Bring Up Firmware Engineer

Xscape Photonics Inc; California (MO); On-site; USD 90,000 - 130,000; Full time

Job summary

Xscape Photonics Inc. is seeking a skilled Firmware Engineer to lead validation and test firmware for our optical communication hardware.

You will drive bring-up, characterization, and qualification of control algorithms for lasers, modulators, and photodetectors in our integrated photonics platform. You will prototype control methods in Python and implement them as embedded firmware, ensuring repeatable validation across an array of hardware units.

Qualifications

• 3+ years of embedded firmware experience in C/C++.
• Experience with real-time systems and interrupt-driven design.
• Experience with microcontrollers and I2C/SPI/UART interfaces.
• Ability to read schematics and work with PCB hardware during bring-up.
• Version control using Git and standard software practices.

Responsibilities

• Design and implement validation firmware for MCU-based platforms driving lasers and sensors.
• Implement Python-prototyped control methods as embedded firmware.
• Interface with ADC/DAC for laser current control, temperature, and photodiode feedback.
• Develop bootloaders, firmware update mechanisms, diagnostics/telemetry.
• Configure sensors and peripherals over I2C, SPI, UART, GPIO.
• Support hardware bring-up and lab debugging with standard instruments.
• Document failure modes and hand off validated behavior for productization.
• Maintain design docs and test procedures.

Skills

C/C++

Embedded RTOS

Microcontrollers

I2C/SPI/UART

Device drivers

Git

Oscilloscope

Python

Education

BS in Electrical Engineering

MS in Electrical Engineering

Tools

Git

Oscilloscope

Logic Analyzer

DMM

PCB Bring-Up

Job description

Xscape Photonics is looking for a skilled Firmware Engineer to lead the development of the validation and test firmware used to bring-up, characterize and qualify new hardware and control algorithms in our optical communication systems. This role presents an exciting opportunity for individuals passionate about photonics and firmware development who want to build the embedded systems that operate lasers, modulators, and photodetectors in an integrated photonics laser platform.

In this role, you will develop the validation firmware, prioritizing deep access, instrumentation, and rapid iteration that bring-up efforts require. You will test new hardware and control methods on early units, and work closely with our production firmware team to handoff validated behavior for productization.

Responsibilities

Design and implement validation firmware for microcontroller -based platforms that drive lasers, modulators, photodetectors, and associated control electronics — to bring up, characterize, and quality new hardware and control algorithms.

Implement control methods prototyped in Python as embedded firmware, and verify they reproduce the intended behavior on hardware.

Interface with precision ADC and DAC channels for laser current control, temperature control (TEC), power monitoring, and photodiode feedback.

Implement bootloaders, firmware update mechanisms, and diagnostics/telemetry features for manufacturing and field support.

Configure and read sensors, DACs/ADCs, and control elements over I2C, SPI, UART, GPIO.

Support hardware bring-up, board-level debug of custom PCBs and evaluation boards, using standard lab instrumentation (oscilloscope, DMM, logic/protocol analyzers).

Characterize behavior across operating corners, document failure modes and resolutions, and handoff validated behavior and test procedures for productization.

Maintain design documentation, interface control documents, and test procedures for productization.

Required Skills & Experience

BS/MS in Electrical Engineering, Computer Engineering, or a related field, with 3+ years in embedded firmware.

Embedded firmware in C/C++ for real-time systems (bare-metal and/or RTOS-based), including real-time and interrupt-driven design.

Microcontrollers and low-level peripheral interfaces (I2C, SPI, UART, GPIO, ADC/DAC)ADC/DAC interfacing —configuration, calibration, sampling strategies, and filtering.

Microcontroller clocking and timing: clock tree and PLL configuration, hardware timers/PWM, interrupt latency and priority management, and timer/DMA-driven deterministic sampling.

Implementing hardware-control algorithms as clean, modular, and testable firmware.

Reading schematics/ datasheets and working directly with PCB-level hardware during bring-up and debug, using standard lab instrumentation (oscilloscope, DMM, logic/protocol analyzers).

Version control (Git) and standard software engineering practices.

Strong problem-solving and analytical skills; Excellent communication and teamwork.

“Nice to have” Skills & Experience:

Closed-loop control theory and its implementation in software and hardware (PID and beyond, system identification, stability analysis).

Photonics components and systems, including lasers, optical amplifiers, modulators, and photo detectors; familiarity with TOSA/ROSA components and laser driver ICs.

TEC control, thermal management, and precision analog control loops.

Mixed-signal PCB design and bring-up, including schematic capture and layout review, power delivery, power sequencing, and biasing.

Embedded Linux or SoC FPGAs (e.g., Zynq, Cyclone/Arria SoC) — firmware/FPGA interfacing, register-map design, HDL (VHDL/Verilog) awareness.

Python for higher-level control, test automation, and data analysis.

DSP fundamentals (filtering, sampling theory, noise analysis).

Unit testing frameworks, static analysis, and CI/CD for embedded projects.