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# Senior Backend Engineer (Branded App)

- **Company:** Bsport
- **Location:** Barcelona, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Software Quality, Django Web Framework, Mobile Application Software, Python (Programming Language), PostgreSQL, Privacy Controls, Data Processing, Backend, Event Driven Architecture, Build Management, React Native
- **Published:** July 5, 2026
- **Apply:** https://es.indeed.com/viewjob?jk=c1148c6b6c7a1cf4

## About the Role

5+ years of backend experience, with strong Python (Django) and PostgreSQL at scale. Genuine data-modeling depth, comfortable designing new relational models and running migrations on large, high-volume tables. You thrive in ambiguity taking ownership of greenfield systems from day one. You explore the options, capture your reasoning in ADRs, and rally adjacent teams around a shared direction. Rigorous about code quality, able to move fast without cutting corners on maintainability. Strong communication skills in English. Background in a startup or scale-up, ideally B2B SaaS.

Nice to have
Experience with consumer / member-facing products. Experience with security- and privacy-sensitive features (GDPR, multi-tenant data isolation); able to reason about where data can leak and design against it. Some React Native experience, to collaborate closely with our mobile engineers and occasionally contribute on the client side.

## Description

You'll take ownership of the backend behind a set of new member-facing gamification and engagement features in our white-labeled, premium Branded (mobile) App, shipping capabilities to 500k+ MAUs and driving growth for our B2B clients. This is greenfield, high-ownership work: new services and data models built on top of a large, existing product dataset.
What this mission offers?
A varied, high-ownership mission at the core of the product, with direct impact in the short and medium term. A modern stack and real architectural challenges, such as new data models, event-driven systems, privacy by design. A high-growth context with an engaged team and strong engineering standards. Integrate with background/event-driven processing and notifications. Ensure everything you build is scalable, reliable, and well-tested, end-to-end.

What will be your impact
Design and build new backend services and data models that power upcoming features in our mobile app. Design new relational models from the ground up: weigh architecture options, align with our Core team, and document decisions (ADRs). Build and evolve the APIs / BFF endpoints consumed by the mobile app. Work with large volumes of existing product data to power new experiences, including backfills and migrations on high-volume tables. Treat privacy and data protection (GDPR) as a first-class concern, opt-in flows, and safe multi-tenant data handling. Integrate with background/event-driven processing and notifications. Ensure everything you build is scalable, reliable, and well-tested, end-to-end.


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