We are looking to fill this role immediately and are reviewing applications daily. Expect a fast, transparent process with quick feedback.

Why join us?

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 already transforming how AI is deployed worldwide — compressing large language models by up to 95% without losing accuracy and cutting inference costs by 50–80%.
Joining us means working on cutting-edge solutions that make AI faster, greener, and more accessible — and being part of a company often described as a “quantum-AI unicorn in the making.”

We offer

- Competitive annual salary starting from €45,000, based on experience and qualifications.

- Two unique bonuses: signing bonus at incorporation and retention bonus at contract completion.

- Relocation package (if applicable).

- Fixed-term contract ending in June 2026.

- Hybrid role and flexible working hours.

- Be part of a fast-scaling Series B company at the forefront of deep tech.

- Equal pay guaranteed.

- International exposure in a multicultural, cutting-edge environment.

Required Qualifications

- 2–5 years of experience developing and maintaining backend systems in Python or Go.

- Strong understanding of RESTful API or gRPC design, versioning, and performance optimization.

- Experience with Docker and basic familiarity with Kubernetes for deploying scalable services.

- Solid understanding of relational databases (PostgreSQL/MySQL) and schema design.

- Experience integrating or automating workflows across multiple systems (data, CI/CD, ML).

- Proficiency with Git, testing frameworks, and CI/CD pipelines (GitLab, GitHub Actions).

- Experience with AWS or cloud-based deployment environments.





- A product-oriented mindset — able to turn R&D; scripts or prototypes into stable, usable APIs or microservices.

Preferred Qualifications

- Experience with ML workflow orchestration (Flyte, Airflow, MLflow, or Kubeflow).

- Exposure to LLM inference/deployment tools (vLLM, Hugging Face Hub, NVIDIA NIM, or Triton).

- Experience building or integrating benchmarking, evaluation, or data automation pipelines.

- Familiarity with message queues or event-driven architectures (Kafka, NATS, RabbitMQ).

- Understanding of observability tooling (Prometheus, Grafana, OpenTelemetry).

- Demonstrated ability to collaborate with product and design teams to define backend contracts that enable intuitive user experiences.

About Multiverse Computing

Founded in 2019, we are a well-funded, fast-growing deep-tech company with a team of 180+ employees worldwide. Recognized by CB Insights (2023 & 2025) as one of the Top 100 most promising AI companies globally, we are also the largest quantum software company in the EU.
Our flagship products address critical industry needs:

- CompactifAI → a groundbreaking compression tool for foundational AI models, reducing their size by up to 95% while maintaining accuracy, enabling portability across devices from cloud to mobile and beyond.

- Singularity → a quantum and quantum-inspired optimization platform used by blue-chip companies in finance, energy, and manufacturing to solve complex challenges with immediate performance gains.

You’ll be working alongside world-leading experts in quantum computing and AI, developing solutions that deliver real-world impact for general clients. We are committed to an inclusive, ethics-driven culture that values sustainability, diversity, and collaboration — a place where passionate people can grow and thrive. Come and join us!

📌 Backend Engineer (Fixed-term contract) (Madrid)
🏢 Empresa líder
📍 Madrid