Junior Backend Developer

il y a 7 jours

Rue de Vaugirard Paris France Lefty Temps plein
Context & Mission

We are looking for a curious and rigorous Junior Backend Engineer to help design, build, and operate our microservices powering the Lefty platform. You'll work primarily with Java (21+) and modern JVM tooling, build gRPC/Protobuf APIs consumed by our apps, and contribute to data-heavy services using Elasticsearch, ScyllaDB and MariaDB. You'll collaborate with senior engineers, learn best practices, and take ownership of well-scoped features from design to production.

You'll join an agile, ambitious team that values technical excellence, observability, and reliability. You'll contribute to services that ingest and process large-scale social data, including features leveraging open-source AI models to enrich and classify content.

About the position

  • Design and implement services in Java: Build well-structured, maintainable microservices with clean boundaries and clear domain models.

  • Define fast, typed APIs: Ship and evolve gRPC services with Protobuf schemas. Keep contracts stable and backward compatible.

  • Search and storage at scale: Model and query data effectively with Elasticsearch for search and ScyllaDB for high-throughput, low-latency workloads.

  • Quality and reliability: Write unit and integration tests, participate in code reviews, and contribute to resilient, observable systems with logging, metrics, and tracing.

  • Operate what you build: Help monitor production, debug incidents with teammates, and propose pragmatic improvements.

  • Collaborate cross-functionally: Work closely with Product, Frontend, and Data to clarify requirements and deliver business value incrementally.

  • Build and test with Bazel: Use Bazel as our build system for fast, reproducible, and scalable builds and CI. It's a Google-grade toolchain that helps us keep builds hermetic and reliable.

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