Frontend Developer Jobs in California, United States

Frontend Development team at Photon Group builds modern web applications for enterprise clients. The role designs and implements React.js features, integrates CMS platforms like AEM, and ensures responsive, accessible UIs using TypeScript, HTML5, and CSS3.

National Security Solutions team at KBR builds advanced satellite communications systems for the US Space Force. The Frontend Developer leads Angular-based UI development, integrating REST/GraphQL APIs and ensuring responsive, accessible design.

Software Development Office at Recruiting From Scratch builds innovative enterprise solutions in AI and Devtools. The Lead Frontend Developer drives the creation of scalable React and Next.js applications, collaborates with cross‑functional teams to design and ship features, and optimizes performance across devices.

TagLeaf Engineering team builds intuitive, high‑quality user interfaces for laboratory software. The Frontend Developer leads Vue.js development, integrates with a Laravel backend, and creates reusable components while collaborating with designers, product managers, and backend engineers.

Mercury's Platform Engineering team builds the frontend foundations that power its fintech products. The Senior Software Engineer will evolve React, TypeScript, and Vite infrastructure, automate workflows, and improve CI/CD pipelines to enable rapid, high‑confidence releases.

A seasoned front‑end engineer who builds scalable, high‑performance web and desktop applications. Leads the design and development of core frontend architecture from scratch, rapidly prototyping and iterating features to validate user experience.

Air Apps is a family-founded company building the world's first AI-powered Personal & Entrepreneurial Resource Planner (PRP), with offices in Lisbon and San Francisco. As a Front-End Web Developer, you will craft seamless, high-performance web experiences by collaborating with designers, product managers, and back-end developers to build and optimize user interfaces using modern web technologies.

This role focuses on developing frontend applications for the Lightning Network, enhancing Bitcoin wallet functionality. The ideal candidate will build user interfaces, integrate APIs, and ensure seamless user experiences.

Lightning AI builds an end-to-end platform for developing, training, and deploying AI systems, combining PyTorch Lightning with cost-efficient large-scale compute. As a Frontend Engineer, you will own key UI and frontend infrastructure features end-to-end, writing React and Redux code, setting technical direction, and partnering with engineering, product, and design to ship iterative improvements.

Emergent Labs’ Frontend Engineering team builds autonomous coding agents that generate, test, and deploy production applications from plain‑language intent. The role defines and owns the frontend architectural vision for high‑scale products, translating Figma designs into robust technical architecture while leading performance, accessibility, security, and scalability initiatives.

Wealthfront seeks a Software Engineer, Frontend to join its cross-functional scrum team in building client-facing wealth management products. The role involves designing features using the in-house Design System, improving infrastructure, and collaborating with backend and mobile engineers.

Recruiting From Scratch Frontend Team builds cutting‑edge web interfaces for an AI‑powered API SDK. The Software Engineer (Frontend) develops and maintains high‑quality TypeScript/React applications, collaborates with cross‑functional teams to design and ship features, and optimizes performance and scalability. San Francisco, onsite, Full-time.

Frontend Engineer Intern at Dexmate will push code to production in the first week, building web interfaces for a robot platform that connects humans with physical robots. Working with designers, backend engineers, and robotics teams, the role involves building interactive UI components using Vue 3 or React, implementing real‑time data visualizations for robot status, sensor data, and telemetry, and accelerating development with AI‑assisted tools such as Copilot, Cursor, and Claude Code.

Compiler Team at Persimmons builds the next‑generation compiler that translates AI models into assembly for its accelerator hardware. The role designs and implements compiler optimizations, novel scheduling algorithms, and collaborates with hardware and software groups to improve performance and scalability.

Atlassian is hiring a Frontend Software Engineer to join its engineering team and help build the best project management tool for business teams. You will report to an Engineering Manager, collaborate closely with design and product management, and deliver client code and product capabilities from technical design through launch.

Gigaml is a conversational AI startup focused on automating customer support. They seek a Senior Frontend Engineer to lead the design and development of user‑facing applications, build responsive and accessible interfaces, and drive technical decisions.

Finix seeks a Senior Frontend Engineer to design and build high‑performance payment dashboards and embeddable components that power thousands of merchants. You’ll lead the frontend architecture, create reusable component libraries, and optimize performance for large financial data streams.

Qualified Health is building a generative AI SaaS platform to transform healthcare. As a Staff Frontend Engineer you will craft the user experience, write clean React code, optimize performance, and iterate rapidly based on user feedback while collaborating with the early engineering team.

Gamma’s AI‑powered editor team builds a collaborative web app for presentations, documents, and websites. The role builds the core real‑time editing experience with CRDTs and WebSockets, ships AI features, optimizes performance, and works closely with designers, backend engineers, and product managers.

Tessera Labs builds multi‑agent AI systems that automate complex enterprise workflows across platforms like SAP and Salesforce. As a Frontend Engineer you will design and develop sophisticated UI components, interactive dashboards and data visualizations, optimizing performance and usability while integrating AI model interactions.