Senior Frontend Developer (+ Equity) at AI-native productivity startup

Qualifications

• 4+ years of frontend engineering experience building production systems

• Deep proficiency in React and state management (use

• Product sense and design intuition, able to translate rough requirements into polished interactions

• High autonomy and low ego, able to ship, gather feedback, and iterate independently

• US work authorisation or O-1 visa eligibility; Bay Area-based or willing to relocate

• Experience with multiplayer apps (Y.js, Automerge, CRDTs)

• Building interfaces for LLM-based tools with streaming responses and progressive disclosure

• Local-first architectures (IndexedDB, service workers, sync strategies)

• Prior experience as a founding frontend engineer establishing standards

• Strong visual/design sense

• Add context when something in your background isn't obvious

• 8 more items(s)

Benefits

• Compensation & Benefits

• $180,000 – $240,000 salary depending on experience

• Meaningful early-stage equity

• Comprehensive health and dental coverage

• 401(k) included

• Considerable PTO, gym budget, and daily lunch provided

• Opportunity for early ownership and high impact in a fast-growing AI-native startup

• 4 more items(s)

Responsibilities

• As a Senior Frontend Developer, you will own the frontend of our client's core product, shipping interfaces that feel instant, intuitive, and polished even when the underlying work is complex

• You will make product and design decisions, prototype quickly, and execute without perfect specs, delivering software that not only works but feels exceptional

• Build and maintain complex frontend interfaces using TypeScript and React

• Make product and design decisions, prototyping and shipping features end-to-end

• Handle state management, performance optimisations, caching strategies, and network requests for a smooth user experience

• Implement or create designs, focusing on polished interactions, loading/empty/error states, and keyboard shortcuts

• Collaborate with backend engineers to deliver full-stack features, including database migrations and API integration

• Contribute to establishing frontend standards, reusable components, and best practices

• Strong full-stack comfort, able to own features from backend to UI

• The system understands context, curates and prioritises tasks, operates in the background, and delivers supervision-ready output

• Help unblock stalled processes or unclear feedback

• 8 more items(s)

More job highlights

Job description

This is a role that TechTree is recruiting for on behalf of one of our clients.

TechTree is an AI-driven recruitment platform working with high-growth companies.

When you apply, our AI Agent matches you not just to this role, but to other relevant opportunities across our network, so one application can unlock multiple roles.

About the Role

As a Senior Frontend Developer, you will own the fron...tend of our client's core product, shipping interfaces that feel instant, intuitive, and polished even when the underlying work is complex.

You will make product and design decisions, prototype quickly, and execute without perfect specs, delivering software that not only works but feels exceptional.

What You'll Be Doing

• Build and maintain complex frontend interfaces using TypeScript and React

• Make product and design decisions, prototyping and shipping features end-to-end

• Handle state management, performance optimisations, caching strategies, and network requests for a smooth user experience

• Implement or create designs, focusing on polished interactions, loading/empty/error states, and keyboard shortcuts

• Collaborate with backend engineers to deliver full-stack features, including database migrations and API integration

• Contribute to establishing frontend standards, reusable components, and best practices

What We're Looking For

• 4+ years of frontend engineering experience building production systems

• Deep proficiency in React and state management (useMemo, context, Zustand)

• Strong full-stack comfort, able to own features from backend to UI

• Product sense and design intuition, able to translate rough requirements into polished interactions

• High autonomy and low ego, able to ship, gather feedback, and iterate independently

• US work authorisation or O-1 visa eligibility; Bay Area-based or willing to relocate

Nice to Have

• Experience with multiplayer apps (Y.js, Automerge, CRDTs)

• Building interfaces for LLM-based tools with streaming responses and progressive disclosure

• Local-first architectures (IndexedDB, service workers, sync strategies)

• Prior experience as a founding frontend engineer establishing standards

• Strong visual/design sense

Compensation & Benefits

• $180,000 – $240,000 salary depending on experience

• Meaningful early-stage equity

• Comprehensive health and dental coverage

• 401(k) included

• Considerable PTO, gym budget, and daily lunch provided

• Opportunity for early ownership and high impact in a fast-growing AI-native startup

About the Company

Our client is a 12–14 person AI-native team in San Francisco building a personal AI assistant for knowledge workers, similar to “Cursor for knowledge work” rather than a chatbot. The system understands context, curates and prioritises tasks, operates in the background, and delivers supervision-ready output.

• Raised $30M in seed funding from Spark Capital, Felicis, and Y Combinator

• Team composed of former founders, CTOs, and high-agency builders

• High ownership, fast iteration, and impact-driven culture

What is TechTree?

TechTree combines AI agents with a human support team to give candidates a better, more transparent hiring experience.

Our AI Agent gets to know your background, experience, and what you're optimising for.

It continuously matches you to live roles across our network where there's genuine alignment, not just keyword overlap.

Our Human Team is there to support you through the process:

• Answer questions about roles, process, and next steps

• Add context when something in your background isn't obvious

• Help unblock stalled processes or unclear feedback

• Make sure you're not left guessing, ghosted, or wasting time

We only post real jobs.

Every role on TechTree is a live, active hire.

If you apply: you'll be considered for this role, you may also be matched to other relevant roles, and if there's no fit, we won't spam you.

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