Top Software Engineer Jobs in St. Louis, MO

The Senior iOS Engineer will drive key engineering decisions, enhance the iOS app, and engage in product strategy discussions. Responsibilities include shipping production code and maintaining app architecture.

As a Software Engineer, you'll develop and maintain APIs and backend services for automation in healthcare processes, ensuring reliability and scalability.

The Senior Software Engineer for the Treasury team will develop backend services for fund management, ensuring system reliability and leading projects in a fast-paced environment.

Mudflap seeks software engineers to build and scale their payments platform using Ruby on Rails, collaborating cross-functionally and owning features end-to-end.

As a Senior Full Stack Software Engineer, you'll design and develop end-to-end web applications, handle data architecture, ensure performance, and collaborate across teams to deliver effective technical solutions.

The role involves designing and building scalable web applications, focusing on frontend and backend development, database management, and performance optimization.

Backend engineer to develop and own core CRM and finance services. Work in a fast-growth scaleup, ship quickly using agentic AI workflows, own testing and service quality, and optimize developer tooling and workflows.

Design, develop, and maintain backend and/or frontend features; own scoped projects from implementation through delivery; collaborate with distributed product and design teams; write clean, maintainable, well-tested code; participate in code reviews and engineering best practices.

Design, implement, and maintain scalable serverless backend services and responsive Next.js front-end components. Build data scrapers and integrations, improve CI/CD and IaC, mentor junior engineers, and collaborate with product and clients to solve complex compliance problems.

Lead platform improvements and migrate legacy integrations to a standardized, observable integrations platform. Build reusable frameworks, improve data traceability, deliver visibility tools, strengthen contract safety and resilience, and partner cross-functionally to enable safe incremental rollouts and reliable vendor API integrations.

Join as the founding full-stack engineer to extend a TypeScript React/Next.js prototype, design product features, integrate AI/OCR, write tests and infrastructure, talk to users, and iterate quickly to drive growth.

Build and maintain end-to-end web applications powering sales and operations. Design tools for quoting, scheduling, and fulfillment, integrate AI into products, collaborate on UX, ship high-impact features, and contribute to architecture, deployment, and engineering culture.

Full-stack feature-team engineer working across UI, JavaScript, and backend to build scalable investment portfolio management web applications. Gather requirements with product and users, design solutions, implement and deploy code, and operate in Linux environments. Emphasis on strong computing fundamentals, Ruby on Rails proficiency, user workflow understanding, and clear communication.

Senior .NET Software Engineer responsible for end-to-end software development using Microsoft technologies. Requires extensive experience in SDLC, design principles, technical documentation, web application development with .NET, Agile/SCRUM, Entity Framework, database design, and version control. Familiarity with project tools JIRA, TEMPO, Bitbucket, and Confluence preferred.

Build and optimize high-throughput de-identification pipelines for large clinical datasets, execute QA, run and tune pipelines in health system cloud environments, reduce errors and costs, and collaborate with privacy and clinical informatics stakeholders.

Lead end-to-end full-stack development across React frontends and compiled backends, influence architecture and data modeling, integrate third-party dealership APIs, use AI-assisted coding tools daily, set engineering standards, ship production features to live dealership users, and mentor junior engineers.

Join as a full-stack software engineer to design, develop, and maintain web applications and services. Collaborate cross-functionally, write clean code, perform code reviews, debug issues, and stay current with industry trends.

First engineering hire to build end-to-end features across React frontends and C#/.NET (and Python) backends, work with PostgreSQL and MongoDB, integrate third-party automotive APIs, use agentic AI coding tools, and collaborate on architecture and engineering culture.

Develop, test, and maintain web-based geospatial intelligence applications using Java and/or Python. Integrate relational and non-relational data stores, support GIS-enabled features, participate in code reviews and Agile sprints, apply secure coding practices, and assist with troubleshooting, performance tuning, and documentation.

Design, sequence, and deliver virtualized mission applications for VDI and thick clients. Troubleshoot VDI/app delivery, automate sequencing, persist user settings in non-persistent environments, improve DR/continuity, apply security patches, produce technical documentation, and support VMware/Citrix infrastructure and performance tuning.

Design, build, deploy, and administer large-scale multi-domain Windows desktop environments. Package and deploy client software for physical and virtual desktops, integrate Windows desktops with enterprise services, support O&M across the IT lifecycle, and perform desktop OS upgrades, rapid fix deployment, and security/compliance tasks for a cleared intelligence customer.

Design, develop, test, operate and maintain full-stack, production-ready software. Own end-to-end features, follow DevOps and Agile practices, ensure scalability, reliability, security, conduct and apply code reviews, and collaborate across teams to deliver cloud-native microservices and front-end applications.

The Software Engineer will build features across the stack, design AI/LLM-driven workflows, translate requirements, and collaborate closely with the founding team and customers.

As a Founding Software Engineer, you will build and ship product features for construction workforce management while collaborating closely with founders, influencing product architecture and culture.

As a Full Stack Software Engineer at Goodbill, you'll develop data systems and user experiences, work with diverse data sources, and integrate AI features, ensuring high-quality consumer-facing applications.