Principal Engineer

Naoi (pronounced : "knee"); Madrid; Presencial; EUR 70.000 - 100.000; Jornada completa

Descripción de la vacante

A dynamic tech startup in Madrid is seeking a Principal Engineer to lead the development of their product. You will be hands-on from day one, deciding how to scale the application and establishing tech standards. This is an opportunity to have a significant impact and build the dev team. Ideal candidates are senior Ruby engineers with experience in scalable app development. Competitive pay and equity are offered, along with a clear growth path to a leadership role.

Formación

• Experience with Ruby on Rails and building scalable applications.
• Comfort with Postgres and frontend technologies like Tailwind.
• Understanding of performance, security, and architecture considerations.

Responsabilidades

• Lead the engineering efforts by building and scaling the product.
• Mentor future hires and establish tech standards.
• Hands-on involvement with Rails development from day one.

Conocimientos

Ruby on Rails

Postgres

Tailwind

JavaScript

Descripción del empleo

We’re hiring our founding engineer.

Right now, our product’s being built with a top consultancy; they’ve done the heavy lifting, and it’s looking great. But we need someone to come in-house, own it, and take it to the next level.

What’s the gig?

You’ll be our

Principal Engineer

— basically the grown-up in the room when it comes to tech.

You’ll work alongside the consultancy (they’re solid), learn the system inside-out, and then run the show.

You’ll decide how we scale, what gets built, and how we build it.

Day one : hands-on Rails work. Day two and beyond : setting standards, mentoring future hires, making big calls.

Stack’s simple and solid :

Ruby on Rails | Postgres | Tailwind | Mini.js | Heroku

Why bother?

You won’t just be “joining a dev team.” You’ll be

building the dev team.

You’ll have direct impact with zero corporate nonsense.

You’ll get exposure to big clients (banks, pharma, agencies) who are already using the product.

Pay’s competitive, equity’s meaningful, and the growth path is real (Head of Eng / CTO is on the table).

What we’re after :

Rails chops. Postgres comfort. Enough frontend skills to not panic at Tailwind / JS.

Someone who’s scaled an app before — thought about performance, security, architecture.

A pragmatic builder : you ship, but you care about quality.

Bonus points if you’ve seen SaaS, HRTech, or startup chaos before.

The Bottom Line

If you’re a senior Ruby engineer and you want your fingerprints on an entire product (instead of one ticket in Jira), this is your shot.