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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Developer - **Company:** Open Systems Inc. - **Location:** St. Louis, MO, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Agile Methodology, Amazon Web Services, Confluence, JIRA, Unit Testing, Bash Shell, C++ (Programming Language), Cloud Computing, Compilers, Collaborative Software, Computer Programming, Continuous Integration, Software Debugging, Geospatial Intelligence, Gradle, Hypertext Transfer Protocols (HTTP), Web Servers, Spring Framework, Python (Programming Language), PostgreSQL, Node.Js, Software Maintenance, Service-Oriented Architecture, Software Engineering, Systems Integration, TypeScript, Web Services, Transport Layer Security, ReactJS, Gitlab, Amazon Relational Database Service, Non-relational Database, Software Version Control, Docker - **Published:** August 9, 2026 - **Apply:** https://www.wayup.com/i-j-Senior-Full-Stack-Developer-Open-Systems-Technologies-Corporation-14866330898609/ ## About the Role + Requires a Bachelor's Degree and 4+ years of prior relevant experience or Masters with 2+ years of prior relevant experience; OR 6 years of experience in lieu of degree + Must possess an active Top Secret Security Clearance with ability to obtain SCI post-hire + Proficient in software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services). + Experience with GNU based compilers + Experience programming in C++, Java, Typescript, and Bash + Experience developing in the following frameworks: Spring/Gradle/OpenJDK, React/Node + Demonstrated hands-on experience with relational and non-relational database systems such as Amazon RDS, Postgres + Strong experience coding in Python + Experience using GitLab for version control, CI/CD pipelines, and resource management + Experience using Docker to package and run applications + Experience with Web-related protocols and technologies, such as web servers, HTTP, SSL + Familiar with AWS/Cloud technologies + Strong communication skills both verbal and written. + Team Collaboration tools (Jira, Confluence) Preferred Qualifications: + Previous experience supporting the NGA customer. + Proficient in AWS/Cloud technologies Ability to work in a high-paced environment, multi-task (prioritize and manage), and work both independently and as a team. ## Description Open Systems Technologies Corporation is a leader in the government contracting marketplace, providing Enterprise Security and Cloud Computing solutions to support large organizations. Our capabilities include supplying federal government entities and private businesses with software development, scientific and engineering technical assistance, systems integration, and enterprise security. Since its founding in 1996, OST has been committed to delivering high-quality, best-in-class results that bring added value to our clients while investing in our employees' futures by providing exciting projects to work on, and robust benefits to include technical training and certifications, relocation assistance and a 401K match with immediate vesting. Open Systems Technologies is searching for an experienced Full Stack Software Developer to provide software maintenance and engineering support under the Foundation Sustainment Services contract., OST has an exciting opportunity for an experienced Software Developer to help enable NGA's Geospatial Intelligence (GEOINT) mission collecting sciences, technology and tradecraft measuring and modeling the Globe to provide three-dimensional accuracy of every point in, on, or above the Earth., Primary responsibilities will involve coding, developing, integrating, and debugging software artifacts; writing validation tests against existing baselines to ensure integrity of the code during Agile development efforts; assisting with unit testing; programming; and developing in Python, Java Spring, or other frameworks. ## Related Videos - [Grappling With Clunky Old Software? 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