Top Software Engineer Jobs in St. Louis, MO

The role involves leading initiatives for vector search in Elasticsearch, enhancing features, resolving bugs, and contributing to community engagements in a distributed team setting. A strong background in vector similarity and Java is crucial.

Lead technical direction and hands-on execution for major software products and systems. Design scalable architectures across backend, frontend, APIs, databases, and infrastructure; write code; drive architecture decisions; solve production issues; improve testing, security, observability, and development practices; lead critical initiatives; and mentor engineers across distributed international teams.

Owns technical direction and hands-on execution for major products and systems. Designs scalable backend, frontend, API, database, and infrastructure solutions; writes code; leads architecture decisions; resolves production issues; improves engineering quality; drives critical initiatives; and mentors engineers across teams.

Owns technical direction and hands-on execution for major products and systems. Designs scalable backend, frontend, API, database, and infrastructure solutions; writes code; drives architecture decisions; leads critical initiatives from design through production; improves engineering quality through testing, security, observability, and development practices; and mentors engineers across teams.

Lead backend technical strategy and hands-on implementation to migrate on-prem systems to Azure, decompose a .NET monolith into service-based architecture, define data models and API contracts, ship customer-facing features with CI/CD and observability, and mentor engineers across the cross-functional Platform team.

Lead design, build, and operate scalable backend services and carrier integrations. Provide technical leadership, mentor engineers, drive architecture and best practices, write and test code, troubleshoot production incidents, and improve monitoring and reliability while collaborating with product and cross-functional teams.

As a Staff Software Engineer in Infrastructure, you will lead a team in building high-performance, distributed systems, guide project direction, mentor engineers, and improve data ingestion architecture.

Own and evolve ZoomInfo’s CI/CD delivery tooling, GitOps deployment API and CLI, shared TypeScript monorepo, ingress layer, and Go automation platform. Lead technical strategy, architecture, migrations, golden paths, and multi-quarter roadmaps while remaining hands-on in Go and TypeScript. Apply agentic AI, MCP, A2A, and durable workflows to infrastructure automation. Mentor engineers, drive quality through design and code reviews, and align CI/CD, DevOps, and platform teams.

Design, build, and operate secure, scalable cloud infrastructure and platform capabilities. Implement IaC, improve CI/CD, observability, and automation. Lead incident response, reliability, and DevSecOps practices. Mentor engineers, drive platform standardization, document runbooks, and participate in a 24/7 on-call rotation to support production systems and remediation of systemic infrastructure issues.

Seeking a Senior Software Engineer experienced in C++ and embedded systems for defense projects, requiring on-site presence and U.S. citizenship.

Lead development of search relevance and vector search features in Elasticsearch. Design and implement new algorithms and data structures, fix complex bugs, collaborate with a distributed team and the open-source community, and write idiomatic modern Java while improving search performance and relevance.

Design and implement PostgreSQL internals, indexing, query engine extensions, and storage-layer features to support large-scale document workloads on Azure. Profile distributed systems, tune performance, collaborate with open-source communities, conduct design/code reviews, and drive cross-team alignment for mission-critical database features.

Design and build Go-based control-plane services, CSI drivers, and tooling for high-performance storage integrated with Kubernetes AI and compute workloads. Develop declarative Terraform/OpenTofu and GitOps automation, telemetry, and observability systems. Support bare-metal, hybrid, air-gapped, and sovereign deployments using Kubernetes, Cluster API, Harbor, and PKI/TLS. Integrate enterprise and scale-out storage platforms while addressing throughput, latency, reliability, consistency, and scaling.

Design, develop, modify, test, and maintain full-stack software applications. Engineers will understand product areas, codebases, and systems; write high-quality, tested code; analyze data; solve complex problems; collaborate with product and engineering teams; conduct design and code reviews; and mentor junior developers while delivering customer-focused products.

Build and maintain a Java and Drools business rules engine governing eligibility, suppression, frequency capping, and consent. Develop Spring services, REST APIs, and Kafka integrations while ensuring deterministic behavior, exactly-once side effects, performance, testing, and compliance in a PHI-handling environment. Collaborate with Product and compliance teams, participate in code reviews, and support cloud-native deployments using Kubernetes and CI/CD.

Own and evolve Voltus’s infrastructure platform, including Kubernetes and Nomad workloads, AWS architecture, identity and secrets, stateful systems, observability, infrastructure as code, CI/CD, and developer tooling. Lead business-critical migrations with minimal downtime, establish reliable deployment and rollback practices, mentor engineers, participate in on-call, and build secure infrastructure supporting AI-assisted development.

Build and scale full-stack platform services for user onboarding, identity management, privacy controls, and secure public-safety workflows. Develop React applications, Node.js APIs, database models, and complex SQL queries. Containerize applications with Docker, deploy Kubernetes microservices using Helm, and leverage AWS services including S3, API Gateway, and SQS. Solve authentication, authorization, performance, and data-security challenges while shaping foundational platform architecture.

Architects, implements, and optimizes cloud infrastructure and automated systems. Maintains scalable, secure, reliable cloud environments; monitors system health, proactively resolves incidents, and minimizes downtime. Mentors junior engineers, advances CloudOps and DevOps practices, and collaborates with cross-functional teams to support mission-critical applications. Requires advanced Kubernetes, AWS, infrastructure-as-code, containerization, scripting, networking, and cloud security expertise.

Architect, implement, optimize, and maintain secure, scalable AWS cloud infrastructure. Lead CloudOps and DevOps improvements, mentor junior engineers, deploy automated systems, monitor cloud environments, and proactively resolve production issues. The role requires advanced Kubernetes, AWS networking, infrastructure as code, Docker, scripting, cloud security, and healthcare compliance expertise.

Lead full-stack growth engineering across eligibility, identity, access, client configuration, and reporting systems. Build Python-based GraphQL and REST APIs, React and React Native experiences, scalable database systems, and secure HIPAA- and GDPR-compliant solutions. Own ambiguous cross-domain technical projects, write RFCs, coordinate roadmap delivery, mentor engineers, contribute to engineering strategy, and participate in on-call operations and remediation.

Design, develop, deploy, and support complex OneStream software features and services. Own end-to-end delivery, APIs, SDKs, data contracts, performance, scalability, reliability, and production quality. Lead technical design discussions and code reviews, mentor engineers, improve CI/CD and testing practices, and collaborate cross-functionally. Build user interfaces with modern frameworks, resolve production issues, and responsibly use AI-assisted development tools while ensuring correctness, security, and architectural alignment.

Evaluate AI coding-agent interactions for usefulness, correctness, engineering judgment, explanation quality, and user trust. Provide rigorous, opinionated feedback distinguishing response quality levels and help define best practices for tools such as OpenAI Codex, Claude Code, and Cursor. This contract role requires experienced software engineering judgment rather than production coding.

Build and operate accessible, high-performance member-facing web applications using a front-end-first full-stack approach. Contribute to APIs, backend services, data flows, integrations, frontend architecture, testing, observability, and performance improvements. Own projects from concept through production, collaborate with Product, Design, Data, and Clinical teams, improve developer experience, support AI-assisted coding practices, participate in technical reviews and incident follow-up, and mentor engineers.

Build and deploy backend services, internal web applications, and tooling for item creation, enrichment, listing, configuration, and merchandising. Own features end to end, influence architecture, review code, improve reliability and observability, and collaborate with product, design, engineering, and business stakeholders. The role involves JVM and web technologies, event-driven systems, databases, GraphQL, production operations, and complex marketplace data.

Lead design and implementation of iOS applications, mentor engineers, coordinate with vendors and operations, ensure delivery within scope/time/budget, and apply modern iOS practices (testing, CI/CD, analytics, async concurrency) to maintain high-quality production apps.