Senior Java Engineer: Scalable APIs, Kafka & Cloud

Wizeline; Barcelona; On-site; EUR 68,000 - 100,000; Full time

Benefits offered by this job

Professional development

Flexible culture

Total rewards

Job summary

Wizeline is seeking a Backend Engineer to build and scale translation services and backend systems using Java and Spring Boot in a Barcelona-based team. You will work on REST APIs, Kafka pipelines, and end-to-end translation workflows, collaborating with cross-functional teams to ensure performance, reliability, and quality.

The role emphasizes cloud infrastructure, CI/CD, automated testing, and robust production support, enabling international expansion across languages and media formats.

Qualifications

• Proficient in Java and Spring Boot for scalable RESTful APIs and microservices.
• Hands-on with cloud platforms, preferably GCP.
• Experience with event-driven architectures using Kafka or similar.
• Solid software engineering practices: Git, CI/CD, automated testing (unit/integration/e2e).
• Excellent written and spoken English communication.

Responsibilities

• Develop and enhance core translation services and backend apps using Java and Spring Boot.
• Integrate with translation providers; optimize quality, scalability, cost and latency.
• Build reliable REST APIs and Kafka-driven pipelines for high-volume content tasks.
• Implement monitoring, logging, error handling, retries, automated tests, and validation for translation workflows.
• Drive performance tuning and architecture improvements to handle growing translation volumes.
• Support production deployments, CI/CD, system monitoring, and troubleshooting for platform stability.
• Collaborate with cross-functional teams on technical design, reviews, and documentation.
• Contribute to international expansion, multiple languages, and diverse content formats across media brands.

Skills

Java

Spring Boot

Google Cloud Platform

Apache Kafka

Git

CI/CD

Automated testing

Agile methodologies

English communication

Job description

Wizeline is seeking a Backend Engineer to build and scale translation services and backend systems using Java and Spring Boot in a Barcelona-based team. You will work on REST APIs, Kafka pipelines, and end-to-end translation workflows, collaborating with cross-functional teams to ensure performance, reliability, and quality.

The role emphasizes cloud infrastructure, CI/CD, automated testing, and robust production support, enabling international expansion across languages and media formats.