Senior Frontend Engineer (React / Next.js / TypeScript)

We’re Agentic Private Markets, a US-based, remote-first startup building AI agents for private equity and private markets. We’re building our product from scratch and are looking for experienced freelance frontend engineers to add to our network. How it works: you’ll be contracted with us, and whenever a project or requirement comes up, we’ll reach out and work together. This is a long-term freelancing relationship, not a one-off gig. You’ll work directly with a small, senior team and the founder, with real ownership over the frontend on each project. What you’ll do Build frontend features and products from scratch (0→1), not just maintain existing screens Own frontend architecture decisions: project structure, state management, data fetching, rendering strategy, and component design Build and maintain reusable, well-documented components Keep the app fast: profile, diagnose, and fix performance bottlenecks Work closely with backend engineers and the founder to turn ideas into working product Write clean, typed, testable code and review others’ work Must-have requirements 3–6 years of professional frontend engineering experience Proven startup experience: comfortable with ambiguity, fast iteration, and wearing multiple hats Have built a product from scratch: can walk us through a project you took from zero to production Have owned frontend architecture on your own: you made the calls, not just followed them Strong React and Next.js (App Router, SSR / SSG / ISR / CSR trade-offs) Strong TypeScript (generics, utility types, conditional types) Solid understanding of state management: local state vs. global (Redux/Zustand) vs. server state (React Query) Hands-on performance optimization experience (React Profiler, Chrome DevTools, Lighthouse / Core Web Vitals, bundle analysis) Experience building shared UI component libraries / design systems Comfortable with REST APIs (GraphQL is a plus) Excellent written and spoken English Able to take up work at short notice when a project comes up Nice to have Experience with AI / LLM-powered products, real-time features (WebSockets), or data-heavy dashboards Experience with Tailwind, Storybook, and testing (Jest, Playwright, React Testing Library) Light backend exposure (Node.js) Hiring process Short screening Q&A Technical interview (Q&A on frontend fundamentals plus a small practical question) Culture-fit and critical-thinking conversation with the founder