Senior Software Engineer

Belay Technologies has been voted Baltimore Business Journal's (BBJ) Best Places to Work 2026! Belay Technologies is seeking a Software Engineer (Sustainment) to join our intel team. The candidate must be comfortable digging into the products and developing subject matter expertise, tackling challenges sometimes without a lot of guidance or information, and collaborating in a fast-paced, highly visible team environment. Responsibilities: Lead a small, collaborative development team supporting the sustainment and continuous enhancement of a mission-critical Enterprise Support Services application that enables a key operation. Serve as a senior technical point of contact between the development team and the customer, helping translate customer needs into clear, actionable technical requirements and solutions. Engage with customers and stakeholders to understand business needs, communicate technical approaches, refine requirements, and build alignment and buy-in for proposed solutions. Build intuitive, responsive web interfaces backed by robust data retrieval and storage capabilities. Apply hands-on expertise with modern Python frameworks - such as Django, FastAPI, or Flask - to deliver scalable, secure, and performant applications. Apply hands-on expertise with modern JavaScript and front-end frameworks, specifically React.js and Vue.js, to deliver high-quality user interfaces and dynamic, client-side application features. Integrate backend services through RESTful APIs to support seamless data flow and reliable application functionality. Leverage full-stack development skills across Python backend services and modern JavaScript front-end architectures to deliver scalable, end-to-end solutions. Demonstrate strong experience with relational database management systems (RDBMS), with primary expertise in PostgreSQL and secondary experience with Oracle and SQL Server. Translate complex business requirements into effective enhancements within existing database structures and application logic. Support and execute application upgrades while implementing code enhancements that improve performance, maintainability, and long-term sustainability. Develop efficient data retrieval solutions that power user-friendly displays and dynamic application views. Diagnose, troubleshoot, and resolve application defects to help maintain system stability and a positive user experience. Design, build, and deploy Dock containerized applications to Linux servers. Conduct thorough unit testing to validate software reliability, performance, and feature accuracy. Collaborate within Git/GitLab workflows and contribute to CI/CD pipelines that enable smooth, automated, delivery of application updates. Bring a proactive, ownership-oriented approach to problem-solving, provide technical leadership to the development teams, and demonstrate a strong willingness to take on new challenges and learn emerging technologies. Actively contribute in an Agile environment by participating in sprint planning, backlog grooming, and iterative development cycles that deliver continuous value. Candidates should have the following qualifications: TS/SCI Clearance with polygraph A bachelor's degree in a technical discipline and twelve (12) years of experience in software development/engineering. Sixteen (16) years of experience in software development/engineering may be substituted in lieu of a degree Working knowledge of JavaScript and modern front-end frameworks, specifically React.js and Vue.js. Experience with REST API Experience with modern Python full-stack development, utilizing Python web frameworks (such as Django, FASTAPI, or Flask) paired with modern front-end frameworks (React.js or Vue.js) and RESTful API integrations. Unit testing experience Git/Gitlab experience with CI/CD Experience with Docker Working knowledge of Linux Working knowledge of Agile software development processes Candidates are desired to have the following skills: Extensive experience in agile development, including running sprint planning sessions, managing sprint backlogs, and delivering high-quality results on time. A background in developing enterprise-level applications with a focus on scalability, security, and performance Experience managing systems in a virtual hosting environment including AWS Familiarity with the CI/CD 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 $240,000 Belay 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. Belay Technologies