Backend engineer for a commerce platform

At Q-tech, we collaborate with one of Europe’s leading streaming and entertainment groups, present in 11 countries and home to top-tier live sports such as Formula 1 and premier European football, as well as original series, films and live channels. Every sign-up, checkout, payment and subscription runs through their Commerce platform, which is the moment a viewer becomes a customer. They are opening a new technical leadership role in their Barcelona hub. They are looking for a hands-on Senior or Lead Engineer who loves writing code and is just as eager to share knowledge, raise the technical bar and lead initiatives that affect the whole company.

• Build scalable, resilient backend services in Node.js and TypeScript (with some Rust) on AWS.
• Drive the evolution from microservices and legacy components to an event-driven, serverless architecture (Lambda, DynamoDB, SQS, SNS) while keeping complexity under control.
• Design integration strategies with third-party payment providers and commercial platforms.
• Write real production code, including outside your own domain when another team needs support.
• Help define the technical direction of the Commerce platform in line with the long-term product vision.
• Act as the bridge between teams on cross-cutting problems, and help drive the engineering guilds and tech communities.
• Lead AI adoption in engineering: test what works (Copilot, spec-driven design, AI-assisted testing), share the trade-offs openly, and help other teams adopt it.
• Challenge the “why” before the “how”: make sure the teams are solving the right problem.
• Mentor engineers and favour solid solutions over trendy ones. Help teams reach good decisions instead of imposing them.

• Solid experience as a Senior Engineer or Tech Lead, with a track record of influencing beyond your own team.
• Strong background building customer-facing web services with JavaScript, TypeScript and Node.js.
• Experience designing scalable cloud services on AWS, ideally serverless and event-driven.
• Experience with high-traffic, high-transaction consumer products.
• Ability to drive technical initiatives without formal authority.
• Hands-on experience introducing AI-assisted engineering practices.
• Experience modernising or migrating complex systems.
• Fluent English (working language).

• Permanent contract and 30 days of paid holiday
• Hybrid and flexible: 2 days a week in the Barcelona office.
• Private health insurance, a pension plan, flexible compensation and meal vouchers.