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Alex Metelli

PROFILE

Alex Metelli

Worked on the foundry-rs/starknet-foundry and DefiLlama/defillama-server repositories, focusing on smart contract verification tooling and backend reliability. Delivered Voyager contract verification integration and enhanced the sncast CLI with features like test file inclusion and improved file gathering, using Rust, Serde, and TypeScript. Refactored verification workflows for maintainability and consistency across interfaces, and migrated to a dedicated Voyager verifier library to improve reliability. In backend development, addressed stale cache refresh issues in DefiLlama’s AWS Lambda server, ensuring accurate external responses. Emphasized robust testing, clear error handling, and code quality, supporting faster developer iteration and more reliable verification and backend processes.

Overall Statistics

Feature vs Bugs

80%Features

Repository Contributions

7Total
Bugs
1
Commits
7
Features
4
Lines of code
2,298
Activity Months5

Your Network

244 people

Work History

May 2026

1 Commits

May 1, 2026

May 2026: Reliability and correctness improvements for external response caching in the DefiLlama server, with a focused fix to ensure cache refresh occurs for stale data and alignment of tests with the latest refactor.

April 2026

2 Commits • 1 Features

Apr 1, 2026

April 2026: Focused on increasing reliability and configurability of Sncast verification in StarkNet Foundry, migrating to a robust verification library, and expanding test coverage to prevent regressions. Delivered clear network resolution precedence, removed brittle defaults, and added explicit error handling for unknown networks. Result: reduced verification errors in CI, improved maintainability, and accelerated onboarding for contributors.

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly performance for foundry-rs/starknet-foundry: Delivered a refactor of the Starknet contract verification file gathering workflow and improved the cancellation UX. A reusable gather_files function now serves both Voyager and Walnut interfaces, reducing code duplication. The message cancellation flow was updated to display collected files in advance, improving user feedback and preventing confusion during verification sessions. The changes enhance maintainability, cross-interface consistency, and set the stage for future extensions; these updates align with business goals of reliable verification tooling and faster developer iteration.

August 2025

1 Commits • 1 Features

Aug 1, 2025

2025-08 monthly summary for foundry-rs/starknet-foundry: Implemented Voyager verifier enhancement by introducing a --test-files flag to the sncast verify command. This flag enables inclusion of test files under src/ during source code verification for the Voyager verifier, improving verification coverage and reducing manual verification effort. Walnut verifier remains unaffected and will warn if the flag is used. No other code changes reported in this period. This work improves code quality assurance, accelerates validation cycles, and supports more robust Voyager workflows.

July 2025

2 Commits • 1 Features

Jul 1, 2025

July 2025: Delivered Voyager contract verification integration for foundry-rs/starknet-foundry, enabling contract verification via the Voyager block explorer. Implemented a Voyager verification interface and integrated it into the sncast verify command; updated dependencies, tests, and CHANGELOG to reflect the new capability. These changes improve verification reliability and reduce time-to-verification for users deploying StarkNet contracts on Voyager.

Activity

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Quality Metrics

Correctness90.0%
Maintainability81.4%
Architecture84.2%
Performance81.4%
AI Usage22.8%

Skills & Technologies

Programming Languages

MarkdownRustTypeScript

Technical Skills

API IntegrationAPI integrationAWS LambdaCLI DevelopmentCode RefactoringRustRust ProgrammingSerdeSmart Contract DevelopmentSmart Contract VerificationTestingbackend developmenttesting

Repositories Contributed To

2 repos

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

foundry-rs/starknet-foundry

Jul 2025 Apr 2026
4 Months active

Languages Used

MarkdownRust

Technical Skills

API IntegrationCLI DevelopmentRustSerdeSmart Contract VerificationTesting

DefiLlama/defillama-server

May 2026 May 2026
1 Month active

Languages Used

TypeScript

Technical Skills

AWS Lambdabackend development