Top Senior Software Engineer Jobs in St. Louis, MO

Design and implement high-performance Rust software systems for military applications, ensuring reliable deployments and integration with hardware. Collaborate across teams to optimize performance and support mission-critical functions.

Lead remote engineering teams to design, architect, and deliver scalable, high-availability education technology platforms focused on content systems, workflows, and GenAI. Drive product and technical strategy, collaborate with product/design, implement cloud-native architectures, adopt agile practices, measure performance through data and testing, and continuously improve user engagement and platform reliability.

Design, build, and enhance Cority's software platform across product streams. Own features end-to-end, debug cross-system issues, drive observability, contribute technical direction, perform code reviews, mentor junior engineers, and collaborate with Product Owners to translate requirements into scalable technical designs.

Design, develop, modernize, test, and support enterprise healthcare applications on the IBM i platform. Own complex enhancements and production issue resolution, improve legacy RPG code and Db2 for i performance, participate in architecture and release processes, mentor junior developers, and collaborate with cross-functional teams.

Lead architecture and development of high-performance, scalable backend systems for Yahoo Mail using Java and C++. Set technical strategy, establish architectural standards, validate AI-generated code, mentor senior engineers, collaborate cross-functionally, and ensure reliability through automated logging, telemetry, and debugging workflows.

Lead frontend development of production web applications using Svelte and other frameworks. Build reusable components, integrate REST/GraphQL APIs, ensure UI/UX quality, accessibility, and performance. Lead a small team, coordinate releases with QA, write tests, follow Git and CI/CD workflows, and collaborate remotely with stakeholders across the US.

The Senior Software Engineer will design and build scalable technology platforms, contribute to architectural decisions, and apply strong security practices in a collaborative environment.

Lead front-end development within full-stack teams, building accessible React/Next.js applications, partnering on authentication, ensuring WCAG/ARIA compliance, mentoring engineers, and supporting delivery continuity.

Design, build, test, and deploy features for high-traffic web applications across multiple sports reference sites. Work full-stack on CI/CD pipelines and data ingestion, own features/systems, triage production issues, mentor peers, and contribute to technical planning and security/compliance improvements.

Seeking a Lead Software Engineer with 5+ years of experience in software development and 1-2 years in a leadership role, focusing on full-stack development and modernization initiatives in a cloud environment.

Resolve complex customer escalations by diagnosing production issues, delivering end-to-end code fixes, using AI-assisted debugging tools, documenting solutions, contributing to knowledge bases, and providing occasional after-hours pager support.

Design, implement, deploy, and operate scalable backend services, data pipelines, and cloud infrastructure. Influence architecture, mentor engineers, collaborate with data science and product, and improve engineering practices and code quality.

Lead design and development of legacy and modern systems, stabilize and migrate VB6/PHP/MySQL stack to .NET Core and Azure, build ASP.NET Core APIs, support database migrations to SQL Server/Azure SQL, containerize with Docker, maintain Sitecore components, implement CI/CD with GitHub Actions, enforce security best practices, and mentor developers while applying AI-assisted tools.

Develop and maintain language frontends for the Joern platform for automated software vulnerability analysis, collaborating with a global team.

As a Senior Software Engineer, you will lead your team in delivering features according to specifications, ensuring scalable technical decisions, and mentoring team members.

As a Staff Software Engineer, you will lead technical initiatives for the Core Platform team, focusing on infrastructure and security systems to enhance developer productivity and reliability.

The Sr Software Engineer will design, code, test, and document software solutions, lead technical aspects, and support integrations with various IT teams.

The Staff Software Engineer will lead AI integration into software design, develop scalable systems, and mentor other engineers while improving best practices.

As a Senior Software Engineer, you will maintain and develop data connectors, enhance data integrations, and improve developer experience within the ClickHouse data ecosystem.

The Senior Software Engineer will develop orchestration and autoscaling for the Lucenia search platform, working with cloud technologies and Kubernetes to manage services and mentor team members.

The Senior Software Engineer will focus on Lucene's distributed indexing and query capabilities, improve code features, and collaborate with a global team.

As a Senior Software Engineer, you will build and manage features for cloud-based public safety software while collaborating with cross-functional teams and ensuring code quality through best practices.

Design, develop, test, and own SDKs and REST APIs for a next-generation analytics platform. Collaborate with Product Management, contribute to DevOps and quality frameworks, perform code reviews, and mentor teammates to deliver performant, well-tested software.

As a Senior Software Engineer, you will develop product features end-to-end, collaborate with teams, and improve developer productivity.

The Senior Software Engineer will lead frontend development using React for Afresh's AI grocery platform, mentoring engineers and collaborating across teams to enhance web solutions.