Senior Software Engineer

Belay Technologies has been voted Baltimore Business Journal's (BBJ) Best Places to Work 2026!Belay Technologies is seeking a Senior Software Engineer to join our intel team. We are seeking a high-caliber software engineer to join the ATPG Endpoint Snapshots (soon to be Access Pursuit) team in a rapid development and deployment environment. In this role, you will provide end-to-end engineering support to architect, build, and maintain robust, large-scale distributed web applications and cloud-native systems. A key focus of this position is the ability to react swiftly to emergent mission opportunities, rapidly prototyping and fielding critical capabilities under compressed timelines. You will collaborate closely with cross-functional teammates, analysts, and security researchers operating within the offensive cyber space to modernize infrastructure, integrate automated workflows, and address complex technical challenges. Ultimately,  your responsiveness and technical rigor will directly accelerate mission success by leveraging modern cloud architectures, cutting-edge automation, and AI-assisted development tools to deliver actionable insights.Responsibilities:

• Develop and maintain robust, large-scale distributed web applications and full-stack solutions utilizing JavaScript/TypeScript, Node.js, and Python. 
• Architect scalable microservices, REST middleware, and backend data processing pipelines capable of supporting high-tempo mission requirements. 
• Deploy and manage services across cloud-native and high-side environments (e.g., MACHINESHOP, AWS, C2S) utilizing Infrastructure-as-Code (IaC) and DevOps automation. Create and maintain automated CI/CD pipelines (e.g., GitLab CI/CD) to ensure rapid, secure, and reliable software delivery. 
• Collaborate with cross-functional teams, mission analysts, and vulnerability researchers to integrate engineering best practices into offensive cyber tooling and rapid-response capabilities. 
• Utilize AI-assisted development workflows (e.g., Claude Code, Codex, Opencode) to maximize development velocity when addressing emergent mission opportunities. 

Skills Requirements:

• Production-grade software development experience in Python, JavaScript, and TypeScript building enterprise-grade, distributed web applications.  
• Experience with high-side development environments (such as NSANet, MACHINESHOP, C2S, or GHOSTMACHINE) and non-attributed network configurations.  
• Knowledge of end-to-end full-stack architecture, including modern frontend design, RESTful APIs, relational/non-relational databases, and backend services.  
• Experience with DevOps automation, containerization technologies (Docker), continuous integration pipelines, and cloud service providers (AWS/C2S).  
• Knowledge of modern software engineering practices, such as Git-based version control, testing frameworks, and agile workflows within collaborative team structures

Nice to Haves:

• Experience working within or interest in offensive cyber operations (CNO/CNE, ATPG, TURBINE/ASGARD), vulnerability research, and software reverse engineering.  
• Experience using and configuring AI-assisted development tools (Claude Code, Codex, Opencode) via skills, memory, or custom extensions.  
• Familiarity with modern UI libraries (React, Angular, Vue) alongside legacy stacks (Bootstrap, jQuery).  
• Knowledge of mobile vulnerability research and Android application architecture.  
• Experience with low-level programming (C/C++), debugging tools (gdb), or legacy analytics frameworks (Java Map/Reduce, GHOSTMACHINE).

Candidates should have the following qualifications: 

• TS/SCI Clearance with polygraph
• 12 yrs., B.S. in a technical discipline or 4 additional yrs. in place of B.S.

Perks and Benefits:

• 8 weeks paid leave - 4 weeks of personal leave, 3 Yay! days, take off on your birthday,11 paid holidays and optional leave up to 6 days through Belay's volunteer program
• 10% matching in 401(k) contributions vested on day one
• $5,000 annual training/tuition
• Student Loan Repayment Program
• 100% company-funded HSA
• Rich medical coverage (100% coinsurance)
• Dental coverage including orthodontia
• Up to $420,000 in life insurance, premiums 100% company funded
• Amazon Prime, gym reimbursement, monthly lunches, games and prizes
• Pet adoption program, generous referral bonus program, fun events, and more!

At Belay, we are committed to creating an environment where you can thrive both professionally and personally.  We believe in transparency and fairness in compensation. Several factors influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, education, specific skills and competencies and certifications. Belay offers a competitive total compensation package that includes benefits and perks, a flexible work-life balance, and career development.Salary Range: $190,000 to $240,000Belay Technologies is a certified Service-Disabled Veteran-Owned Small Business located in Columbia, Maryland (Baltimore/Washington area). Belay Technologies specializes in systems automation and full stack development. Belay Technologies provides leading technology and engineering solutions to the DoD, as well as state-of-the-art commercial products. We hire software engineers, web designers, test engineers, systems engineers, systems administrators, database engineers and other tech services. We are an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military/veteran status or other characteristics protected by law.

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