
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.

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.
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 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.
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: 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.
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 (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.
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 — 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.
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 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.
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 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.
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.
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