Staff AI Frontend Engineer

Ersilia; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Ersilia is hiring a Staff AI Frontend Engineer who sits at the intersection of product design and frontend engineering. You are an engineer first, with exceptional design sensibility that elevates every build, defining the look and feel of AI-native workflows.

You will own real-time WebRTC streaming for the companion agent, generative dashboards, and agentic chat, shipping multiple features daily with AI assistance, in a fast-growing startup environment.

Qualifications

• 6+ years shipping production-grade frontend products.
• Mastery of React, Next.js, TypeScript and Tailwind.
• Experience with AI-native development tools and integrations.
• User-centric design sensibility paired with engineering excellence.
• High autonomy with ownership in fast-moving startups.
• Willingness to relocate to SF and work in-person 5 days a week.

Responsibilities

• Architect scalable frontend systems, reusable component libraries, and patterns for state management and API integration.
• Own and ship primary user-facing features end-to-end from components to production polish.
• Bridge AI capabilities with elegant UX, exposing strong functionality while hiding complexity.
• Build real-time WebRTC streaming for companion agent, generative dashboards, and agentic chat.
• Prototype design concepts with AI tools, delivering working demos across teams.
• Shape how the team scales code review and SDLC with AI-encoded architecture thinking.

Skills

6+ years experience

Frontend architecture

AI tooling integration

Customer communication

Relocation to SF

Tools

React

Next.js

TypeScript

Tailwind

Job description

About the company

Tldr on us: Series B, $91M raised, 7x growth last year.

Digital Transformation gave rise to a $600B consulting Industry. AI Transformation will be 10x bigger and will be delivered through agents. We built that.

Our AI discovers how work actually happens across every team and application, structures it into a living Context Graph, and improves it continuously. ServiceNow mapped 900+ processes in 9 days. DoorDash captured 3,800+ finance operations in 14 weeks. That's not a project. That's compounding intelligence. OpenAI, Google, DoorDash, and Stripe use our platform to transform how they transform. We shipped GPT-4 document chat within 12 hours of OpenAI's API launch. We move fast, reward agency, and care deeply about our customers, our team, and our mission.

About the Role

We’re hiring a Staff AI Frontend Engineer who sits at the intersection of product design and frontend engineering. You are an engineer first, but with exceptional design sensibility that elevates everything you build.

You will define and implement the look and feel of AI-native workflows, ensuring complex enterprise tools feel as intuitive as the best consumer apps.

The product includes a real-time, WebRTC-powered companion agent that follows users across their screen, generative dashboards that visualize complex enterprise context graphs, agentic chat that operates the web application directly, and a fundamentally new UI paradigm built around generative AI.

You will ship at AI speeds, work directly with a tight founding team, and help define the future of frontend SDLC.

What You'll Own

• Architect scalable frontend systems: design reusable component libraries, establish patterns for state management and API integration, optimize bundle sizes, ensure the platform performs beautifully at scale.
• Own and ship the primary user-facing features users interact with daily, end-to-end from React components through API integration to production polish.
• Bridge AI capabilities with elegant user experiences: partner with product and backend engineers to expose powerful functionality while hiding technical complexity.
• Build complex frontend systems, including real-time WebRTC streaming for the companion agent, generative dashboards, and agentic chat that operates the product itself.
• Use AI tools to rapidly prototype design concepts in code, bridging gaps between teams with working demos instead of static mocks.
• Help define how the team scales code review and SDLC with agents that encode your architectural thinking.

Requirements

Must-Have

• 6+ years shipping production-grade products. Senior to Staff level.
• Mastery of modern web technologies: React, Next.js, TypeScript, Tailwind. You understand the performance consequences of architectural decisions and ship code that's elegant and performant.
• AI-native developer. You wield Cursor, Claude Code, v0.dev, Lovable, and comparable tools as extensions of your craft. You ship multiple features per day with AI assistance.
• Engineer first, designer by instinct. You discuss Server vs Client Components as fluently as you critique spacing and visual hierarchy.
• High agency. You've pushed yourself outside structured environments as a founder, founding engineer, or with significant scope ownership at a real startup.
• On the bleeding edge of AI tooling. You can articulate what changed in your stack in the last three months.
• Comfortable talking to customers and sales. You shape product through action, not waiting for permission.
• Based in SF or willing to relocate immediately. In-person 5 days a week downtown SF.

Nice-to-Have

• Prior founder or founding engineer experience
• Real-time WebRTC streaming or video pipeline experience
• Voice AI product experience
• Generative UI or generative dashboard work
• Python backend comfort for occasional cross-stack work
• No CS or Engineering degree required; portfolio, GitHub, and shipping track record matter more

* Visa: H-1B transfers accepted; STEM OPT accepted if 2+ years remaining; O-1 not accepted as a candidate's only path