Middle Front-End Developer (Typescript, React/Next)

* Please note this position is for Kannact, a company we're involved with, not for MustardHub.

Kannact is a health coaching service dedicated to helping people with chronic conditions. Our platform consists of a CRM that the coaches use, a patient portal, an app that runs the landing pages, and a booking portal. We're a very well established company primarily located in Spain.

This position is for an independent and autonomous middle-level Front End engineer well-versed in TypeScript + React (Next is a nice bonus).

You will:

• Take ownership of various frontend applications (CRM, Patient Portal, Landing Site, Booking App).
• Work independently and figure things out. You won't have to architect any new applications, but you'll need to be supporting the existing ones.
• Eventually, potentially contribute to backend tasks.
• You will work alongside 3 other developers. You will report to the VP Engineering located in Spain and you'll be working primarily Spain hours; every once in a while you'll have to take meetings with our team members in the US.
• Your English is great. You can hold a conversation with a native speaker, or a non-native English speaker.

Our Tech Stack:

• React, React Query (REST APIs)
• SASS, BEM, Prime React
• Next.js is used for our marketing site (both Pages Router and App Router)
• State Management, Forms (React Hook Forms)
• Build Tools/Monorepos (Turborepo awareness is a plus)
• Validation Libraries (Zod awareness is a plus)
• Testing: Experience or willingness to learn Playwright (E2E)
• Interacting with APIs (REST, potentially SDKs like Twilio).
• Understanding of SSR and SSG concepts.
• Experience with Headless CMS (like Sanity.io) is a plus.

We're primarily located in Spain with a few team members in the US. You'll be primarily working Spain work hours.