Top Software Engineer Jobs in St. Louis, MO

Leads AWS-native application engineering initiatives across architecture, development, testing, deployment, and modernization. Sets technical direction, oversees multiple delivery workstreams, guides AI-enabled engineering practices, and develops scalable cloud solutions. Builds executive client relationships, shapes transformation roadmaps, supports business development, mentors engineering teams, and drives application performance, security, reliability, and cloud modernization across AWS and other major cloud platforms.

Develop and prototype sensor-fusion algorithms for tactical aircraft network operations using mathematical and statistical techniques. Analyze multimodal sensor data, apply Kalman filtering and probabilistic models, evaluate algorithm performance, document requirements and analyses, and transition successful prototypes into production software. Collaborate with software architects and customers on algorithm design and requirements. The role requires a bachelor’s degree, relevant sensor-fusion experience, U.S. citizenship, and ability to obtain a Secret clearance.

Lead enterprise engineering strategy and solutions across complex business and technical challenges. Advise leadership, shape long-term technology direction, resolve large-scale problems, translate strategic objectives into engineering solutions, and promote innovative technologies. Collaborate across distributed, cross-functional Agile teams while maintaining expertise in modern development practices, AI-assisted development, application technologies, databases, and operational excellence.

Develop and deploy enterprise applications using Python and C# across Oracle, SQL Server, and SQLite environments. Build CI/CD pipelines, Docker solutions, deployment scripts, automated tests, APIs, monitoring tools, and AI-powered automations. Provide production triage and print-facility support, document solution designs, participate in peer reviews, mentor engineers, and collaborate with operational and cross-functional teams.

Lead architectural modernization of enterprise .NET applications into cloud-native microservices. Define technical strategy, cloud architecture (AWS/GCP), DevSecOps/CI-CD, mentor engineers, drive API-first and front-end modernization, and align technology with business goals.

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.

Design, develop, test, and support secure healthcare integration services, APIs, distributed systems, and third-party integrations. The role involves cloud infrastructure, CI/CD, automated testing, observability, production troubleshooting, on-call support, and collaboration within an agile engineering team. Candidates should have software development experience, integration and distributed-systems expertise, and familiarity with healthcare technology and interoperability standards such as FHIR.

Principal Engineer responsible for defining the long-term architecture and modernization strategy for GitLab’s Fulfillment platform. The role drives technical direction across entitlements, licensing, provisioning, seat management, usage visibility, and cost management. Responsibilities include hands-on distributed systems engineering, migrations, performance and reliability improvements, cross-team influence, AI-assisted engineering adoption, and mentoring senior technical staff.

Lead the mobile engineering team in evolving iOS and Android applications toward an AI-native, thin-client architecture. Define participant API and platform direction, contribute Python to backend services, establish AI-assisted development processes, improve DevOps and continuous delivery, mentor engineers, and partner closely with Product and Design. The role requires principal-level technical leadership, product focus, system architecture expertise, and hands-on use of AI coding agents.

Develop Android system applications for Toast’s device management platform, focusing on background services, device policy enforcement, setup, firmware and app updates. Support new hardware and OS upgrades, expand automated testing with Robot Framework, investigate production issues, and collaborate with product, hardware, QA, and software teams. The role requires strong Android development skills in Java or Kotlin, Android architecture libraries, debugging tools, and source control.

Build and scale mission-critical tips, earnings, and payroll platforms for restaurant employees. Own systems end to end, lead complex projects from design through deployment, improve reliability and correctness, collaborate with product and design, review code, mentor engineers, and deliver scalable backend services that affect employee pay and product revenue.