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# Backend Engineer

- **Company:** Compactifai
- **Location:** Madrid, Spain
- **Salary:** €45,000.0
- **Contract:** Temporary contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Airflow, Amazon Web Services, Cloud Computing, Continuous Integration, Relational Databases, Github, Python (Programming Language), PostgreSQL, MySQL, Performance Tuning, Queueing Systems, RabbitMQ, Prometheus, Systems Integration, Management of Software Versions, Workflow Management Systems, Datadog, Large Language Models, Grafana, Backend, Gitlab, Git, Event Driven Architecture, Kubernetes, Deployment Automation, HuggingFace, Apache Kafka, Machine Learning Operations, Nim (Programming Language), Restful APIs, Docker, Microservices
- **Published:** July 22, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

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., 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.

## Description

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."


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