Software Engineer Jobs in St. Louis, MO

Paid, full-time software engineering internship supporting the SOC Operational Intelligence team. Responsibilities include developing Python data pipelines and packages, contributing to internal web applications, supporting AI agents and bots, writing automated tests, and improving developer tooling. The intern will work on production software, ETL pipelines, operational automation, and integrations with systems such as Jira, Ivanti, and Datadog while participating in mentorship, networking, professional development, and team projects.

Paid, full-time software engineering internship supporting workforce management, technician scheduling, and dispatch tools. Interns will build features across web applications, APIs, databases, and cloud services; use AI-assisted development and pattern analysis; and participate in the full software development lifecycle. The program also includes mentorship, professional development, networking, community service, and final presentations.

Paid, full-time software engineering internship supporting Salesforce and CSML development, system integrations, testing, troubleshooting, automation, configuration, technical documentation, and product workflow changes. The intern will contribute to backlog refinement and sprint deliverables under supervision while participating in professional development, mentorship, networking, and cohort activities.

Paid, full-time software engineering internship supporting Netcracker CPQ configuration and development. Responsibilities include analyzing Salesforce and downstream integrations, testing and troubleshooting changes, documenting product configurations and workflows, and assisting with sprint deliverables under supervision. The intern will gain experience with CPQ engineering, pricing logic, order management, and telecommunications systems while participating in mentorship, professional development, and networking activities.

Software Engineer Intern supporting the ERP Finance team by designing, developing, optimizing, integrating, and maintaining financial applications using Java and Oracle. The role includes improving system reliability and scalability, connecting applications with Spectrum platforms and data sources, and participating in Agile and Scrum processes. Interns also attend professional development, networking, mentorship, community service, and presentation activities throughout the 11-week program.

Paid, full-time software engineering internship supporting customer-context data patterns, decision-engineering tools, requirements analysis, and data-platform product development. Interns spend approximately 80% of their time on department projects and 20% on professional development, networking, mentorship, community service, and presentations. The role runs for 11 weeks during summer 2027.

Paid, full-time software engineering internship supporting a payments engineering team. The intern will learn payment processing, participate in the software development lifecycle, practice AI-assisted development, explore monitoring tools, shadow production operations, and join stand-ups and code reviews. The program also includes mentorship, networking, professional development, and cross-functional activities.

Develop and maintain features for a large-scale Windows desktop CAM application using C and C++. Diagnose defects, enhance existing code, participate in code reviews, write tested software, document technical knowledge, and collaborate with senior engineers. The role requires learning CAM and manufacturing concepts while applying modern software development practices in a mature codebase.

Develop backend services and metadata pipelines for a data management and governance platform. Responsibilities include integrating relational databases, building REST services with Python, Java, and Node.js, implementing Terraform infrastructure, supporting containerized deployments and GitLab CI/CD, and writing comprehensive tests. The role also focuses on pipeline reliability, scalability, orchestration, observability, security, and AI/ML data workflows involving metadata, search, and LLM applications.

Participate in the full software development lifecycle for high-performance, low-latency financial data processing applications. Responsibilities include software design, development, testing, secure coding, version control, adopting new technologies, and completing projects collaboratively. The intern will work with Python, C, C++, Linux, GitLab, Jenkins, Artifactory, Jira, Agile, and CI/CD practices in a hybrid St. Louis environment.

As a Mission Software Engineer, you'll develop solutions for government customers by integrating software into existing workflows, requiring significant travel, collaboration, and technical expertise.

Develop full-stack software solutions from concept through production in an agile environment. Design, modify, and implement applications using front-end and back-end technologies; create source code, integrate APIs and databases, troubleshoot issues, automate workflows, and contribute to architecture and system improvements. Collaborate with teams and federal clients to solve complex problems and support future enhancements. An active TS/SCI clearance and willingness to complete a polygraph are required.

Develops, tests, debugs, documents, and maintains software supporting intelligence and geospatial data management applications. Plans and coordinates software development activities, applies standards throughout the development lifecycle, resolves program errors, and analyzes system capabilities. The role requires experience with multi-tiered or microservice applications, cloud platforms, containerization, CI/CD, scripting, and Linux, plus an active TS/SCI clearance and ability to obtain a counterintelligence polygraph.

Develop responsive front-end interfaces for an ERP system using JavaScript, React.js, HTML, and CSS. Integrate RESTful APIs with PostgreSQL backends, translate UI designs into functional applications, support API contracts and testing, collaborate on CI/CD and containerized environments, document technical work, and maintain reusable components and libraries.

Lead enterprise backend software design, development, deployment, modernization, and sustainment. Architect AWS-based containerized applications and DevSecOps pipelines, integrate geospatial systems, establish technical standards, mentor developers, supervise teams, and guide complex client technology assignments. Support agile delivery, automation, testing, proposal development, technical documentation, and client briefings.

Leads the design, development, deployment, modernization, and sustainment of enterprise backend services and cloud applications. The role includes architecting DevSecOps pipelines, scaling AWS containerized systems, integrating geospatial solutions, establishing technical standards, mentoring developers, and improving project outcomes. It also supports client engagement, proposal writing, technical briefings, and development of specialized spatial analysis tools and algorithms.

Seeking a Mid Level Software Engineer to develop enterprise applications using Java, JavaScript, or Python, along with database design and micro-service architecture expertise.

Develops and maintains virtualized application packages for Citrix and VMware VDI environments supporting Intelligence Community missions. Validates applications, manages user settings and sequencing, configures application delivery infrastructure, troubleshoots VMware environments, applies patches, improves disaster recovery, resolves incidents, and creates technical documentation and training materials. Requires expertise in VDI, Citrix application virtualization, systems administration, security practices, and automation.

Lead architectural modernization of enterprise .NET applications into cloud-native microservices. Define technical strategy, cloud architecture (AWS/GCP), DevSecOps/CI-CD, mentor engineers, drive API-first and front-end modernization, and align technology with business goals.

Design, build, and maintain Optimizely CMS-based headless sites with Next.js/React front ends. Implement GraphQL/REST APIs, DAM integration, CI/CD on Azure, and performance, SEO, and accessibility optimizations. Collaborate with product owners, designers, and developers; participate in code reviews, testing, and debugging to deliver scalable digital experiences.

Develop, test, and maintain web-based geospatial intelligence applications using Java/Python. Design features, integrate relational and NoSQL data, apply secure coding, participate in Agile sprints, code reviews, and CI/CD. Support performance tuning, documentation, and mentor junior developers in a classified environment.

Design, develop, test, and maintain software for the Tomahawk program, translating customer requirements and ensuring product reliability. Requires 5+ years experience in .NET and SQL, with a Secret clearance.

As a Software Engineer in Frontier AI Infrastructure, you'll design secure systems for the public sector, improve engineering standards, and collaborate with cross-functional teams to meet government requirements. You'll also participate in customer engagements and contribute to the product strategy while ensuring compliance with federal regulations.

Leads software quality engineering for healthcare data applications. Develops and executes manual and automated tests, analyzes large datasets and test results, reports defects, creates automation frameworks and scripts, reviews clinical definition manuals, mentors quality engineers, and contributes to Scrum planning, estimation, test strategy, and standardized quality metrics.

As a Senior Software Engineer, you'll design and implement cloud-native solutions using TypeScript, React, and NestJS while optimizing performance on Azure. Responsibilities include developing APIs, conducting code reviews, and ensuring software quality through testing, working collaboratively within an agile team.