Senior Backend Engineer (m/f/d) We’re looking for a backend engineer who thrives in fast-moving environments and enjoys building robust systems end-to-end. You’ll work across data pipelines, APIs and infrastructure, ensuring our platform runs efficiently and scales cleanly as we grow.Your roleDevelop and maintain backend features and APIs for our core platformImprove database performance, reliability and real-time data processingDebug, profile and optimise code to keep latency low and systems stableCollaborate with AI, frontend and product teams to integrate new capabilitiesContribute to architectural decisions and shape the evolution of our backend stackYou are5-7 years’ experience building production-grade backends (Python is a must; additional experience in Go, C++, or Java is valuable)Solid in SQL and data modelling (PostgreSQL or similar)Experienced with REST APIs and cloud environments (AWS preferred)Comfortable working independently and taking ownership of a problemStartup mindset — quick to ship, focused on quality, allergic to bureaucracyNice to haveLinux debugging and performance tuningFamiliarity with orchestration (Kubernetes, Terraform, Ansible)Experience with data pipelines or analytical databasesInterest in edge/cloud hybrid architecturesWhy this role mattersYou’ll help shape how data moves through our system — building fast, reliable infrastructure that powers every customer interaction.What we offerA competitive salary & stock options*Be on the forefront in defining what artificial intelligence means in manufacturingGain hands-on experience in working in an AI-first software company Supportive and inclusive culture that values diversity and promotes the advancement of underrepresented groups within the companyCollaborate with a diverse (currently more than 10 nationalities) and talented team, working on cutting-edge projects with real-world impactNetwork with professionals and leaders in the field, opening doors to potential future career opportunitiesWe have a very flat hierarchy, open 360° feedback, and flexible working hoursEthics⚖: We are committed to developing ethical AI softwareDon't meet all the requirements?Deltia is committed to creating a workplace that is diverse, fair, and inclusive. We encourage candidates from all backgrounds, even if they do not meet every qualification, to submit their application. We firmly believe that having a team with diverse perspectives only strengthens our company and drives innovation. Our commitment also extends to providing an accessible environment for everyone, including those with disabilities. Please let us know if you require any accommodations during the application process or while working with us, and we will do our best to support you.*Only full-time, permanent roles are eligible for stock options. Part-time roles, contract roles, work-student, internships and freelance roles are not eligible for stock options.