Top Software Engineer Jobs in St. Louis, MO

The role involves designing, developing, testing, and maintaining non-embedded software for air domain missions, leading junior engineers, and conducting integration testing.

Develop, test, and maintain mission-planning weapon software within a SAFe Agile scrum team. Translate requirements into designs, implement and integrate microservices (C#/C++ back end, JavaScript/TypeScript/React front end), debug issues, write documentation, and perform unit/integration/system-level testing and validation.

Design, develop, test, and maintain embedded software for weapons programs. Translate requirements into software designs, create interfaces, perform unit/integration testing, participate in peer reviews, support system integration and test, and produce software documentation.

The Software Engineer will design and develop simulation software, perform testing and analysis, and support various engineering teams in simulation integration.

Design, develop, test, and maintain embedded software for weapons programs. Translate requirements into designs, develop interfaces, perform unit/integration testing, support system integration, participate in peer reviews, and create documentation while meeting safety, security, and regulatory standards.

Missions Systems Software Engineers develop embedded software, working through the software development life-cycle including design, implementation, testing, and integration, within an Agile environment.

The Software Engineer will develop and maintain software systems for the F-15 Mission Systems, focusing on real-time embedded software, collaborating in Agile teams, and integrating various aircraft functionalities.

Design, develop, test, and maintain full‑stack web applications, databases, and data processing tools for model‑based sustainment simulations. Collaborate with stakeholders, lead or contribute to planning and code reviews, troubleshoot and optimize software, improve processes and documentation, and mentor junior engineers in an agile, mission‑critical aerospace environment.

The Associate Software Engineer role involves software development for defense applications, participating in design, development, testing, and maintenance while using Agile methodologies.

The role involves designing, developing, and maintaining non-embedded software for the Tomahawk program, ensuring compliance with industry and government standards.

Lead design and implementation of backend systems for Model-Based Engineering web applications. Build APIs, data-processing and analytics pipelines, optimize SQL, develop production-ready infrastructure, create test suites, mentor engineers, participate in architecture and tech selection, and ensure scalability, resilience, and performance for large-scale distributed systems.

The Software Engineer will develop, integrate, and maintain vehicle management system software, focusing on real-time embedded systems, while providing technical leadership and mentoring teammates.

Develop, integrate, and test Vehicle Management System software for aerospace platforms. Create architectures, algorithms, interfaces, and documentation; execute SDLC tasks, verification and test procedures; provide technical leadership, mentor teammates, and support software processes and metrics. Work under general direction on safety/flight-critical and real-time systems.

Develop, integrate, test, and maintain real-time Vehicle Management System software for aerospace platforms. Produce architectures, requirements, algorithms, and verification artifacts; lead technical efforts, mentor team members, and ensure compliance with safety and industry standards.

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.

The Software Developer will design, develop, and maintain software solutions for engineering and manufacturing teams, collaborating with stakeholders and participating in Agile processes.

The Software Engineer develops and maintains flight and subsystem control software for fighter programs, participating in the full development lifecycle including requirements, testing, and troubleshooting.

Design, build, and maintain scalable, reliable full‑stack systems. Contribute to API and architecture design, write testable code, debug complex issues, improve performance, automate deployments, and mentor junior engineers while collaborating with cross‑functional teams.

Design, build, and maintain scalable, reliable systems and APIs across a primarily TypeScript stack. Deliver features independently, improve performance and observability, contribute to architecture and CI/CD, debug complex issues, and mentor junior engineers while collaborating with cross-functional teams.

Build and maintain scalable integration and end-to-end test automation frameworks, optimize CI pipelines and test execution, improve test stability and reporting, support engineering teams with triage and best practices, write technical specs/ADRs, participate in on-call rotation, and collaborate cross-functionally to evolve the company test strategy.

Senior technical leader for fraud platforms responsible for architecture, resiliency, and scalable designs. Hands-on coding, solution decomposition, CI/CD, observability, test automation, incident RCA, and guiding multiple Agile teams for platform modernization and operational excellence.

Develop and implement full stack features for a healthcare platform, focusing on both frontend (React) and backend (Node.js) development. Responsible for performance optimization, API creation, testing, and collaboration with data engineering teams.

Design, architect, implement, and test simulation software and virtual environments for flight trainers. Lead integration, validation, and documentation of simulation models, mentor junior engineers, support proposals, and work within agile teams to deliver simulation subsystems and tooling for training systems.

Develop software for autonomous systems, leading junior engineers, and performing software testing and integration. Must adapt to new environments and technologies.

Design, develop, test, and maintain embedded application software for air-domain missions. Translate customer requirements into software architecture, perform unit/integration testing, support system integration and verification, participate in peer reviews, and produce software documentation while meeting safety, regulatory, and customer standards.