Summary: Join bsport as a Senior Backend Engineer on the C&E team, taking technical ownership of systems powering customer insights and personalized experiences. Highlights: 1. Design and evolve customer data pipelines for scale and real-time availability 2. Build and maintain robust data models and APIs for personalized experiences 3. Improve stability, scalability, and observability of high-throughput systems **We are bsport. The place to be!** bsport is an all\-in\-one platform combining boutique fitness and advanced technology. Our platform helps partners manage their bookings, payroll, marketing and more, to streamline operations and boost their commercial success. Since we launched in 2019, we've achieved remarkable growth: Built a community of over 10 million users Closed a €30 million Series B in December 2024 Grown to over 200 employees across Europe **What you’ll own \& the role:** Senior Backend Engineer on the C\&E team. The C\&E teamsits at the core of how studios understand and connect with their customers. It ingests, processes, and activates large volumes of customer events across B2B and B2C products; powering personalization, segmentation, lifecycle messaging, and community\-driven growth. As a **Senior Backend Engineer** you’ll take technical ownership of backend systems that power our C\&E initiatives, including: Designing and evolving **customer data pipelines** that ingest events at scale and make them available in near real time. Building and maintaining **robust data models and APIs** that enable segmentation, targeting, and personalized experiences. Improving **stability, scalability, and observability** of high\-throughput systems used across multiple product verticals. Refactoring and extending parts of our **modular monolith**, enabling teams to move faster without sacrificing clarity or ownership. Collaborate closely with **Product, Data, and other Engineering teams** to turn customer insight into reliable platform capabilities. Problems you'll help solve: How do we scale customer data processing as usage grows across regions and products? How do we ensure personalization logic stays flexible without becoming brittle? How do we reduce bugs and operational noise while increasing delivery speed? How do we enable other teams to build on top of the CDP without tight coupling? **Stack:** AWS Infrastructure as Code: Terraform, Helm Container orchestration: Kubernetes, Docker Monitoring: Grafana, ELK stack Backend: Python Django, FastAPI, Celery Frontend: React, TypeScript (mono\-repos, module federation) Databases: PostgreSQL, Redis, RabbitMQ, Kafka CI/CD: GitLab CI, ArgoCD. **You might be a great fit if:** You’ve designed and owned backend systems used by multiple teams or products. You’ve worked in a SaaS or product\-led environment at meaningful scale. You’re comfortable making architectural decisions and explaining trade\-offs. You enjoy improving existing systems as much as building new ones. You communicate clearly in English and collaborate well across disciplines. **Why join bsport?** Our engineering team is scaling fast, our product is evolving deeply, and we’re raising the bar for technical excellence across the platform. Our benefits package is thoughtfully crafted to ensure you feel valued, supported, and empowered. Plus, we’re continuously enhancing our offerings. Exciting new perks are on the way! **Attractive compensation package****Competitive salary packages based on your experience and role.****Work\-Life harmony** **Hybrid model with 2 remote days to support balance and flexibility.****Work from anywhere** **Enjoy up to 15 days of remote work from abroad each year.****❤️ Private health insurance** **We offer fully\-funded Alan private health coverage so you can focus on what matters most.****Exclusive fitness perks** **Stay active with a specially negotiated gym plan, tailored for you.****Diverse fun loving team** **Multicultural colleagues, after\-work events, team\-building \& more.** **Our Hiring Process:** Interview with Talent ‍ Live Coding ️Tech Talk System Design Final Interview with Founder: cultural fit **Ready to Join?** **Departments** Software Engineering **Role** Senior Backend Software Engineer **Locations** Barcelona Tasso **Remote status** Hybrid **Employment type** Full\-time **Job Level** Confirmed