> Markdown version of [/jobs/ext/3788183-software-developer-iii](https://www.wearedevelopers.com/jobs/ext/3788183-software-developer-iii). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Developer III - **Company:** ATTAINX INC - **Location:** United States (Remote available) - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** Agile Methodology, Artificial Intelligence, Application Integration Architecture, Automation of Tests, Code Review, Information Systems, Continuous Integration, Relational Databases, Software Debugging, Web Development, Design of User Interfaces, OAuth, Cloud Services, Application Data, Security Assertion Markup Language (SAML), Secure Coding, Software Engineering, SQL Databases, Systems Integration, Software Vulnerability Management, Git, Information Technology, Restful APIs, Cloud Application Development, Data Pipelines, Programming Languages - **Published:** October 16, 2026 - **Apply:** https://jobs.military.com/career/366595/software-developer-level-iii-virginia-va-arlington ## About the Role * Bachelor's degree in computer science, information systems, software engineering, or a related field.\n * 4-7 years of related experience in software development, application integration, or a comparable technical role.\n * Experience developing, debugging, and maintaining applications using modern programming languages and frameworks.\n * Experience developing web applications, reusable components, and accessible user interfaces.\n * Working knowledge of RESTful APIs, service integration, and authentication approaches such as OAuth 2.0 or SAML.\n * Experience with relational databases, SQL, and application data validation and processing.\n * Familiarity with cloud application development, application migration, and scalable software design.\n * Experience with Git version control, code reviews, agile development, and continuous integration and delivery practices.\n * Ability to write automated tests, investigate defects, and document test results and technical changes.\n * Working knowledge of secure coding, vulnerability remediation, access controls, and protection of sensitive information.\n * Knowledge of Section 508 accessibility requirements and experience applying accessibility practices to software interfaces.\n * Strong analytical, communication, and documentation skills; ability to work independently on assigned development work and collaborate with senior technical staff.\n * Experience supporting Federal Government applications, cloud services, data pipelines, or approved AI/ML integrations is preferred.\n * Ability to meet DHS/CISA background investigation, EOD/fitness, and system access requirements and maintain required access throughout employment.\n