Software Engineer Jobs in St. Louis, MO

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.

As a Software Engineer, you will design, develop, and integrate capabilities in a complex system while collaborating with team members to deliver impactful solutions.

Lead Site Reliability Engineer responsible for driving stability, resiliency, performance, and security of enterprise platforms. Define SLIs/SLOs, implement observability and automation, lead incident management and toil reduction, advise leadership, enforce reliability standards, and collaborate across development, product, and operations to ensure high availability and continuous improvement.

Lead and deliver moderately complex software initiatives across the Investment Solutions team. Design, code, test, debug, and document solutions; review technical challenges; resolve issues; mentor junior staff; collaborate with product owners, architects, QA, and business stakeholders; support deployments and platform improvements while leveraging AI-assisted development tools.

The role involves designing, developing, and maintaining backend services including APIs for payments, subscriptions, and integrations, while collaborating closely with cross-functional teams.

As a Full Stack Software Engineer, you will develop and maintain cloud services, collaborate in Agile development, and ensure code quality while integrating software with geospatial intelligence.

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.

As a Senior iOS Engineer, you'll lead engineering decisions, ship production code for the Speechify iOS app, and enhance the existing app architecture, all while contributing to a high-growth, fast-paced startup.

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.

Develop, deploy, and maintain cloud-based full-stack applications for defense customers using AWS services. Write code in C#, Java, JavaScript/TypeScript, and Python; implement APIs and database integrations; apply DevOps, CI/unit testing, and GitLab workflows; integrate open-source visualization tools into React/Redux web apps; participate in Agile ceremonies and collaborate to deliver features meeting acceptance criteria.

Design, develop, test, and maintain web-based geospatial intelligence applications using Java and/or Python. Integrate relational and non-relational data stores, apply secure coding practices, participate in Agile sprints, conduct code reviews and testing, support performance tuning, and mentor junior developers while maintaining required security clearance.

Senior AI Software Engineer responsible for designing, developing, and deploying generative AI, LLM-powered, and agentic AI systems. Lead system architecture, implement secure cloud-native deployments and CI/CD, collaborate cross-functionally, monitor and optimize production AI, mentor engineers, and enforce technical rigor and documentation for mission-focused federal solutions.

Design, implement, and operate hybrid on-prem/AWS cloud and edge platforms. Maintain OpenShift/Kubernetes environments, integrate AI, perform trade studies, ensure security/compliance, document architectures, and mentor engineering teams.

As a Software Engineer for the ARC team, you'll design and implement secure backend systems, manage model inference layers, improve engineering standards, and collaborate with teams to meet government agency needs.

Design and implement cloud-native backend systems for federal customers enabling agentic AI capabilities. Build data pipelines, optimize retrieval, create guardrails and agent orchestration, define requirements with stakeholders, and participate in customer engagements to deliver secure production features.

As a Full Stack Software Engineer, you will develop and deploy software systems for DoD clients, enhancing operational capabilities and cybersecurity.

Design and develop software modules in C++, perform unit and integration testing, and partner with QA. Must have 3+ years experience and strong Linux skills.

Design, develop, test, and deploy scalable backend-to-UI applications using modern practices (microservices, serverless, CI/CD, IaC). Leverage AI-assisted coding and LLM tools to accelerate development, write unit tests and documentation, participate in estimations and architecture discussions, triage and resolve performance or production issues, and collaborate in an agile team.

As a Software Engineer, lead full-stack development, mentor engineers, and design secure microservices for geospatial applications. Collaborate with teams to meet compliance and performance needs.

Lead VDI/System Architect responsible for deploying and maintaining Azure Virtual Desktop (AVD) VDI solutions, patching and monitoring AVD infrastructure, automating deployments with PowerShell, managing AVD images and host pools, supporting Windows ZTI, documenting processes, mentoring colleagues, and coordinating risk tracking and remediation.

Embed with U.S. government customers to design, build, deploy, and maintain mission software from prototype to production. Own end-to-end delivery, build backend systems and data integrations, collaborate with product and engineering to scale reusable capabilities, and serve as the technical point of contact to drive adoption and mission impact.

Design, develop, and maintain secure, scalable full-stack web applications across backend, APIs, and frontend. Collaborate with product and design, perform code reviews, mentor engineers, troubleshoot complex issues, and drive continuous improvement and AI-enabled solutions throughout the SDLC.