> Markdown version of [/jobs/ext/3089442-product-engineer-backend](https://www.wearedevelopers.com/jobs/ext/3089442-product-engineer-backend). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Product Engineer (Backend) - **Company:** Número De - **Location:** Barcelona, Spain (Remote available) - **Salary:** €50,000.0 - €90,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), A/B Testing, Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Software as a Service, Software Quality, Cursor (Graphical User Interface Elements), Programming Tools, PostgreSQL, Enterprise Messaging Systems, RabbitMQ, Mixpanel, Software Engineering, Systems Integration, Web Application Frameworks, GitHub Copilot, Grafana, Backend, Kotlin, Kubernetes, Apache Kafka, Front End Software Development - **Published:** September 26, 2026 - **Apply:** https://www.adzuna.es/contact-us.html ## About the Role + Professional experience in backend software engineering, with openness to candidates ranging from a few years of experience to senior-level engineers. + Strong hands-on experience with Kotlin or Java and a web framework such as Micronaut or Spring. + Experience developing SaaS products, ideally in an Agile or cross-functional product environment. + Strong backend engineering fundamentals combined with an interest in contributing outside the backend stack when a product feature requires it. + Familiarity with AI-powered coding assistants such as Cursor, Claude Code, GitHub Copilot, or similar tools, or a strong willingness to adopt them. + A product-minded approach, with the ability to understand user problems, evaluate potential solutions, and take ownership through delivery and rollout. + Strong curiosity, adaptability, communication skills, and engineering judgment. + Ability to collaborate effectively with product managers, designers, and engineers across multiple technical disciplines. + Experience working directly from design mockups or prototypes is a plus. + Knowledge of instrumentation and experimentation tools or practices, such as A/B testing, Grafana, or Mixpanel, is advantageous. + Experience with Kubernetes and Helm is a plus. + Practical experience with PostgreSQL is beneficial. + Familiarity with messaging technologies such as RabbitMQ or Apache Kafka is advantageous. ## Description This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a (Senior) Product Engineer (Backend) (m/f/d) based in Spain. Join a product-focused engineering team building AI-powered experiences for frontline employees across retail, manufacturing, and logistics. You will take deep ownership of backend systems while staying connected to the complete user journey and product experience. The role combines backend engineering, SaaS development, product thinking, and practical use of AI-powered development tools. You will work closely with product managers, designers, and engineers across backend, frontend, mobile, and AI. Rather than simply implementing predefined tickets, you will help understand user problems, shape solutions, prototype ideas, and measure their impact. The environment values curiosity, adaptability, engineering judgment, and continuous learning as software development evolves through AI. You will have the support and autonomy to expand your technical scope while becoming an increasingly product-minded, AI-enabled engineer. Accountabilities: + Design, develop, and maintain reliable and scalable backend services for SaaS products. + Build APIs, data models, integrations, and other backend capabilities using Kotlin or Java and modern web frameworks. + Take ownership of features from problem discovery and prototyping through development, rollout, and impact measurement. + Collaborate closely with product managers, designers, and engineers across backend, frontend, mobile, and AI. + Extend beyond backend development when needed, contributing to web, mobile, infrastructure, or other areas to deliver complete product experiences. + Use AI coding assistants and modern development tools to explore unfamiliar codebases, accelerate development, and make well-structured cross-stack changes. + Focus on user outcomes rather than simply completing predefined technical tickets, using conversations, prototypes, instrumentation, and experimentation to validate ideas. + Contribute to technical decisions, engineering practices, code quality, and scalable product architecture. + Participate in an evolving engineering culture focused on end-to-end ownership, rapid experimentation, and continuous improvement. ## Related Videos - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Monitoring as Code - Managing your dashboards at scale](https://www.wearedevelopers.com/videos/753-monitoring-as-code-managing-your-dashboards-at-scale) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Coffee with Developers](https://www.wearedevelopers.com/videos/341-coffee-with-developers) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Back(end) to the Future: Embracing the continuous Evolution of Infrastructure and Code](https://www.wearedevelopers.com/videos/440-back-end-to-the-future-embracing-the-continuous-evolution-of-infrastructure-and-code) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market)