Top Software Engineer Jobs in St. Louis, MO

Develops, documents, maintains, unit tests, troubleshoots, and integrates software for F-15 Mission Planning systems. Uses C#, JavaScript, and SQL within software development environments, collaborates on technical solutions, compiles software components, and performs limited target-environment testing. Requires a bachelor’s degree, Git and object-oriented programming experience, and U.S. Secret clearance eligibility. The position is based in Missouri and does not offer visa sponsorship or relocation assistance.

Oversees approximately 60 DevSecOps and digital software engineers, defining software standards, guiding architectural decisions, translating requirements into team initiatives, and leading planning and rollout of tools, platforms, and engineering practices. Serves as the technical liaison among chief engineers, IPT leads, and development teams while mentoring engineers and improving delivery processes.

Designs, develops, tests, maintains, and integrates non-embedded software for the Tomahawk missile program. Translates customer requirements into software designs, resolves technical issues, supports users, implements modern development technologies, and documents software research and development while meeting safety, industry, and government standards.

Develop and deploy data solutions using Palantir Foundry and AIP for client engagements. Lead technical teams, coach team members, analyze system interactions, build applications with large datasets, and apply data engineering and analytics to deliver client outcomes. The role also includes managing client relationships, planning and executing projects, encouraging technology adoption, resolving stakeholder conflicts, and driving continuous improvement.

Design, develop, optimize and maintain ERP financial applications using Oracle and PL/SQL. Integrate systems, ensure security/compliance, resolve defects, lead code reviews, mentor junior developers, participate in Agile/Scrum, and estimate and deliver ERP features.

Designs, develops, tests, deploys, and maintains software applications and ETL pipelines. Builds Python-based data processing workflows, writes optimized Oracle SQL, generates standardized flat files, troubleshoots pipeline and application issues, and collaborates with product, data architecture, and quality teams. Maintains documentation, version control, and data governance standards while supporting healthcare data integration.

Serve as principal technical authority for a registered investment advisor platform. Define architecture and engineering standards, build Java, Spring Boot, and React.js components, lead backend services, APIs, frontend frameworks, resilient distributed systems, and third-party integrations. Mentor engineers and influence technical direction across teams while ensuring scalability, security, performance, observability, and compliance for custody workflows including trading, money movement, account opening, and portfolio management.

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.

Build and operate GitLab’s Rust-based Knowledge Graph backend supporting SDLC and code indexing, graph queries, MCP endpoints, AI agents, and analytics. Integrate with Rails, ClickHouse, NATS JetStream, and Data Insights systems. Improve reliability, observability, scalability, and operational readiness through testing, metrics, runbooks, alerts, and on-call participation. Collaborate asynchronously across product, data, infrastructure, security, and AI teams while contributing to system design and occasional Ruby or frontend work.

Build and operate Dragos’s web application, GraphQL and gRPC APIs, and client SDKs. Develop React and TypeScript features, design versioned API contracts, maintain Python, TypeScript, and Go SDKs, and collaborate with Product, Design, and backend engineering. Improve performance, accessibility, observability, security, testing, and code quality while supporting security data at scale.

Lead development of Toast’s consumer-facing web experiences, building scalable guest and restaurant features across the stack. Collaborate with frontend, backend, iOS, and Android engineers using React, TypeScript, Next.js, APIs, and backend services. Own projects from development through launch, monitoring, and analysis while experimenting with users and influencing consumer product strategy.

Leads and grows a distributed software engineering team responsible for developing and maintaining NinjaOne SaaS products. Provides technical direction, participates in architecture, code reviews, integrations, and deployments, and partners with product, platform, and project management teams. Oversees engineering operations, team mentoring, software quality, continuous improvement, and successful product delivery across UI, mobile, server, and agent systems.