> Markdown version of [/jobs/ext/1926522-senior-full-stack-product-engineer-flexible-hours-ai-driven](https://www.wearedevelopers.com/jobs/ext/1926522-senior-full-stack-product-engineer-flexible-hours-ai-driven). 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). --- # Senior Full-Stack Product Engineer - Flexible Hours Ai-Driven - **Company:** Haddock - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Software as a Service, Backend, Automation Anywhere - **Published:** August 5, 2026 - **Apply:** https://www.buscojobs.com.es/senior-full-stack-product-engineer-flexible-hours-ai-driven-en-madrid-ID-365589326 ## About the Role Haddock in Barcelona is looking for experienced engineers who are interested in taking ownership of their work while developing AI workflows. You'll be responsible for designing technical solutions and building code in microservice environments, primarily on the backend. The ideal candidate has over 5 years of experience in SaaS scaling, is fluent in Spanish, and has a strong understanding of AI tooling. Flexible working hours are offered. ## Description Haddock in Barcelona is looking for experienced engineers who are interested in taking ownership of their work while developing AI workflows.You'll be responsible for designing technical solutions and building code in microservice environments, primarily on the backend.The ideal candidate has over 5 years of experience in SaaS scaling, is fluent in Spanish, and has a strong understanding of AI tooling.Flexible working hours are offered.#J-*****-Ljbffr ## Related Videos - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Beyond the Hype: Building Trustworthy and Reliable LLM Applications with Guardrails](https://www.wearedevelopers.com/videos/1594-beyond-the-hype-building-trustworthy-and-reliable-llm-applications-with-guardrails) - [Terraform for Developers](https://www.wearedevelopers.com/videos/3-terraform-for-developers) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Collaborative Intelligence: The Human & AI Partnership](https://www.wearedevelopers.com/videos/1097-collaborative-intelligence-the-human-ai-partnership) - [Fleet Management - Reinvented](https://www.wearedevelopers.com/videos/473-fleet-management-reinvented) ## Related Articles - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Spanish Business Culture and Etiquette](https://www.wearedevelopers.com/magazine/353-spanish-business-culture-and-etiquette) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Dev Digest 132 - Binging WADFlix?](https://www.wearedevelopers.com/magazine/473-dev-digest-132-binging-wadflix)