Top Senior Software Engineer Jobs in St. Louis, MO

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, 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.

Lead the design and implementation of scalable monetization systems while mentoring engineers and driving technical strategy for revenue growth.

As a Senior Associate, you'll design and develop microservices, build user-friendly UI components, and manage applications on Azure, leveraging AI tools while collaborating with various teams.

Design, build, deploy, and optimize scalable full-stack applications integrating databases, APIs, and AI/LLM workflows. Lead architecture, CI/CD (ArgoCD, GitLab), Airflow pipelines, and collaborate cross-functionally to deliver production-grade fintech solutions.

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.

As a Senior Mobile Software Engineer, design and build scalable mobile applications, collaborate with cross-functional teams, and enhance engineering quality.

The Senior Backend Engineer will develop data collection applications, design architecture, create APIs, manage databases, and collaborate with teams to enhance software solutions.

As a Full Stack Software Engineer, you will develop tools for cloud management, build APIs and UIs, and maintain cloud systems.

As a Backend Engineer, you will design and implement core infrastructure for Vannevar's platform, ensuring standards for data processing, security compliance, and performance. You will collaborate with various teams to enhance shared infrastructure and lead technical initiatives.

As a Senior Full-Stack and Platform Software Engineer at mabl, you will develop features for an AI-powered test automation platform, enhancing user experiences, designing APIs, and optimizing data pipelines while collaborating with cross-functional teams.

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

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.

The Senior Full-Stack Software Engineer will design, build, and scale SaaS products, improve application performance, and lead technical initiatives. Responsibilities include modernizing web applications, contributing to backend services, and mentoring other engineers.

The role involves leading projects as a full-stack engineer, focusing on SaaS products, enhancing user experiences, and building accessible software.

As a Software Engineer/Senior Software Engineer, you'll design, develop, and maintain high-quality software solutions, focusing on API development and technical excellence while collaborating with teams.

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 Full Stack Software Engineer will design, develop, and maintain AI-powered applications, collaborating with cross-functional teams to create seamless user experiences.

The Senior Marketing Engineer will develop Eve's marketing website and data infrastructure, automate lead generation, and optimize marketing operations using engineering and AI techniques.

The Principal Software Engineer will define technical roadmaps, guide system architecture, mentor leaders, and drive product direction in Capital Supply operations.

The role involves designing and building scalable software for Dropbox, collaborating with product teams, mentoring engineers, and ensuring service operations.

Lead system-level integration, verification, and validation of software/hardware mission systems using DevSecOps, CI/CD, containerized deployments, and cloud-native test environments. Develop and maintain requirements and traceability, define test strategies and acceptance criteria, analyze results, drive corrective actions, and mentor junior engineers. Ensure interoperability, performance, and mission assurance in secure DoD environments.

The Senior Software Engineer will develop, optimize, and maintain systems for the Capital Marketplace, collaborating across teams to enhance services for investors and stakeholders.

Lead the frontend platform's evolution, architect complex UIs, mentor engineers, and drive performance and testing excellence while collaborating with cross-functional teams.

Lead engineering team to design, analyze, test, and certify aircraft software per FAA standards (DO-178B/C). Act as FAA liaison, oversee technical documentation for certification, mentor staff, resolve complex engineering issues, and ensure on-time delivery of safety-critical certification milestones.