Top Software Engineer Jobs in St. Louis, MO

Design, develop and maintain mainframe applications and IDMS databases using COBOL. Analyze user needs, design system components, modify databases, produce database descriptions, coordinate installations, estimate project time/cost, and collaborate with engineers and clients on federal projects.

Develop and maintain scalable gameplay and game systems for a first-person VR flight simulation in Unreal Engine 5. Responsibilities include gameplay, interactions, animation, physics, UI, C++, Blueprint scripting, asset and content-pipeline integration, debugging, profiling, optimization, and technical leadership. Collaborate with designers, artists, technical artists, and production teams while mentoring engineers and supporting architectural and development decisions.

Lead the design and development of mission-relevant software, build backend services and APIs, mentor engineers, and support technical demos.

Develop and maintain calibration, automation, and tooling software for quantum processors. Design and implement front-end and back-end systems, APIs, and databases; troubleshoot performance issues; collaborate with scientists and engineers; and mentor junior engineers.

The Principal Software Engineer will lead technical initiatives, align cross-functional teams, establish standards, and guide multiple engineering teams towards strategic objectives, driving large-scale improvements in business outcomes.

Leads Root’s Telematics Technology engineering domain, overseeing telematics data platforms, feature stores, trip pipelines, APIs, and customer-facing experiences. Responsibilities include setting technical strategy and roadmaps, partnering with Data Science, Pricing, and Underwriting, managing and developing engineering teams, recruiting, guiding distributed-system architecture, and improving reliability, observability, scalability, delivery processes, and production stability. The role also drives AI-tool adoption and may oversee production machine-learning systems.

Build and scale full-stack platforms for independent insurance agents, with a front-end focus. Develop, test, deploy, monitor, and support resilient software solutions; collaborate with Design, Product, engineering teammates, and business stakeholders; investigate customer problems; resolve production incidents; document work; and improve code and development processes.

As a Founding Forward Deployed Engineer, you will create AI solutions for clients, collaborate with teams, and manage deployments to solve business challenges, leveraging your technical expertise and client-facing skills.

The Senior Data Infrastructure Engineer designs and scales data platforms on AWS, optimizing performance, cost, and security while mentoring junior engineers.

Oversee engineering teams driving modernization in healthcare technology through agile practices, AI-assisted engineering, and strong architectural guidance, ensuring quality and compliance.

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.

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.

Build and ship full-stack SaaS features across database, API, and interface layers. Own work end to end, including scoping, implementation, testing, rollout, and post-release operations. Collaborate with product, design, and support; improve system reliability and performance; review code; participate in on-call; and mentor teammates. The role uses Node.js, TypeScript, React, PostgreSQL, relational databases, SQL, observability tools, and AI-assisted development workflows.

Designs, develops, and operates Java-based cloud-native applications on GCP. Builds RESTful APIs, AI-enabled capabilities, secure services, CI/CD pipelines, infrastructure-as-code, and observability practices. Troubleshoots production issues, performs root-cause analysis, supports compliance and secure engineering standards, and collaborates with DevOps, QA, product management, and security teams. Participates in architecture reviews, code reviews, technical documentation, and shared engineering standards.