Responsibilities
- Design, build, and maintain end-to-end systems for promotional campaigns, payment processing, and revenue-related operations.
- Develop scalable backend services and customer-facing or internal applications.
- Drive technical design and architecture decisions focused on scalability, reliability, maintainability, and performance.
- Partner with Product, Marketing, Finance, and Business Operations to translate business needs into technical solutions.
- Improve observability, resilience, and operational excellence across revenue-critical services.
- Lead projects from discovery and technical planning through implementation, rollout, and post-launch optimization.
- Contribute through coding, code reviews, testing, documentation, tooling, automation, and operational ownership.
- Mentor engineers and support knowledge sharing and engineering culture.
- Participate in the on-call rotation supporting 24/7 business operations.

Requirements
- 5+ years of professional software engineering experience.




- Strong experience building and maintaining production-grade backend systems in complex or high-growth environments.
- Hands-on experience developing modern frontend applications, ideally with React and TypeScript.
- Proficiency in Kotlin or Java, TypeScript, and SQL databases.
- Experience with distributed systems, service-oriented architectures, and event-driven systems.
- Ability to deliver end-to-end solutions from requirements and design through implementation and production support.
- Strong understanding of reliability, scalability, observability, and performance best practices.
- Ability to navigate ambiguity, solve complex problems, and drive execution in cross-functional environments.
- Strong English communication skills with technical and non-technical stakeholders.
- Experience mentoring engineers and contributing to engineering culture.
- Experience in eCommerce, marketplaces, fintech, transaction-heavy environments, promotions, pricing, incentiv

📌 Senior Full Stack Engineer (España)
🏢 CookUnity
📍 España