Top Senior Software Engineer Jobs in St. Louis, MO

The Senior Software Engineer develops and maintains web applications and APIs, improves architecture, mentors juniors, and ensures code quality.

The Senior Software Engineer will design and develop the PBM adjudication platform, mentor junior engineers, and maintain production systems using various technologies.

The Staff Software Engineer will design .NET infrastructure, automate builds, maintain tooling for .NET libraries, and mentor peers while ensuring security and reliability.

As a Senior Backend Engineer at Socure, you'll develop scalable backend services for identity verification, optimize system performance, and collaborate with cross-functional teams on document processing integrations.

Seeking a Staff Software Engineer to lead the design and evolution of the entity data platform, focusing on data ingestion, resolution, and delivering accurate data. Responsibilities include system architecture, improving reliability, and mentoring team members.

The Senior Software Engineer will design and operate data ingestion and processing systems for multimodal data, ensuring quality, security, and compliance while optimizing for performance and reliability. Responsibilities include building pipelines, handling messy data, and partnering with teams to enhance the platform's capabilities.

The Senior Software Engineer will design and build backend services, collaborate with teams, and ensure secure coding practices in a remote role.

The role involves designing, building, and maintaining software solutions, mentoring junior engineers, and participating in architectural decisions while utilizing AI tools for development.

The Senior Software Engineer will modernize USPS shipping technology, refactor legacy systems for cloud integration, and develop high-performance services using Go, while collaborating with teams and addressing production challenges.

The role involves end-to-end ownership of AWS infrastructure, managing Kubernetes platforms, and ensuring system reliability through observability and automation. Responsibilities include incident response and maintaining CI/CD systems.

The Principal Software Engineer will lead the technical vision for cloud-native applications, mentor engineers, and ensure high standards in architecture and development.

The Senior Software Engineer will design, build, and scale backend services for core products at Flex, focusing on Payments and Billing. Responsibilities include leading projects, making independent technical decisions, and mentoring teammates. Requires strong experience in Java and AWS services.

Seeking a Senior Software Engineer with 5+ years of experience to design and develop large-scale distributed systems, mentor junior engineers, and manage complex projects in a dynamic setting.

Lead development of SDR embedded software for LEON3 softcore processors: design and implement embedded C/C++ and Python firmware, autoboot FPGA/softcore loading, integrate SpaceWire and other interfaces, manage RTEMS cross-compilation, perform HW/SW integration, debugging, verification, and maintain requirements traceability and documentation.

The Staff Software Engineer will design and build scalable systems, lead architecture decisions, mentor engineers, and improve existing platforms using PHP, Node.JS, and AWS.

The Senior Software Engineer will own the React Native mobile codebase, collaborate with cross-functional teams, and ensure high-quality delivery of customer-facing applications.

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.

Lead design and implementation of a headless Optimizely DXP front-end using Next.js on Vercel for 150+ marketing sites. Define content models and architectural standards, implement personalization and A/B testing, optimize performance and accessibility, manage CI/CD and repository ecosystems, and mentor engineering peers to enable repeatable, scalable site launches.

The Senior Software Engineer will design and deliver high-performance integration systems, manage end-to-end ownership of integrations, and ensure reliable compliance data flow across complex environments.

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

The Senior Software Engineer will design, implement, and test secure applications for Identity and Access Management, leading code reviews and ensuring high-quality delivery while maintaining testing environments.

The Senior Software Engineer will enhance patient experiences by developing modern software for doctor's offices, contributing to product features, and participating in client feedback.

As a Senior Software Engineer, you will develop key product features for millions of users, collaborate with teams, and mentor others.

Develop user interface components for ArcGIS Pro using C# and WPF, work in an agile team, and design software solutions for raster and imagery processing.

The Senior Software Engineer will develop and optimize systems for aerospace communications, manage project priorities, and contribute to various technical initiatives.