Senior / Staff Software Engineer

Q-tech; Madrid; Híbrido; EUR 70.000 - 90.000; Jornada completa

Descripción de la vacante

A leading AI startup in Spain is seeking a Lead IT Recruitment Consultant. The role involves designing scalable distributed systems and working within a senior engineering team focused on solving complex technical challenges. They are looking for candidates with strong backend engineering experience, preferably in Python, and a deep understanding of distributed systems. This opportunity offers a competitive salary, equity potential, and a flexible hybrid working environment with offices in central Barcelona.

Servicios

Competitive salary

Potential equity package

Flexible hybrid work model

Formación

• Strong backend engineering skills, ideally with Python.
• Deep understanding of distributed systems and concurrency.
• Experience in event-driven architectures.

Responsabilidades

• Design and scale distributed systems reliably.
• Develop complex workflows across multiple services.
• Collaborate with a small, senior engineering team.

Conocimientos

Backend engineering experience with Python or similar

Understanding of distributed systems

Experience with WebSockets and real-time systems

Problem-solving mindset

Ability to scale and operate critical systems

Descripción del empleo

Lead IT Recruitment Consultant at Q-tech

Q‑Tech is partnering with one of the most ambitious AI startups in Europe to help them grow their engineering team.

Our client is a fast‑scaling AI company backed by top‑tier Silicon Valley investors. Their product is already in production with global enterprise customers, and they are now entering a new phase of growth. To support this expansion, they are looking for Senior and Staff Backend Engineers who enjoy solving deep technical challenges and shaping complex distributed systems from the inside out.

What they are building

This is not a feature‑factory environment. It’s a place for engineers who want to push boundaries.

What you will work on

• Designing and scaling distributed systems that must operate reliably under high concurrency.
• Developing workflows that orchestrate complex behaviour across multiple services.
• Collaborating with a small, highly senior engineering team.

What they are looking for

• Strong experience in backend engineering, ideally with Python or similar languages.
• Deep understanding of distributed systems, concurrency, and event‑driven architectures.
• Experience with WebSockets, real‑time systems, or high‑throughput environments.
• Ability to design, scale, and operate critical systems.
• A mindset oriented toward solving complex technical problems rather than shipping quick fixes.

Why this role is special

• You’ll join a company already trusted by global enterprise clients.
• You’ll work on a product that blends AI, real‑time execution, and distributed systems in a way few companies attempt.
• You’ll be part of a senior, high‑impact engineering team where every decision matters.
• Competitive salary + potential equity package aligned with the company’s current stage and valuation.
• Flexible hybrid work model with offices in central Barcelona.

There are roles that feel like “just another job”, and then there are roles where you help build the technology people will talk about for years. This one belongs to the second category.

Ready to take the leap?