Senior Frontend Engineer

Aircall•Town of Madrid, NY

About The Position

Aircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer-facing teams. Weâre redefining customer communications by bringing voice, SMS, WhatsApp, and AI together into one seamless workspace. Our momentum comes from a simple idea: help teams work smarter, not harder. Aircallâs AI Voice Agent automates routine calls, AI Assist streamlines post-call work, and AI Assist Pro delivers real-time guidance so people can do their best work. The result is higher revenue, faster resolutions, and teams that scale with confidence. Aircall is headquartered in Paris, our European HQ, with a strong North American presence anchored in Seattle, our North American HQ, and teams across Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. Weâve built a product customers love and a business thatâs scaling quickly, backed by world-class investors and driven by rapid AI innovation across multiple product lines. At Aircall, youâll join a company in motion. Weâre ambitious, product-driven, and execution-focused, with visible impact, fast decisions, and real growth. How we work at Aircall: Weâre customer-obsessed, data-driven, and focused on delivering meaningful outcomes. We value ownership, continuous learning, and thoughtful speed. If you thrive in a collaborative, fast-moving environment where trust and impact matter, youâll feel at home here. Within Aircall, we are launching a specialized New Product Unit to build the future of autonomous sales. We are improving the AI Orchestration Layerâa system that records and understands every customer interaction (calls, video, email, WhatsApp) to autonomously execute sales workflows: CRM updates, follow-ups, task creation, and coaching insights.Our long-term vision is to evolve this into a self-improving, agentic Sales OSâwhere specialized AI agents collaborate, coordinate, and continuously optimize the revenue process. The Role We are looking for a strong Senior Frontend Engineer who wants to go beyond traditional frontend development. This role is for someone ambitiousâsomeone who cares deeply about building things well but knows how to move fast. You understand how to balance clean architecture with pragmatism, and perfection with progress. You will be building the intelligence layer of a future autonomous Sales OS.

Requirements

7+ years of strong frontend engineering experience.
Advanced React & NextJS expertise (async, typing, architecture patterns, testing).
Solid Understanding of software architecture and clean code principles.
Tech Stack Familiarity: Experience with Tailwind CSS and monitoring tools like DataDog/Sentry.
Experience with GCP (preferred) or AWS.
You are excited about building systems that reason and act, not just respond. You thrive in a fast-paced environment where ownership is real.
Fluency in English is required; Spanish is a plus.

Responsibilities

Design & Implement: Build production-grade web services with clean architecture and strong engineering discipline using NextJS.
Architect for Scale: Utilize Domain-Driven Design (DDD) principles to build scalable frontend systems.
Seamless Integration: Connect with external SaaS systems (CRMs, dialers, meeting tools, OAuth providers) to create a unified Sales OS.
Optimize Performance: Focus on latency, cost, and reliability to ensure a seamless experience for high-performing revenue teams.
AI-Augmented Workflows: Effectively use AI coding assistants and experiment with AI-augmented development to push the boundaries of what a small, elite team can ship.