Top Software Engineer Jobs in St. Louis, MO

The Senior Software Engineer will architect and develop the Solver network, ensuring performance, collaborating with teams, and leading engineering standards.

The Senior Software Engineer will enhance Flow protocol's architecture, improve performance, and ensure reliability for decentralized applications and services.

Lead team in developing Enterprise B2B solutions, uphold quality standards, drive AI adoption, mentor engineers, guide architecture and legacy modernization efforts.

The Senior Software Engineer will design and implement backend solutions for a social casino platform, collaborate with team members on architecture, and review code, while ensuring the product meets user needs.

The Open Source Engineer will expand LanceDB's integration with big data systems, manage dataset operations, and enhance open-source community efforts.

Own and deliver server-side features end-to-end for a cloud-hosted accounting SaaS: design data models and APIs, improve performance and reliability, mentor engineers, ensure observability and on-call readiness, collaborate with product and clients, and apply AI-assisted development safely to accelerate delivery.

The Senior Software Engineer role involves modernizing healthcare payment systems using C#, .NET, SQL, and cloud technologies while leveraging AI tools for efficiency.

Technical lead individual contributor who architects and delivers complex cross-team, customer-facing product initiatives. Partners with Product, Design, and Data to translate ambiguous problems into scalable solutions, raise engineering standards through code review and mentorship, address technical debt and performance, and influence roadmap and technical strategy.

Lead test strategy and build scalable automated test frameworks for a custom Linux kernel. Validate performance, reliability, and security; develop test suites for kernel enhancements and VM software; debug low-level system issues; enhance CI/build automation; provide technical leadership and mentor junior engineers.

Lead design and delivery of the public-facing API platform and ingestion services. Build scalable, reliable real-time distributed systems, collaborate with product and data teams, review designs and code, address technical debt, take operational ownership using observability tools, and mentor engineers.

Lead test strategy and build scalable automated frameworks to validate performance, reliability, and security of a custom Linux kernel for AI/Compute platforms. Design CI/CD and build automation, develop test suites for kernel and VM software, debug low-level system issues, benchmark performance, and provide technical leadership and mentoring.

As a Senior Software Engineer, you'll build and operate the ML platform, optimizing data operations, managing the feature store, and supporting ML initiatives while driving architectural roadmap decisions.

Design, develop, and maintain scalable storefront ecommerce systems and APIs across backend and frontend. Lead complex customer-facing features (browsing, product pages, cart, checkout), optimize performance, drive architecture and testing best practices, debug production issues, mentor engineers, and collaborate with product, design, and mobile teams to deliver high-quality, high-scale solutions.

The Staff Software Engineer will design and develop scalable cloud services, focusing on AI infrastructure, with hands-on system architecture, mentoring, and engineering culture shaping responsibilities.

Own and evolve ClickHouse's Python connector and SDKs; build and maintain integrations with orchestration and transformation tools; design AI/LLM integration patterns (RAG, embeddings, feature stores); engage with open-source community; collaborate with Product and Cloud teams to prioritize and ship production-grade data integrations.

Develop AI/ML-powered features in ClickHouse Cloud, focusing on frontend and API architecture, UI/UX, and integrations with AI systems.

The Senior Software Engineer will build scalable backend systems, design APIs, and integrate ML models, enhancing Yahoo's search functionality.

The Senior Software Engineer will design and build a collaborative web platform, managing backend and frontend systems, mentoring junior engineers, and driving architectural decisions. Responsibilities include API design, code quality assurance, and integrating AI into the development workflow.

Work on the Web Platform team to design, build, and scale a new content management system. Contribute to front- and backend services, participate in Agile sprints, make technical decisions, mentor teammates, and help migrate and improve content delivery and cloud infrastructure.

Design and develop scalable software solutions, lead engineering workstreams, ensure code quality, mentor junior developers, and collaborate on technical strategies to enhance digital experiences for BECU members.

Design, build, and maintain scalable .NET and Angular web applications across the full stack. Lead technical architecture, implement CI/CD pipelines, execute application and database migrations, write and test clean code, debug production issues, produce technical documentation, and mentor peers while collaborating with product, QA, and cross-functional teams using agile practices.

Senior SDET who contributes across frontend and backend systems by building and maintaining features with a strong testing mindset. Develop and maintain automated tests, improve test coverage and CI/CD, investigate bugs, support regulatory and compliance testing strategies, and balance automation with exploratory and risk-based testing.

Build and scale developer platform and AI-powered tooling to improve developer velocity, CI/CD observability, and Kubernetes reliability. Implement agentic coding/review workflows using LLMs, create self-service templates and automation, contribute to incident playbooks, and drive adoption via docs and enablement.

Lead architecture and technical direction for StrongDM's Go-based distributed proxy and control-plane. Drive design decisions for proxy data plane and control-plane services, enforce performance and security standards, resolve complex production issues, author architectural documentation, mentor engineers, and coordinate cross-team roadmaps.

Design, build, and maintain scalable ETL/ELT data pipelines and backend services. Implement data validation, monitoring, performance optimizations, CI/CD, and operational support while partnering with product and business stakeholders.