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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Frontend Engineer, Platform - **Company:** Doppel Inc. - **Location:** New York, NY, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Code Generation, Cyber Security, Design of User Interfaces, Human-Computer Interaction, Mobile Application Software, Software Engineering, TypeScript, Web Applications, ReactJS, Backend, Agentic-AI, Data Layers, Material UI, Production Code, Figma, Graphql, Front End Software Development - **Published:** October 27, 2026 - **Apply:** https://www.careerbuilder.com/job-details/frontend-engineer-platform-san-francisco-ca--e56e0215-cfa8-4a79-952c-5e5f264ac48a ## About the Role User Interface/Experience (UI/UX), Artificial Intelligence (AI), Social Engineering, Social Media, Encryption Software, Mobile Applications, Computer Security, User Interface/Experience (UI/UX), Relay, Artificial Intelligence (AI) Agents, * 5+ years of software engineering experience with deep expertise in React and TypeScript, building and operating production web applications. * Experience owning platform-level frontend work: design systems, component libraries, build tooling, data-layer patterns (Relay or similar GraphQL clients), or frontend infrastructure other engineers build on. * Genuine excitement about AI-assisted development - you see agents as a way to raise the abstraction level of frontend work, and you want to build the rails that make that safe. * A platform mindset: you measure success by what other teams (and designers) can ship without you, not by features you shipped yourself. * Comfort operating in ambiguity - the team's charter is being defined in real time as the company grows, and you'll shape it rather than inherit it. * Familiarity with production monitoring and performance work (RUM, SLOs, error budgets) is a strong plus. * Experience collaborating deeply with designers - design tokens, Figma workflows, Storybook-driven development - is a strong plus. * Strong communication skills: your customers are product teams, designers, and backend platform engineers. * Product-minded, highly autonomous, and comfortable in a fast-paced startup environment. ## Description We're looking for a senior frontend engineer to elevate every aspect of UI/UX across our core product platform. You'll work closely with our lead designer to create a cohesive, performant, and modern user experience that instills confidence and trust in enterprise customers. Your work will directly influence seven-figure deals and how customers and internal teams interact with our product., Doppel's Frontend Platform team is building toward something that hasn't really been done: a frontend platform so complete that product teams no longer need to do frontend development. Designers and product engineers describe what they want; the platform - a rigorously constrained design system, agent-driven code generation, and paved-road infrastructure with permissions, telemetry, turns it into production code. We've already proven the foundation works: our modern stack (React 19, Relay, a custom UI kit with agent-enforced golden paths) is explicitly designed so AI agents generate reviewable, production-safe frontend code. Your job is to close the remaining gap between design and production. This is a small team with an ambitious, still-forming charter at a company rapidly expanding its product portfolio - you'll shape what it becomes, and every product Doppel ships will run on what you build. * Build and maintain the frontend infrastructure every product runs on: the application shell, data layer, routing, auth, and build/deploy pipeline - so product teams ship features, not frontend plumbing. * Evolve the design system from a component library into a contract: constrained, composable primitives with tokens, docs, and guardrails tight enough that generated code is correct by construction. * Build the design-to-production pipeline: the tooling, agent workflows, and review guardrails that let designers and product teams go from a design to a shipped, production-quality surface without hand-writing frontend code. * Make the platform safe by default: permissioning and packaging gates, observability, accessibility, and internationalization baked into the primitives rather than re-implemented per feature. * Own production health of the shared client: monitors, SLOs, and ownership routing so failures page the right team automatically and the platform stays trustworthy enough to build on blindly. * Package the platform for scale: a versioned component library and scaffolding that lets new apps and product surfaces spin up on the paved road from day one. * Partner closely with design and product teams as your customers - their velocity is your success metric.