Senior Backend Engineer

About the Position

Lead backend architecture, AI-powered automation, and a growing engineering team at Shalion - building products that help global brands make smarter e-commerce decisions.

About the Company

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, 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.

Responsibilities

• Lead backend development across our products, owning the engineering roadmap for new features.
• Decide on and evolve the technology stack for these products.
• Manage the existing backend engineer, staying hands on in the work, with the team potentially growing further down the line.
• Lead the team in developing new technical solutions for products still on the roadmap, not only in improving what already exists.
• Bring AI and automation into the products themselves, finding where workflows can be automated to speed up delivery.
• Set up engineering frameworks, standards, and processes across the product portfolio, since none exist in a unified way today.
• Stay close to the product stakeholders directly, understand what they need, and translate that into a technical roadmap and new features, not just a delivery plan.
• Stay hands on. This is a building role.

Requirements

• 5+ years of hands-on experience in backend engineering, ideally across multiple products, including at least 1 year in a management capacity.
• Today our stack includes Kotlin, Python, React, Langgraph, AWS, Snowflake though deciding where we go next is part of the job.
• Comfortable making and owning technology stack decisions.
• Experience building engineering processes and team structure from the ground up.
• Genuine interest in applying AI and automation directly to product development.
• Professional fluency in English and Spanish, both required.

Nice to Have

• Experience scaling an engineering team from a small base.
• Prior experience working across several products at once, rather than owning a single one end to end.
• Experience with AI-powered workflow automation.
• Frontend knowledge to be able to work with those teams and be autonomous.

We Offer

• 🌍 An international team – Work with colleagues from 10+ nationalities.
• 🚀 A dynamic and innovative environment – Be part of a high-performing team.
• 🏢 Hybrid work model – 3 days in-office, 2 days remote.
• 💡 Impactful work – Contribute to a challenging and innovative project.
• 🎟 Flexible benefits – allocate part of your gross salary (pre-tax) to meal vouchers, transport allowance, and private healthcare at a preferential rate.
• 🍏 Office perks – Fresh fruit and specialty coffee daily.
• 📄 Contract: Permanent
• 💰 Salary range: from 50,000€ to 60,000€ gross/yearly, according to experience and seniority.
• 📍 Great location – Office in Barcelona’s Sarrià-Sant Gervasi district.

Shalion Data Services Limited is an equal-opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.