Top Software Engineer Jobs in St. Louis, MO

The Senior Software Engineer will develop and maintain big data applications, focusing on distributed computing, automation, and collaboration with teams to enhance healthcare solutions.

The Senior Software Engineer II will architect, build, and operate core services for the company's cloud infrastructure. Responsibilities include designing scalable platform services, leading operational design for reliability, building automation for self-healing systems, and collaborating across engineering and security teams.

The Principal Software Engineer will provide technical and architectural leadership in data engineering, focusing on strategy, innovation, and ensuring successful production deliveries while fostering teamwork and mentoring.

Develop core backend components for a blockchain network, focusing on reliability and scalability, mainly using Rust. Ensure code quality through testing and debugging.

Lead the redesign of Mozilla's IAM system, focusing on user experience and scalability while guiding technical decisions and promoting best practices.

Lead the redesign of the IAM system at Mozilla, focusing on scalability and user experience while promoting best engineering practices and collaboration across teams.

Senior Software Engineer will design, build, and maintain TypeScript/Node.js microservices and Angular frontends, use AWS/serverless and CI/CD pipelines, optimize databases and participate in Agile processes while adopting AI-assisted development tools.

Design, build, and deploy scalable cloud-based solutions; translate product requirements into technical architecture; contribute to roadmaps, code, and reviews; shape engineering practices and culture in a fast-paced startup.

As a Principal Software Engineer, you'll lead complex projects, build scalable systems, and integrate EHRs while driving technical improvements and collaborating with cross-functional teams.

The role requires aSenior Software Engineer to develop and manage product features, including backend systems and APIs predominantly using Python and SQL, and contribute to frontend development when necessary.

As a Backend Engineer, you'll shape the backend systems of a financial platform, focusing on high-volume, high-availability solutions. Responsibilities include optimizing CI/CD pipelines, maintaining code quality, and ensuring system observability.

The Senior Software Engineer will develop features for Phantom's web platforms, lead new product initiatives, interface with users, and contribute to team culture.

Design, build, and scale backend systems for a publishing platform. Lead development, ensure system health, and promote engineering standards.

Design, build, and maintain high-performance Python and React services. Mentor junior engineers and collaborate with cross-functional teams to enhance patient care solutions.

As a Senior Software Engineer, you'll design modern scalable platforms, focusing on front-end and back-end development using VueJS/ReactJS and C# microservices, while integrating with AWS and modern data warehouses.

The Senior Software Engineer will build and operate systems for Vanta's FedRAMP environments, focusing on reliability, compliance, and incident response, while collaborating with product teams and improving operational readiness.

As a Senior Software Engineer, you will develop solutions for improving support agent experience, focus on backend components, and collaborate with cross-functional teams.

Lead architecture and re‑architecture of high-scale B2B systems, design batch and real-time data pipelines, optimize multi‑terabyte databases, mentor engineers, champion observability and DevOps practices, and drive cross-team initiatives for scalability and reliability.

Design, build, and maintain scalable cloud infrastructure and CI/CD pipelines using Pulumi (or Terraform). Automate deployments, improve observability, optimize cloud costs, enhance security and developer experience, and collaborate with engineering teams and the open-source community.

As a Senior Software Engineer, you will develop scalable applications, collaborate with teams, and improve code quality while maintaining backend system reliability.

As a Staff Software Engineer, you will lead engineering teams, collaborate cross-functionally, drive technical initiatives, and contribute to code while ensuring system resiliency.

Design, build, and maintain scalable identity and access management services (authentication, authorization, provisioning). Lead architecture, mentor engineers, ensure security/compliance, optimize reliability, support production systems (on-call), and collaborate across product and security teams.

Lead development of Dutchie’s cross-platform mobile apps using Flutter, delivering customer-facing features from design through deployment. Optimize performance, accessibility, and cross-platform consistency, collaborate with product and design, improve code quality and developer experience, and act as a technical leader on the mobile team.

Lead front-end development for the Brands team: design and implement React/TypeScript UIs, ensure comprehensive testing and monitoring, collaborate on product definition, and iterate from customer feedback. Mentor peers and improve team processes.

Lead design, build, and maintain CRM and MarTech integrations and services; lead technical discovery and execution; mentor engineers; collaborate with marketing and cross-functional teams; ensure system stability and participate in on-call rotations.