Senior Full-Stack AI Engineer — Valencia Hybrid

Hubblr; Madrid; Hybrid; EUR 70,000 - 100,000; Full time

Job summary

HUBBLR seeks a seasoned Software Product Engineer with a backend orientation who can also manage frontend tasks. You will own delivery, contribute to product strategy, and help shape scalable software for client projects.

The role is hybrid: 2–3 days in the Valencia office, with travel to Germany and Spain as needed. Strong English communication and 4+ years of experience are required to thrive here.

Qualifications

• Experience in backend technologies including Golang and Node.js (NestJS).
• Experience with PHP or Python is a plus.
• Proficiency in modern web tech: Vue.js or React.js.
• Familiarity with Agile software development methods and E2E testing.
• Experience with LLM-based tooling (Claude/Gemini) is desirable.
• Strong communication and English language skills.

Responsibilities

• Provide hands-on backend engineering and occasional frontend leadership.
• Own delivery end-to-end and drive architectural decisions.
• Collaborate with cross-functional teams across multiple offices.
• Engage with clients, CTOs, and stakeholders to report progress.
• Help build scalable software products from early stages.

Skills

Backend focus

Frontend ownership

English fluency

Tools

NestJS

Vue.js

React.js

TypeScript

TailwindCSS

CI/CD

GraphQL

REST API

Golang

Node.js

PHP

Python

Job description

HUBBLR seeks a seasoned Software Product Engineer with a backend orientation who can also manage frontend tasks. You will own delivery, contribute to product strategy, and help shape scalable software for client projects.

The role is hybrid: 2–3 days in the Valencia office, with travel to Germany and Spain as needed. Strong English communication and 4+ years of experience are required to thrive here.