Top Software Engineer Jobs in St. Louis, MO

As a Billing & Analytics Software Engineer, you'll design and maintain the billing pipeline, integrate billing systems, and develop customer-facing analytics dashboards to support revenue recognition and operational observability.

As a backend engineer, you will enhance data collection systems to ensure reliability and scalability, working closely with engineering and mission teams.

Lead full‑stack design and delivery of customer-facing web experiences (Browse, Navigate, Preview). Own architecture, APIs, data models, rollouts, observability, on‑call readiness, and cross-team alignment, using approved AI-assisted workflows while ensuring technical quality and reliability.

Lead a team of software engineers supporting critical retail-banking applications. Design and develop software solutions, provide technical guidance, review code and documentation, troubleshoot complex incidents, and apply SRE practices. Maintain on-call rotation for after-hours critical incidents. Use OpenShift, Hogan, Dynatrace, and Linux; collaborate on releases and modernize application delivery.

Lead design and delivery of scalable customer-facing features, services, and APIs that process real-time data and AI-powered insights. Build web experiences, contribute to LLM/AI workflows, ensure reliability through observability and rollout practices, and collaborate cross-functionally with Product, Design, ML, and platform teams.

Lead development and maintenance of high-performance React Native apps across iOS and Android. Improve architecture, manage RN upgrades, debug native modules, own automated testing and CI/CD, optimize performance and stability, and mentor engineers within cross-functional product pods.

Design and implement secure, scalable backend services for voice agents, integrate AI models and telephony, improve inference, debug concurrent systems, and collaborate with Product to deliver features end-to-end.

Build and scale consumer-facing mobile and web applications and backend services. Own features end-to-end across frontend and backend, optimize databases and queries, integrate third-party APIs, implement algorithms for risk and transaction evaluation, improve reliability and CI/CD, and contribute to testing, monitoring, and internal tools to support customer operations.

Develop and integrate C# and web-based software for the MQ-28 program as part of a SAFe Agile team. Investigate and resolve software defects, maintain work items in Azure DevOps, and collaborate within a self-organizing development team.

Design, build, and operate core developer-infrastructure services (CI, builds, deployment orchestration, test infra). Own components end-to-end, improve build/CI/deploy/test metrics, participate in on-call rotation, write observable production-ready code, collaborate with engineering teams, and contribute to technical design and knowledge sharing.

Design, develop, test, and maintain non-embedded .NET software for the Tomahawk program. Translate requirements into designs, implement features, troubleshoot issues, and document R&D. Support systems integration, adhere to government regulations, and respond to user inquiries and technical issues.

Design, develop, test, and maintain non-embedded software for the Tomahawk program. Translate requirements into software designs, implement features, troubleshoot issues, and document R&D. Ensure compliance with government and safety standards and support system integrations.

The role involves leading application performance improvements across multiple platforms, focusing on measurable metrics and driving engineering standards and workflow optimization, using both hands-on coding and strategic influence.

As a Software Engineer, you'll develop software using Ruby, Javascript, and support AWS infrastructure. Responsibilities include maintaining and building applications, contributing to high-end software releases, and mentoring other engineers.

Lead UI architecture and design for responsive web applications; build reusable components with Angular/React/Vue and TypeScript/JavaScript; integrate UIs with RESTful microservices; enforce accessibility, security, testing, and CI/CD standards; mentor developers and collaborate with UX, backend, and DevOps teams in Agile environments.

The Backend Software Engineer will develop data ingestion pipelines, implement observability tools, and provide technical support while improving team collaboration.

Develop a platform for liquidity and loan collateralization. Responsibilities include building and integrating data pipelines, creating user experiences, and collaborating with teams for system design.

Lead Software Engineer responsible for software design and development for defense-related projects, mentoring junior engineers, and ensuring project alignment with requirements and standards.

As a Mission Software Engineer, you'll develop solutions for government customers by integrating software into existing workflows, requiring significant travel, collaboration, and technical expertise.

Design, develop, and execute automated frontend and backend tests for .NET applications; create automation plans; perform manual exploratory testing; document defects and validate fixes; collaborate with product and development teams; track automation metrics and maintain test suites and CI/CD integration.

The software engineer will build full-stack features for Kora's voice AI agent, integrating data, refining prompts, and expanding multi-modal capabilities while mentoring peers and ensuring technical quality.

Design and implement CIAM backend services for authentication and authorization. Integrate identity systems, manage secure flows, and automate infrastructure.

Work on user-facing features built on the MongoDB query engine, implement and test C++ code, improve query performance and robustness, integrate query with other products, and participate in code reviews and design. Deliver new features, fix bugs, and mentor peers over time.

As a Software Engineer, you'll design, build, and maintain IAM solutions, ensuring security and reliability while working with cloud computing standards.

Lead architecture, provisioning, and optimization of on-premises and cloud lab/test environments. Drive CI/CD and deployment pipelines, integration testing workflows, observability, security/compliance (CIS, NIST, SOC 2, FedRAMP), and mentor engineers. Act as technical liaison across programs and external partners to ensure scalable, secure, repeatable lab operations and data-driven insights.