Top Software Engineer Jobs in St. Louis, MO

The Senior Software Engineer leads the development of cloud-based software solutions, ensuring high-quality delivery, mentoring junior engineers, and refining technical processes.

Design and build core LLM platform primitives, safety and observability infrastructure, provider abstraction and evaluation systems, prompt lifecycle and Agent-as-a-Service; collaborate with product teams, document reference implementations, and lead technical standards to enable other engineers to build production AI features.

The Senior Software Engineer will write maintainable code, design systems, mentor others, and ensure projects align with business needs, utilizing Ruby on Rails, React, and databases.

As a Senior Software Engineer, you will lead design and implementation of scalable systems, solve complex problems, and mentor engineers.

The Software Quality Assurance Engineer will lead development activities, support feature completion, and drive non-functional requirements in a team focused on the 7750 Service Router.

Design and scale distributed systems for Ditto's edge-to-cloud capabilities, lead services development in Rust, and mentor engineers.

Design and develop functionalities for the Agents framework, iterate on feedback, and create documentation while working with various programming languages.

The Senior Software Engineer will architect and optimize AI-powered developer tools, enhance the SDLC, collaborate across teams, and mentor peers to improve engineering productivity.

Lead the technical direction for the engineering team, architect systems, design APIs, and mentor engineers while improving backend infrastructure.

Lead technical direction and contribute to the frontend codebase, building user-facing tools and mentoring team engineers to enhance user experiences.

The Senior Software Engineer will build backend systems, collaborate with customers, drive product features, and enhance AI automation at Acai Travel.

As a Senior Android Engineer, you'll develop new features for the ClassPass mobile apps, emphasizing collaboration, code quality, and user-friendly design.

The Staff Software Engineer will lead projects, mentor team members, write code using Python, Django, React, JavaScript, and TypeScript, and impact the healthcare system with software solutions.

As a Senior Software Engineer at Medallion, you'll lead projects, mentor team members, and work with technologies like Python, Django, React, and TypeScript to impact healthcare operations.

The Lead Software Engineer will architect and evolve OfficeSpace's AI platform, focusing on full-stack systems, AI features, and mentorship while ensuring performance, reliability, and security.

As a Senior Software Engineer, you'll design and maintain frontend applications and reusable components, integrate APIs, mentor engineers, and ensure high-quality user experiences in the fintech space.

The Principal Software Engineer will lead architectural direction, integrate AI capabilities, mentor engineers, and tackle complex technical challenges for scalable systems.

The Principal Software Engineer will architect and oversee the development of distributed systems, mentor engineers, and drive architectural initiatives for large platforms.

As a Senior Software Engineer at Flex, you'll design and maintain financial services architecture, mentor junior engineers, and ensure scalability and security for innovative financial products.

The Lead Software Engineer for Mobile iOS will design, test, and deliver applications, oversee software maintenance, collaborate on mobile experiences, and mentor junior engineers, utilizing Swift and modern Apple frameworks to enhance user experiences.

Build and improve the end-to-end experience for new customers by implementing features across Python services, a GraphQL gateway, Auth0-based auth, and Terraform-managed GCP infrastructure. Collaborate cross-functionally to redesign discovery, evaluation, onboarding, and time-to-value while ensuring reliability, testing, and stable deployments.

Develop and maintain a digital ordering platform for medical equipment. Lead technical decisions, deliver quality code, and ensure system reliability while collaborating in an agile environment.

Lead design and ownership of scalable data domains, build and maintain data pipelines (Airflow, Snowflake), drive platform engineering and cost-conscious cloud architecture on AWS, champion AI-assisted development, mentor engineers, ensure operational excellence, automate toil reduction, and guide cross-functional stakeholders.

Build and scale a greenfield digital lending platform with emphasis on front-end experience, cloud-native infrastructure, AI/ML integration, ServiceNow implementations, and mobile/web applications. Work across the full SDLC as a hands-on senior individual contributor, collaborate with product and design, perform code reviews, support QA and production, and integrate with partners and enterprise systems.

Senior contractor engineer will own and evolve Thrive's enterprise platform end-to-end, starting on the Coaching app. Responsibilities include sustaining engineering (reliability, scalability, technical debt), delivering medium-to-large projects, partnering with Product and stakeholders, supporting on-call and incident response during US hours, and shipping high-quality, enterprise-facing features iteratively.