Senior Firmware Engineer

The role

You will design and implement embedded C/C++ firmware for collars running on FreeRTOS. You will work on communication systems, design hardware-adjacent algorithms, and take end-to-end ownership of firmware from design to mass deployment.

What you will do

• Design and implement robust embedded C/C++ firmware for collars running on FreeRTOS
• Work on communication systems including LoRa mesh networking, cellular connectivity, and BLE
• Design and tune algorithms for signal processing, timing, synchronisation, filtering and estimation
• Take ownership of firmware from initial design through implementation, testing, and mass deployment
• Debug intermittent, field-only problems using logs and telemetry
• Work closely with hardware engineers on analog and digital interfaces
• Contribute to platform quality and reliability through better patterns and tooling
• Support and mentor other engineers through design conversations and code reviews

Required qualifications

• Experience designing and delivering firmware for resource-constrained embedded devices
• Strong C/C++ fundamentals
• Comfort working close to hardware including interrupts, memory constraints, real-time behaviour, and concurrency
• Maths and/or physics background or equivalent depth
• Experience with wireless or networked communication systems such as LoRa, BLE, cellular, or mesh networking
• Strong sense of ownership
• Comfortable working with low-level hardware and resource-constrained systems
• Strong team player

Nice to have

• Experience with RTOS internals (FreeRTOS or similar)
• Experience with GPS/GNSS systems, time synchronisation, or distributed systems
• Background in signal processing, control theory, estimation/filtering, or applied statistics
• Experience with cellular or other IoT communication technologies (LTE-M, NB-IoT, eSIM, or similar)
• Curiosity about farming, animal welfare, or hardware that survives outdoors on a live animal

Benefits

• Salary, benefits and an employee stock ownership plan
• Southern Cross Health Insurance
• Annual $1000 self-development budget
• 6 months of fully paid parental leave for primary caregivers
• 4 weeks of fully paid secondary caregiver leave
• Wellness leave
• Unlimited paid annual leave

Before you apply

• Apply by sending a cover letter explaining why you are excited about the role and working at Halter, along with your CV

About the company

Halter is on a mission to enable farmers and graziers to run productive and sustainable operations. The company is backed by Tier 1 investors including Founders Fund, Bessemer Venture Partners, BOND, DCVC, Blackbird, Promus Ventures, Rocket Lab’s Peter Beck and Icehouse ventures.