Top Software Engineer Jobs in St. Louis, MO

As a Senior Software Engineer on the Identity team, you will enhance systems that process billions of events, ensuring performance and stability. Collaborate with teams to design algorithms for user identity, manage data quality, and improve capture accuracy.

As a Senior Software Engineer, you will create human-in-the-loop and fan-in-the-loop interfaces for AI-driven sports statistics, collaborating with teams to integrate AI models and build dynamic fan experiences across platforms.

The Senior Software Engineer will develop full stack software using Typescript, MySQL, React, and Next.js, oversee features from conception to production, and collaborate across teams at Ethena.

Develop and maintain data lake platforms, write reliable code for data pipelines, and collaborate with senior engineers on design and architecture.

The role involves designing and developing full-stack features using Angular and Java/Spring Boot, building scalable services, and optimizing system performance. Responsibilities include API design, technical documentation, and collaboration with engineering teams.

The R&D Engineer will build and refine software solutions for defense use cases, prototype systems, and convert stakeholder feedback into technical requirements. Collaboration with engineering teams and customer-oriented engagements are key responsibilities.

Lead large-scale technical initiatives on the Data Ingestion Team, focusing on building and operating distributed systems that process billions of events daily.

The Senior Full-Stack Software Engineer will develop and support the eCommerce platform, focusing on backend systems and API development using microservices architecture. Responsibilities include collaboration, mentoring, and automation of quality assurance processes.

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

Software Engineers at Regrello will design and maintain full-stack solutions while collaborating across teams to deliver impactful products.

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.

Design and build high-throughput database integrations and data-intensive systems. Ensure end-to-end reliability, debug production issues, improve tooling and observability, participate in on-call rotation, collaborate with customers and cross-functional teams, and drive product and open-source innovation.

The Software Engineer will manage data collection, optimize cloud infrastructure for data ingestion, and collaborate with AI researchers to enhance datasets for model training.

Develop and deliver high-quality software on Windows, focusing on innovative features with strong C# and WPF skills, while optimizing performance and collaborating with teammates.

As a Senior Frontend Software Engineer, you'll design and develop high-performance, data-intensive applications, optimizing user experiences while collaborating with team members to enhance application quality and performance.

Lead design, development, and support of enterprise backend integrations. Build and enhance REST and SOAP APIs, evolve data/service models, develop scalable integration components, troubleshoot production issues, influence architecture, mentor engineers, perform design/code reviews, and collaborate with vendors and cross-functional teams to deliver reliable integrations.

Design, develop, and maintain scalable Python applications; collaborate with cross-functional teams to deliver features; ensure performance and quality; identify and fix bugs; maintain code quality and automation; lead and mentor team members using agile practices.

Designs and implements scalable software solutions as a Calypso SME, integrating Calypso with market utilities, developing Java/MQ/APIs, applying Agile best practices, conducting code/design reviews, and mentoring engineers.

Build and operate production custody systems: signing service, key management, chain integrations, and transaction pipelines. Own end-to-end subsystems, integrate new chains, collaborate with cryptography on threshold signing and key recovery, write post-mortems, and produce clear async design docs and PRs.

The Backend Software Engineer will develop APIs, maintain the codebase, write testable code, and ensure systems are efficient and scalable while collaborating in an agile environment.

The Software Integration Engineer will develop migration services, enhance file processing products, and collaborate with teams to optimize high-throughput services on the VGS platform.

Architect, build, and maintain scalable full‑stack applications using React, TypeScript, Node.js, and AWS. Own features end-to-end, optimize performance and usability, collaborate with founders, and use AI tools to accelerate development in a fast-paced startup.

Build polished, maintainable React-based front-end product experiences; evolve front-end architecture and component patterns; translate ambiguous product ideas into executable plans; collaborate with product and design; prioritize UX quality, testing, and pragmatic tradeoffs; mentor and raise team effectiveness at the Staff level.

Design, build, and operate end-to-end backend services, APIs, and web applications. Own features from design through production, maintain integrations, improve CI/CD and observability, troubleshoot full-stack incidents, participate in on-call rotation, and raise engineering standards.

Lead design and implementation of batch and stream loading systems to ingest terabytes daily. Provide technical leadership on the Streamloader team, collaborate with architects, engineers, product, sales, and customers, and develop high-performance distributed software in C++ and/or Java while ensuring system reliability and customer success.