Mathieu Grandis
Software Development Engineer II at Amazon Web Services (AWS)
Lyon, Auvergne-Rhône-Alpes, France
Summary
🤩
Rockstar🎓
Top SchoolMathieu Grandis is a Software Development Engineer II based in Lyon with roughly 5 years of hands-on experience building backend systems and improving developer tools at AWS, notably contributing to the widely used aws-sam-cli and the Serverless Application Model (SAM). He combines backend engineering with test automation and infrastructure work—adding ARM support, handling CloudFormation intrinsics, and hardening deployment logic—demonstrating comfort across cloud-native serverless tooling. Prior to AWS he led technical efforts and mentored teams on large enterprise applications for EDF and SNCF, bringing a strong track record of shipping reliable Java/TypeScript systems and guiding junior engineers. Pragmatic and detail-oriented, he often pairs feature work with robust testing and documentation, and has a history of reverting and refining commits to preserve code quality.
5 years of coding experience
11 years of employment as a software developer
Master's degree, Computer Software Engineering, Master's degree, Computer Software Engineering at exia.CESI : Ecole d'Ingénieurs InformatiqueTechnology degree, Computer Science, Technology degree, Computer Science at IUT Lyon 1Master of Engineering - MEng, Computer Software Engineering, Master of Engineering - MEng, Computer Software Engineering at INSA Lyon - Institut National des Sciences Appliquées de Lyon
English, French, Spanish
Github Skills (18)
pytest10
python10
aws-sam10
aws10
serverless10
testing9
aws-cloudformation9
cli9
json-schema-validator8
json-validation8
api-gateway8
validation8
schema-validation8
json-schema8
docker6
Programming languages (4)
Github contributions (5)
aws/serverless-application-model
Nov 2020 - Oct 2021
The AWS Serverless Application Model (AWS SAM) transform is a AWS CloudFormation macro that transforms SAM templates into CloudFormation templates.
Role in this project:
Backend & Test Automation Engineer
Backend & Test Automation EngineerContributions:3 releases, 181 reviews, 71 commits in 11 months
Contributions summary:Mathieu primarily contributed to the AWS Serverless Application Model (SAM) project by implementing new features and writing tests. They added functionality to handle `Fn::If` intrinsic functions within deployment preference alarms. The user also created new test groups for side effects and intrinsic tests related to Function SNS and S3 events, ensuring the reliability and correctness of the SAM translator. Furthermore, the user contributed to infrastructure code updates, including adding support for ARM architecture.
awsaws-cloudformationaws-samserverless-application-modelserverless
aws/aws-sam-cli
Dec 2020 - Sep 2021
CLI tool to build, test, debug, and deploy Serverless applications using AWS SAM
Role in this project:Backend Developer
Backend DeveloperContributions:166 reviews, 24 commits, 38 PRs in 10 months
Contributions summary:Mathieu contributed to the `aws/aws-sam-cli` repository by implementing features to support HttpApi URIs generated by the CDK, modifying code related to Lambda function ARN extraction. They fixed build graph tests, replacing `assertEqual` with `assertTrue` and adding assertions. The user also reverted a previous commit related to logging and documentation updates, and bumped the version of the CLI.
aws-samcliserverless-applicationsserverlessaws
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.