Top Software Engineer Jobs in St. Louis, MO

Software Engineer Interns collaborate with software and test engineers to code, debug, document, develop automated tests, and implement software components. They translate user stories and requirements, support technical design and planning, and participate in testing and implementation within an Agile environment. The 10-week remote program provides practical experience to students pursuing technical degrees, with exposure to enterprise integration, APIs, event streaming, data integration, and generative AI tools.

Build and scale Neuroscale’s backend platform for AI-powered recruiting workflows. Responsibilities include developing Python/FastAPI REST APIs, designing high-throughput systems, managing PostgreSQL, Redis, OpenSearch, Celery, and Temporal infrastructure, deploying services on AWS, maintaining containerized CI/CD pipelines, and supporting integrations, data pipelines, and asynchronous workflows. The role owns architecture and reliability decisions, mentors engineers, and collaborates with AI, product, and frontend teams in a high-ownership startup environment.

Develop and deliver production-grade full-stack software across .NET/C# backend services and React front-end applications. Build reliable, scalable AWS cloud solutions, optimize relational and document databases, implement CQRS, and integrate AI-assisted coding workflows. Validate AI-generated code for security, quality, and maintainability while establishing guardrails and review processes. Collaborate with Product and QA, participate in code reviews, uphold engineering standards, and mentor other engineers.

Develop scalable SAP ABAP solutions for FI/CO processes, including AP, AR, GL, Asset Accounting, and Controlling. Perform OO ABAP development, unit testing, debugging, performance tuning, and enhancements using cloud development practices. Communicate technical concepts effectively in written, verbal, and presentation formats.

Develop chromatography data-processing algorithms for cloud-based Empower data systems and collaboration software. Responsibilities include implementing peak integration, calibration, and quantitation algorithms; migrating legacy C++ to .NET Core/C#; applying numerical methods and AI/ML; optimizing performance through parallelism; writing unit tests; refining requirements with stakeholders; and preparing technical reports, patents, and project updates.

Leads Oura’s Women’s Health software engineering organization, overseeing managers and technical leaders while partnering across Product, Design, Science, Clinical, Regulatory, and Data Science. Drives high-impact consumer software delivery, organizational transformation, engineering strategy, talent development, and AI-native development workflows. The role requires strong technical and product judgment across architecture, data, quality, reliability, privacy, and speed, with responsibility for building a high-performing organization and trusted health experiences.

Own the frontend codebase as the initial frontend engineer, building and shipping React and TypeScript features for a complex WealthTech platform. Lead frontend architecture, testing, performance, accessibility, design systems, code review, and release practices. Collaborate with the CTO, CEO, and product delivery team to make financial planning workflows usable, improve the existing application without a rewrite, and lead it to general release. Help grow the frontend team over time.

Lead iOS engineering for the Subscription Growth team, building and improving premium subscription experiences, paywalls, upsell experiments, and promotional offers. Develop high-quality, testable solutions, refactor architecture, support automated app builds and releases, and collaborate across iOS, Android, web, backend, and infrastructure teams. Provide technical leadership, mentorship, and guidance on design, security, testing, deployment, and rapid experimentation.

Leads software engineering strategy, architecture, technical project delivery, and development team management. Designs scalable cloud-native solutions, contributes hands-on to software development and code reviews, and promotes generative AI, DevOps, CI/CD, automated testing, and agile practices. Oversees .NET, C#, SQL Server, API, microservices, and AWS or Azure technologies while aligning technical initiatives with corporate growth objectives and communicating with executives and business stakeholders.

Build and deploy full-stack enterprise product solutions for ElevenCreative customers. Work directly with enterprise clients to understand requirements, present solutions, and decide between bespoke integrations and broadly useful product improvements. Develop integrations, APIs, authentication, SSO, access controls, and other enterprise functionality while shipping independently with minimal direction. Experience with localization, TMS integrations, marketing tools, or adtech is advantageous.