Senior Frontend Engineer

EngineeringSan Francisco, CAFull-time
$200K - $2M+ total comp
$100K - $250K base0.10% - 2.00% equity
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About the role

We're looking for a Senior Frontend Engineer to build interfaces for cutting-edge multimodal AI systems in sales. You'll create the dashboards and tools that let customers deploy, monitor, and optimize AI agents handling millions of real voice conversations per day. This is a high-impact role at the intersection of frontend engineering and AI systems. You'll build real-time monitoring interfaces for voice AI interactions, create tools for prompt engineering and model fine-tuning, and develop safety dashboards that detect unexpected AI behaviors. You'll work directly with customers worth millions in ARR, understanding how they interact with our AI systems. The ideal candidate has deep expertise in React and TypeScript, experience with real-time data visualization, and understanding of AI/ML concepts. You'll thrive in our high-intensity environment where we're building the future of conversational AI interfaces.

What you'll do

  • Build real-time monitoring interfaces for multimodal AI voice interactions
  • Create dashboards showing AI safety metrics and unexpected behavior detection
  • Develop tools for prompt engineering, RAG configuration, and model fine-tuning
  • Implement visualization for voice AI performance (latency, ASR accuracy, conversation quality)
  • Build interfaces for AI alignment and safety framework configuration
  • Optimize frontend to handle real-time data from millions of concurrent AI calls
  • Create debugging tools for AI conversation flows and model behaviors
  • Work with WebRTC to implement in-browser voice AI testing capabilities
  • Own customer relationships and understand how they interact with AI systems

What we're looking for

  • Expert-level proficiency in React, TypeScript, and modern JavaScript
  • Experience building interfaces for LLM or voice AI systems
  • Strong background in real-time data visualization and monitoring dashboards
  • Understanding of AI/ML concepts (prompt engineering, RAG, model evaluation)
  • Experience with WebRTC or real-time communication interfaces
  • Track record of building production systems handling massive scale
  • Excellence in cross-functional communication with AI/ML teams
  • Ability to work 5+ days per week from our San Francisco office

Nice to have

  • 5+ years of frontend development experience
  • 2+ years working on AI/ML interfaces
  • Experience with data visualization libraries (D3.js, Recharts)
  • Background in building developer tools or B2B SaaS products
  • Experience with monorepo architectures and build systems
  • Contributions to open-source projects

Work Environment

As an early-stage company building at the frontier of AI, we work with high intensity and commitment. While schedules can vary by role and team, many weeks will demand extra focus, flexibility, and time—particularly during major launches and high-impact sprints. We're seeking those who are aligned to and able to commit to that expectation, which includes 5 days per week in our San Francisco office.

This isn't for everyone, and that's okay. We're looking for people who thrive in high-stakes environments, who find energy in solving hard problems alongside exceptional teammates, and who want their work to have immediate, measurable impact.

Own real customer relationships + meaningful equity

At Takeoff, every engineer owns relationships directly with customers. You won't be hidden away coding in isolation. You'll join customer calls, understand their challenges firsthand, and see the immediate impact of your work. Each engineer is responsible for customers generating millions in revenue. When you ship a feature, you'll hear directly from the sales teams whose lives you've transformed.

You'll also own a meaningful piece of the company. With 0.10% to 2.00% equity grants per teammate, early employees will see a substantial share of the returns as we scale. We believe in real ownership that reflects your impact on our growth.

Why join Takeoff?

  • Direct revenue impact: Own customer accounts worth millions in ARR
  • Customer exposure: Join calls, understand problems, ship solutions that matter
  • Cutting-edge tech: Work with the latest in AI, voice synthesis, and real-time systems
  • Growth: Join early and grow with us as we scale from thousands to millions of calls
  • Team: Work with ex-FAANG engineers who've built systems at scale

Ready to build the future of sales?

We'd love to hear from you. Send us your resume and a note about why you're excited about Takeoff.

Apply for this role