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Valentin Grandjean

@valentingrandjean

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DevOps engineer at PokerFlow and Bial-R, building AWS infrastructure and orchestration for SaaS products.

France

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At PokerFlow, I co-founded and run a subscription SaaS platform for poker players, designing and building about 98% of the product. Its TypeScript and Python monorepo includes the desktop, Android, and web versions.

I architected PokerFlow’s serverless AWS infrastructure and automated cloud provisioning with AWS CDK. I also scripted deployment and release automation, and worked on monitoring, subscription billing, testing, and security.

At Bial-R, I own the architecture and DevOps technical decisions of a SaaS product. I re-architected its data platform to use Prefect for workflow orchestration and introduced dbt for data transformation; earlier, I built data science workload and pipeline platforms on AWS.

Experience

Work history, roles, and key accomplishments

Current

Co-founder & Managing Director

Current

PokerFlow (PFLOW SAS)

May 2025 - Present (1 year 5 months)

Co-founded and run PokerFlow, a subscription SaaS platform for poker players, designing and building about 98% of the product. Architected AWS serverless infrastructure with Infrastructure as Code and automated deployment and release processes.

TypeScript Python AWS Lambda API Gateway DynamoDB S3 Amazon Cloudfront Cognito AWS CDK Docker Git Linux BASH NodeJS Capacitor Stripe Discord Hypothesis Fast Check Moto Pip Audit

Current

Lead Developer

Current

Bial-R

Jun 2023 - Present (3 years 4 months)

Own the architecture and DevOps technical decisions of a SaaS product. Re-architected the data platform to migrate its data pipelines to Prefect and introduced dbt as the data transformation tool.

DevOps AWS Prefect DBT Data Pipelines Workflow Orchestration SaaS Architecture

MLOps / DataOps / DevOps Engineer

Bial-R

Jan 2022 - Jun 2023 (1 year 5 months)

Built a platform to run and deploy data science workloads to production on AWS serverless services. Developed distributed data pipelines orchestrated with Prefect and PySpark, and defined the DevOps strategy of a SaaS product.

AWS AWS ECS Fargate Lambda API Gateway Prefect Dask PySpark Terraform CodeBuild AWS CodePipeline CI CD DevOps DataOps MLOps

Machine Learning Engineer

Vox Care

Jan 2021 - Dec 2021 (11 months)

Worked on sound anomaly detection in hospitals, building pipelines that run models in series or in parallel. Built an automatic retraining module based on an annotation tool.

Machine Learning Audio Processing Pipelines Retraining Annotations