Freelance Embedded System Software Engineer Jobs in Maryland

Job #: 3037528 Apex Systems is currently hiring for an Embedded Software Engineer with one of our DoD/ Government clients. This will be a ‘6-month contract to hire’ opportunity. You’ll work 5 days onsite each week in Aberdeen, MD Location: Aberdeen, MD
Onsite expectation: 4-5 days onsite per week
Clearance Level: Secret, Ability to be processed for TS/SCI
Contract Rate: $60-75 / Hourly on W2 Qualified candidates will have the following experience and skills:
- 3–5+ years of hands-on experience in embedded software development within a research, lab, or field test environment - Demonstrated experience developing Software Defined Radio (SDR) solutions and working with RF-enabled systems - Strong programming skills in C and C++, including experience with multithreading, thread synchronization, and asynchronous callbacks - Experience working with embedded systems and hardware, including direct interaction with embedded processors and hardware interfaces - Knowledge of cross-compilation workflows and development in Linux-based environments - Experience supporting or participating in lab-based testing and integration activities in an on-site setting
Day to Day Responsibilities: • Design, develop, and test embedded software solutions supporting Software Defined Radio (SDR) and RF-based capabilities for mission-critical Army programs
• Collaborate closely with cross-functional engineering teams to rapidly prototype, iterate, and deliver innovative solutions in a fast-paced R&D environment
• Translate mission needs and real-world operational challenges into technical requirements and implement effective software-driven solutions
• Develop and optimize C/C++ code for embedded systems, including multithreaded applications, asynchronous processing, and performance tuning
• Integrate software with embedded hardware platforms, working directly with processors, interfaces, and RF components in lab and field environments
• Support system integration, testing, and validation activities, including hands-on troubleshooting and debugging in on-site lab settings
• Contribute to RF signal processing efforts, including implementation and testing of modulation, demodulation, and digital signal workflows
• Utilize Git and modern development practices to manage code, track changes, and support collaborative development efforts
• Participate in rapid experimentation and prototyping efforts, leveraging a flexible, innovation-driven engineering approach with minimal bureaucracy
• Continuously evaluate and incorporate emerging technologies, tools, and techniques to enhance system performance and mission effectivenessApplication of security settings and other commercial best
• Provides coaching and reviewing the work of lower-level technical staff. Why Join our Mission: Join a mission-driven team at the forefront of cyber and electronic warfare innovation, building next-generation embedded RF solutions that directly support the warfighter. This role offers a rare opportunity to work hands-on in a fast-paced R&D environment where creativity, rapid prototyping, and technical ownership are prioritized over bureaucracy. You’ll have the autonomy to turn real-world mission needs into impactful technology while collaborating with high-caliber engineers on cutting-edge challenges. PLEASE NOTE: Candidates must be able to obtain and/or maintain a Department of Defense Secret security clearance as a condition and continuation of employment* If you are interested, please apply here or email an updated copy of your resume to Annie Wade at Apex Systems Military & Veteran Programs
At Apex Systems, we are proud to support those who serve. Our commitment to the military community is reflected in our robust veteran hiring initiatives, military-friendly workplace policies, and nationally recognized programs. We value the leadership, discipline, and mission-first mindset that military professionals bring to our team. Join us in continuing your mission. Why Apex is a Top Choice for Veterans and Military Talent:
• Military-Friendly Employer: Recognized as a Military Friendly® Employer for multiple consecutive years.
• Transition Programs: DoD Skill Bridge program with multiple pathway options.
• Veteran Hiring Commitment: We actively partner with multiple veteran and military organizations that specialize in IT upskilling and certification training, helping service members and veterans transition into high-demand tech careers
• Apex Military Network: Internal employee resource group supporting veterans, Guard/Reserve members, and their families. Apex Benefits Overview
Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide. EEO Employer
Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at or 844-463-6178. Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.