Top Senior Software Engineer Jobs in St. Louis, MO

As a Senior Software Engineer, you'll work on backend systems, engage in engineering challenges, and contribute to software development and deployment.

The QA Engineer will design and maintain automated testing frameworks for web, mobile, and backend systems, perform data validation, and collaborate with teams to integrate tests into CI/CD pipelines.

The Senior Software Engineer will develop reliable systems for IoT fleet management, create user interfaces, and support data engineering tasks.

Lead the architecture of Commerce Hub by defining core domain models, building intricate systems, and mentoring engineers while influencing product strategy.

Lead company-wide transformation of test automation and quality engineering: define vision and roadmap, architect scalable testing frameworks across server/web/mobile/desktop, integrate AI/LLM for test generation and flakiness management, establish observability and quality gates, mentor engineers, and partner with leadership to embed quality across the SDLC.

As a Senior Software Engineer, you will build software for carbon dioxide removal efforts, focusing on full-stack development and optimizing complex workflows.

The role involves designing and developing full-stack features using Angular and Java/Spring Boot, building scalable services, and optimizing system performance. Responsibilities include API design, technical documentation, and collaboration with engineering teams.

As a Staff Data Engineer, you'll architect and build data pipelines, champion small data strategies, mentor teams, and ensure operational excellence in data workflows.

The Senior Software Engineer will develop full stack software using Typescript, MySQL, React, and Next.js, oversee features from conception to production, and collaborate across teams at Ethena.

The role involves integrating generative models into Intangible Studio, evolving job systems with TypeScript and Node, and maintaining high visual quality standards.

The Senior Software Engineer will lead the design and implementation of full-stack features, mentor peers, and contribute to architectural decisions focusing on enterprise-grade software solutions.

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

As a Senior Software Developer, you'll design and deliver software solutions that enhance patient access to medications, collaborating with cross-functional teams.

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

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 build backend systems, collaborate with customers, drive product features, and enhance AI automation at Acai Travel.

The Sr Software Development Engineer will design and maintain scalable cloud-based solutions, lead project technical direction, and ensure high-quality deliverables in a fast-paced Agile environment.

As a Software Engineer, AI/ML GenAI, you will design and implement AI features, manage embeddings, and optimize AI systems for production deployment while collaborating with product and design teams.

The Senior Software Engineer will design, develop, and operate critical software services, improving reliability and performance while collaborating with PMs and Designers to deliver customer-focused solutions.

Build and improve application and developer infrastructure for a FedRAMP-high US environment: support US-specific hosting/on-call, enhance auth/RBAC, feature-flag tooling, CI/CD, monitoring, and developer experience while collaborating across engineering teams.

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

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.

The Senior Software Engineer will design and develop APIs and microservices for shared services using .NET and SQL, and collaborate with teams to enhance integration and architecture, while following Agile practices and ensuring code quality.

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.