Senior Frontend Engineer

We’re looking for a Senior Frontend Engineer who cares deeply about how fast, stable, and intuitive complex AI systems feel in the browser. You’ll spend the vast majority of your time in React + TypeScript, owning frontend architecture, performance, and instrumentation. 

Our customers are high performing teams running agents and models in production. Your job is to make those workflows feel instant, predictable, and trustworthy.

• Spend most of your time building rich, performant frontend experiences in React + TypeScript (dashboards, traces, configuration flows, real-time views).
• Collaborate with backend engineers on requirements, define API contracts, implement UI, and ship with metrics, logs, and alerts wired up.
• Design and implement patterns built for scale that work under real data and load.
• Lead frontend architecture decisions around routing, data fetching, caching, and client-side error handling.
• Use analytics tools, browser performance profilers, and Core Web Vitals to measure, debug, and continuously improve frontend performance.
• Build and iterate on visualizations for model performance, agent behavior, and real-time signals by paying attention to rendering performance and perceived latency.
• Drive UI resilience: robust loading states, optimistic updates where appropriate, pagination / virtualization, retry logic, and graceful degradation.
• Provide technical leadership: reviewing designs and PRs, mentoring engineers on frontend patterns and performance, and raising the bar on UX quality in code.

• You have 5+ years of experience building user-facing web applications, including senior-level ownership of complex, high-impact projects.
• You’re fluent in React and TypeScript, and have helped shape or modernize a frontend stack.
• You have practical experience with GraphQL (schemas, queries, mutations, performance considerations) and at least one GraphQL client.
• You’ve worked on performance-sensitive or data-heavy products (dashboards, observability, dev tools, ML platforms, real-time UIs).
• You use metrics and traces to guide performance work.
• You care about UX quality such as loading states, error states, keyboard shortcuts, micro-interaction, and express that care through clean abstractions and solid architecture.
• You’re energized by education

Bonus Points, But Not Required

• Experience with data visualization libraries (D3, Vega, Plotly, visx, Recharts, etc.) and awareness of their performance tradeoffs.
• Experience with Python or Go services, especially in distributed or high-throughput environments.
• Experience setting up fine-grained product analytics and performance dashboards to track user journeys and frontend SLIs/SLOs.

The estimated annual salary for this role is between $175,000 - $200,000, plus a competitive equity package. Actual compensation is determined based on a variety of job-related factors that may include transferable work experience, skill sets, and qualifications. Total compensation also includes a comprehensive benefits package, including medical, dental, vision, a 401(k) plan, unlimited paid time off, a generous parental leave plan, and additional support for mental health and wellness.

While we are a remote-first company, we have opened offices in New York City and the San Francisco Bay Area, as an option for those in those cities who wish to work in-person. For all other employees, there is a WFH monthly stipend to pay for co-working spaces.