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Senior Embedded Software Engineer

X4 Technology
Brentwood, NY Full Time
POSTED ON 7/31/2026 CLOSED ON 8/4/2026

What are the responsibilities and job description for the Senior Embedded Software Engineer position at X4 Technology?

Senior Embedded Software Engineer (Wireless & Hardware Systems) – Permanent


About the Company

A confidential, well-established product design and engineering consultancy is seeking an experienced Embedded Software Engineer to join its team on a permanent basis. The organisation delivers end-to-end product development services, turning complex ideas into fully engineered, production-ready solutions across embedded systems, electrical, mechanical, and software disciplines.


Projects span connected devices, IoT systems, and low-power embedded products where hardware and firmware are tightly integrated. Engineers work in multidisciplinary teams focused on building real-world, manufacturable solutions.


The Role

We are looking for a mid-to-senior Embedded Software Engineer to design, develop, and support firmware for low-power, connected embedded systems.


This role is ideal for engineers who enjoy working across both firmware and hardware-adjacent development, including close collaboration with electrical and hardware teams.

We are especially interested in candidates with experience in one or more of the following areas:

  • Wireless / connectivity development (Bluetooth / BLE, Wi-Fi, Zigbee, cellular IoT)
  • Hardware development or strong hardware collaboration experience
  • Schematic review and understanding of electronic designs
  • PCB design exposure or hands-on PCB development experience
  • Battery-powered and low-power system design and optimisation


You will be embedded in a team working across full product lifecycles—from early design through to prototype, validation, and production support.


Key Responsibilities

  • Develop and maintain embedded firmware in C/C for microcontroller-based systems
  • Design firmware for low-power, battery-operated devices
  • Work with hardware interfaces including I²C, SPI, UART, CAN, GPIO, and ADC
  • Read and interpret schematics and component datasheets or Implement and support wireless communication features (BLE and other IoT protocols)
  • Support debugging and validation using lab equipment such as oscilloscopes and logic analysers
  • Collaborate closely with hardware, electrical, and systems engineers
  • Contribute to firmware optimisation, verification, and system-level performance improvements


Required Experience

  • Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, or related discipline
  • 7 years of embedded systems experience
  • Strong proficiency in embedded C/C
  • Experience with microcontrollers (e.g. ARM STM32, NXP, AVR, PIC, DSP platforms)
  • Experience developing bare-metal and/or RTOS-based firmware
  • Experience working with low-power embedded and battery-operated systems
  • Ability to work effectively in hardware-facing engineering environments


Preferred Experience

  • Exposure to PCB design tools and workflows
  • Strong understanding of Bluetooth Low Energy (BLE) and IoT connectivity
  • Ability to read and interpret schematics at system level
  • Experience with battery systems, power management, or energy optimisation
  • Familiarity with Silicon Labs BG22 or similar platforms
  • Experience working in client-facing or consultancy-style engineering environments
  • Ability to contribute to system architecture and design decisions


Location & Engagement

  • Permanent with Industry leading benefits and a 9/80 schedule
  • Majority onsite working model in Long Island, NY area
  • Some flexibility depending on project requirements
  • Potential for long-term engagement based on performance and project needs


What’s on Offer

  • Competitive W2 compensation aligned with experience
  • Exposure to complex, real-world embedded product development
  • Cross-disciplinary engineering environment (hardware, firmware, systems)
  • Opportunity to work on full lifecycle product development
  • Flexible working structure (including 9/80 schedule where applicable)
  • Collaborative, engineering-driven culture focused on innovation


Why This Role

This is a hands-on embedded engineering role where firmware meets hardware. You’ll be working on complete systems—not isolated software components—contributing directly to how connected, low-power products are designed and brought to life.


Equal Opportunity

The employer is committed to building a diverse and inclusive engineering team and considers all qualified applicants without regard to protected characteristics.

Salary : $160,000 - $200,000

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