Senior Frontend Engineer, Voice Agents

EvenUp EvenUp · Vertical AI · Toronto, ON · Hybrid · Engineering

This role is for a Senior Frontend Engineer on the Voice Agent Engineering team, focusing on building and scaling the company’s AI-powered voice platform. The engineer will design, develop, and optimize frontend systems, collaborate with cross-functional teams, and own projects from inception to deployment. While the team works with AI/ML services and builds systems that power voice agents, the core craft of this role is frontend engineering, not direct AI/ML model development.

What you'd actually do

  1. Design, develop, and optimize cutting-edge frontend systems that support growth-focused initiatives, ensuring speed, reliability, and scalability.
  2. Work closely with Product, Data, and Engineering teams to interpret growth and experimentation requirements and deliver seamless user experiences.
  3. Lead the development of frontend frameworks, libraries, and reusable UI components that enable controlled experiments, feature rollouts, and measurable business impact.
  4. Collaborate with engineers to solve challenging problems in UI/UX, performance optimization, state management, and integrations with backend and AI/ML services.
  5. Help build and reinforce the engineering culture in Toronto by sharing best practices, mentoring teammates, and maintaining a high bar for quality in a fast-paced environment.

Skills

Required

  • Extensive experience in frontend engineering
  • strong understanding of modern frontend frameworks (e.g., React, Vue, Angular)
  • Proficiency in JavaScript/TypeScript
  • ability to write clean, maintainable, production-quality code
  • Proven experience building scalable, performant, and reliable frontend systems and interfaces in high-performance environments
  • Experience thriving in startup or high-growth environments
  • Strong grasp of modern engineering practices, including test-driven development, code reviews, CI/CD, and instrumentation for analytics/experimentation
  • Familiarity with web performance optimization, accessibility, and responsive design
  • Experience with frontend tooling, build systems, and cloud-based deployments (e.g., AWS, Vercel, Netlify)
  • Excellent problem-solving and communication skills
  • Leadership potential with an interest in mentoring junior engineers and shaping best practices

Nice to have

  • Experience on growth-focused or experimentation-driven teams
  • Exposure to AI/ML-powered frontend features, real-time data visualization, or highly interactive web applications
  • Familiarity with A/B testing, analytics integrations, or experimentation platforms
  • Prior experience scaling frontend systems in rapidly growing startups

What the JD emphasized

  • AI/ML services