Position :
Senior Backend Engineer
Location:
Spain (Remote).
Duration:
Permanent
Language Requirements
English proficiency: B2 level or higher
Spanish proficiency : B2 level or higher
Job Description
We are seeking an experienced
Senior Backend Engineer
to design, develop, maintain, and evolve backend services and cloud-based platforms. The role focuses on delivering high-quality, scalable, maintainable, and reliable software solutions while contributing to product evolution through strong software engineering practices.
You will work in a modern technology environment built around
containerized applications, distributed architectures, Kubernetes-based deployments, and CI/CD processes . The position also involves driving engineering excellence through automation, quality assurance, modern development tools, and AI-assisted development solutions.
Required Qualifications:
Technical Skills
At least
2 years of development experience in Go ,
OR
Strong
Java
development experience combined with
React
experience.
Hands-on experience with
Docker
and
Kubernetes .
Experience designing,



developing, and maintaining
backend services and APIs .
Experience working in
CI/CD environments , preferably using
GitHub Actions .
Preferred Qualifications
Proven experience designing and implementing automated testing strategies (unit, integration, and end-to-end).
Strong understanding of software quality practices, testing methodologies, and test automation.
Experience with continuous integration, deployment, and delivery processes.
Experience managing and consuming artifacts with tools such as
Artifactory .
Experience using
feature flags
or progressive rollout mechanisms.
Experience with
AWS
and cloud-native services.
Experience with
React .
Experience with
Java .
Knowledge of
distributed systems
and
microservices architectures .
Experience with
SQL and/or NoSQL databases .
Knowledge and application of
Domain-Driven Design (DDD)
principles.
Experience with testing frameworks/tools such as:

📌 Senior Backend Engineer (Madrid)
🏢 Hays
📍 Madrid