Top Senior Front End Developer Jobs in Los Angeles, CA

Architect and build a high-performance trading platform for active traders. Develop responsive web interfaces integrating real-time market data, low-latency execution workflows, and advanced trading tools. Collaborate with cross-functional engineering teams on large-scale initiatives, emphasizing scalability, performance, API quality, maintainability, developer experience, and end-user usability.

Develop and maintain scalable Java and Spring Boot REST services, APIs, and microservices for mission-critical geospatial systems. Support containerization, orchestration, CI/CD, DevOps automation, testing, infrastructure deployment, data platforms, and third-party integrations. Contribute to architecture, performance optimization, troubleshooting, documentation, stakeholder demos, and Agile delivery. The role requires onsite work in Herndon, Virginia and collaboration on national security missions.

Lead frontend engineering for large-scale React web applications. Architect application patterns, structure, libraries, and coding standards; build React applications end to end; conduct code reviews; mentor engineers; promote performance, scalability, and maintainability; and collaborate with designers, product managers, and technical and non-technical stakeholders.

Develop and maintain iOS, Android, and web development platforms for the myQ connectivity program. Lead technical planning across scrum teams, translate product requirements into software designs, implement complex features, oversee releases, improve development processes, and enforce quality standards. The role mentors engineers, leads offshore teams, collaborates with product, architecture, DevOps, firmware, infrastructure, and QA teams, and contributes to architectural decisions, technical documentation, interviews, and continuous improvement.

Senior frontend-focused software engineer responsible for authentication, verification, and fraud experiences across web, mobile, and backend systems. The role owns team goals, designs and delivers highly available systems, collaborates with product and design partners, improves engineering standards, supports operations and on-call efforts, and mentors engineers. Candidates should have strong web application architecture experience, proficiency with React or Vue and JavaScript or TypeScript, and excellent communication skills.

Build and maintain content management systems supporting Disney media brands. Responsibilities include architecting frontend functionality with JavaScript, React, and GraphQL; researching and prototyping features; improving performance and scalability; reviewing code; collaborating with product, design, and engineering teams; mentoring junior engineers; and delivering high-quality web products.

Own end-to-end frontend development for core crypto payment flows across web and mobile. Improve latency, availability, and SLOs; build user-facing features (contacts, real-time transaction status); identify and fix performance bottlenecks; partner with product/design/backend; mentor junior engineers to reduce customer friction at scale.

Own the frontend architecture and implementation of a greenfield legal technology product using React and TypeScript. Build complex workflow experiences, reusable components, state management, forms, validation, API integrations, role-aware interfaces, AI-enabled workflows, and automated tests. Ensure accessibility, performance, responsiveness, browser compatibility, and production quality. Partner with backend, product, and design teams, establish frontend standards, review code, and provide technical guidance to other developers.

Design, build, and optimize responsive, high-performance front-end interfaces for a Web3 DEX using modern JavaScript frameworks and TypeScript. Collaborate with designers, product, and back-end teams to integrate blockchain APIs and smart contracts, mentor junior developers, troubleshoot issues, and contribute to mobile-first/PWA development while ensuring scalability and maintainability.

Lead frontend development for Coinbase identity experiences including login, signup, OAuth, account security, and multi-factor authentication. Own projects from design through deployment and monitoring, guide Native versus Webview architecture, author technical designs, resolve systemic technical debt, lead on-call and incident response, and mentor engineers.

Lead the architecture and delivery of large-scale React and React Native applications across web and mobile. Establish frontend standards for performance, accessibility, reliability, and maintainability; build shared component libraries and design systems; resolve complex frontend and cross-stack issues; partner with product, design, and backend teams; and mentor engineers while shaping technical strategy across multiple product areas.

Own and deliver polished, accessible, high-performance frontend experiences using React and TypeScript. Set frontend technical standards, mentor engineers, use AI-assisted development tools, and contribute to product roadmaps. Build backend services and APIs in Go as needed, collaborate with stakeholders, document user-facing products, and help shape engineering culture and quality.

Build the realtime, HIPAA-compliant messaging and collaboration frontend ('Pulse') that makes an AI colleague feel human. Implement complex interactive data visualizations, micro-interactions, and high-performance accessible interfaces. Work embedded with product and design, own UI quality, iterate on AI-driven specs, and deliver production frontend experiences clinicians will trust.

Design, build, and deliver front-end features with strong UX focus. Own technical design, coding, testing, deployment, and monitoring in a continuous delivery, microservices environment. Collaborate with Product, implement automated QA practices, and contribute to production deployments while practicing robust testing methodologies.

Build and optimize pipelines migrating 8,000+ documentation pages, recreate technical documentation UI components in Angular, manage CI/CD and DevOps workflows, and work with Java backend services and proprietary enterprise infrastructure. Collaborate with design and digital teams, engage directly with clients, lead technical projects, and deliver reliable systems under aggressive timelines.

Own frontend product experiences end-to-end, from problem definition and interaction design through implementation, launch, and iteration. Build polished, responsive interfaces with React and TypeScript, develop reusable components and design systems, and improve performance, accessibility, reliability, and cross-browser behavior. The role requires strong product and UX judgment, sophisticated animations, attention to detail, ownership, and comfort working on ambiguous problems in a fast-paced distributed startup environment.

Develop and enhance interactive enterprise planning, reporting, and analytics web applications using SAP Analytics Cloud and front-end technologies. Responsibilities include implementing UI/UX components, integrating REST APIs and data formats, improving application performance and scalability, reviewing requirements, documenting changes, participating in code reviews, and collaborating with technical teams. The role supports a federal customer remotely and requires Public Trust clearance and U.S. citizenship.

Develop and support interactive enterprise planning, reporting, and analytics web applications using SAP Analytics Cloud and front-end technologies. Responsibilities include building UI/UX components, reviewing requirements and designs, consuming REST APIs, optimizing performance and scalability, debugging, documenting changes, participating in code reviews, and collaborating with technical teams. The role supports a federal customer remotely and requires Public Trust clearance and U.S. citizenship.

Develop and enhance interactive front-end web applications for the Budget and Spend solution using SAP Analytics Cloud and JavaScript. Responsibilities include building planning and reporting applications, implementing UI/UX components, integrating REST APIs and data formats, improving performance and scalability, documenting changes, conducting code reviews, and collaborating with technical teams.

Lead front-end technical strategy for Coinbase Advanced trading platform: define and execute a scalable roadmap, deliver a low-latency interface across web and mobile, mentor engineers, anchor complex projects, and ensure high standards for code quality and system design.

Build and own end-to-end frontend experiences for Coinbase card products across web and mobile. Ship high-scale consumer features, improve payment flow performance and SLOs, reduce latency and CX contacts, mentor engineers, and collaborate with product, design, and backend teams to deliver reliable, user-focused card functionality.

Architect and develop scalable frontend applications supporting sales and operational workflows. Lead frontend architecture, frameworks, tooling, accessibility, security, testing, performance, and maintainability. Mentor engineers, guide technical roadmaps, lead large projects, collaborate with product, design, backend, and platform teams, and modernize internal platforms. The role also champions pragmatic AI-assisted development and supports early-stage product evolution in a complex transactional domain.

Build and own high-performance, customer-facing frontend applications using React, Redux, and TypeScript. Integrate AI-powered features, establish AI development guardrails, optimize scalability and reliability, and maintain design systems, testing standards, and continuous delivery practices. Collaborate with product, design, and backend teams while mentoring engineers and driving features from concept through production.

Build and maintain fast, intuitive frontend applications for blockchain and Web3 products. Collaborate with product, design, and engineering teams; develop reusable components and frontend architecture; integrate wallets and smart-contract interactions; improve performance, reliability, and accessibility; participate in technical planning and code reviews; mentor other developers and establish frontend best practices.

Design and build scalable, performant frontend systems and mobile apps using React, TypeScript, and React Native. Integrate with GraphQL and real-time streams, lead code reviews, mentor engineers, collaborate with product and design, and optimize performance for mobile and variable network conditions in healthcare contexts.