Senior Backend Engineer

Overview

Shalion is a data and insights-driven company that serves world-class manufacturers and brands globally. Through our Digital Shelf Optimization, Retail Media, and Food Service Aggregators solutions, we provide innovative tools for e-commerce monitoring. At Shalion, we empower brands to make smarter business decisions in eCommerce by delivering actionable data and insights on online product prices, availability, share of search, and more. We operate across 1000+ e-retailers in 60+ countries, serving industry giants such as Heineken, Lego, Danone, Nestlé, Diageo, and JDE. As a leader in data intelligence, we specialize in gathering, analyzing, and applying proprietary artificial intelligence to deliver relevant data and monitoring tools, helping our clients maximize their e-commerce performance.

The role

Senior Backend Engineer at Shalion , your responsibilities include :

• Developing and maintaining REST APIs with Kotlin / Java and the Spring framework.
• Developing and maintaining various types of microservices interfacing with multiple systems using a variety of tech stacks.
• Collaborating with frontend developers to integrate user-facing elements with server-side logic.
• Troubleshooting, debugging, and upgrading existing systems.
• Participating in code reviews and contributing to a culture of high-quality code.
• Mentoring junior developers and sharing knowledge within the team.
• Staying up-to-date with emerging technologies and industry trends.
• Contributing to the overall architecture and technical vision of the product.

Your profile

5+ years of experience as a backend engineer with strong hands-on knowledge of backend programming and patterns. Proficient in Kotlin / Java, with a focus on writing maintainable code, and good knowledge of SQL and Java interfaces (JPA / JDBC). Experience with Git, command-line, and Linux or MacOS systems. Strong debugging and profiling skills. Solid understanding of microservices architecture patterns, best practices, and experience with service-to-service communication (REST APIs, message queues, event-driven architecture). Experience with asynchronous processing and message brokers (RabbitMQ, Apache Kafka, AWS SQS). Excellent communication, teamwork, and problem-solving skills.

Ideally, you will also have

Soft Skills

Interview process

What We Offer You

Additional details

Note : This description is for Shalion's backend engineer role in Barcelona. Any additional or conflicting job titles appearing in other sections have been kept for context and may reflect broader marketing content; the core role described above is the Senior Backend Engineer.

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