Top Senior Software Engineer Jobs in St. Louis, MO

The Software Engineer will troubleshoot user inquiries, implement current technologies, and document research and development projects.

The role involves developing software for a Vehicle Management System, providing technical leadership, and ensuring compliance with industry standards. Requires 5+ years in C/C++ and safety-critical development.

The role involves leading the design, development, testing, and maintenance of embedded software for real-time systems, while managing projects and mentoring junior engineers.

Develop, validate, and maintain simulation models, visualizations, and frameworks. Integrate simulation software with hardware, collect/process data, execute tests, document results, and modernize legacy simulation systems while collaborating with stakeholders and cross-functional teams using Agile practices.

The Senior iOS Engineer will enhance the design system by building reusable iOS components, collaborating with cross-platform teams, and ensuring accessibility, performance, and documentation standards are met.

Design, maintain, and evolve core backend systems and APIs. Collaborate with product teams to create durable and reusable systems while enhancing performance and security.

Design and implement scalable web applications, modernize user experience, build mobile apps, mentor engineers, and collaborate with product teams.

The role involves building full-stack products for fleet safety, collaborating with teams, and maintaining production systems while utilizing a variety of technologies.

The role involves developing the BLE implementation on mobile products, collaborating with cross-functional teams, mentoring junior developers, and ensuring high-quality code delivery in a fast-paced environment.

Design and build scalable software services, collaborate with teams to achieve product vision, and write high-quality code for user needs.

Design, implement, integrate, and test real-time embedded software for the F-15 Operational Flight Program. Develop architectures, algorithms, interfaces, verification plans, and documentation while working on Agile scrum teams and supporting software integration and troubleshooting.

Develop and maintain software systems for Vehicle Management Systems at Boeing, ensuring safety and flight critical functionality, while providing technical leadership and mentoring to team members.

Design and build security controls for MongoDB Atlas multi-cloud infrastructure. Collaborate with teams to ensure highest security standards and lead projects on scalable security services.

Join Terakeet as a Senior Backend Software Engineer to design, build and maintain scalable backend services and APIs using Python, focusing on databases and best coding practices.

Lead the Model-Based Engineering Software (MBSE) team at Boeing, focusing on backend software development, architecture, and mentoring while optimizing infrastructure and processes.

Build enterprise-grade authentication, authorization, and identity features across the full stack. Design and implement RBAC, provisioning (SCIM), SSO/OAuth integrations, secure public APIs, and admin workflows for auditing and compliance. Own end-to-end product changes, collaborate on architecture, and mentor engineers to deliver scalable, reliable systems for enterprise customers.

The Senior Backend Software Engineer will enhance youth sports applications by building scalable backend services, improving user experiences, and collaborating with cross-functional teams while ensuring system reliability and performance.

The role involves shipping quality code, managing end-to-end projects, collaborating to improve user experiences, and scaling billing infrastructure and analytics.

The role involves shipping full-stack AI projects, designing experiments for AI features, and optimizing AI infrastructure while collaborating with teams.

The role involves leading features and full stack development of the payment and billing systems, integrating payment solutions, and optimizing user experiences.

Lead design and implementation of AWS-based infrastructure and CI/CD for a secure, scalable clinical data platform. Build IaC, automate releases and testing, operationalize MLOps, mentor engineers, troubleshoot distributed production issues, and ensure observability, compliance, and disaster recovery.

Lead design and scaling of automated test frameworks across UI, API, integration, and performance layers. Integrate AI-enabled test generation and monitoring, embed tests in CI/CD pipelines, ensure audit-ready documentation for GxP/21 CFR Part 11 compliance, and collaborate with Engineering, DevOps, and Quality to increase automation coverage and release confidence.

As a Principal Mobile Software Engineer, you'll lead mobile platform development, scale React Native architecture, mentor engineers, and collaborate across teams to build impactful features.

The Senior Back-End Software Engineer will maintain and modernize the Rails stack, improve internal tools, reduce third-party dependencies, and ensure infrastructure scalability.

The Senior Full Stack Engineer will design and develop user-friendly experiences, lead product enhancements, mentor junior engineers, and participate in on-call rotations to ensure service reliability.