Senior Frontend Software Engineer (AI Receptionist)

Cresta AI Receptionist is redefining how businesses engage with customers by delivering natural, intelligent, and reliable AI-powered voice experiences. Our AI Receptionist answers calls, understands customer intent, completes tasks, schedules appointments, routes conversations, and seamlessly hands off to human agents when needed.

As a Senior Software Engineer, Frontend, you'll help build the web applications that power the AI Receptionist experience for enterprise customers. You'll work closely with Product, Design, AI/ML, and Platform teams to create intuitive interfaces for configuring AI agents, managing deployments, monitoring live conversations, analyzing performance, and continuously improving customer experiences.

Responsibilities

• Partner with Product Managers, Designers, and Engineers to define and deliver new AI Receptionist capabilities.
• Design and build modern, responsive, and highly interactive web applications using React and TypeScript.
• Create intuitive user experiences for configuring conversational AI, managing knowledge sources, testing AI behavior, and deploying voice agents.
• Build reusable UI components and frontend infrastructure that improve consistency, scalability, and engineering velocity.
• Integrate frontend applications with backend services using REST APIs, WebSockets, and real-time streaming technologies.
• Collaborate closely with AI and ML engineers to surface LLM-powered capabilities through intuitive user experiences.
• Optimize application performance, accessibility, reliability, and responsiveness across enterprise-scale deployments.
• Drive frontend architecture decisions and establish engineering best practices.
• Improve developer productivity through testing, CI/CD, observability, monitoring, and automation.
• Mentor engineers through technical leadership, design reviews, and collaborative problem solving.

Requirements

• 5+ years of professional software engineering experience with a strong focus on frontend development.
• Deep expertise with modern frontend technologies including React, TypeScript, JavaScript, HTML, and CSS.
• Experience building complex, production-scale web applications with exceptional user experiences.
• Strong understanding of frontend architecture, component design, state management, and modern build systems.
• Experience integrating with backend services using REST APIs, GraphQL, WebSockets, or streaming protocols.
• Familiarity with frontend tooling including Vite, Webpack, Node.js, and modern testing frameworks.
• Strong understanding of application performance optimization, observability, and debugging.
• Experience collaborating closely with Product and Design teams to build polished enterprise applications.
• Ability to influence technical direction while contributing high-quality production code.
• Excellent communication skills and the ability to thrive in a fast-paced, collaborative environment.

Nice to Have

• Experience building AI-powered or Generative AI applications.
• Experience working with Large Language Models (LLMs) and AI agent platforms.
• Experience building products for conversational AI, voice technology, or contact center software.
• Experience with real-time communication technologies.
• Experience with Go or other backend technologies.
• Experience building cloud-native distributed systems.

Benefits

• Medical, dental, and vision plans
• Paid parental leave
• Monthly Health & Wellness allowance
• Work from home office stipend
• Lunch reimbursement for in-office employees
• PTO: 3 weeks in Canada