Senior Full-Stack Engineer for AI-Powered SaaS

Noloco; Barcelona; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Health Insurance

Hybrid or in-office work

Competitive salary and equity

5 weeks paid vacation

Remote-friendly company policy

Job summary

Noloco is seeking a Senior Full Stack Software Engineer to own features across frontend and backend, building AI-powered tools and scalable APIs. You’ll work on GraphQL, Node.js, React, and data models, delivering delightful UX and robust performance.

In a hybrid setup with Barcelona as a base, you’ll collaborate across product, design, growth, and engineering, shaping the future of our AI Co-Builder and our SaaS platform.

Qualifications

• Significant experience (4 years) as a full stack engineer on complex web apps.
• Strong JavaScript/TypeScript skills across Node.js and React.js.
• Experience designing clean, scalable APIs (GraphQL is a plus).
• Experience building AI-powered agents, workflows, and UIs.
• Understanding of frontend performance, state management, and design systems.
• Product mindset with user-first thinking; comfortable shaping problems.

Responsibilities

• Build end-to-end features across backend services, GraphQL APIs, and React-based UI.
• Advance Noloco's AI Co-Builder using frontier-model improvements.
• Design reusable React components and design systems for the app builder.
• Scale backend systems and APIs to meet growing customer demand.
• Collaborate with Product and Design to deliver polished user experiences.
• Improve analytics, observability, monitoring, and alerting.
• Mentor engineers and drive technical discussions to raise the bar.

Skills

JavaScript/TypeScript

Node.js

React.js

GraphQL

APIs

AI/ML concepts

Frontend performance

Startup experience

Product mindset

Tools

Postgres

MongoDB

Redis

AWS

GitHub

Grafana

Sentry

Job description

Noloco is seeking a Senior Full Stack Software Engineer to own features across frontend and backend, building AI-powered tools and scalable APIs. You’ll work on GraphQL, Node.js, React, and data models, delivering delightful UX and robust performance.

In a hybrid setup with Barcelona as a base, you’ll collaborate across product, design, growth, and engineering, shaping the future of our AI Co-Builder and our SaaS platform.