Top Front End Developer Jobs in St. Louis, MO

Build full‑stack vertical slices for a mission-critical legacy modernization using agentic AI tools. Lead frontend UX with React/TypeScript, maintain component library and accessibility, implement Node APIs and Prisma/Postgres schemas, deploy AWS infrastructure, and ensure quality via TDD, CI, and Playwright while shipping small, continuous releases.

Build full-stack vertical slices for a mission-critical government system with a frontend focus: React/TypeScript UIs, Node services, Prisma schemas, PostgreSQL, and AWS. Use agentic AI tools, lead design-system/accessibility, apply TDD and Playwright E2E testing, maintain CI/CD, and iterate continuously with stakeholder review.

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

The Fullstack Engineer will own the marketing site stack, leading development of customer-facing tools, enhancing user experience, and collaborating with design and marketing teams.

Lead architecture and implementation of Aragorn AI's frontend: build scalable React/TypeScript applications, evolve micro-frontend architecture, develop and maintain a reusable design system, optimize performance, collaborate with design and backend teams, own CI/CD for frontend, and drive frontend technical standards and documentation.

Join a remote team as a Front End Web Developer, focusing on SEO implementation and web enhancements on client websites for improved performance.

Join a remote team to enhance web functionality for e-commerce brands through Shopify, data management, and rapid technical support in a growth-driven environment.

Lead the development of a scalable frontend web application for an AI photo platform, recommend technologies, and ensure performance optimization.

Develop and maintain Java backend services for enterprise blockchain applications, integrate APIs with React/Vue frontends, design scalable blockchain solutions, troubleshoot complex backend issues, and collaborate with the team to apply best practices and stay current with blockchain trends.

Build and maintain performant web and mobile trading interfaces using React/React Native and TypeScript. Implement trading flows, wallet integration, real-time data visualization, reusable component libraries, and optimize UI performance under high-frequency updates while handling edge cases and collaborating with backend and wallet engineers.

The role involves developing large-scale applications using HTML, CSS, JavaScript, and React/WordPress, code reviews, and crafting UI components while ensuring high quality and accessibility.

The role involves building creative tools for content editing, enhancing features with PixiJS and WebGL, and improving collaboration workflows.

Build and maintain end-to-end product features across frontend and backend. Design frontend architecture with React, participate in technical design and customer-facing support, document features, collaborate with product, and own projects from spec through launch while ensuring code quality and reliability.

Lead frontend engineering strategy, design and deliver accessible, performant government-facing web applications. Define frontend architecture, tooling, CI/CD, design systems, testing and accessibility practices; mentor engineers and collaborate with product to balance UX and implementation.

We are seeking a Senior Frontend Software Engineer to build advanced web applications using JavaScript and ReactJS, collaborating with a team to enhance user experiences.

Develop and maintain Ubegos frontend products: mobile/web quest experiences, user and creator dashboards, admin panel, marketing features, and third-party integrations. Work in one-week Scrum sprints, perform code reviews, contribute to software architecture, and use modern frontend frameworks, relational databases, and AI-assisted coding tools.