Top Software Engineer Jobs in St. Louis, MO

As a Backend Engineer, you will design and implement core infrastructure for Vannevar's platform, ensuring standards for data processing, security compliance, and performance. You will collaborate with various teams to enhance shared infrastructure and lead technical initiatives.

The Lead Software Engineer will design, develop, and maintain embedded software for defense systems, ensuring compliance with standards and coordinating project management functions.

Lead engineering team to design, analyze, test, and certify aircraft software per FAA standards (DO-178B/C). Act as FAA liaison, oversee technical documentation for certification, mentor staff, resolve complex engineering issues, and ensure on-time delivery of safety-critical certification milestones.

Lead design, build, and deploy scalable cloud platforms and AI/ML solutions (including GenAI/LLMs) for healthcare. Collaborate with cross-functional teams, enforce coding standards, perform code reviews, optimize performance, and ensure secure, compliant deployments using serverless, microservices, and containerization.

Lead a team to design and maintain secure software development environments, implementing DevSecOps practices and mentoring early-career employees.

Develop and maintain backend-to-UI applications, apply modern practices (microservices, serverless, CI/CD), write and document code, participate in estimations, troubleshoot performance and production issues, and collaborate in agile teams.

The Software Engineer/Senior Software Engineer will design, develop, and maintain high-quality software and automated test systems, engaging in technical discussions and ensuring application performance and reliability.

As a Software Developer, you'll design, develop, test, and deploy software solutions in an Agile environment, focusing on geospatial applications and infrastructure problems.

Lead projects in SCADA, MES, and information solutions, interfacing with clients, managing project scope, and overseeing execution and startup activities across industries, primarily food and beverage and life sciences.

Design, build, and operate scalable Salesforce CRM and billing solutions (Apex, LWC, Flows). Deliver end-to-end features, integrate Salesforce with external systems, ensure reliability and security, support production (on-call), document runbooks, and mentor junior engineers while partnering with cross-functional stakeholders.

Lead system-level integration, verification, and validation of software/hardware mission systems using DevSecOps, CI/CD, containerized deployments, and cloud-native test environments. Develop and maintain requirements and traceability, define test strategies and acceptance criteria, analyze results, drive corrective actions, and mentor junior engineers. Ensure interoperability, performance, and mission assurance in secure DoD environments.

Lead and coordinate OFP software teams and integration activities while owning Cost Account Management. Oversee budgets, EVM metrics (CPI, SPI, ETC, EAC), forecasts, and variance corrective actions. Collaborate with systems engineering, test, QA, and supply chain to deliver embedded/flight software on schedule and within scope, and mentor junior engineers.

Develop and enhance infrastructure using Rust and C++, ensuring high-performance applications with a focus on memory safety and concurrency.

As a Software Engineer for the ARC team, you'll design and implement secure backend systems, manage model inference layers, improve engineering standards, and collaborate with teams to meet government agency needs.

As a Software Engineer in Frontier AI Infrastructure, you'll design secure systems for the public sector, improve engineering standards, and collaborate with cross-functional teams to meet government requirements. You'll also participate in customer engagements and contribute to the product strategy while ensuring compliance with federal regulations.

The Software Engineer will develop cloud-native solutions, manage teams, ensure compliance with software development guidelines, and lead project documentation.

The Software Engineer will analyze, design, code, test, and modify software products, focusing on Unifier and OPPM platforms, and collaborate on integration solutions in an agile environment.

As a Principal Software Engineer, you will design, develop, and implement complex software solutions, lead projects, and ensure compliance with standards in a cloud-first environment.

The Senior Full-Stack Software Engineer will design, build, and scale SaaS products, improve application performance, and lead technical initiatives. Responsibilities include modernizing web applications, contributing to backend services, and mentoring other engineers.

The role involves leading projects as a full-stack engineer, focusing on SaaS products, enhancing user experiences, and building accessible software.

The Full-Stack Software Engineer will enhance user interfaces, APIs, and develop features for AI applications while collaborating with teams and ensuring code quality.

The Senior Software Engineer in DevX CI builds, improves, and operates backend productivity infrastructure, designs scalable solutions, and supports internal engineers.

The role involves designing and operating foundational data services, building data integration SDKs, and ensuring data security and observability. The engineer will also convert functional requests into scalable data solutions across the organization.

As a Senior Software Engineer, you will design and build a cutting-edge identity search platform and implement AI systems for defense applications, working closely with cross-functional teams to enhance user workflows and support national security.

As a Senior Software Engineer, you will enhance Upstart's Partner Experience by developing scalable APIs and tools, collaborating with various teams to optimize business workflows, and ensuring platform security and performance.