If you enjoy turning complexity into clarity, and making sure nothing falls through the cracks between business and engineering, this role is for you. What if you could help build Europe's first Super App from the inside? A single gateway where people can shop, pay, book, connect, and manage their daily lives across multiple countries, without switching between dozens of apps . Rebell is already funded (+35M EUR) and staffed with senior leaders from Alipay, Twint, Scalapay, Qonto, and Glovo. The launch is planned for late 2026, and the project is fully financed, thus no dependency on short-term fundraising. We are now hiring a Technical Product Owner to lead the definition and evolution of our merchant-side platform, dedicated to in-store and online digital payments. You will own technical delivery end-to-end, from the first business requirement to production. You will act as the bridge between business stakeholders and engineering , translating market needs into structured technical specifications, API contracts, user stories, and acceptance criteria that teams can act on without ambiguity. Build bridges between business and engineering: translate market and business requirements into structured technical specifications, API contracts, user stories, and acceptance criteria that engineering teams can act on without ambiguity. ~ Ensure end-to-end delivery: own the full product lifecycle from discovery to go-live, tracking progress across all testing and production environments, flagging blockers early, and making sure nothing falls through the cracks between teams. ~ Drive cross-functional alignment: lead and facilitate recurring governance meetings (architecture reviews, scrums, vendor reviews), bringing together Engineering, Product, Compliance, Security, and external partners around shared decisions. ~ Manage external integrations and vendors: lead merchant integration efforts, evaluate third-party vendors, prepare Go/NoGo decisions, and ensure integration quality through signature validation, idempotency handling, and acceptance testing. ~ Ensure compliance-by-design: embed regulatory and security requirements (authentication, data protection, API security) into product specifications from day one, in close collaboration with Compliance and Legal. We want an ultimately lean organization . We believe that large teams create complexity and hinder innovation. We value contribution , not seniority. English is the working language. We value people who think independently and communicate clearly, even if they're not loud. 5+ years of experience as a developer or in a technical engineering role (front-end, back-end, or full-stack): you understand how systems are built, not just specified. ~ Solid knowledge of REST APIs , webhooks, authentication, digital signatures, idempotency, and payment lifecycle. ~ Familiarity with cloud architectures (AWS) is a plus: you don't need to be an architect, but you need to follow the conversation. ~ Fluent English; Italian is a strong plus