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Timur Valeev

PROFILE

Timur Valeev

Timur Valeev engineered advanced observability and tracing features for the DataDog/dd-sdk-android repository, focusing on Real User Monitoring, telemetry, and API modernization. He delivered modularized tracing APIs, enhanced RUM instrumentation, and unified HTTP handling, using Kotlin, Java, and Gradle for robust integration. Timur implemented features such as UI slow frames detection, Cronet-based network monitoring, and custom NDK symbol path support, while refactoring legacy code for maintainability. His work included building lightweight HTTP test servers and improving test reliability, resulting in a more stable SDK. The depth of his contributions strengthened data fidelity, release readiness, and developer experience across the platform.

Overall Statistics

Feature vs Bugs

57%Features

Repository Contributions

354Total
Bugs
51
Commits
354
Features
69
Lines of code
507,753
Activity Months15

Work History

January 2026

3 Commits • 2 Features

Jan 1, 2026

January 2026 monthly summary for DataDog/dd-sdk-android: Delivered default enablement of the UI slow frames feature in the RUM SDK for Android, removed the ExperimentalRumApi annotation, and updated tests to reflect the new default. Also introduced a lightweight HTTP/HTTPS test server to strengthen integration testing for network libraries, enabling verification of network behavior without external dependencies. These changes reduce production risk, improve observability, and accelerate QA cycles.

December 2025

4 Commits • 1 Features

Dec 1, 2025

December 2025 (DataDog/dd-sdk-android): Delivered RUM Instrumentation Enhancement and HTTP Specification Unification. Key outcomes include improved Real User Monitoring instrumentation for more accurate network response metrics and resource tracking, experimental Cronet API support, and centralized HTTP specifications by moving HttpSpec into the internal module. The work was implemented through a focused set of commits that emphasized quality, modularity, and maintainability, including post-review fixes that enhanced stability. This groundwork enables Cronet-driven instrumentation and unified HTTP handling in future releases, delivering measurable business value through better performance insights and more reliable analytics.

November 2025

10 Commits • 4 Features

Nov 1, 2025

November 2025 monthly summary for DataDog/dd-sdk-android focused on strengthening Real User Monitoring, improving reliability, and advancing release readiness. Key features were delivered, bugs resolved, and business value expanded through enhanced observability and faster go-to-market readiness.

October 2025

16 Commits • 5 Features

Oct 1, 2025

October 2025 (DataDog/dd-sdk-android): Focused on enriching observability, stabilizing tests, and accelerating SDK releases. Delivered RUM UserId/AccountId propagation, expanded VitalEvents with connectivity and device data, introduced CPU/memory metrics, and strengthened release tooling for the 3.x line, while eliminating test flakiness in SpanExtIntegrationTest and advancing RumViewScope tests.

September 2025

23 Commits • 11 Features

Sep 1, 2025

September 2025 performance summary for DataDog dd-sdk-android and dd-sdk-android-gradle-plugin. Key migration, stability, and readiness work completed for the 3.x line, with a focus on business value, developer experience, and release readiness. Deliverables include an SDK v3 migration path, a 3.0.0-SNAPSHOT migration and release prep, API surface improvements for Java interop, and stability hardening across tests and baggage header handling.

August 2025

32 Commits • 10 Features

Aug 1, 2025

August 2025 was marked by substantial RUM enhancements, API surface expansion, and stability improvements for DataDog/dd-sdk-android. Key work spanned tracing and sampling improvements with AndroidTracer compatibility, new public FO API surface and implementation, expanded diagnostics with user debug logs, and major UI/data-model migrations that pave the way for future features. Platform stability was strengthened via a minSdk upgrade and a metrics-performance dependency update, complemented by focused code quality efforts and test stabilization.

July 2025

66 Commits • 9 Features

Jul 1, 2025

July 2025 performance highlights for DataDog/dd-sdk-android. Focused on stabilizing instrumentation, modernizing dependencies, and simplifying the public API while preserving feature parity. Delivered a major refactor in RUM-9902 to decouple internal tracing from traces, removing the -trace-internal dependency and consolidating changes to minimize surface area. Implemented a transitive dependency fix to ensure a correct dependency graph and added volatile configuration support for the RUM integration. Completed API simplifications by removing wrapper classes to streamline the public API. Invested in code quality, test stability, and CI reliability through extensive test fixes, TraceContext cleanup, and static analysis improvements (Detekt/Ktlint), plus opentracing removals across modules. Result: a more maintainable codebase, faster release cycles, and improved instrumentation reliability for customers.

June 2025

53 Commits • 4 Features

Jun 1, 2025

June 2025 (DataDog/dd-sdk-android) focused on stability, API modernization, and tracing architecture improvements. Key work included migrating tests to the new API and removing migration abstractions, decoupling internal tracing from external traces in the Wear app, and removing OpenTracing dependencies in favor of a NoOp tracer. The month also delivered API/config cleanups (seeds removal, API surface adjustments), tag extractor/tracer interceptor fixes, and targeted fixes to sampling logic and session rate calculations, all supported by PR feedback integration and post-review fixes. These efforts reduced build fragility, improved reliability, and positioned the project for faster feature delivery and easier maintenance.

May 2025

59 Commits • 4 Features

May 1, 2025

May 2025 — DataDog/dd-sdk-android: Major API modernization and modularization completed, delivering a cleaner, OpenTracing-aligned tracing surface with reduced public exposure and a lighter runtime. Key architectural shifts include removal of CoreTracer/GlobalTracer, adoption of a CoreTracer-free flow via AgentSpan, typealiases, and updated sampling logic; comprehensive API surface fixes; and CI/tooling and test compilation hardening to support safer releases and faster iteration.

April 2025

4 Commits • 1 Features

Apr 1, 2025

In April 2025, the DataDog/dd-sdk-android team delivered targeted improvements to UI performance data accuracy and enhanced RUM telemetry, strengthening observability and reliability for Android applications.

March 2025

25 Commits • 5 Features

Mar 1, 2025

March 2025 monthly summary for DataDog/dd-sdk-android highlights a focused push on RUM capabilities, stability, and telemetry quality across the Android SDK. Key features delivered include EvictingQueue refactor with post-review fixes and debug rollback (RUM-8654), stability improvements for short views and ANR handling (RUM-8630) with API surface adjustments and test support, event schema support for UI slowness (RUM-8657) with post-review fixes, slow frame monitoring enablement and sample app integration (RUM-8947), and UISlownessMetricDispatcher along with telemetry changes that remove frozen frames from telemetry (RUM-8632).

February 2025

22 Commits • 6 Features

Feb 1, 2025

February 2025 for DataDog/dd-sdk-android: Delivered impactful RUM improvements focused on data quality, instrumentation flexibility, and runtime performance, while strengthening code quality through static analysis and CI hygiene. Key outcomes include time-based configuration, view scope instrumentation support, improved slow-frame collection, and a major refactor of jank stats logic, all contributing to more accurate telemetry, faster user experiences, and easier maintainability.

January 2025

8 Commits • 2 Features

Jan 1, 2025

January 2025 performance summary - key deliverables, impact, and capabilities: two major improvements across Datadog Android SDKs strengthened observability and build flexibility. In the Android Gradle plugin, added Custom NDK symbol path support, enabling symbol uploads from user-defined directories in addition to defaults and ensuring symbols from both locations are uploaded reliably. In the DataDog Android SDK, implemented RUM View Ended Telemetry and Metrics Enhancements, introducing telemetry for view-ended events with new dispatchers and state management to quantify view duration, loading time, inter-view transitions, and time-to-network settled, plus internal dispatcher refactors, enum-to-string attribute helpers, improved resolvers for edge cases, and expanded tests and docs. These changes improve data fidelity, reduce integration risk, and provide faster, more actionable insights into user sessions across apps. Key achievements: - Custom NDK symbol path support added to dd-sdk-android-gradle-plugin, enabling symbol uploads from user-defined directories (commit c74ab9a0039749a532e94f2f52b2896c99b5138c). - RUM View Ended Telemetry and Metrics launched in dd-sdk-android with new dispatchers, state management, and metrics (commit ae22aedf2a5ca93bb88228458faa368dee72f830). - Expanded test coverage, API surface stabilization, and documentation updates for RUM telemetry (commits 5957befd05166b4048bbd09b03e8b665e8b86684, af1d0fe8cb222b744675c95ab01360f286cce7d9, e6fb8fb7f8e0fbf96cfb7a36ec990b0898704c28, bd1f4cab43cf07867f01ac806c2de30d71e5f180, 20c91fecd590f11e0847963c5489286c03fcf32d, 2f6ed12853b785246714f67a9668022515955d5f). Overall impact and accomplishments: - Strengthened user session observability and data quality, enabling faster diagnosis of performance issues and more informed product decisions. - Increased build flexibility for symbol uploads, reducing configuration friction for custom app architectures. - Demonstrated end-to-end telemetry capabilities, with code-quality, tests, and documentation to support sustainable maintenance. Technologies/skills demonstrated: - Android Gradle plugin development, NDK symbol handling, and build pipeline customization. - RUM telemetry architecture, dispatchers, and state management for complex event tracking. - Data quality improvements through enum-to-string attribute conversions, edge-case resolvers, and robust testing and documentation.

December 2024

28 Commits • 4 Features

Dec 1, 2024

December 2024 (DataDog/dd-sdk-android): Delivered key timing instrumentation, lazy evaluation enhancements, and sophisticated sampling capabilities across RUM features, complemented by targeted reliability and performance improvements. The work strengthened timing accuracy, reduced test flakiness, and improved analytics fidelity, while keeping dependencies current and tests robust for stable releases.

November 2024

1 Commits • 1 Features

Nov 1, 2024

Month 2024-11: Focused on enriching telemetry capabilities in the Android SDK to support finer-grained analysis. Delivered a new is_main_process property in the telemetry configuration to distinguish events from the main application process, enabling more accurate RUM reporting and analytics. The change is implemented in the DataDog/dd-sdk-android repository (commit c488ebccbf6edbfb5ea81bb1404a33ecb280a367, RUM-7070). Overall, this work improves data fidelity for cross-process telemetry and lays groundwork for targeted optimization and reporting.

Activity

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Quality Metrics

Correctness90.2%
Maintainability89.8%
Architecture86.6%
Performance83.2%
AI Usage21.2%

Skills & Technologies

Programming Languages

APIAPI definitionCSVGradleJSONJavaKotlinMarkdownShellTOML

Technical Skills

API CleanupAPI DesignAPI DevelopmentAPI DocumentationAPI IntegrationAPI Surface ManagementAPI designAndroid DevelopmentAndroid SDKAndroid SDK DevelopmentAndroid TestingAndroid developmentAsynchronous ProgrammingBackend DevelopmentBug Fixing

Repositories Contributed To

2 repos

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

DataDog/dd-sdk-android

Nov 2024 Jan 2026
15 Months active

Languages Used

JavaKotlinCSVGradleTOMLXMLYAMLkotlin

Technical Skills

Android DevelopmentSDK DevelopmentTelemetryAPI DesignAndroid SDKCode Linting

DataDog/dd-sdk-android-gradle-plugin

Jan 2025 Sep 2025
2 Months active

Languages Used

GradleKotlin

Technical Skills

Android DevelopmentGradle Plugin DevelopmentNative Symbol UploadBuild Configuration

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