> Markdown version of [/jobs/ext/4663527-senior-backend-platform-engineer-async-events](https://www.wearedevelopers.com/jobs/ext/4663527-senior-backend-platform-engineer-async-events). 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 Backend Platform Engineer (Async, Events) - **Company:** Alan Sa. - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** Python (Programming Language), PostgreSQL, Redis, SQLAlchemy, Data Streaming, Flask (Web Framework), Grafana, Backend - **Published:** November 11, 2026 - **Apply:** https://www.jobleads.com/es/job/senior-backend-platform-engineer-async-events--barcelona--e1e6393c04830c0e4240a60db2c04c402 ## About the Role With 5+ years in backend development, you will design scalable Python systems, work with Flask, SQLAlchemy, PostgreSQL, Redis, and observability tools. English proficiency is required; French is a plus but not required. ## Description Alan is hiring for a Backend Engineer to join the Backend Platform in Barcelona. You will own the backend building blocks that power Alan products, shaping async services and data flows for millions of users. With 5+ years in backend development, you will design scalable Python systems, work with Flask, SQLAlchemy, PostgreSQL, Redis, and observability tools. English proficiency is required; French is a plus but not required.