Senior Frontend Software Engineer (AI Receptionist)

Cresta is a company that redefines customer engagement through AI-powered voice experiences. As a Senior Frontend Software Engineer, you will develop web applications that enhance the AI Receptionist experience, collaborating with cross-functional teams to create intuitive interfaces and solve complex engineering challenges.

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
• 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