Julian Antonielli
Software Engineer at Amazon Web Services (AWS)
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJulian Antonielli is a software engineer based in London with 10 years’ experience building high-performance, production-grade systems across startups and large cloud providers. He currently works at AWS on security logging and the smithy-rs framework, contributing to a logging library that handles tens of thousands of events per second with minimal overhead and to Rust SDK tooling used widely within AWS. Julian is an active open-source contributor to notable projects like Hardhat and the aws-sdk-rust, where he’s improved compilation caching, error redaction for sensitive data, and performance-critical dependencies. He brings a strong back-end focus with practical experience in systems reliability, Rust, Haskell, and performance tuning, and a history of shrinking page load times and launching platform services. Notably, his GitHub handle (jjant) and the lambda symbol hint at a functional-programming mindset that informs his careful approach to security and correctness.
10 years of coding experience
5 years of employment as a software developer
MSc in Software Engineering, MSc in Software Engineering at Instituto Tecnológico de Buenos Aires
English, French, Spanish
Github Skills (25)
caching10
solidity10
typescript10
base64-encoding10
code-generation10
sdk10
aws10
ethereum10
typescript-types10
smart-contracts10
error-handling10
typescripts10
rust10
dependency-management9
dockers9
Programming languages (24)
Github contributions (5)
awslabs/aws-sdk-rust
Oct 2022 - Jan 2023
AWS SDK for the Rust Programming Language
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits in 3 months
Contributions summary:Julian focused on implementing and maintaining core functionalities of the AWS SDK for Rust. Their contributions included fixing sensitive data handling in error displays, improving dependency management by incorporating the `pin-utils` crate and replacing custom base64 implementations with `base64-simd`. They also modified code in various SDK components, specifically, input files and other functionalities. These efforts improved code maintainability, performance, and security of the SDK.
aws-sdkprogramming-languagerustaws
smithy-lang/smithy-rs
Oct 2022 - Jan 2023
Code generation for the AWS SDK for Rust, as well as server and generic smithy client generation.
Role in this project:Back-end Developer
Back-end DeveloperContributions:243 reviews, 43 commits, 60 PRs in 3 months
Contributions summary:Julian primarily focused on enhancing error handling and data redaction within the Smithy Rust code generation project. They implemented and refined the handling of `@sensitive` traits, ensuring sensitive data is appropriately redacted in error messages and display implementations. Additionally, the user refactored the codebase to use the `pin-utils` crate and the `base64-simd` crate. These changes improve the project's functionality and performance.
aws-sdkcode-generationrustawsaws-sdk-rust
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