Mid-level back end developer

Salary: $121000 - 157000 per year Requirements: Active TS/SCI clearance is mandatory. Proximity to our San Antonio, TX site, reporting onsite up to five days a week depending on client needs. Bachelors degree in a relevant field is essential. A Masters degree can substitute for two years of experience. Minimum of 7 years of software development experience with object-oriented and scripted programming languages, alongside familiarity with various DevSecOps tools, microservices, and containers. At least 3 years of experience with bug tracking software, specifically Jira. Minimum of 3 years testing web-based applications. A minimum of 3 years contributing to software development projects. At least 3 years experience in back-end web design and development. A minimum of 3 years working with AWS Infrastructure, Kubernetes, and RedHat Linux. 5 years of proficiency with Jenkins and GitLab. At least 5 years experience with a minimum of five technologies such as Postgress, RDS, Python, Java, Docker, or other specified tools. Proven track record in relational databases, RESTful API development, and system integration. Experience preparing and documenting system tests to ensure compliance with standards. Practical experience with cloud environments. Background in integrating data from unclassified to classified application deployments. Responsibilities: Provide expert support in back-end software development activities. Utilize analytical skills to assist with process enhancements and requirements definition. Engage in the analysis, planning, and creation of requirements documents and functional models. Design and construct back-end architectures to facilitate system capabilities and integrations. Develop and adjust RESTful APIs to enhance application functionality. Manage databases, including data modeling and optimization. Assist in testing and validation processes to confirm system operability and regulatory compliance. Participate in Agile program increment (PI) planning and related activities that may involve travel. Technologies: API AWS Cloud DevSecOps Docker GitLab Support JIRA Java Jenkins Kubernetes Linux Python Security Web microservices AI Ansible CI/CD DevOps InVision Machine Learning Maven Sketch UX UI Design Backend More: We are Halcyon Labs, a respected federal partner dedicated to supporting critical national security, defense, and public service initiatives. Our recent successes in cybersecurity and operational readiness highlight our commitment as a trusted prime contractor for impactful government missions. By joining our team, you will play a role in meaningful work within dynamic environments, collaborating with professionals who prioritize service, accountability, and quality results. This position requires an active TS/SCI security clearance and entails in-person work five days a week at our San Antonio location. last updated 26 week of 2026