Machine Learning Engineer (Product) (9-month contract with bonus incenti...

Overview

Machine Learning Engineer (Product) — 9-month contract with bonus incentives. Location : Madrid, Barcelona. We are hiring immediately and reviewing applications daily for a fast, transparent process with quick feedback.

We are a European deep-tech leader in quantum and AI, backed by major global strategic investors and strong EU support. Our groundbreaking technology is transforming how AI is deployed worldwide, including compression of large language models by up to 95% without loss of accuracy and reductions in inference costs by 50–80%.

Responsibilities

• Build data and model pipelines end-to-end : create, source, augment, and validate datasets; stand up training, fine-tuning, and evaluation flows; and ship models that meet product and customer requirements.
• Design rigorous evaluation frameworks to verify task competence and alignment; implement statistical testing, reliability checks, and continuous evaluation.
• Scale training and inference : utilize distributed compute, optimize throughput / latency, and identify opportunities for algorithmic or systems-level speedups.
• Improve models post-training : apply SFT and preference-based or reinforcement learning methods to enhance helpfulness, safety, and reasoning.
• Optimize and specialize models : apply compression techniques to meet performance and footprint targets.
• Collaborate across research and engineering : partner with ML engineers, researchers, and software engineers on data curation, evaluation design, training runs, model serving, and observability.
• Contribute to our shared codebase : write clean, well-tested Python; document decisions and artifacts; uphold engineering standards.

Required Qualifications

Preferred Qualifications

Preferred focus areas

About Multiverse Computing

Founded in 2019, we are a well-funded, fast-growing deep-tech company with a global team. Recognized by CB Insights (2023 & 2025) as one of the Top 100 most promising AI companies globally, we are the largest quantum software company in the EU.

Our flagship products address critical industry needs :

You’ll be working alongside world-leading experts in quantum computing and AI, delivering real-world impact for global clients. We are committed to an inclusive, ethics-driven culture that values sustainability, diversity, and collaboration.

As an equal opportunity employer, Multiverse Computing is committed to building an inclusive workplace. The company welcomes people from all backgrounds, including age, citizenship, ethnic and racial origins, gender identities, individuals with disabilities, marital status, religions and ideologies, and sexual orientations to apply.

Job Details

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