Full Stack Engineer (TypeScript · NestJS · React)

We’re looking for a systems-minded Full Stack Engineer who cares about precision, reliability, and building calm, understandable products. At Zefir, you’ll work on a high-volume messaging and automation platform used by e-commerce and operations teams to run WhatsApp, SMS, automations, analytics, and billing at scale.

You’ll work closely with product, design, and other engineers to turn complex business logic and integrations into clean, dependable user experiences. This role suits someone who enjoys working across the stack, thinking in systems, and improving products that are used daily in production—not demos.

What you’ll do

Build and maintain core product features across the stack using TypeScript, NestJS, and React
Work on integrations (Shopify, messaging providers, internal services) and complex workflows
Collaborate with product and design to implement clear, scalable UI for dashboards, automations, analytics, and billing
Write maintainable, well-structured code that holds up under real traffic and usage
Participate in architectural decisions and help improve performance, reliability, and developer experience
Ship iteratively and pragmatically, focusing on what creates real value for users

Why Zefir?

Zefir is built for reliability and scale. We operate in a space where things need to work—high-volume messaging, automation logic, billing, and attribution leave little room for guesswork. Our philosophy is simple: reduce noise, build systems that are easy to reason about, and ship what matters.

As an engineer here, you’ll have real ownership and influence. You won’t be maintaining legacy cruft or chasing hype features. You’ll work with a focused team that values clarity, good engineering judgment, and calm execution. The product is already in use, the problems are real, and the work you do will directly shape how the platform evolves.