linkedin/venice
Jul 2025 – Jun 2026
12 Months active
Languages Used
JavaGroovyJSONprotoPropertiesAvroGradleScala
Technical Skills
JavaKafkabackend developmenttestingAPI developmentAvro
Michelle Kwong
PROFILE
Michelle Kwong
Over the past year, contributed to the linkedin/venice repository by designing and delivering robust backend features and stability improvements for distributed data systems. Focused on version lifecycle management, deployment safety, and observability, the work included implementing deferred version swaps, lifecycle hooks, and ingestion pause modes using Java, Avro, and Kafka. Enhanced system reliability through concurrency controls, schema evolution, and integration of gRPC-based protocols, while improving monitoring with OpenTelemetry and detailed logging. Addressed complex rollout scenarios with region-aware validation and automated rollback handling, demonstrating depth in API development, data modeling, and system design to support safer, more predictable deployments at scale.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
65Total
Bugs
18
Commits
65
Features
29
Lines of code
25,810
Activity Months12
Your Network
148 peopleSame Organization
@linkedin.com100
Allen AverbukhMember
Xin(Adam) ChenMember
Ahmet Alp BalkanMember
Alex HopmannMember
Alan Z.Member
Aman GuptaMember
Amaan MarfatiaMember
AMAN PANDEYMember
Abhishek NathMember
Work History
June 2026
3 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for linkedin/venice focused on delivering feature improvements for deferred signaling, stabilizing lifecycle hook initialization, and introducing a post-swap hook with caching to ensure consistent post-swap actions across all version paths. These changes improve rollout control, reduce initialization failures, and enhance performance for lifecycle hooks.
3 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for linkedin/venice focused on delivering feature improvements for deferred signaling, stabilizing lifecycle hook initialization, and introducing a post-swap hook with caching to ensure consistent post-swap actions across all version paths. These changes improve rollout control, reduce initialization failures, and enhance performance for lifecycle hooks.
June 2026
May 2026
8 Commits • 5 Features
May 1, 2026Monthly performance summary for 2026-05 focusing on delivery of robust features, reliability improvements, and flexibility across Venice deployments. Highlights include non-blocking terminal-status handling in push-topic lookups, per-store ingestion pause, per-cluster retention configurability, schema evolution support for paused ingestion, and lifecycle hooks for store/version operations. A set of targeted bug fixes improved rollback robustness, migration reliability, and throttling behavior, contributing to more predictable deployment and data processing.
May 2026
8 Commits • 5 Features
May 1, 2026Monthly performance summary for 2026-05 focusing on delivery of robust features, reliability improvements, and flexibility across Venice deployments. Highlights include non-blocking terminal-status handling in push-topic lookups, per-store ingestion pause, per-cluster retention configurability, schema evolution support for paused ingestion, and lifecycle hooks for store/version operations. A set of targeted bug fixes improved rollback robustness, migration reliability, and throttling behavior, contributing to more predictable deployment and data processing.
April 2026
9 Commits • 4 Features
Apr 1, 2026April 2026, linkedin/venice: Key outcomes include throughput improvements from Separate Real-Time Topic throttling optimization (ecb7624e73f71a41ce86ba37e58dbf5831accfa6); safety fixes preventing concurrent pushes for deferred swaps (792983d0e198c866d9595935a26fe1f00c46d1bd); Avro/schema upgrades and StoreMetaValue bump to v41 with ReadOnlyStore defaults (1cec86c5ef2b75fd93663470d11554cc8a4effe3); ingestion pause mode support via Avro schemas and admin tooling (67eb40ec1d55641ff4adbe46da8e1d03f6dca72e and 3fc3d9eec1341f5edf6c34dd2d46a7b75e67cca6); and ROLLED_BACK version status support in proto/retention (1486568901cfa5f59a5b37560e126ba803fa8392 and 897c3003b11ef6ad2198b40bb63ba8a3116fc2d9).
9 Commits • 4 Features
Apr 1, 2026April 2026, linkedin/venice: Key outcomes include throughput improvements from Separate Real-Time Topic throttling optimization (ecb7624e73f71a41ce86ba37e58dbf5831accfa6); safety fixes preventing concurrent pushes for deferred swaps (792983d0e198c866d9595935a26fe1f00c46d1bd); Avro/schema upgrades and StoreMetaValue bump to v41 with ReadOnlyStore defaults (1cec86c5ef2b75fd93663470d11554cc8a4effe3); ingestion pause mode support via Avro schemas and admin tooling (67eb40ec1d55641ff4adbe46da8e1d03f6dca72e and 3fc3d9eec1341f5edf6c34dd2d46a7b75e67cca6); and ROLLED_BACK version status support in proto/retention (1486568901cfa5f59a5b37560e126ba803fa8392 and 897c3003b11ef6ad2198b40bb63ba8a3116fc2d9).
April 2026
March 2026
10 Commits • 5 Features
Mar 1, 2026March 2026 (linkedin/venice): Delivered stability, observability, and performance improvements across the Venice stack with a focus on high-load write paths and cross-region correctness. Key outcomes include: 1) OpenTelemetry metrics enhancements with per-record metrics, lazy initialization, a configurable enable/disable toggle, and suppression of metric emission for control messages to improve accuracy; 2) Incremental push throttling across the Venice push job and Spark writer to enforce quotas and rate limits under heavy write load; 3) StoreMetaValue Avro schema introduced and operation wait times standardized to a default of 10 minutes; 4) Rollback trigger added to version configuration to improve traceability of version changes; 5) Stability improvements by disabling deferred swap for system stores, accompanied by logging and tests. In addition, regional consistency verification after roll forward was implemented to prevent partial upgrades, and test reliability for hybrid batch push was improved by waiting for empty push completions. Business value includes more predictable throughput, better observability, safer rollbacks, and reduced operational risk; technical accomplishments span OpenTelemetry, Avro schema design, Spark integration, throttling controls, and robust testing.
March 2026
10 Commits • 5 Features
Mar 1, 2026March 2026 (linkedin/venice): Delivered stability, observability, and performance improvements across the Venice stack with a focus on high-load write paths and cross-region correctness. Key outcomes include: 1) OpenTelemetry metrics enhancements with per-record metrics, lazy initialization, a configurable enable/disable toggle, and suppression of metric emission for control messages to improve accuracy; 2) Incremental push throttling across the Venice push job and Spark writer to enforce quotas and rate limits under heavy write load; 3) StoreMetaValue Avro schema introduced and operation wait times standardized to a default of 10 minutes; 4) Rollback trigger added to version configuration to improve traceability of version changes; 5) Stability improvements by disabling deferred swap for system stores, accompanied by logging and tests. In addition, regional consistency verification after roll forward was implemented to prevent partial upgrades, and test reliability for hybrid batch push was improved by waiting for empty push completions. Business value includes more predictable throughput, better observability, safer rollbacks, and reduced operational risk; technical accomplishments span OpenTelemetry, Avro schema design, Spark integration, throttling controls, and robust testing.
February 2026
6 Commits • 4 Features
Feb 1, 2026February 2026: Delivered stability, observability, and governance enhancements for Venice to enable reliable version transitions and improved data ingestion visibility. Key work includes instrumented logging for setEnableWrites to track PUSHED→ONLINE version transitions and deferral of automatic ONLINE state to stabilize writes; introduced per-record timestamp tracking alongside heartbeat messages to enhance visibility into data freshness and ingestion latency; added previousCurrentVersion to track the history of version swaps for auditability; and stabilized the test suite for deferred version swaps and topic management to reduce flakiness and increase coverage. These changes collectively improve operational reliability during upgrades, provide finer-grained insights into ingestion performance, and strengthen governance of version transitions, with a more robust CI/test regime.
6 Commits • 4 Features
Feb 1, 2026February 2026: Delivered stability, observability, and governance enhancements for Venice to enable reliable version transitions and improved data ingestion visibility. Key work includes instrumented logging for setEnableWrites to track PUSHED→ONLINE version transitions and deferral of automatic ONLINE state to stabilize writes; introduced per-record timestamp tracking alongside heartbeat messages to enhance visibility into data freshness and ingestion latency; added previousCurrentVersion to track the history of version swaps for auditability; and stabilized the test suite for deferred version swaps and topic management to reduce flakiness and increase coverage. These changes collectively improve operational reliability during upgrades, provide finer-grained insights into ingestion performance, and strengthen governance of version transitions, with a more robust CI/test regime.
February 2026
January 2026
6 Commits • 2 Features
Jan 1, 2026January 2026: Delivered two core Venice enhancements to improve reliability, deployment safety, and observability for linkedin/venice. Implemented a TTL-driven repush lifecycle with a new Avro schema (StoreMetaValue v39), repush TTL support in version config and AddVersion payload, and corresponding API/internal wiring to manage TTL lifecycle. Hardened Venice Push Job (VPJ) with explicit version-swap checkpoints, correct handling of deferred swaps, and version resolution driven by push settings, augmented by improved logging. Also updated Kafka topic usage semantics for clearer version-based routing. These changes reduce manual interventions, improve data integrity, and accelerate safe deployments across environments.
January 2026
6 Commits • 2 Features
Jan 1, 2026January 2026: Delivered two core Venice enhancements to improve reliability, deployment safety, and observability for linkedin/venice. Implemented a TTL-driven repush lifecycle with a new Avro schema (StoreMetaValue v39), repush TTL support in version config and AddVersion payload, and corresponding API/internal wiring to manage TTL lifecycle. Hardened Venice Push Job (VPJ) with explicit version-swap checkpoints, correct handling of deferred swaps, and version resolution driven by push settings, augmented by improved logging. Also updated Kafka topic usage semantics for clearer version-based routing. These changes reduce manual interventions, improve data integrity, and accelerate safe deployments across environments.
December 2025
2 Commits
Dec 1, 2025December 2025 performance summary for linkedin/venice. Delivered a critical bug fix to version rollout correctness, improving accuracy and reliability of regional swaps. Enhanced observability with additional logging to support debugging and faster incident response. Demonstrated strong traceability through clear commit messages linked to issues #2335 and #2345, contributing to safer, smoother deployments across regions.
2 Commits
Dec 1, 2025December 2025 performance summary for linkedin/venice. Delivered a critical bug fix to version rollout correctness, improving accuracy and reliability of regional swaps. Enhanced observability with additional logging to support debugging and faster incident response. Demonstrated strong traceability through clear commit messages linked to issues #2335 and #2345, contributing to safer, smoother deployments across regions.
December 2025
November 2025
4 Commits • 1 Features
Nov 1, 2025November 2025 — linkedin/venice: Improved reliability and automation of push workflows through two focused changes. (1) Incremental Push Status Handling Enhancement (bug fix): exclude KILLED or ERROR versions when evaluating incremental push statuses and added an integration test to verify that incremental pushes proceed after a previous push was killed. (2) Deferred Version Swap for Empty Pushes (feature): enable empty pushes to leverage DeferredVersionSwapService for version swaps and parent VT cleanup, controlled by the cluster-level setting deferred.version.swap.for.empty.push.enabled. These changes reduce false push failures, automate cleanup, and lay the groundwork for safer, configurable deployments.
November 2025
4 Commits • 1 Features
Nov 1, 2025November 2025 — linkedin/venice: Improved reliability and automation of push workflows through two focused changes. (1) Incremental Push Status Handling Enhancement (bug fix): exclude KILLED or ERROR versions when evaluating incremental push statuses and added an integration test to verify that incremental pushes proceed after a previous push was killed. (2) Deferred Version Swap for Empty Pushes (feature): enable empty pushes to leverage DeferredVersionSwapService for version swaps and parent VT cleanup, controlled by the cluster-level setting deferred.version.swap.for.empty.push.enabled. These changes reduce false push failures, automate cleanup, and lay the groundwork for safer, configurable deployments.
October 2025
8 Commits • 2 Features
Oct 1, 2025In October 2025, delivered two new features for linkedin/venice and enacted a set of reliability and performance enhancements across multi-region version swaps. Key features include a GRPC-based StoreLifecycleHooks implementation with caching and parameter validation, and per-cluster thread pools for DeferredVersionSwapService to isolate work per cluster. On the reliability front, extended terminal statuses to PARTIALLY_ONLINE and aligned truncation logic with terminal states; added safeguards to online transitions by ensuring the parent version exists and the target region is empty; introduced a blocking mechanism to prevent overlapping pushes during deferred swaps; fixed rolled-back version handling and a NullPointerException in DeferredVersionSwapService, and gated sequential roll forward. Performance improvements included reducing the controller client timeout to 1s and moving truncation of parent VT to job polling for better responsiveness and resource management. Overall, these changes yield more stable and predictable deployments, safer multi-region operations, and faster feedback loops for developers and operators. Technologies demonstrated include gRPC-based integrations for store lifecycle hooks, per-cluster threading, concurrency controls, and robust error handling.
8 Commits • 2 Features
Oct 1, 2025In October 2025, delivered two new features for linkedin/venice and enacted a set of reliability and performance enhancements across multi-region version swaps. Key features include a GRPC-based StoreLifecycleHooks implementation with caching and parameter validation, and per-cluster thread pools for DeferredVersionSwapService to isolate work per cluster. On the reliability front, extended terminal statuses to PARTIALLY_ONLINE and aligned truncation logic with terminal states; added safeguards to online transitions by ensuring the parent version exists and the target region is empty; introduced a blocking mechanism to prevent overlapping pushes during deferred swaps; fixed rolled-back version handling and a NullPointerException in DeferredVersionSwapService, and gated sequential roll forward. Performance improvements included reducing the controller client timeout to 1s and moving truncation of parent VT to job polling for better responsiveness and resource management. Overall, these changes yield more stable and predictable deployments, safer multi-region operations, and faster feedback loops for developers and operators. Technologies demonstrated include gRPC-based integrations for store lifecycle hooks, per-cluster threading, concurrency controls, and robust error handling.
October 2025
September 2025
3 Commits • 2 Features
Sep 1, 20252025-09 monthly highlights for linkedin/venice. Delivered features and fixes with clear business value and robust deployment controls across regions. Key features delivered: - Deployment: Ordered region-scoped version rollouts (DeferredVersionSwapService). Implemented ordered sequential roll forwards to enable controlled, region-specific updates, improving deployment reliability and validation processes. (Commit: 0ba489d268ba9206970b0875c2d34b5ba777bc4f) - gRPC lifecycle hooks protocol for store version management. Introduced a new proto for GrpcStoreLifecycleHooks to enable better control over version swaps and lifecycle events. (Commit: fddc44a4808b105ea0161f560dcbc19dfc769ff6) Major bugs fixed: - DeferredVersionSwapService validation flow improvements. Fixed and refined the validation flow for target regions and version swaps; added wait time configuration for deferred swaps and improved handling of region statuses during rollouts. (Commit: 86057b9c0eb84e3f460be16fd5638ea5d0d6317c) Overall impact and accomplishments: - Increased deployment reliability with region-specific sequencing and improved validation to catch issues earlier in the rollout process. - Established lifecycle management for store versions via a dedicated gRPC protocol, enabling safer upgrades and easier lifecycle governance. - Created groundwork for configurable wait times and region status checks, reducing rollout stalls and operator toil. Technologies and skills demonstrated: - gRPC and protocol buffer design, with GrpcStoreLifecycleHooks proto. - Architecture changes in DeferredVersionSwapService for sequential/parallel rollouts and region-aware validation. - Config-driven controls (wait times) and improved use of controller maps for rollout validation. - Focus on business value: safer deployments, predictable rollouts, and clearer lifecycle management for store versions.
September 2025
3 Commits • 2 Features
Sep 1, 20252025-09 monthly highlights for linkedin/venice. Delivered features and fixes with clear business value and robust deployment controls across regions. Key features delivered: - Deployment: Ordered region-scoped version rollouts (DeferredVersionSwapService). Implemented ordered sequential roll forwards to enable controlled, region-specific updates, improving deployment reliability and validation processes. (Commit: 0ba489d268ba9206970b0875c2d34b5ba777bc4f) - gRPC lifecycle hooks protocol for store version management. Introduced a new proto for GrpcStoreLifecycleHooks to enable better control over version swaps and lifecycle events. (Commit: fddc44a4808b105ea0161f560dcbc19dfc769ff6) Major bugs fixed: - DeferredVersionSwapService validation flow improvements. Fixed and refined the validation flow for target regions and version swaps; added wait time configuration for deferred swaps and improved handling of region statuses during rollouts. (Commit: 86057b9c0eb84e3f460be16fd5638ea5d0d6317c) Overall impact and accomplishments: - Increased deployment reliability with region-specific sequencing and improved validation to catch issues earlier in the rollout process. - Established lifecycle management for store versions via a dedicated gRPC protocol, enabling safer upgrades and easier lifecycle governance. - Created groundwork for configurable wait times and region status checks, reducing rollout stalls and operator toil. Technologies and skills demonstrated: - gRPC and protocol buffer design, with GrpcStoreLifecycleHooks proto. - Architecture changes in DeferredVersionSwapService for sequential/parallel rollouts and region-aware validation. - Config-driven controls (wait times) and improved use of controller maps for rollout validation. - Focus on business value: safer deployments, predictable rollouts, and clearer lifecycle management for store versions.
August 2025
5 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for linkedin/venice focusing on measurable value from feature delivery and stability improvements. Delivered Store Lifecycle Management Enhancements with a new store lifecycle schema and lifecycle hooks to manage events during store version swaps, along with validation to ensure correctness in deferred swaps. Strengthened Versioning Reliability and Stability by pinning admin operation to v89 and store to v34, and by ensuring push jobs complete only after successful version swaps, reducing deployment risk and rollout gaps. These efforts improve deployment predictability, reduce downtime during store version transitions, and enhance governance over production configurations.
5 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for linkedin/venice focusing on measurable value from feature delivery and stability improvements. Delivered Store Lifecycle Management Enhancements with a new store lifecycle schema and lifecycle hooks to manage events during store version swaps, along with validation to ensure correctness in deferred swaps. Strengthened Versioning Reliability and Stability by pinning admin operation to v89 and store to v34, and by ensuring push jobs complete only after successful version swaps, reducing deployment risk and rollout gaps. These efforts improve deployment predictability, reduce downtime during store version transitions, and enhance governance over production configurations.
August 2025
July 2025
1 Commits
Jul 1, 2025Month: 2025-07 — LinkedIn Venice stability improvements focusing on version status safety and Kafka roll-forward hygiene. Delivered critical fixes to ensure parent/child store consistency during deferred version swaps and added safeguards to truncate Kafka topics after failed roll-forwards, preserving data integrity and deployment safety. These changes reduce risk of divergent state and stale messages, improving reliability for roll-forward operations. Commit reference: 9e7a0d12771cb6a377098a5ef582a5554c1f7f8f.
July 2025
1 Commits
Jul 1, 2025Month: 2025-07 — LinkedIn Venice stability improvements focusing on version status safety and Kafka roll-forward hygiene. Delivered critical fixes to ensure parent/child store consistency during deferred version swaps and added safeguards to truncate Kafka topics after failed roll-forwards, preserving data integrity and deployment safety. These changes reduce risk of divergent state and stale messages, improving reliability for roll-forward operations. Commit reference: 9e7a0d12771cb6a377098a5ef582a5554c1f7f8f.
Activity
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Quality Metrics
Correctness91.4%
Maintainability86.0%
Architecture87.2%
Performance82.6%
AI Usage43.6%
Skills & Technologies
Programming Languages
AvroGradleGroovyJSONJavaPropertiesScalaprotoprotobuf
Technical Skills
API DesignAPI DevelopmentAPI designAPI developmentAsynchronous ProgrammingAvroBackend DevelopmentBuild ConfigurationCachingConcurrency ManagementConfiguration ManagementController DevelopmentController LogicData ManagementData Modeling
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