Hiring: Senior Flight Software Engineer Company: Apex Location: Los Angeles, CA Job Posted Time: 2026-09-10 13:04:17 Employment Type: Full-time Target Skills & Keywords : Apex, C++, Embedded Systems, Encryption, Integration Testing, Linux, Protobuf, Python, Rust, TCP/IP, Unit Testing About the job Experience: •8+ years of total flight software experience Required Skills: •As a member of the Flight Software team, you will design, develop, and own the software driving the autonomous operation of Apex’s satellite buses. You will be responsible for developing mission critical systems that operate reliably 24/7, ensuring that Apex’s spacecraft continue to operate in all scenarios. •Work closely with both internal teams and external customers, aligning your solutions with company objectives and user requirements. 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. •Design, implement and own mission critical software applications for satellite systems. •Support commissioning of spacecraft during launch and early operations and ensure software systems remain functional during critical operations. •Own spacecraft software solutions through the full lifecycle from initial design to deployment. •Perform unit testing, integration testing, and system-level testing of software components, identifying and resolving any defects or issues. •Partner cross-functionally with cross-functional teams to baseline product requirements and technical roadmaps. Qualifications: •U.S. Person status is required as this position needs to access export controlled data. •Bachelor’s degree in CS, EE or equivalent. •Strong proficiency in programming languages such as Python, C++, Rust. •Knowledge of embedded Linux operating systems, system administration and creating Linux distributions (Yocto). •Operational familiarity with satellite systems and protocols, such as CCSDS, and ECSS. •Operational familiarity with network protocols (TCP/IP, UDP), secure communication systems, Protobuf and encryption. •Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We're a fast-growing startup that has raised more than $500M in funding, and we invest heavily in our people from day one. •Shared upside: Receive equity in Apex, letting you benefit from the work you create •Best-in-class healthcare: 100% company-paid medical, dental, and vision for you and your dependents, plus $100k life insurance at no cost •Comprehensive PTO package to reset and recharge - starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidays Compensation: •$185,000 - $215,000 / year Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!