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Romain Marcadier

PROFILE

Romain Marcadier

Worked on the DataDog/datadog-lambda-extension repository, focusing on backend and system programming challenges over three months. Built and integrated a Rust-based Serverless AppSec Protection Processor, replacing the Go agent to enhance API security and performance. Improved performance and reliability by migrating to async locking with Tokio, resolving runtime dependencies, and optimizing startup through static linking. Enhanced observability and error handling by refining telemetry, introducing null-safe API Gateway response deserialization, and reducing log noise for clearer diagnostics. Leveraged Rust, Go, and asynchronous programming to deliver robust, maintainable features that improved operational visibility, stability, and customer experience in serverless environments.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

8Total
Bugs
0
Commits
8
Features
5
Lines of code
4,477
Activity Months3

Work History

December 2025

2 Commits • 2 Features

Dec 1, 2025

December 2025 (DataDog/datadog-lambda-extension): Focused on robustness and observability in API Gateway integrations. Delivered two core features: null-safe API Gateway response deserialization and observability improvements to reduce log noise. Added tests to validate new behaviors, enhancing reliability and maintainability. No separate bug fixes were recorded this month; the work substantially reduces risk in production and improves customer experience by delivering more predictable API handling and clearer logs.

September 2025

5 Commits • 2 Features

Sep 1, 2025

2025-09 monthly summary for DataDog/datadog-lambda-extension: Delivered targeted performance, stability, and observability improvements across Bottlecap and AppSec Agent Processor (AAP). Migrated to Tokio-based async locking, resolved runtime dependencies, and optimized startup via static linking. Enhanced telemetry and error handling to improve operational visibility and reduce log noise, enabling quicker incident response and more reliable security processing.

August 2025

1 Commits • 1 Features

Aug 1, 2025

In August 2025, focused on porting the Serverless AppSec Protection Processor to Rust for the DataDog Lambda Extension, laying groundwork for Go agent deprecation and stronger API protection. Delivered a Rust-based AppSec Processor and initiated its integration into the proxy and trace processing pipeline, enabling end-to-end protection enhancements.

Activity

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Quality Metrics

Correctness92.6%
Maintainability87.6%
Architecture87.6%
Performance85.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

GoMarkdownRustShellTOMLYAML

Technical Skills

API SecurityAWS LambdaAsynchronous ProgrammingBackend DevelopmentBuild SystemsCI/CDCloud ComputingConcurrencyDependency ManagementDevOpsError HandlingLoggingObservabilityPerformance OptimizationRust

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

DataDog/datadog-lambda-extension

Aug 2025 Dec 2025
3 Months active

Languages Used

GoMarkdownRustShellTOMLYAML

Technical Skills

API SecurityCI/CDCloud ComputingDevOpsRustSystem Programming