
Yiannis developed and maintained mobile analytics and survey features across the PostHog/posthog.com and PostHog/posthog-js repositories, focusing on privacy, reliability, and developer experience. He delivered cross-platform documentation and SDK enhancements for iOS, React Native, and Flutter, including session replay privacy controls, dynamic survey branching, and onboarding improvements. Using TypeScript, Swift, and JavaScript, Yiannis implemented caching strategies, configuration management, and feature flagging to streamline integration and reduce support overhead. His work addressed platform-specific challenges such as method swizzling and App Groups on iOS, ensuring robust analytics coverage and clear guidance for developers integrating PostHog’s mobile SDKs and survey tools.

October 2025 performance summary focusing on delivering business value through reliability improvements and developer-facing documentation. Highlights include a cache-first fix for surveys on first launch in PostHog-js, and comprehensive iOS integration documentation updates for swizzling and App Groups in PostHog.com.
October 2025 performance summary focusing on delivering business value through reliability improvements and developer-facing documentation. Highlights include a cache-first fix for surveys on first launch in PostHog-js, and comprehensive iOS integration documentation updates for swizzling and App Groups in PostHog.com.
August 2025 delivered cross‑platform momentum across PostHog’s JS, native SDKs, and documentation. Key features included dynamic survey branching in React Native, and the GA rollout of Surveys for iOS and React Native SDKs. Major fixes and documentation improvements reduced onboarding friction and improved user experience for mobile deployments. Demonstrated proficiency in React Native, Flutter, iOS/Android, unit testing, and technical writing, enabling faster adoption and cleaner developer workflows.
August 2025 delivered cross‑platform momentum across PostHog’s JS, native SDKs, and documentation. Key features included dynamic survey branching in React Native, and the GA rollout of Surveys for iOS and React Native SDKs. Major fixes and documentation improvements reduced onboarding friction and improved user experience for mobile deployments. Demonstrated proficiency in React Native, Flutter, iOS/Android, unit testing, and technical writing, enabling faster adoption and cleaner developer workflows.
July 2025 Developer Monthly Summary — PostHog Delivered notable documentation enhancements and onboarding improvements across PostHog.com and PostHog, prioritizing mobile SDK adoption and event handling capabilities. Key features and docs updates spanned iOS BeforeSendBlock, Flutter Surveys integration docs, and a broader Surveys rollout with onboarding banners and mobile SDK updates. This work was complemented by cross-repo collaboration to ensure consistent guidance across React Native, iOS, and Flutter. Key features delivered: - iOS BeforeSendBlock documentation: introduced how to amend, drop, or sample events before sending to PostHog, with guidance for chaining multiple blocks; replaces deprecated propertiesSanitizer. Commits: 8a12b02cf73c64f98efc49820e5d64907e87f0ba. - Flutter Surveys integration documentation: end-to-end docs for Android/iOS manual installation steps, Dart setup, and a dedicated Flutter tab on the surveys installation page. Commits: 099f218c91817f21f0871766d2938e8881c57b26. - Surveys rollout: onboarding banners across React Native, iOS, and Flutter, plus mobile SDK updates to support survey integration (installation guides, code snippets, Groovy support, and session replay/surveys setup). Commits: 079cd0390ea38d1a6b40987d591e5a4f9ff3bacc; 927d600841b34950e05239c1c6c34346cf422667. Major bugs fixed: - Addressed documentation debt and deprecation migration by providing clear BeforeSendBlock guidance and replacing deprecated propertiesSanitizer usage with robust examples, reducing misconfigurations. - Clarified Flutter and React Native onboarding steps to prevent installation/configuration issues and accelerate time-to-value for Surveys Beta. Overall impact and accomplishments: - Accelerated developer adoption of new Surveys Beta features by delivering comprehensive, cross-platform docs and streamlined onboarding content. - Strengthened cross-repo alignment (PostHog.com and PostHog) for mobile integration flows, leading to faster onboarding and fewer support tickets related to setup. - Demonstrated end-to-end capability improvements in mobile experiences, aligning installers, code snippets, and session replay/surveys workflows. Technologies/skills demonstrated: - iOS (Swift) and mobile SDK concepts, Dart/Flutter, React Native integration patterns, Groovy scripting in install steps, and session replay/surveys orchestration. Top 3-5 achievements for the month (for performance reviews): - iOS BeforeSendBlock docs added with practical examples and migration guidance (#11928) [Commit: 8a12b02f73...]. - Flutter surveys integration docs published (#12209) [Commit: 099f218c918...]. - Surveys onboarding rollout and mobile SDK updates across RN/iOS/Flutter (#35499, #35497) [Commits: 079cd0390e..., 927d6008...]. - Cross-repo docs consolidation, including Groovy support and session replay/surveys setup improvements (commit 927d6008...).
July 2025 Developer Monthly Summary — PostHog Delivered notable documentation enhancements and onboarding improvements across PostHog.com and PostHog, prioritizing mobile SDK adoption and event handling capabilities. Key features and docs updates spanned iOS BeforeSendBlock, Flutter Surveys integration docs, and a broader Surveys rollout with onboarding banners and mobile SDK updates. This work was complemented by cross-repo collaboration to ensure consistent guidance across React Native, iOS, and Flutter. Key features delivered: - iOS BeforeSendBlock documentation: introduced how to amend, drop, or sample events before sending to PostHog, with guidance for chaining multiple blocks; replaces deprecated propertiesSanitizer. Commits: 8a12b02cf73c64f98efc49820e5d64907e87f0ba. - Flutter Surveys integration documentation: end-to-end docs for Android/iOS manual installation steps, Dart setup, and a dedicated Flutter tab on the surveys installation page. Commits: 099f218c91817f21f0871766d2938e8881c57b26. - Surveys rollout: onboarding banners across React Native, iOS, and Flutter, plus mobile SDK updates to support survey integration (installation guides, code snippets, Groovy support, and session replay/surveys setup). Commits: 079cd0390ea38d1a6b40987d591e5a4f9ff3bacc; 927d600841b34950e05239c1c6c34346cf422667. Major bugs fixed: - Addressed documentation debt and deprecation migration by providing clear BeforeSendBlock guidance and replacing deprecated propertiesSanitizer usage with robust examples, reducing misconfigurations. - Clarified Flutter and React Native onboarding steps to prevent installation/configuration issues and accelerate time-to-value for Surveys Beta. Overall impact and accomplishments: - Accelerated developer adoption of new Surveys Beta features by delivering comprehensive, cross-platform docs and streamlined onboarding content. - Strengthened cross-repo alignment (PostHog.com and PostHog) for mobile integration flows, leading to faster onboarding and fewer support tickets related to setup. - Demonstrated end-to-end capability improvements in mobile experiences, aligning installers, code snippets, and session replay/surveys workflows. Technologies/skills demonstrated: - iOS (Swift) and mobile SDK concepts, Dart/Flutter, React Native integration patterns, Groovy scripting in install steps, and session replay/surveys orchestration. Top 3-5 achievements for the month (for performance reviews): - iOS BeforeSendBlock docs added with practical examples and migration guidance (#11928) [Commit: 8a12b02f73...]. - Flutter surveys integration docs published (#12209) [Commit: 099f218c918...]. - Surveys onboarding rollout and mobile SDK updates across RN/iOS/Flutter (#35499, #35497) [Commits: 079cd0390e..., 927d6008...]. - Cross-repo docs consolidation, including Groovy support and session replay/surveys setup improvements (commit 927d6008...).
June 2025 monthly summary: Prioritized developer experience and reliability. Delivered iOS SDK documentation improvements in PostHog/posthog.com for clearer API usage and platform coverage, and fixed survey submission logic with UI enhancements in PostHog/posthog-js-lite to ensure correct handling of single vs. multiple selections and better UX for disabled buttons. These changes reduce onboarding time, improve data quality from surveys, and strengthen cross-repo maintainability.
June 2025 monthly summary: Prioritized developer experience and reliability. Delivered iOS SDK documentation improvements in PostHog/posthog.com for clearer API usage and platform coverage, and fixed survey submission logic with UI enhancements in PostHog/posthog-js-lite to ensure correct handling of single vs. multiple selections and better UX for disabled buttons. These changes reduce onboarding time, improve data quality from surveys, and strengthen cross-repo maintainability.
Monthly summary for May 2025 focusing on feature delivery and quality improvements across targeted repos. Highlights include iOS-specific session replay enhancements with privacy masking and console log capture, plus expanded visibility into app logs during session recording to speed debugging and support. No major bug fixes reported this month; efforts concentrated on documentation, feature enablement, and cross-repo collaboration to align with privacy and developer experience goals.
Monthly summary for May 2025 focusing on feature delivery and quality improvements across targeted repos. Highlights include iOS-specific session replay enhancements with privacy masking and console log capture, plus expanded visibility into app logs during session recording to speed debugging and support. No major bug fixes reported this month; efforts concentrated on documentation, feature enablement, and cross-repo collaboration to align with privacy and developer experience goals.
April 2025: Delivered reliability, security, and documentation enhancements across three repositories. Fixed survey behavior to avoid false validation errors, remediated a CVE via dependency upgrades, and published developer-facing docs that clarify iOS survey usage, conditional questions, and reuseAnonymousId/autocapture behavior. These changes reduce user friction, strengthen security posture, and support faster developer adoption.
April 2025: Delivered reliability, security, and documentation enhancements across three repositories. Fixed survey behavior to avoid false validation errors, remediated a CVE via dependency upgrades, and published developer-facing docs that clarify iOS survey usage, conditional questions, and reuseAnonymousId/autocapture behavior. These changes reduce user friction, strengthen security posture, and support faster developer adoption.
Month: 2025-03 | Repo: PostHog/posthog.com. Key features delivered: Updated iOS Session Replay documentation and renamed the configuration parameter from debouncerDelay to throttleDelay to clarify usage and its impact on performance and replay smoothness. Major bugs fixed: none reported this month. Overall impact and accomplishments: Improved developer onboarding for iOS session replay, reduced misconfiguration risk, and better maintainability through explicit parameter naming and documentation. Technologies/skills demonstrated: documentation best practices, change management, version control discipline, and cross-team collaboration with docs and engineering.
Month: 2025-03 | Repo: PostHog/posthog.com. Key features delivered: Updated iOS Session Replay documentation and renamed the configuration parameter from debouncerDelay to throttleDelay to clarify usage and its impact on performance and replay smoothness. Major bugs fixed: none reported this month. Overall impact and accomplishments: Improved developer onboarding for iOS session replay, reduced misconfiguration risk, and better maintainability through explicit parameter naming and documentation. Technologies/skills demonstrated: documentation best practices, change management, version control discipline, and cross-team collaboration with docs and engineering.
February 2025 — PostHog/posthog.com: Delivered clarity on session replay availability, fixed support filters in the handbook, and enhanced iOS documentation for CocoaPods and SwiftUI screen tracking. These changes improve customer understanding, support accuracy, and developer guidance, reducing confusion and support load while enabling more consistent iOS integration.
February 2025 — PostHog/posthog.com: Delivered clarity on session replay availability, fixed support filters in the handbook, and enhanced iOS documentation for CocoaPods and SwiftUI screen tracking. These changes improve customer understanding, support accuracy, and developer guidance, reducing confusion and support load while enabling more consistent iOS integration.
January 2025 — PostHog.com: Session Replay Enhancements and Documentation delivered. Implemented granular masking control for session replay with a new SwiftUI modifier postHogNoMask(), complementing postHogMask(), and published comprehensive session replay documentation across Android, iOS, Flutter, and React Native. Also provided guidance on enabling recordings in project settings, manual start/stop of recordings, and SDK version considerations that affect personProfiles and events. These changes improve privacy controls, data quality, and developer onboarding for mobile platforms.
January 2025 — PostHog.com: Session Replay Enhancements and Documentation delivered. Implemented granular masking control for session replay with a new SwiftUI modifier postHogNoMask(), complementing postHogMask(), and published comprehensive session replay documentation across Android, iOS, Flutter, and React Native. Also provided guidance on enabling recordings in project settings, manual start/stop of recordings, and SDK version considerations that affect personProfiles and events. These changes improve privacy controls, data quality, and developer onboarding for mobile platforms.
December 2024 focused on privacy-first maintenance and developer enablement across two repos (PostHog.com and PostHog-js-lite). The work centered on removing deprecated masking options, deprecating features in the React Native SDK, and delivering targeted documentation to improve filtering and data handling in reports. These efforts reduce surface area, align masking policy across platforms, and improve data quality and compliance for downstream analytics and product teams.
December 2024 focused on privacy-first maintenance and developer enablement across two repos (PostHog.com and PostHog-js-lite). The work centered on removing deprecated masking options, deprecating features in the React Native SDK, and delivering targeted documentation to improve filtering and data handling in reports. These efforts reduce surface area, align masking policy across platforms, and improve data quality and compliance for downstream analytics and product teams.
November 2024 monthly summary focused on strengthening documentation quality for React Native and iOS, improving session replay privacy configurations, and advancing open-source sponsorship references. Delivered precise, cross-linked docs, updated privacy-related configuration options, and introduced iOS session replay masking controls in the JS lite package to give developers explicit privacy controls. Business value: clearer guidance for integration, reduced support friction, and enhanced privacy posture across platforms.
November 2024 monthly summary focused on strengthening documentation quality for React Native and iOS, improving session replay privacy configurations, and advancing open-source sponsorship references. Delivered precise, cross-linked docs, updated privacy-related configuration options, and introduced iOS session replay masking controls in the JS lite package to give developers explicit privacy controls. Business value: clearer guidance for integration, reduced support friction, and enhanced privacy posture across platforms.
Monthly work summary for 2024-10 focusing on iOS feature flag documentation improvements for PostHog.com. Key enhancements clarify the feature flag reload sequence, ensure flags are loaded before usage, and document didReceiveFeatureFlags handling along with using the reloadFeatureFlags completion block. This effort aligns with a targeted docs fix (commit 6eafbd224771cc620e404d6cc57d9cca6085070b) addressing the flags-loading section (PR #9765). Business impact includes improved reliability of iOS feature flag usage in client apps, reduced support overhead, and faster developer onboarding. Technologies and skills demonstrated include technical writing, documentation standards, iOS feature flag lifecycle, and code-example authoring.
Monthly work summary for 2024-10 focusing on iOS feature flag documentation improvements for PostHog.com. Key enhancements clarify the feature flag reload sequence, ensure flags are loaded before usage, and document didReceiveFeatureFlags handling along with using the reloadFeatureFlags completion block. This effort aligns with a targeted docs fix (commit 6eafbd224771cc620e404d6cc57d9cca6085070b) addressing the flags-loading section (PR #9765). Business impact includes improved reliability of iOS feature flag usage in client apps, reduced support overhead, and faster developer onboarding. Technologies and skills demonstrated include technical writing, documentation standards, iOS feature flag lifecycle, and code-example authoring.
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