Top Software Engineer Jobs in St. Louis, MO

Design, develop, test, troubleshoot, document, and deploy enterprise MuleSoft integrations, APIs, and connectors using Anypoint Platform and CloudHub. Optimize scalability, reliability, and performance; collaborate on integration testing and code reviews; integrate ERP, CRM, database, cloud, and third-party systems; and provide technical guidance to junior developers.

Design and scale backend services, data pipelines, event-driven systems, and integrations supporting autonomous manufacturing operations. Build LLM agents and RAG workflows for supplier document analysis, manage PostgreSQL data models, integrate ERP and freight APIs, implement caching and rate limiting, and establish observability and incident response practices. The role requires transactional processing expertise, NLP/ML pipeline experience, and manufacturing supply chain domain knowledge.

Develops and delivers resilient full-stack applications and services for Vantage’s reinsurance business. Responsibilities include application design, coding, debugging, testing, architecture discussions, risk management, roadmap estimation, stakeholder consultation, and coordination across project teams. The role promotes software engineering standards, DevSecOps, CI/CD, agile practices, innovation, and mentoring while building solutions with JavaScript, React, Node.js, Python, cloud, serverless, and modern infrastructure technologies.

Build and ship full-stack features used by learners and tutors worldwide. Responsibilities include understanding user problems, contributing product ideas, taking prototypes through deployment, making technical decisions, writing maintainable code, and participating in code reviews and pairing sessions. The role requires close collaboration with designers, stakeholders, and users while supporting a safe, scalable peer-learning platform.

Develops maritime route optimization, vessel performance modeling, voyage analysis, simulation, and evaluation software for government and defense customers. The role improves optimization algorithms, models fuel consumption and operational constraints, builds explainable route recommendations, and collaborates with engineers and maritime specialists. Work spans Rust, Python, APIs, testing, algorithms, and production software supporting U.S. Government maritime applications.

Develop and enhance full-stack digital products across frontend and backend systems. Responsibilities include designing, coding, testing, troubleshooting, maintaining applications, contributing to CI/CD and cloud-native practices, and collaborating through Agile ceremonies, paired programming, and knowledge sharing. Senior and Lead engineers additionally mentor teams, influence technical strategy, guide system design, and drive cross-product engineering direction.

Provides technical leadership for the 340BCheck healthcare data platform. Designs architecture across front-end, back-end, data, infrastructure, and CI/CD; resolves complex distributed-systems problems; drives refactoring, observability, and cross-team initiatives; mentors senior engineers; communicates technical tradeoffs; and influences long-term engineering direction without direct people management.

Design, build, operate, and maintain Grafana’s distributed search and storage systems. Deliver features from ideation through production, ensure reliability and performance, participate in on-call rotations, contribute to open-source projects, and collaborate remotely across teams. The role also involves mentoring colleagues, participating in technical design discussions, understanding customer needs, and continuously improving cloud-based services and engineering practices.

Develop and maintain backend and frontend services for a SaaS cyber-physical systems platform using Python, Go, React, and cloud-native technologies. Investigate production incidents, replicate customer issues in staging, perform root cause analysis, and deliver feature enhancements. Ensure compliance with FedRAMP, CMMC, and GovCloud requirements while collaborating with distributed engineering teams across the US and Israel.

Develop and maintain the 1035YellowPages platform using legacy and modern Microsoft technologies. Responsibilities include full-stack development, database work, web services, defect resolution, performance troubleshooting, client integrations, onboarding, and support escalations. The engineer will own the AI development roadmap, use AI-assisted tools, mentor junior staff, document system knowledge, and independently ship production enhancements in a fully remote, high-autonomy environment.

Build and scale Bubble’s backend infrastructure and platform services, improving performance, reliability, observability, capacity management, and data scalability. Contribute to workflow engines, data-tier systems, cloud infrastructure tools, and high-volume services. Participate in triage and on-call processes, diagnose incidents, and implement preventative improvements while collaborating effectively with engineering teammates.

Develop secure native iOS applications for identity and access management products. Build intuitive interfaces using SwiftUI, UIKit, and Storyboards; apply scalable architecture and concurrency patterns; and collaborate with engineers and security experts. Responsibilities include implementing mobile security features, secure networking, cryptography, release pipelines, performance optimization, and app hardening while taking ownership of complex technical challenges.

Lead the development of Runware's serverless platform by building core systems for AI workload management and providing technical guidance to the team.

Lead development of Runware’s AI platform, including scalable backend APIs, SDKs, developer tools, and inference orchestration systems. Design high-performance distributed architectures, optimize image and video model integrations, improve reliability and observability, shape technical direction, and mentor engineers. Collaborate across platform, infrastructure, and product teams to deliver robust developer experiences and maintainable systems.

Designs and ships full-stack features across Angular, PHP/Symfony, Go, and MySQL. Responsibilities include architecture, data modeling, API design, testing, code reviews, technical design leadership, mentoring engineers, AI-assisted development, production support, incident investigation, and systemic improvements. The role is fully remote in the US and collaborates with global engineering teams.

Principal Software Engineer responsible for cross-cutting architecture, technical roadmap direction, and delivery quality. The role involves developing APIs, databases, UIs, and libraries with C# or JavaScript/TypeScript; guiding AI-assisted development; establishing testing and verification practices; mentoring engineers; improving tooling and workflows; collaborating cross-functionally; estimating work; and participating in on-call support. The position is fully remote with occasional travel.

Designs and implements manual and automated tests across unit, component, integration, and end-to-end levels. Builds scalable UI and API automation frameworks, conducts performance and load testing, creates test reports, investigates regressions, and provides testability feedback. Collaborates with engineering, product management, and UX teams in an agile environment. The role requires Python and JavaScript automation expertise, cloud and container experience, CI/CD familiarity, SQL, and knowledge of microservices.

Designs and delivers scalable, resilient, cloud-native infrastructure services for Azure Virtual Machine Scale Sets. Responsibilities include gathering requirements, creating design documents, writing maintainable code, estimating work, monitoring services, responding to incidents, and improving availability, reliability, observability, efficiency, and performance at hyperscale.

Build and operate large-scale data acquisition systems, including web crawlers, distributed processing platforms, backend services, data pipelines, and asynchronous workloads. Improve ingestion reliability, scalability, observability, fault tolerance, and data quality. Collaborate with data product and engineering teams to develop data products, design schemas and pipelines, and deliver resilient systems in a remote-first environment.

Develop and execute comprehensive tests for GIS applications, ArcGIS tools, geospatial workflows, automated validation processes, and web mapping applications. Validate spatial data, geodatabase attributes, Real Property records, business rules, reports, dashboards, and integrations using SQL and scripting. Document defects, investigate root causes, verify fixes, and collaborate with GIS specialists, developers, and analysts. The role requires Esri GIS, Army Real Property and IGI&S knowledge, automated testing experience, and CAC eligibility.

Lead end-to-end technical ownership for an e-commerce platform service area. Design, build, and ship production features; modernize legacy systems; establish architecture and engineering standards; optimize platform performance; plan roadmaps and sprint priorities; mentor engineers; improve developer productivity; and contribute to hiring. The role requires hands-on TypeScript, JavaScript, React, Node.js, AWS, Python, and Django experience in a remote United States or Canada environment.

Provides technical leadership for brokerage and RIA technology platforms, defining architecture, standards, roadmaps, and reusable AWS serverless data-integration capabilities. Leads complex cross-team initiatives, architecture reviews, technical risk resolution, and solution delivery while remaining hands-on. Partners with business, product, cybersecurity, and engineering leaders, mentors senior engineers, evaluates emerging technologies, and promotes scalable, secure, observable, and reliable engineering practices.

Design, build, test, and operate production-grade, secure, and scalable software and services. Partner with customers to translate requirements into technical designs, drive engineering best practices (CI/CD, testing, observability), deliver end-to-end solutions, lead technical workstreams, and apply AI/LLM approaches where appropriate to produce production-ready outcomes.

Build and maintain scalable, cloud-native APIs and core marketplace systems. Lead software architecture and testing discussions, collaborate across teams, and improve application reliability, performance, telemetry, and operational health. The role uses .NET Core and related technology stacks, front-end JavaScript frameworks, Kubernetes, AWS, PostgreSQL, OpenTelemetry, and AI development tools.

Build and operate MoonPay’s developer platform, including APIs, SDKs, embedded components, reference applications, and integration tooling. Design secure browser and mobile experiences, simplify payment and crypto workflows, and ensure reliable distributed transaction processing. Own developer interfaces, documentation, versioning, observability, and migration strategies while supporting authentication, identity, KYC, payment methods, and purchasing capabilities across web, iOS, and Android.