AI Product Focused - Senior Fullstack - Rails Engineer (Europe)

Yuma AI (YC W23); Barcelona; Presencial; Jornada completa

Descripción de la vacante

A technology company in AI orchestration in Barcelona is seeking a Senior Fullstack Engineer with strong expertise in Ruby on Rails and a passion for delivering high-quality products. You will be part of a small, intense team focused on rapid iterations and AI applications. The ideal candidate has experience with large Rails applications and familiarity with LLMs. This is a full-time position with a commitment to excellence.

Formación

• Experience leading large Rails applications.
• Pragmatic approach to product development.
• Familiarity with handling LLM outputs.

Responsabilidades

• Drive product iterations and A/B testing.
• Manage the AI Agents pipeline.
• Optimize performance of applications.

Conocimientos

Rails applications leadership

Backend project experience

LLM experience

Frontend work familiarity

Herramientas

Ruby on Rails

PostgreSQL

Redis

Next.js

React

Descripción del empleo

Overview

AI Product Focused - Senior Fullstack - Rails Engineer (Europe)

This range is provided by Yuma AI (YC W23). Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range
1.00 / yr - $100,000.00 / yr

About Yuma AI

Yuma is building a complete orchestration platform that deploys autonomous AI agents dedicated to customer support in e-commerce. We are one of the leaders in this space and we offer one of the most advanced platforms to date, supporting over 100 paying customers. Our agents replicate human capabilities by taking actions and retrieving information from external services as needed.

Our top merchants automate over 80% of their support tickets through Yuma. Yuma was founded by Guillaume Luccisano, a 3rd time YC founder, and now boasts a team of 20 highly dedicated, talented people driven to deliver the best value to our customers through AI.

Role Overview

We remain a small team of 5 engineers, but we are intense and we move very quickly! Fast iteration is key. In the past 2 years since Yuma’s founding, we’ve built a lot, but there is still much more to do. We operate at startup speed and handle everything: product iterations, A / B testing, LLM research, AI Agents pipeline, new feature development, performance optimizations, and more. We are intensely focused on delivering value to our users and on product excellence. That is the only thing that matters.

Our backend is a standard Ruby on Rails API powered by PostgreSQL, Redis, and Sidekiq. Our frontend uses Next.js and React. We already handle a significant load, ingesting and processing millions of support tickets per month and millions of e-commerce data points per day.

We are definitely not a 9-to-5 team, and we are heavily committed to delivering excellence throughout our craft.

The Ideal You

• You have led and built multiple large Rails applications, and you always strive for excellence. You are pragmatic, making the right trade-offs that favor speed of iteration while maintaining high product quality.
• You are driven by delivering the best experience and value to your users. You might have a preference for working on backend projects, but you aren’t afraid of frontend work. Rails has no secrets for you.
• Recent experience playing with LLMs is now mandatory, and you have already adopted AI in your day-to-day tasks. Building with LLMs and managing non-deterministic output is not scary to you.
• If you are relentless, deeply caring about delivering value & ownership, and looking to join an early, hard-working team, we want you. We are seeking someone who is looking to embrace a new challenge and commit to it 100%.
• Your diploma doesn’t matter to us; we only care about your skills, your sense of ownership, and drive.
• Don’t be shy, apply!

Culture

Please, if you are considering applying, first read our culture page :

Employment details

• Seniority level: Mid-Senior level
• Employment type: Full-time
• Job function: Engineering and Information Technology
• Industries: Technology, Information and Internet

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