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Jakub Zalewski

PROFILE

Jakub Zalewski

Jakub worked on the towns-protocol/towns repository, delivering end-to-end MLS-based secure group communication and integrating WebAssembly workflows. He implemented MLS event handling for stream encryption, group management, and external group support, using Go and TypeScript to coordinate backend services and client SDKs. Jakub stabilized WASM packaging by refining build configurations and dependency management, ensuring reliable artifact handling and compatibility upgrades. He improved developer experience by enhancing error messaging and adding user-friendly parameters to the client API. His work also strengthened CI/CD pipelines with better test scaffolding and build reliability, demonstrating depth in cryptography, backend development, and modern build systems.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

15Total
Bugs
2
Commits
15
Features
3
Lines of code
4,209
Activity Months2

Work History

January 2025

13 Commits • 2 Features

Jan 1, 2025

January 2025 was anchored by delivering end-to-end MLS-based secure group communication capabilities and strengthening the release pipeline. The MLS Protocol Integration and Group Management feature delivered a complete set of MLS event handling in stream encryption, epoch-secret lifecycle, external group support, MLS group service, coordination/queue orchestration, and an MLS adapter for client encryption/decryption. The Client UX Enhancement added a userNickname parameter to the Client constructor, improving debugging clarity. SDK error messaging was improved to accurately reflect dataVersion expectations, reducing confusion in production logs. CI/Build/Test Stability improvements stabilized the WASM CI path, added prettier/vitest support, corrected CGO linking, and introduced test scaffolding for olm.wasm, decreasing flaky tests and build failures. Overall impact: stronger security posture, clearer developer experience, and more reliable, faster releases.

December 2024

2 Commits • 1 Features

Dec 1, 2024

December 2024 — Towns repository focus on WebAssembly integration and wasm-based workflows. Delivered WASM SDK integration with a dependency upgrade and stabilized packaging for wasm-reliant components (stress and playground) by refining build configurations and ensuring correct handling of WASM artifacts. Upgraded the lockfile to mls-rs-wasm 0.0.7 to improve compatibility and performance.

Activity

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Quality Metrics

Correctness92.0%
Maintainability92.0%
Architecture90.6%
Performance86.6%
AI Usage22.8%

Skills & Technologies

Programming Languages

GoJavaScriptMJSMTSRustTypeScriptYAML

Technical Skills

API DesignAPI DevelopmentBackend DevelopmentBuild ConfigurationBuild SystemsBuild ToolsCGOCI/CDCode FormattingConfiguration ManagementCryptographyDatabase ManagementDebuggingDependency ManagementEncryption

Repositories Contributed To

1 repo

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

towns-protocol/towns

Dec 2024 Jan 2025
2 Months active

Languages Used

JavaScriptMJSTypeScriptYAMLGoMTSRust

Technical Skills

Build ConfigurationDependency ManagementWASM PackagingAPI DesignAPI DevelopmentBackend Development

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