layered architecture that separates MAC behavior, the MAC-PHY interface, platform transport, and operating-system services. Support host-based simulation, execution on a simulated ARM processor, and deployment on FPGA and ASIC platforms.

- Define and evolve the MAC-PHY interface, including message sequencing, timing, buffer ownership, compatibility, versioning, and error handling. Coordinate changes with PHY and protocol-stack engineers.

- Implement and debug real-time control and data flows for terrestrial 5G NR, including PDCCH, PDSCH, PUSCH, PUCCH, PRACH, SRS, HARQ, CQI, timing advance, and measurements.

- Design low-power communication between ARM software and PHY firmware using shared memory, mailboxes, interrupts, and efficient data movement. Address concurrency, cache coherency, memory ordering, backpressure, timeouts, and recovery.

- Extend the SystemC TLM virtual platform, with guidance from system designers, and carry the software through FPGA and ASIC integration. Debug system-level failures on simulated and physical SoCs.

- Build automated regressions, test-vector flows, traces, and KPI checks that correlate behavior across simulation and hardware.

- Review architecture and code, coordinate dependencies across software, firmware, systems, verification, and hardware teams, and gradually expand into production MAC development.

What you bring to this role: - Demonstrated experience architecting and delivering embedded C/C++ software for a wireless modem, baseband, or comparable real-time, resource-constrained system.

- Practical knowledge of 5G NR MAC and relevant 3GPP specifications, including terrestrial operation, scheduling, HARQ, random access, and MAC-PHY interactions.

- Hands-on experience debugging heterogeneous SoCs and hardware-software interfaces involving shared memory, mailboxes, interrupts, DMA or similar data movement, cache coherency, and multicore synchronization.

- Experience developing embedded Linux software and working with an RTOS.