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# Backend Engineer

- **Company:** NN Group
- **Location:** Vigo, Spain
- **Contract:** Permanent contract
- **Skills:** Software Quality, Distributed Systems, Python (Programming Language), Machine Learning, Workflow Management Systems, Data Processing, Enterprise Software Applications, Concurrency, Backend, Containerization, Kubernetes, Low Latency, Celery, Data Pipelines
- **Published:** September 24, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

5+ years of professional backend engineering experience, with strong expertise in Python development.
Deep understanding of distributed systems design, production-scale services, and backend architecture principles.
Strong knowledge of concurrency models, task execution frameworks, and workflow orchestration patterns.
Experience building systems that prioritize observability, reproducibility, reliability, and ease of troubleshooting.
Proven ability to collaborate effectively with technical and non-technical stakeholders to deliver practical, scalable solutions.
Strong ownership mentality with the ability to independently drive projects from concept through deployment.
Excellent problem-solving skills and attention to software quality, performance, and maintainability.
Experience with workflow orchestration tools such as Temporal, Dramatiq, Celery, or similar platforms is a plus.
Familiarity with machine learning infrastructure, data science workflows, or high-throughput data processing systems is advantageous.
Exposure to Kubernetes, containerized environments, and Python performance optimization techniques is beneficial.

## Description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Backend Engineer - Extensions based in Spain.
As a Backend Engineer - Extensions, you will play a key role in building and scaling backend systems that power advanced AI-driven capabilities for enterprise applications. Working at the intersection of engineering and data science, you will design reliable, high-performance workflows that support complex prediction use cases across multiple industries. This position offers the opportunity to tackle challenging distributed systems problems while contributing directly to production-grade solutions used by large organizations. You will collaborate closely with data scientists and research teams to transform innovative ideas into scalable backend services. The role combines deep technical ownership, architectural influence, and hands-on development in a fast-paced, impact-driven environment. If you enjoy solving complex engineering challenges and building systems that operate at scale, this is an exciting opportunity to make a meaningful contribution.
Accountabilities:
Own the end-to-end reliability, scalability, and performance of backend extension capabilities, ensuring they meet the demands of enterprise-level deployments.
Design, develop, and maintain distributed workflows that are efficient, observable, reproducible, and resilient in production environments.
Partner closely with data scientists and cross-functional stakeholders to understand technical and business requirements and translate them into robust engineering solutions.
Monitor, identify, and resolve system bottlenecks while continuously improving latency, throughput, and operational efficiency.
Contribute to architectural decisions and backend infrastructure evolution, ensuring seamless integration with broader platform services.
Develop clean, maintainable, and thoroughly tested Python code while promoting high engineering standards and best practices.
Create and maintain technical documentation, helping establish scalable development processes and knowledge-sharing practices across the team.


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