Top Senior Software Engineer Jobs in St. Louis, MO

The Senior Software Engineer will own the development of full-stack features from UI to backend, mentor junior engineers, and drive technical decisions.

The Senior Backend Engineer will design and build scalable cloud-native backend systems for real-time monitoring and automation in HVAC operations, owning the entire lifecycle of services and mentoring junior engineers.

Own quality engineering for Commerce: run structured manual QA, build E2E automation (storefront, checkout, brand portal), wire tests into CI, define Shopify-specific compatibility playbooks, set quality metrics and gates, participate in planning and spec reviews, and lead the teamto shift coverage left.

The Staff Software Engineer will lead technical initiatives, drive quality code, mentor engineers, and work on scalable systems in a high-impact team environment.

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.

Seeking a Senior Elixir Engineer to develop scalable systems and contribute to technical decisions within product groups, focusing on Elixir and cloud technologies.

Design and develop scalable software applications, implement automated testing, mentor junior developers, and optimize performance in a remote environment.

As a Senior Software Engineer, you will design and develop user-facing products and back-office tools while collaborating with diverse teams to solve complex problems with innovative solutions.

Design and implement backend components for a distributed vector database, focusing on performance and reliability in high-throughput environments, utilizing C and C++, while collaborating on backend capabilities.

Lead design and implementation of the payment integrations platform (APIs, SDKs, embedded web), build scalable payment rails (ACH), drive technical roadmap, mentor engineers, collaborate cross-functionally, and improve operations via automation, tooling, and observability.

Design, build, test, and scale backend services and integrations (payments, billing, identity, partner integrations). Lead API design and production rollouts, build fault-tolerant systems and data pipelines, collaborate cross-functionally, and mentor peers to deliver frequent, iterative product improvements.

The role involves owning the email channel's infrastructure, developing frontend experiences, designing backend systems, and ensuring deliverability in a cloud-native environment.

As a Senior Software Engineer, you'll design and build distributed systems in Go, collaborate across teams, and ensure performance and reliability at scale.

As a Senior Software Engineer, you will work across the stack to create scalable and reliable systems for tracking freight intelligence, influencing architecture, mentoring, and collaborating with various teams.

As a Staff Software Engineer, you'll enhance the release and configuration systems across environments, optimize release pipelines, and provide tooling for reliable deployment, ensuring consistency and scalability while collaborating with various engineering teams.

As a Senior Software Engineer, you will lead the architecture and delivery of high-quality production code, improve software efficiency with AI tools, and ensure system reliability through integrations and monitoring frameworks.

Lead design, implementation, and deployment of open-source, cloud-native features (Zarf). Integrate with defense systems, own architecture decisions, mentor engineers, engage open-source communities, produce documentation, and drive product direction with a focus on Kubernetes, cloud, and secure software delivery.

Own and deliver reliable, secure software in a regulated healthcare environment. Drive solutions from ambiguity to production, build automation to reduce developer toil, mentor engineers, champion AI-assisted coding, and optimize database performance and schemas.

Design and build backend services and core user experiences for bank administrators and customers. Develop robust, well-tested REST APIs, integrate third-party services (e.g., Plaid, SendGrid), apply domain-driven design and microservice architecture, participate in system design, and provide technical guidance and code reviews within an agile SCRUM environment.

As a Staff Software Engineer, you will develop core banking experiences, craft user flows, build APIs, and integrate third-party software, ensuring high-quality, well-documented, and test-driven code.

Develop core experiences for bank users by creating user flows, building APIs, and integrating with third-party software. Advocate for architectural decisions and provide technical guidance to team members.

Develop core experiences for bank administrators and customers by writing clean, documented code, creating robust APIs, and integrating with third-party services.

The Sr Staff Software Engineer will build core banking experiences, craft user flows, robust APIs, and integrate with third-party software, requiring significant back-end development experience.

The Staff Software Engineer will develop user experiences and APIs for banking applications, focusing on code quality, system design, and team mentorship.

As a Senior Staff Software Engineer, you will lead the design and development of AI-powered products, mentor team members, and architect backend systems using Python and modern frameworks while ensuring code quality and optimizing performance.