mullvad/mullvadvpn-app
Dec 2025 – Dec 2025
1 Month active
Languages Used
Rust
Technical Skills
API developmentRustasynchronous programmingbackend developmentlogging frameworks
Sebastian Holmin
PROFILE
Sebastian Holmin
Developed an advanced logging framework for the mullvad/mullvadvpn-app repository, focusing on real-time daemon log streaming and improved observability. The work involved replacing the existing fern logging system with tracing-subscriber to enable structured, asynchronous logging, resulting in better performance and reliability. Integrated user-facing live log streaming with log level control, allowing users to monitor daemon activity in real time through the CLI. Leveraged Rust, asynchronous programming, and backend development skills to consolidate the logging infrastructure, reduce maintenance overhead, and enhance operational visibility. The solution addressed troubleshooting efficiency and user experience without introducing new documented bug fixes during the period.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
2Total
Bugs
0
Commits
2
Features
1
Lines of code
622
Activity Months1
Your Network
42 peopleShared Repositories
42
Work History
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025 performance summary: Delivered the Advanced Logging Framework with Real-time Daemon Log Streaming for mullvadvpn-app. Replaced fern with tracing-subscriber for structured, asynchronous logging, enabling improved observability and performance. Added user-facing live log streaming with log level control for Mullvad daemon logs. No major bugs fixed this month documented. Impact: improved reliability, faster troubleshooting, and enhanced user experience through real-time visibility of daemon activity. Technologies demonstrated include Rust tracing-subscriber, asynchronous logging, and CLI tooling for log streaming.
2 Commits • 1 Features
Dec 1, 2025December 2025 performance summary: Delivered the Advanced Logging Framework with Real-time Daemon Log Streaming for mullvadvpn-app. Replaced fern with tracing-subscriber for structured, asynchronous logging, enabling improved observability and performance. Added user-facing live log streaming with log level control for Mullvad daemon logs. No major bugs fixed this month documented. Impact: improved reliability, faster troubleshooting, and enhanced user experience through real-time visibility of daemon activity. Technologies demonstrated include Rust tracing-subscriber, asynchronous logging, and CLI tooling for log streaming.
December 2025
Activity
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Quality Metrics
Correctness90.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage30.0%
Skills & Technologies
Programming Languages
Rust
Technical Skills
API developmentRustasynchronous programmingbackend developmentlogging frameworks
Repositories Contributed To
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