Frontend Developer Jobs in California, United States

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.

Vianai Systems seeks an experienced Frontend Developer to shape and deliver a human‑centered AI experience across its growing suite of machine‑learning products. The role sits within the ML data science and engineering team, building complex, enterprise‑scale interfaces from scratch.

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.

Senior Angular Frontend Developer role at MyTime focuses on building responsive, high‑performance web UIs for a global scheduling and POS platform. The candidate will collaborate with UX designers and engineers to ship scalable features, optimize performance, and maintain code quality through unit tests and reviews.

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.

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.

Frontend Developer Job Summary The Front-End/UI-UX Developer is responsible for translating business requirements into intuitive, responsive, and visually compelling user experiences. This role focuses on UI/UX design, front-end development, dashboard and report design, and collaborating with business stakeholders to create user-centric applications that improve usability, accessibility, and engagement.

We are seeking an experienced Frontend AEM Developer to join our web development team and help build, enhance, and maintain high-performance digital experiences using Adobe Experience Manager (AEM) and modern frontend technologies. The ideal candidate is a strong frontend engineer with hands-on experience in AEM, Sightly, React, JavaScript/TypeScript, CSS, web accessibility, and SEO , and who enjoys working closely with Marketing and Creative teams to translate business requirements into high-qu

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.

Bobyard builds AI systems that automate takeoffs for contractors, saving them dozens of hours per project in a multi-trillion industry still running on spreadsheets and guesswork. As a Frontend Engineer, you'll work on the hardest UI problem the team has: rendering large construction drawings and dense estimate tables without friction, including canvas rendering, pan/zoom performance, and instant-feeling tables with hundreds of rows.

Smack Technologies builds software to enable rapid, AI‑driven target planning for US defense. As a Frontend Engineer you will design and implement collaborative UI tools for visualizing and prioritizing targets, integrating geospatial and data visualizations, and supporting human‑in‑the‑loop decision making.

Sift (Data Infrastructure Platform) builds telemetry-driven insights for hardware engineering teams. The Software Engineer, Frontend creates high‑performance data visualization interfaces and reusable component libraries, collaborates with backend on API design, and writes clean, maintainable code.

Sift is building the data infrastructure platform for hardware engineering teams, turning high‑frequency telemetry into actionable insights. As a Frontend Software Engineer you will build high‑performance data visualization interfaces and reusable component libraries, collaborate with backend teams on API design, and ensure clean, maintainable code.

Frontend Platform Team at Harvey builds shared frontend infrastructure, design systems, and developer tooling to accelerate product delivery. The role creates scalable, high‑performance foundations, partners with product and design groups, and drives adoption across all user‑facing applications.

Glean seeks a creative frontend engineer to build polished, high-performance user interfaces in React and TypeScript, collaborating with designers and backend teams. The role involves owning features from concept to launch, mentoring junior engineers, and pushing platform limits to deliver instant search experiences across web and desktop.

Harvey is a secure AI platform for legal and professional services, scaling rapidly with a strong product‑market fit and backing from top investors. We’re looking for a Frontend Software Engineer to lead projects that shape the user experience across our product lines.

Outset is building AI‑powered user interview platforms that transform qualitative research for enterprise customers. As a Frontend Software Engineer you will design and develop intuitive React and Next.js interfaces, integrate real‑time visualizations, and lead frontend projects from concept to production.

DeForm seeks a Founding Frontend Engineer to build cutting‑edge web3 experiences, verify blockchain data, accelerate AI‑driven workflows, and enable crypto asset distribution. The role blends deep frontend expertise with product ownership, customer collaboration, and a passion for emerging blockchain technologies.

Aida builds conversational AI agents as the core of its AI orchestration layer. The Frontend/Fullstack Engineer designs and architects frontend features from scratch, creates standalone UI component libraries, and develops user‑facing products using React, Typescript and NextJS.