Summary: Seeking an experienced Senior Backend Developer to join an international team building award-winning AI products, focusing on high-quality code and continuous learning. Highlights: 1. Opportunity to work on exciting, cutting-edge AI products and projects. 2. Friendly, international team with diverse technical backgrounds. 3. Career growth opportunities to further develop skills and expertise. **Job description:** -------------------- We are looking for an experienced Senior Backend Developer (f/m/x) who takes pride in writing high\-quality code, enjoys learning and sharing knowledge, and delivers reliable solutions on time. You will join an international, cross\-functional team of experienced software engineers and ML researchers based in Barcelona and Vienna. Together, we build the next generation of award\-winning products powered by the latest AI and agentic approaches. Our team embraces the newest advances in AI\-assisted coding to increase speed and productivity – while maintaining high standards for clean architecture, testing, and production\-grade code. **Your Tasks:** --------------- * Develop and maintain dockerized Python\-based web services. * Collaborate with the system architect to evolve and improve our overall architecture. * Own features end\-to\-end and drive their implementation to ensure on\-time delivery. * Design, build, and maintain well\-tested web APIs following modern best practices. * Support researchers and ML engineers in integrating our latest AI technologies into production systems. **Your Profile:** ----------------- * At least 5 years of experience building and delivering backend applications and services (e.g., RESTful APIs). * Strong professional experience with Python, including writing clean, “Pythonic” code and applying best practices in production systems. * Solid understanding of software design principles for distributed systems. * Good communication skills in English (Spanish or German are a plus). * Ability to work effectively in an agile, multinational, and cross\-functional environment. * Keen to embrace the newest advances in AI\-assisted coding. **What we offer:** ------------------ * The opportunity to work on exciting, cutting\-edge AI products and projects. * A friendly, international team with diverse technical backgrounds. * Flexible working hours and home office options. * A fair and competitive salary that reflects your experience and impact. * Career growth opportunities to further develop your skills and expertise. * The opportunity to participate in the company’s growth through our Employee Stock Option Program (ESOP). * Private health and dental insurance. * Six paid Fridays off during the summer. * Team events, plus free snacks and drinks. **Salary:** ----------- We offer a salary range of €60,000–€75,000 per year, depending on qualifications and experience. **About us:** ------------- Partium builds an AI\-powered Parts Intelligence platform that helps maintenance, supply chain, and after\-sales teams find spare parts in seconds – even with incomplete or inconsistent data. Beyond search, we help companies optimize parts data by detecting duplicates, enriching master data, and improving inventory and procurement decisions. Partium is a globally active company with subsidiaries in Austria, Germany, Spain, Canada, and the United States. Learn more about our culture and what it’s like to work with us at: https://www.partium.io/work\-with\-us **Our office:** --------------- * Located in Barcelona, next to Provença FGC station and just two blocks from Diagonal metro station. * A bright, sunny, and quiet office space in a central location. * Flexible hybrid work policy (remote and office). * Optional post\-lunch foosball matches — join if you feel like it. * Indefinite * Full time * €60,000 \- €75,000 * Hybrid (08008, Barcelona, Barcelona, Spain) * Tech