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About the Role

As an Embedded Software Engineer on Apex's Flight Software team, you will write the software that runs on the custom avionics hardware powering our satellite buses. You will work closely with avionics, GNC, propulsion, and hardware engineers to design and deliver the software for the components that make up the spacecraft, owning that software from the design phase all the way through flight. You will contribute across the full breadth of development, from architecting new systems and prototyping early ideas to writing the mission critical code that ultimately flies. We are looking for motivated engineers who are eager to solve complex problems with a focus on practicality and scalability, and who thrive in a dynamic, fast-paced environment.

Responsibilities

Develop low-level software that configures and drives processor peripherals and communication interfaces on avionics.
Write and debug device drivers for sensors, actuators, and components across the bus.
Implement onboard algorithms, including closed-loop control and logic for fault detection and response.
Write iterative code for bench and development testing, as well as rigorous, reviewed, and tested code for manufacturing and flight.
Provide embedded software input into new system and hardware designs.
Support spacecraft commissioning during launch and early operations, ensuring software systems remain functional during critical operations.

Requirements

U.S. Person status is required to access export-controlled data.
Bachelor's degree in CS, EE or equivalent, or equivalent professional experience.
3+ years writing C/C++ for embedded systems, ideally on spacecraft, robotics, automotive, or other hardware interacting with the physical world.
Experience developing firmware for microcontrollers, either bare-metal or on an RTOS.
Experience writing and debugging low-level device drivers over interfaces such as SPI, I2C, UART, Ethernet, and CAN.
Comfort with hardware/software integration, including reading schematics and using tools like oscilloscopes and logic analyzers.
Solid understanding of microcontroller and microprocessor architecture, including memory, buses, and DMA.
1+ year of flight software experience (preferred).
FPGA development experience (preferred).
Experience bringing up new avionics or flight hardware from first power-on (preferred).
Experience with satellite attitude control systems (ACS), including reaction wheels, magnetorquers, and small thrusters (preferred).
Experience driving motors and power electronics or reading feedback sensors such as encoders and current monitors (preferred).
Familiarity with satellite systems and protocols, such as CCSDS and ECSS (preferred).

Skills

C/C++
Embedded systems
Firmware development
Microcontrollers
RTOS
SPI
I2C
UART
Ethernet
CAN
Hardware/software integration
Schematic reading
Oscilloscopes
Logic analyzers
Microcontroller architecture
Microprocessor architecture
Memory
Buses
DMA
FPGA development
Satellite attitude control systems (ACS)
Reaction wheels
Magnetorquers
Small thrusters
Motor control
Power electronics
Encoder feedback
Current monitors
Satellite systems
CCSDS
ECSS

Location

Playa Vista

Work Type

Full-time

Experience Level

3+ years writing C/C++ for embedded systems
1+ year of flight software experience

Education Level

Bachelor's degree in CS, EE or equivalent, or equivalent professional experience.

Salary/Compensations

Compensation ranges are set by role, level, location, and alignment with market data. A candidate's specific level and base pay are determined case by case and may vary with job-related skills, education, experience, technical capabilities, and internal equity. Beyond base salary, full-time hires are also eligible for long-term incentives in the form of stock options, along with medical, dental, and vision coverage and a 401(k) retirement plan.

Benefits

Equity in Apex
100% company-paid medical, dental, and vision for you and your dependents
$100k life insurance at no cost
15-20+ days vacation annually
10 paid holidays
Competitive 401(k) plan with generous matching
8 weeks paid parental leave
Childcare reimbursement up to $350/day for work-related travel
Daily catered lunch
Unlimited snacks
Monthly office socials
Pickleball tournaments
Run club
Gatherings for you and your family
Dream desk setup
Tools to be productive

About the Company

Apex manufactures satellite buses at scale using a combination of software, vertical integration, and hardware designed for manufacturing.
Apex's spacecraft enable the future of society, ranging from earth observation to communications and more.
Apex believes in creating a work environment that employees look forward to embracing every day.
Apex is a fast-growing startup that has raised more than $500M in funding.
Apex invests heavily in its people from day one.
Apex's work is governed by U.S. export control laws, including the International Traffic in Arms Regulations (ITAR) and the Export Administration Regulations (EAR).

Equal Opportunity

Apex Technology, Inc. is an Equal Opportunity Employer.
We celebrate diversity and are committed to creating an inclusive environment for all employees.
Candidates and employees are always evaluated based on merit, qualifications, and performance.
We will never discriminate on the basis of race, color, gender, national origin, ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.