Top Software Engineer Jobs in St. Louis, MO

Designs, develops, and integrates ServiceNow solutions focused on CMDB, ITSM, ITOM, and SPM. Builds scripts, workflows, integrations, and service topology capabilities using external data sources. Troubleshoots complex integration issues, collaborates with stakeholders to define requirements, leads technical design, mentors developers, and supports documentation and data management planning for a DoD customer.

Build and maintain full-stack web applications, APIs, services, and internal tools supporting driver experiences, geospatial capabilities, cross-dock operations, and logistics platforms. Develop primarily with React, TypeScript, Go, and Ruby on Rails while contributing to scalable architecture, testing, reliability, performance, code reviews, and cross-functional delivery with Engineering, Product, and Operations teams.

Analyze and troubleshoot mainframe JCL batch workloads, schedules, CICS environments, and related configurations. Convert legacy batch jobs into PowerShell scripts for Azure, automate recurring cloud batch processing, optimize concurrency and performance, and maintain secure PowerShell modules. Document business requirements, collaborate with stakeholders and cross-functional technical teams, and support mainframe-to-cloud migration projects using Agile practices.

Build and operate an AI-native software development lifecycle across planning, coding, review, testing, deployment, and incident response. Develop internal AI agents, shared harnesses, CI/CD gates, automated QA, code reviewers, and developer workflows. Embed with engineering teams, ship on their backlogs, drive adoption, remove infrastructure and tooling blockers, and measure improvements in throughput, quality, cycle time, cost, and developer experience.

Develop and maintain scalable client-side and server-side applications using JavaScript and Python. Work across the software development lifecycle, including architecture, deployment, testing, and maintenance. Improve reliability, performance, code quality, and operational practices through code reviews, mentoring, observability, and monitoring. Build AI/ML infrastructure supporting LLMs and RAG systems, contribute to open-source projects, and develop secure, production-ready platforms and developer tools.

Build and own the technical roadmap: design AI-first interfaces and APIs, architect scalable ETL pipelines, develop data models for ML features, ship autonomous B2B workflows (PO generation, vendor sync, schedule optimizations), and establish engineering standards, CI/CD, and mentoring.

Design, develop, and modernize scalable front-end UI applications using Angular and TypeScript. Lead large UI projects, enforce coding standards, write technical specifications, optimize performance, mentor engineers, collaborate full-stack, and support CI/CD and Agile practices to deliver user-centric features.

Design and deliver enterprise-grade Java-based solutions and architectures. Produce HLD/LLD, guide development teams, define APIs/integration, enforce security and performance best practices, and collaborate with stakeholders and DevOps on CI/CD and deployments.

Build and operate large-scale distributed web crawlers that discover, fetch, extract, deduplicate, and recrawl billions of pages. Develop targeted pipelines for audio, video, and multilingual data, transforming web content into training-ready datasets. Create infrastructure and tooling for researchers to request, monitor, evaluate, and explore crawled data, while ensuring reliability, efficiency, compliance, politeness, and rate-limit handling.

Develop and maintain scalable Java backend systems using Spring Boot and microservices architecture. Collaborate with customer teams, review specifications, write clean code, participate in code reviews, document solutions, and troubleshoot and optimize backend performance, reliability, and security. The role also contributes technical expertise to training next-generation AI systems, though prior AI experience is not required.