Top Software Engineer Jobs in St. Louis, MO

Design, develop, test, and deploy scalable cloud-native microservices in Azure using C#/.NET Core. Implement CI/CD, diagnose and fix defects, conduct code reviews, document APIs, mentor peers, and collaborate with architects and DevOps to deliver secure, maintainable platform services.

Lead technical vision and architecture for a full-stack healthcare platform. Build scalable backend services, APIs, frontend apps (React/Next.js), cloud-native systems, microservices, and AI/LLM integrations. Lead cross-functional initiatives, mentor engineers, establish best practices for CI/CD, observability, security, and performance, and collaborate with Product, Design, and Data teams to deliver reliable, HIPAA-aware solutions.

Lead design and delivery of platform capabilities that power a Federated GraphQL API and event-driven systems. Build and optimize gRPC endpoints, GraphQL APIs, and SQL for scale; own observability (DataDog, Bugsnag), mentor engineers, drive integrations, improve performance and reliability, and support customer-facing product teams across the organization.

Lead architecture and delivery of large-scale, cloud-native distributed systems. Own service lifecycle in Kubernetes, drive scalability and reliability, mentor engineers, participate in on-call, and coordinate cross-functional initiatives.

Design, develop, test, and maintain scalable front-end and back-end services and APIs. Lead technical design, perform code reviews, troubleshoot production issues, document systems, implement automated tests, and collaborate with cross-functional teams to deliver reliable shipping infrastructure.

Build, ship, and maintain cloud-native and air-gapped delivery tooling (UDS/Zarf) across mission-critical environments. Contribute to system design, production support (on-call), security and interoperability, open-source contributions, and technical documentation. Mid-levels own scoped features; seniors lead architecture, cross-team initiatives, and mentor others.

Seeking a Senior Software Engineer with 5+ years of experience to design and develop large-scale distributed systems, mentor junior engineers, and manage complex projects in a dynamic setting.

Lead backend architecture and system design for an AI-driven manufacturing planning platform. Build and scale a Node.js/Python stack with Azure Databricks, implement optimization and scheduling algorithms, establish engineering patterns, and mentor/lead a small early-stage engineering team while collaborating with product and data functions.

The Senior Software Engineer will develop and optimize systems for aerospace communications, manage project priorities, and contribute to various technical initiatives.

The Senior Software Engineer will develop and optimize systems for Aalyria's Spacetime platform, focusing on API development and wireless network algorithms.

As a Unity Engineer, you'll implement features, ensure performance optimization, debug issues, and collaborate with the team to enhance gameplay for mobile titles.

As a Senior Software Engineer, you will develop key product features for millions of users, collaborate with teams, and mentor others.

The Senior Software Engineer will own the React Native mobile codebase, collaborate with cross-functional teams, and ensure high-quality delivery of customer-facing applications.

The Senior Software Engineer will collaborate on projects, optimize existing functionality, and ship cloud functions using Kotlin, focusing on enhancing product experience.

Build and maintain federated identity and authorization platform services for a multi-tenant SaaS environment. Implement integrations (OAuth/OIDC/SAML/JWT), design observable, fault-tolerant backend services in .NET or Python, use AI-assisted development tools, write tests and observability, participate in on-call and mentoring, and produce documentation and tooling to enable product team integrations.

The Software Engineer will design and implement reliable services and APIs using Golang and Python, ensuring performance, scalability, and system reliability while collaborating with cross-functional teams.

Contractor role to design and build realistic 3D scenes and simulations in Open 3D Engine (O3DE) for AI training. Develop asset pipelines, write Python and C++ code, use Atom Renderer and O3DE systems, collaborate with stakeholders, and document technical solutions. Remote position requiring game or simulation engineering experience and AWS knowledge.

Seeking a Staff Software Engineer to design and build cloud-deployed systems. Must have extensive programming and leadership experience in software engineering.

Lead design, build, and scale backend and frontend components for Pearl's clinical product suite. Own engineering architecture and deployments, integrate systems with ML/computer vision pipelines, use AI-assisted development tools to accelerate delivery, improve engineering velocity and quality, and mentor teammates in AI-augmented workflows.

The Principal Software Engineer will lead the design and build-out of an AI Context Layer, ensuring high-quality data for AI systems, while managing access control and developer interfaces, and leading cross-team projects.

The Senior Software Engineer will design and develop backend systems using Go and PostgreSQL, focusing on performance, architecture, and backend microservices for the Flock Safety platform.

The Senior Software Engineer at Payabli will design and manage cloud infrastructure, CI/CD pipelines, local development environments, and ensure security and compliance while enhancing the developer experience.

The role involves designing and developing a universal search platform, integrating data, leading system architecture, and mentoring junior engineers.

Develop and maintain scalable software solutions, mentor developers, and integrate AI tools. Collaborate on technical solutions aligned with business goals.

The Senior Software Engineer will develop and maintain full stack applications at Polly, utilizing various technologies for web and mobile platforms, mentor teammates, and collaborate with product teams.