Frontend Developer Jobs in Missouri, United States

Photon Group is hiring a Frontend Developer on a contract basis in the United States. The role involves developing and maintaining responsive web applications using modern front-end technologies.

1Password is growing. We’ve surpassed $400M in ARR and we’re continuing to accelerate, earning a spot on the Forbes Cloud 100 for four years in a row and teaming up with iconic partners like Oracle Red Bull Racing. About 1Password At 1Password, we’re building the foundation for a safe, productive digital future.

Asteri AI platform enables enterprises to orchestrate AI‑driven work intelligence. The Senior Frontend Engineer leads the evolution of user interfaces and front‑end architecture, building high‑performance web applications that surface complex orchestration workflows and AI insights.

Tristero's mission is to increase individual sovereignty by building a privacy‑focused on‑chain exchange platform. As a Frontend Engineering Lead you will architect ultra‑low latency trading interfaces, optimize multi‑chain state management, and guide a small team of React developers to deliver a best‑in‑class Dapp.

At ClickUp, you will drive the long-term technical vision for frontend engineering within the first truly converged AI workspace unifying tasks, docs, chat, calendar, and enterprise search. As a Principal Frontend Engineer, you will lead architectural strategy across major product surfaces, solve company-wide frontend challenges, and partner with engineering, product, design, backend, and integrations leadership to keep systems fast, reliable, and adaptable.

Doppel’s Frontend Platform team is building a comprehensive infrastructure to enable AI-driven code generation and streamline frontend development. As a Senior Engineer, you will design the application shell, evolve the design system into a strict contract, and build pipelines that allow designers to ship production-ready interfaces without manual coding.

Seeq’s Frontend Design Systems Engineer leads the evolution of the company’s design system, crafting high‑quality UI primitives, reusable application patterns, and foundational components that power data‑dense workflows. The role collaborates closely with UX, Product, and Engineering teams to translate user workflows into scalable, accessible, and developer‑friendly solutions, while ensuring the system adapts to AI‑driven interfaces.

Implicit AI Knowledge Engine team builds a no-code AI platform that transforms unstructured documentation into structured knowledge for maintenance and support. As a part-time Frontend Engineer you will develop responsive web interfaces, collaborate with data science and product teams, and ensure high performance and code quality using React, TypeScript and modern web tools.

AI Training team at Weekday AI builds AI-driven initiatives to improve user interfaces. The Frontend Software Engineer will translate design specs into production-quality, responsive web components, optimize performance, and support AI model evaluation.

stockapp.com team builds a stealth commerce and AI platform targeting a $30T underserved market. The Software Engineer, Frontend will own and scale web and AI experiences using TypeScript, React, and Next.js, collaborating with engineers and designers to ship features fast.

Taekus is a profitable fintech and travel startup building a next-generation premium banking and rewards ecosystem for affluent customers. As a Senior Frontend Engineer, you will take designs from the design team and bring them to life in React, collaborate with designers and engineers to scope features, participate in code and design reviews, write maintainable code and tests, and set frontend architecture standards and patterns while providing guidance to team members.

Vetcove is modernizing the veterinary software and pet parent healthcare experience through a procurement marketplace, ecommerce delivery, and practice management systems used by 25,000+ hospitals. As a Staff Frontend Engineer, you will lead the architecture and evolution of user-facing experiences across web and mobile, define frontend strategy and best practices, build shared component libraries and design systems, and mentor engineers while partnering with product, design, and backend teams.

Frontend Engineering at Prophet Security builds the user experience for its AI-driven security automation platform. The role leads architecture, performance, and design of the React/TypeScript frontend, creating component libraries and design systems while collaborating with product, design, and backend teams.

LangChain is building the infrastructure that powers the next generation of AI applications, with a mission to make intelligent agents ubiquitous. As a Senior Frontend Platform Engineer on the Design Systems team, you will build, own, and evolve LangChain's component library, partnering closely with designers and product engineers to turn design intent into robust, reusable React components and tooling.

Tristero's mission is to increase individual sovereignty by building a Binance-grade on-chain exchange platform. As a Front-End Engineer you will create high‑performance trading interfaces, optimize state management across multiple blockchains, and implement robust transaction handling.

Jarvis ML, a cutting‑edge prediction engine, empowers companies to harness existing data for complex problem solving. With a team boasting over 50 years of Google experience, we build enterprise‑grade products.

Software Engineering at Natera builds cutting‑edge web applications for genetic testing platforms. The Senior Frontend Engineer designs and develops scalable React and TypeScript features, creates reusable UI components, and optimizes performance and accessibility.

ClickUp is building the first truly converged AI workspace unifying tasks, docs, chat, calendar, and enterprise search, supercharged by context-driven AI. As a Senior Frontend Engineer, you will build and improve core product experiences by architecting efficient, reusable frontend code, collaborating with product, design, backend, and integrations teams, and delivering high-impact features in a fast-moving environment. This remote role is based in the United States.

Halliday builds a unified cross-chain payments ecosystem. As a Senior Frontend Engineer you will design and develop high‑performance React/TypeScript interfaces for blockchain payments, create reusable design systems and testing frameworks, and contribute to public SDKs and APIs.

Senior Frontend Engineer at CSC Generation, a multi‑brand AI‑enabled retail platform. Builds robust, accessible web experiences using React, TypeScript, and AWS, collaborating with cross‑functional teams to deliver new features and maintain high code quality.