About me

In a few words

I am Cyprien Borée, originally from France and living in Japan since 2022. I am a backend developer focused on building scalable distributed systems on AWS. My background also includes embedded programming and research areas such as multi-objective optimization, multi-agent systems, and bioinformatics.

Outside of work (and parenting!), I enjoy tinkering with side projects, watching movies, and taking long meditative walks. 🚶

I am open to opportunities or just a friendly chat, so don't hesitate to reach out.

In details

Work Experience

Backend Developer at Tensor Energy
– Present

Summary

Core backend developer at a fast-paced renewable energy Japanese startup, I am responsible for the lifecycle of backend services from initial design to production scaling. My role focuses on bridging the gap between complex energy data and a reliable SaaS platform, managing the full stack of backend architecture, AWS infrastructure, and DevOps pipelines to support Japan’s transition to green energy 🌱

Key Achievements

  • Authentication & Performance: Designed and implemented magic-link authentication flows, linking GraphQL BFF servers to internal email APIs. Spearheaded the migration from REST to gRPC, significantly reducing inter-service latency.
  • Third-party integrations: Built robust pipelines to ingest users' electricity metering and monitoring data and automate their balancing plan submissions to OCCTO, managing credentials, certificates and rate limits.
  • Reliability & Observability: Enhanced services with distributed tracing, structured logging, caching policies, rate limiting and retry mechanisms to ensure system stability. Leveraged Grafana for monitoring with dashboards and alerts. visibility.
  • Developer Experience: As the team grew, I contributed to standardizing our development workflow by introducing unified naming conventions and automated CI/CD checks (linters, formatters).

Tech Stack

  • Languages: Go, Python, Typescript
  • AWS: CDK, Cognito, DynamoDB, EKS, EventBridge, Gateway API, IoT, Lambda, RDS, Route 53, S3, SES, SQS, Timestream
  • DevOps: GitHub Actions, GitHub Registry, Docker, Kubernetes
  • API: GraphQL, gRPC, HTTP
  • Database: DuckDB, PostgreSQL, SQLite
  • Middleware & PubSub: Benthos, Nats, Redis
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