Top Software Engineer Jobs in St. Louis, MO

The role involves developing software for Linux-based systems on autonomous devices, optimizing performance and ensuring reliability in various hardware environments.

As a Software Engineer at Canonical, you will collaborate globally to shape open-source software operations, focusing on Python and Golang development, enhance DevOps workflows, and improve infrastructure operations for cloud computing solutions.

The role involves designing and delivering open source software operations code in Python, ensuring system reliability, and collaborating with teams across the Linux stack.

Build and maintain scalable, cloud-native full‑stack features and services. Collaborate with Product and Design to prototype, deliver, and document solutions. Work across backend and frontend, apply modern engineering practices, mentor teammates, and own product domains to improve transit operations.

Build and ship production-grade features across frontend and backend, scope and lead projects, mentor engineers, and contribute to product and technical roadmap using the company tech stack.

Build, maintain, and scale cloud-first microservices using TypeScript/Node.js. Contribute to front-end features with Angular, optimize SQL and NoSQL queries, use CI/CD pipelines, adopt AI-assisted tools, participate in Agile ceremonies, and collaborate with senior engineers to deliver reliable software.

The Senior HPC Cluster Engineer will optimize GPU clusters, troubleshoot InfiniBand networks, integrate new hardware, enhance automation systems, and manage GPU devices in HPC environments.

Build, maintain, and operate Mission Control web app and supporting microservices for satellite operations. Implement HTTP APIs, design and deploy infrastructure, automate workflows, ensure CI/CD and testing, collaborate with cross-functional teams to support spacecraft scheduling, telemetry, and operational needs.

The Senior Software Engineer will lead projects, architect solutions, mentor junior staff, and work full stack on platform development.

Design, implement, and maintain backend services and core APIs (primarily Scala). Collaborate on architecture, improve system reliability, and deliver production software for legal AI products.

The Software Engineer will design, develop, and install software solutions, focusing on web applications using PHP and ensuring coding standards and technical design compliance.

The Senior .NET Software Engineer will drive development of .NET software products, focusing on back-end engineering, code reviews, and collaborating with cross-functional teams.

Design, build, and scale GraphQL and gRPC APIs and SQL queries powering the sportsbook marketplace. Own end-to-end feature delivery, performance diagnostics and remediation, release and deployment windows, monitoring in DataDog, and on-call rotations. Mentor peers, draft technical proposals/specs, and improve platform scalability through load testing, tracing, and production hygiene.

Lead design and implementation of the Libraries Platform: services, pipelines, and package index to build, verify, and serve secure reproducible libraries. Automate artifact creation, CVE remediation, SBOM/provenance generation, AI-assisted patching, and operate registry/mirroring, CI/CD integrations, reliability, observability, and incident response while mentoring engineers.

Senior engineer responsible for designing, building, and operating scalable data ingestion, processing, storage, and member-facing membership application. Drive architecture decisions, mentor engineers, build data pipelines, APIs, and ensure reliability, observability, CI/CD, and documentation while partnering with product and analytics stakeholders.

The fellowship offers hands-on experience in software engineering, focusing on data engineering, cloud-native applications, and Agile workflows with mentorship from experienced professionals.

The Software Engineer will work on Automattic's products, focusing on scalable systems, code reviews, and product design, while collaborating globally.

As an Android Software Engineer, you'll design and develop applications, enhance Android components, and improve telemetry solutions for device reliability in rugged tech environments.

As a Senior Full-Stack Engineer, design and build scalable UI systems, own features end-to-end, collaborate on API design, and ensure production quality.

The Software Engineer will design and implement reliable services and APIs using Golang and Python, ensuring performance, scalability, and system reliability while collaborating with cross-functional teams.

Build and optimize Azure Storage’s hyperscale distributed file system. Responsibilities include designing and implementing storage features, analyzing performance, ensuring availability, security, reliability, and durability, creating technical designs, estimating work, monitoring services on call, and improving observability and operational efficiency at scale.

Develop, design, and implement code for Azure hyperscale WAN features; gather requirements, estimate and decompose work, participate in on-call DRI duties, monitor reliability and performance, and troubleshoot large-scale distributed systems.

Job posting for Microsoft Software Engineer (IC3/IC4 levels). Lists base pay ranges for U.S. and SF/NY metro areas, application timing, and equal opportunity statement. No specific responsibilities or technical requirements provided.

Design, develop, and maintain web and mobile features using React/React Native. Build scalable backend services (C#, TypeScript, Ruby on Rails) and RESTful APIs. Work with AWS (ECS/EKS/Lambda), Terraform, Kafka/Debezium, and databases. Collaborate with product and design, follow CI/CD and best practices, and operate autonomously.

Lead complex software projects, mentor engineers, and set technical direction at Vanta while contributing to security and compliance solutions.