Top Software Engineer Jobs in St. Louis, MO

Leads the design, development, deployment, and support of scalable, fault-tolerant software applications. Responsibilities include architecture, coding, debugging, performance optimization, cloud-native and microservices development, Kubernetes operations, production monitoring, incident response, code reviews, technical planning, mentoring, and cross-functional collaboration. The role also contributes to product roadmaps, engineering standards, automation, and on-call support.

Design and build scalable backend services and APIs for a real estate software platform. Develop clean, maintainable Java code on AWS, collaborate with frontend, design, and product teams, and solve performance and scaling challenges. The role requires strong problem-solving skills, debugging ability, data structures and algorithms knowledge, startup experience, and comfort using AI-assisted coding tools.

Build and own partner-facing APIs and backend services in a Python web application. Improve database queries and system performance, develop partner dashboards, and deliver integrations from design through deployment. Collaborate with product and commercial teams to support new partner categories, using metrics and AI coding assistants to accelerate delivery. The role requires independent senior-level impact in an ambiguous, fast-paced environment.

Build and maintain scalable billing and monetization systems for subscription, pricing, and payment workflows. Develop large-scale applications using Java, AWS, Lambda, event-driven architecture, REST APIs, and GraphQL. Work with multiple databases, implement automated testing, protect data integrity, and collaborate with internal teams to deliver customer-facing pricing and upgrade experiences.

Designs, develops, tests, documents, and supports secure external data integrations using .NET, Azure, Informatica, Snowflake, APIs, ETL, and file-based interfaces. Leads technical delivery, performs impact analysis, supports production systems, troubleshoots defects, collaborates with business and technology stakeholders, and mentors engineers. The role owns integration architecture and solutions for insurance and financial-services partners, including DTCC and iPipeline feeds.

Lead software architecture across Keeper’s security platforms, including PAM, browser extensions, clients, APIs, and distributed systems. Define scalable technical standards, evaluate architectural trade-offs, guide major design decisions, and ensure security, reliability, performance, and maintainability. Build prototypes, review code, partner with Engineering, Product, and Security leadership, address technical debt, mentor senior engineers, and influence architecture across multiple teams. The role requires strong full-stack, cloud-native, SaaS, identity, authentication, authorization, and secure application architecture expertise.

Develop and enhance Ferguson’s custom Trilogie ERP system across multiple functional areas. Responsibilities include designing business-process solutions, owning software projects through implementation, integrating APIs and web services, collaborating with analysts, product owners, QA teams, administrators, and vendors, writing unit tests, reviewing code, and optimizing performance in high-transaction environments. The role also supports Trilogie’s migration from Unix to Linux and requires extensive UniBasic or Pick-based development experience.

Leads hands-on development of enterprise solutions using Dynamics 365 Sales, Dataverse, Power Apps, and Power Automate. Designs CI/CD pipelines, establishes engineering standards, manages version control and ALM, and ensures solution scalability and maintainability. Mentors engineers, conducts code reviews, collaborates with architecture and product teams, supports Agile delivery, and serves as a technical stakeholder contact. Participates in overnight and weekend on-call support for Broad Arrow Auctions.

Develop, enhance, maintain, and support enterprise case management, document management, and workflow automation platforms. Build IBM BAW workflows, FileNet and Case Manager applications, Java/J2EE integrations, REST/SOAP APIs, and Kofax document-processing solutions. Troubleshoot defects, workflow failures, integrations, and performance issues; perform testing, deployments, production support, modernization, source-code migration, documentation, and knowledge transfer.

Develops, tests, implements, maintains, and supports mainframe applications using COBOL and related technologies. Performs requirements analysis, design, coding, debugging, database integration, testing, documentation, and technical support. Collaborates with customers, business analysts, vendors, and technical teams to deliver solutions aligned with business and architectural standards. Requires knowledge of debit card payment processing and Cardbase, with potential leadership and guidance responsibilities.

Lead technical collaboration with an external partner contributing to OpenCTI. Guide architecture, design reviews, coding standards, contribution quality, roadmap alignment, and risk reporting. Contribute directly to the codebase while mentoring internal and partner engineers through code reviews and pair programming. The role requires strong TypeScript and full-stack experience with NodeJS, React, GraphQL, Elasticsearch, and Redis, plus effective communication in a remote, async environment.