Backend Developer - APIs

Who we are

The product is a mobile app plus a React web dashboard, with a Python and PostgreSQL backend on AWS. Clients range from single-location retailers to franchise groups with hundreds of stores, all running our point-of-sale and loyalty software. Founded in 1993, we now have 90 employees.

About the role

We're looking for a Backend Developer - APIs to join our team. This is a remote role. You'll work mostly on server-side code: services, queues, databases and the glue between them. Little to no frontend work. You can work from home anywhere in France. We have no office requirement. Weekday working hours, with room to shift your day when needed. Clear written English is a must, as the team works across time zones.

What you'll do

Tune slow queries, add indexes and read query plans. Secure endpoints with OAuth 2.0, JWT validation and proper input checks. Add caching with Redis where it actually helps, and remove it where it doesn't. Reduce cloud costs by right-sizing services and cleaning up unused resources. Instrument services with metrics, structured logs and OpenTelemetry traces. Write integration and contract tests so API changes don't break consumers.

Requirements

2+ years of backend development experience in a production environment. Hands-on experience with AWS, GCP or Azure services. Understanding of concurrency, transactions, idempotency and retries. Working knowledge of message queues or streaming platforms.

Nice to have

Background with high-volume payment or ledger systems. Elasticsearch or OpenSearch. NoSQL stores such as MongoDB, Cassandra or DynamoDB.

What you get

Pay: €59,000 - €71,000 annually

Health insurance (mutuelle) covered at 60%. Two days of remote work per week. Remote work allowance.

Start: Immediately.

Demo job created on 11jobs for testing and demonstrations. It is not an actual opening at Blanchard Cloud.