Top Software Engineer Jobs in St. Louis, MO

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

The role involves designing and implementing SaaS solutions, leading development teams, ensuring high software engineering standards, and maintaining system performance.

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.

Design, build, and operate backend platform services and infrastructure, owning features end-to-end from design through production. Improve reliability, performance, and scalability across services and the data layer, investigate and resolve production incidents, and convert fixes into durable improvements. Perform database work as needed (query/index tuning, sharding, capacity planning) and collaborate with SRE and application teams to meet zero-downtime SLAs. Mentor peers and raise engineering quality through reviews and best practices.

The Senior Software Engineer designs and develops complex features within OneStream solutions, ensuring technical excellence and mentoring other engineers. Responsibilities include architectural design, UI development, API creation, performance improvements, and collaboration across teams.

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.

The role involves developing high-scale APIs, decision platforms, and machine learning solutions within the Risk Engineering team, focusing on mitigating risks related to credit, fraud, and product launches while collaborating across teams.

The Senior Software Engineer will develop risk management platforms and APIs, focusing on mitigation of credit and fraud risks while collaborating closely with product and engineering teams.

As a Staff Software Engineer, you will design and maintain financial services, develop APIs, improve operations, and mentor engineers within a fintech startup.

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.

The Software Sr Engineer will develop Android applications, ensuring high test coverage and clean code principles, while leading code reviews and collaborating with a technical team.

The Principal Software Engineer will lead technical initiatives, align cross-functional teams, establish standards, and guide multiple engineering teams towards strategic objectives, driving large-scale improvements in business outcomes.

Lead the development team to enhance administrative tools, manage full stack web experiences, resolve performance issues, and mentor other developers.

The Senior Software Engineer will develop software and implement solutions, mentor engineers, and improve engineering processes at a remote startup.

The Staff Software Engineer will develop software solutions, mentor non-staff engineers, and enhance engineering processes while delivering high-quality products.

Responsible for designing, developing, testing, and supporting software products. Involves leading sprints, managing databases, and ensuring code quality.

The Staff Software Engineer will build web APIs and data pipelines for energy analytics, contribute to electricity cost modeling, and improve engineering processes while collaborating across teams.

The Staff Software Engineer will lead feature delivery by building frontend and backend components, focusing on architecture, optimization, security, and performance in a fast-paced environment.

Lead design and implementation of a headless Optimizely DXP front-end using Next.js on Vercel for 150+ marketing sites. Define content models and architectural standards, implement personalization and A/B testing, optimize performance and accessibility, manage CI/CD and repository ecosystems, and mentor engineering peers to enable repeatable, scalable site launches.

As a Senior Software Engineer at MNTN, you'll design and operate backend systems for ad delivery, ensuring high performance and reliability. You'll work with Java, Kotlin, and Scala to handle high-throughput services and contribute to architectural decisions while improving system efficiency.

The Senior Software Engineer will lead technical initiatives, design scalable systems using Node.js and AWS, mentor engineers, and improve platform reliability.

As a Senior Backend Engineer, you will enhance the Integrations platform for managing large data streams, collaborating with teams, and optimizing connectors.

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.

As a Senior Software Engineer, you will develop and maintain Alpaca's platform services, including event streaming infrastructure and authentication systems, while ensuring software quality and reliability.

As a Senior Software Engineer, you'll design and build scalable market data systems, improve API architecture, and enhance overall system performance, contributing to Alpaca's infrastructure for trading financial assets.