Top Software Engineer Jobs in St. Louis, MO

As Staff Software Engineer at Twilio Stytch, you'll build and maintain scalable identity platforms, collaborating with leadership and mentoring engineers while ensuring security and performance.

You will enhance client onboarding by integrating with core provider APIs and improving product services, while ensuring clean, documented code.

Design, develop, and deliver scalable backend systems and components using .NET 10 and C#. Build and maintain databases and messaging infrastructure (PostgreSQL/SQL Server, RabbitMQ), deploy with Docker and AWS, apply DDD and ORMs, triage/prioritize work, and contribute to distributed, event-driven architecture with emphasis on reliability and idempotency.

Design and implement new search features and fixes in Elasticsearch, invent or implement algorithms/data structures, collaborate with a distributed team, contribute to Lucene, and build scalable search functionality for serverless platforms.

As a Senior Software Engineer at PerfectServe, you'll design, build, and maintain high-quality code for healthcare communication systems, mentoring junior engineers and collaborating across teams to improve patient care and clinical workflows.

Develop and maintain scalable, secure browser extension features using JavaScript/React/TypeScript. Write tests (Jest/TDD), collaborate with product and design, optimize performance and security, refactor and fix bugs, and uphold code quality through reviews.

The Senior Software Engineer will develop features using TypeScript, React, and Node.js, enhance system performance, and collaborate closely with a team to deliver impactful solutions.

Design and implement cross-platform features for KeeperChat (desktop, mobile, web). Build and maintain .NET/C# MAUI clients and React web UI, optimize performance and reliability, participate in code reviews, collaborate with product/design/backend teams, and mentor junior engineers while upholding security and code quality.

Architect and implement scalable React/TypeScript user interfaces for web and Electron desktop apps. Integrate native modules (C++/Objective-C), work with REST APIs under zero-knowledge principles, optimize performance and accessibility, lead code reviews, mentor engineers, and participate in CI/CD and automated testing to deliver secure, high-quality features.

Lead design and implementation of health data products, mentor engineers, own multiple projects, and develop scalable data solutions using modern technologies.

The Senior Software Engineer will lead development, mentor engineers, and create data solutions using TypeScript, React, and Python. Responsibilities include designing applications, driving innovation, and ensuring high-quality user experiences.

Lead design and implementation of products, mentor engineers, drive innovation, and build scalable data solutions using modern tech stack.

As a Senior/Staff Software Engineer, you will design and implement products, guide other engineers, and drive innovation in health data solutions.

Lead full stack engineering projects, collaborate with teams, troubleshoot production issues, mentor engineers, and ensure project alignment with business goals.

Technical leader designing scalable APIs and agent interfaces for autonomous advertising agents. Build high-throughput real-time systems, evaluate agent protocols, drive architecture, mentor engineers, and integrate external ad platforms.

Design and build cloud-native systems, develop scalable applications with modern technologies, implement Infrastructure as Code, and collaborate in agile environments.

The Senior Software Engineer will develop, maintain, and improve software for SkySlope, focusing on collaboration, innovation, and effective communication while managing project deliverables and providing mentorship to peers.

The Software Integration Engineer will design and maintain system integrations, build open-source SDKs, engage with developers, and collaborate on solutions for mission needs.

As a Senior Software Engineer, you'll develop Hudl's front-end platform, build infrastructure using AWS and Terraform, and serve as a consultant for front-end work.

As a Senior Software Engineer, you will lead the development of Dutchie's ecommerce platforms, focusing on front-end technologies to optimize user experiences for cannabis retailers and consumers.

Develop software for cancer detection by building reliable, scalable backend services. Collaborate with teams and lead projects in a dynamic environment.

The Senior Software Engineer for Data Acquisition will build operational data pipelines and services to collect and manage health data efficiently while working collaboratively with the engineering team.

In this role, you will lead the development of automation tools, architect systems, mentor engineers, and enhance developer experience and supply chain security.

Lead QA efforts across Agile sprints: create test strategies and plans, design and maintain automated test frameworks, run regression, integration, browser/mobile, performance, and security tests, integrate tests into CI/CD, track defects, report quality metrics, and mentor team members to improve testing practices.

The Lead Software Engineer will develop IVR solutions and omnichannel APIs, collaborate with teams, support cloud infrastructure, and resolve incidents.