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Maxim Tsoy

PROFILE

Maxim Tsoy

Maks Tsoy contributed to DuckDuckGo’s privacy-configuration and apple-browsers repositories by building and refining privacy controls, code quality tooling, and user experience features. He implemented granular filter list exceptions and streamlined mitigation policies, using C, JavaScript, and YAML to manage complex configuration logic and cross-platform privacy rules. Maks enhanced CI/CD pipelines with ESLint and Prettier, improving maintainability and code consistency. He also optimized macOS build sizes and delivered targeted bug fixes to reduce false positives in privacy filtering. His work on iOS included JavaScript injection and WKWebView integration, enabling smoother chat interactions and demonstrating depth in both backend and frontend engineering.

Overall Statistics

Feature vs Bugs

76%Features

Repository Contributions

31Total
Bugs
4
Commits
31
Features
13
Lines of code
68,478
Activity Months7

Work History

October 2025

1 Commits • 1 Features

Oct 1, 2025

Month: 2025-10 — Delivered a key iOS UX enhancement for Duck.ai chat in the duckduckgo/apple-browsers repository. The feature enables automatic keyboard focus when starting a new Duck.ai chat, reducing user friction and speeding up interaction.

April 2025

1 Commits

Apr 1, 2025

April 2025 monthly summary focusing on privacy-configuration cleanup and bug fixes that improve maintainability and reduce misconfiguration risk. Delivered a targeted cleanup to remove a stale mitigation entry in the privacy configuration module, aligning with ongoing codebase simplification and privacy safeguards.

February 2025

4 Commits • 2 Features

Feb 1, 2025

February 2025: Policy simplification and performance optimization across two DuckDuckGo repositories, delivering clearer configurations, reduced build sizes, and improved user experience through targeted commits and policy alignments.

January 2025

6 Commits • 2 Features

Jan 1, 2025

January 2025 (2025-01) monthly summary for duckduckgo/privacy-configuration: Delivered targeted privacy controls and cleanup that enhance user consent accuracy and maintainability. Focused on two feature deliveries and a bug/cleanup to improve CPM behavior and overall code health. This work translates to clearer consent rules, better privacy handling, and reduced future maintenance cost across the repository.

December 2024

3 Commits

Dec 1, 2024

December 2024 — duckduckgo/privacy-configuration: Delivered stability and risk-reduction work focused on EasyList integration and policy reversions. Key fixes improved rule parsing to prevent unintended blocking on Google domains and serif.com, and a rollback of CPM mitigations for Skyscanner to a known-good baseline pending further investigation. These changes reduce false positives, limit customer impact, and improve maintainability of the configuration pipeline. Demonstrated proficiency in Git-based change management, cross-domain rule handling, debugging, and rollback procedures, aligning with business goals to minimize support tickets and maintain partner trust.

November 2024

14 Commits • 7 Features

Nov 1, 2024

November 2024 focused on code quality, maintainability, and feature rollouts across three DuckDuckGo repositories. Implemented unified ESLint/Prettier standards, enhanced CI/configuration, and CPM/platform filtering improvements, with removal of redundant features to simplify the codebase. No user-facing bug fixes were identified this period; efforts prioritized stability, performance instrumentation, and scalable developer workflows.

October 2024

2 Commits • 1 Features

Oct 1, 2024

October 2024 monthly summary for the duckduckgo/privacy-configuration repo: Delivered the CPM Experiment rollout on macOS with stability improvements to CPM calculations. This expands controlled experimentation to macOS users, reduces risk of breakage, and supports data-driven decisions in privacy configuration features.

Activity

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Quality Metrics

Correctness86.8%
Maintainability88.8%
Architecture84.6%
Performance81.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

CC++GitGit ConfigurationJSONJavaScriptMJSPythonShellSwift

Technical Skills

Backend DevelopmentBug FixingBug fixingBuild ConfigurationBuild SystemsC programmingC++CI/CDCI/CD ConfigurationCode FormattingCode LintingConfiguration ManagementCross-Platform DevelopmentDevOpsESLint

Repositories Contributed To

4 repos

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

duckduckgo/privacy-configuration

Oct 2024 Apr 2025
6 Months active

Languages Used

CC++Git ConfigurationJSONJavaScriptPythonYAMLTypeScript

Technical Skills

Bug fixingC programmingSystem configurationBuild SystemsCI/CDCode Formatting

duckduckgo/duckduckgo-privacy-extension

Nov 2024 Nov 2024
1 Month active

Languages Used

JavaScriptMJSShellYAML

Technical Skills

CI/CD ConfigurationCode FormattingCode LintingConfiguration ManagementESLintJavaScript

duckduckgo/duckduckgo-autofill

Nov 2024 Nov 2024
1 Month active

Languages Used

GitJavaScriptShellYAML

Technical Skills

CI/CDESLintGitGitHub ActionsJavaScriptPrettier

duckduckgo/apple-browsers

Feb 2025 Oct 2025
2 Months active

Languages Used

XMLJavaScriptSwift

Technical Skills

Build ConfigurationmacOS DevelopmentJavaScript InjectionWKWebViewWeb DevelopmentiOS Development

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