Top Software Engineer Jobs in St. Louis, MO

Develop and maintain C++ autonomy services for manned, unmanned, and autonomous aircraft programs. Build containerized services in Linux, implement OMS/UCI interfaces, integrate software across simulation and flight environments, and support testing, code reviews, CI/CD, DevSecOps, documentation, and Agile development. The role applies software engineering, AI/ML, robotics, and defense mission-system concepts to aerospace applications.

Designs, develops, tests, integrates, debugs, and sustains non-embedded software for military platform health management systems. Translates customer requirements into software architectures and implementations, supports CI/CD and Agile development, manages interfaces and documentation, troubleshoots user issues, improves software processes, and contributes to research, project management, supplier oversight, compliance, and certification activities.

Develops and leads software design, coding, testing, integration, requirements traceability, code reviews, verification, and deployment for Boeing Phantom Works solutions. The role collaborates with stakeholders, resolves technical risks, evaluates team and supplier performance, and mentors junior engineers. Work involves Java or C++, MATLAB, DevSecOps tools, Agile development, and complex space-based mission applications. An active Top Secret clearance and U.S. person status are required.

Develops, integrates, tests, and maintains simulation software for aerospace nondestructive inspection systems. Responsibilities include robotics motion modeling, visualization, virtual environments, data processing, software verification and validation, systems integration, legacy modernization, documentation, and agile development collaboration. The role supports mission-critical government and commercial aerospace platforms and requires onsite work, U.S. person status, and eligibility for a Secret clearance.

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 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.

Design, architect, and develop simulation models, virtual environments, and frameworks. Validate, integrate, modernize, and test simulation software and legacy systems, collect and process data, document algorithms and specifications, and collaborate with cross-functional teams to enable system integration and optimize performance in a secure Agile environment.

Develops and maintains simulation models, visualizations, virtual environments, and infrastructure supporting F-22 software and hardware development and testing. Responsibilities include requirements analysis, simulation design, coding, data processing, verification and validation, test execution, documentation, hardware integration, and modernization of legacy systems. The role collaborates with cross-functional engineering teams in an agile environment and supports real-time simulation frameworks, operating systems, networks, and emerging technologies.

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.

Develops and maintains safety- and mission-critical embedded flight software across the full software lifecycle, including requirements, architecture, coding, hardware integration, testing, debugging, verification, and documentation. Works in Agile integrated product teams and CI/CD DevSecOps environments, supporting capabilities such as sensor fusion, mission management, fire control, tactical communications, and supplier integration. The role also involves embedded software performance analysis, systems integration, compliance tracking, and project management functions.

Develops and maintains digital engineering tools, software pipelines, CI/CD solutions, tool plugins, and program metrics. Collaborates with engineering teams to define requirements, designs and implements software solutions, tests releases, triages defects, and delivers fixes. The role supports Boeing defense programs and requires full-time onsite work in Berkeley, Missouri, U.S. citizenship, security clearance eligibility, and special program access.

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 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.

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.

Supports mission planning software development across the full lifecycle, including design, development, integration, testing, maintenance, debugging, troubleshooting, architecture, requirements, algorithms, interfaces, and process improvement. The role supports systems integration efforts for defense programs and requires collaboration in an Agile environment. Candidates need software development experience with C# and .NET, version control experience, a bachelor’s degree, and the ability to obtain a U.S. Secret Clearance.

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.

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.

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

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.

Own the development and maintenance of large-scale React Native applications for iOS and Android. Lead architecture improvements, React Native upgrades, native module development, performance optimization, automated testing, CI/CD reliability, and production debugging. Collaborate with cross-functional product pods, contribute to technical discovery and architecture, mentor engineers, and raise engineering standards while delivering scalable, maintainable mobile experiences.

Design, build, and operate foundational developer infrastructure across CI, build systems, deployment orchestration, and test platforms. Improve build speed, deployment safety, and test reliability while owning services end to end, including SLOs, observability, and on-call responsibilities. Partner with engineering teams to address platform pain points and lead cross-cutting technical projects through production.