hiero-ledger/hiero-mirror-node
Oct 2024 – Oct 2025
12 Months active
Languages Used
BashJSONJavaScriptMarkdownYAMLJavabashjavascript
Technical Skills
API DevelopmentBackend DevelopmentCitusConfiguration ManagementDevOpsGCP
Jesse Nelson
PROFILE
Jesse Nelson
Jesse contributed to the hiero-ledger/hiero-mirror-node repository by engineering robust backend systems that improved data integrity, scalability, and operational reliability. He developed and optimized REST APIs, implemented Redis-backed caching, and enhanced database partitioning and schema design using Java and SQL. Jesse automated Citus cluster management with shell scripting and Helm, streamlined CI/CD workflows with GitHub Actions, and expanded test coverage for non-zero shard/realm configurations. His work included refining EVM address handling, enabling zero-downtime environment duplication, and strengthening observability for distributed systems. These efforts resulted in faster queries, resilient deployments, and more reliable data processing across cloud-native Kubernetes environments.
Overall Statistics
Feature vs Bugs
81%Features
Repository Contributions
63Total
Bugs
8
Commits
63
Features
35
Lines of code
30,676
Activity Months12
Your Network
52 people
Work History
October 2025
6 Commits • 3 Features
Oct 1, 2025October 2025: Focused on data-layer enhancements, reliability improvements, and release readiness for hiero-mirror-node. Delivered performance-oriented schema/indexing changes, stabilized CI/CD workflows, and updated release processes to ensure compatibility with preview environments. Business impact centers on faster data queries, more reliable deployments, and clearer release criteria.
6 Commits • 3 Features
Oct 1, 2025October 2025: Focused on data-layer enhancements, reliability improvements, and release readiness for hiero-mirror-node. Delivered performance-oriented schema/indexing changes, stabilized CI/CD workflows, and updated release processes to ensure compatibility with preview environments. Business impact centers on faster data queries, more reliable deployments, and clearer release criteria.
October 2025
September 2025
2 Commits • 2 Features
Sep 1, 2025September 2025 (2025-09) monthly summary for hiero-mirror-node: Delivered two production-ready features that enhance scalability and disaster recovery: Web3 service auto-scaling based on a new gas-usage metric, and zero-downtime environment duplication for Citus clusters. Production enablement, automation, and documentation are in place to sustain growth and reliability.
September 2025
2 Commits • 2 Features
Sep 1, 2025September 2025 (2025-09) monthly summary for hiero-mirror-node: Delivered two production-ready features that enhance scalability and disaster recovery: Web3 service auto-scaling based on a new gas-usage metric, and zero-downtime environment duplication for Citus clusters. Production enablement, automation, and documentation are in place to sustain growth and reliability.
August 2025
2 Commits
Aug 1, 2025Concise monthly summary for 2025-08 focusing on reliability of partitioned data workflows and simplification of autoscaling signals in hiero-mirror-node. The period delivered clear business value by stabilizing time handling, optimizing migrations, and reducing operational noise in scaling decisions.
2 Commits
Aug 1, 2025Concise monthly summary for 2025-08 focusing on reliability of partitioned data workflows and simplification of autoscaling signals in hiero-mirror-node. The period delivered clear business value by stabilizing time handling, optimizing migrations, and reducing operational noise in scaling decisions.
August 2025
July 2025
8 Commits • 5 Features
Jul 1, 2025July 2025 (2025-07) – hiero-mirror-node: Delivered data enrichment, performance optimization, operational automation, and testing improvements that directly boost data completeness, system reliability, and maintenance efficiency. The work enhances queryability of synthetic transfer logs, tunes Web3 performance for higher throughput under load, and strengthens upgrade/runbook workflows, alongside QA test reliability enhancements.
July 2025
8 Commits • 5 Features
Jul 1, 2025July 2025 (2025-07) – hiero-mirror-node: Delivered data enrichment, performance optimization, operational automation, and testing improvements that directly boost data completeness, system reliability, and maintenance efficiency. The work enhances queryability of synthetic transfer logs, tunes Web3 performance for higher throughput under load, and strengthens upgrade/runbook workflows, alongside QA test reliability enhancements.
June 2025
6 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for hiero-ledger/hiero-mirror-node focusing on business value and technical achievements. Delivered concrete improvements that simplify EVM address handling, broaden test coverage for non-zero shard/realm configurations, and streamline deployments through chart dependency upgrades. These changes enhance performance, reliability, and deployment readiness while increasing developer velocity.
6 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for hiero-ledger/hiero-mirror-node focusing on business value and technical achievements. Delivered concrete improvements that simplify EVM address handling, broaden test coverage for non-zero shard/realm configurations, and streamline deployments through chart dependency upgrades. These changes enhance performance, reliability, and deployment readiness while increasing developer velocity.
June 2025
May 2025
5 Commits • 3 Features
May 1, 2025May 2025 performance summary for hiero-ledger/hiero-mirror-node: Delivered four high-impact updates spanning resilience, testing, data integrity, and observability. Importer migration resilience was enhanced to gracefully handle missing batch parents and null entities, with recoverable error logging and an NPE fix to prevent crashes. Introduced REST API cross-implementation integration testing, enabling tests against both Node.js and Java implementations and adding a Gradle task to run dual-implementation specs. Ensured historical balance generation reliability by creating a synthetic treasury account when none is found and refining account queries to exclude it from specific views. Strengthened observability for the Citus cluster by refreshing dashboards, adding health alerts for pgbouncer and PostgreSQL, and configuring the StackGres collector to drop high-cardinality metrics, reducing noise and improving monitoring performance. These changes collectively improve system resilience, validation depth, financial data accuracy, and operator visibility, delivering business value through reduced downtime, higher confidence in cross-platform behavior, and more reliable reporting.
May 2025
5 Commits • 3 Features
May 1, 2025May 2025 performance summary for hiero-ledger/hiero-mirror-node: Delivered four high-impact updates spanning resilience, testing, data integrity, and observability. Importer migration resilience was enhanced to gracefully handle missing batch parents and null entities, with recoverable error logging and an NPE fix to prevent crashes. Introduced REST API cross-implementation integration testing, enabling tests against both Node.js and Java implementations and adding a Gradle task to run dual-implementation specs. Ensured historical balance generation reliability by creating a synthetic treasury account when none is found and refining account queries to exclude it from specific views. Strengthened observability for the Citus cluster by refreshing dashboards, adding health alerts for pgbouncer and PostgreSQL, and configuring the StackGres collector to drop high-cardinality metrics, reducing noise and improving monitoring performance. These changes collectively improve system resilience, validation depth, financial data accuracy, and operator visibility, delivering business value through reduced downtime, higher confidence in cross-platform behavior, and more reliable reporting.
April 2025
5 Commits • 4 Features
Apr 1, 2025April 2025 monthly summary for hiero-ledger/hiero-mirror-node: Focused on reliability enhancements, API and data ingestion improvements, and test cleanliness to improve production stability and developer experience. Key deliverables included enabling default backups for production StackGres clusters and removing PodDisruptionBudgets to boost availability; batch transaction support in the importer and API (HIP-551) with corresponding schema and REST changes; token ID API enhancement to support long zero addresses with updated OpenAPI and parsing logic; and test configuration cleanup to simplify test setup. These changes collectively improve production reliability, data processing throughput, and API coverage.
5 Commits • 4 Features
Apr 1, 2025April 2025 monthly summary for hiero-ledger/hiero-mirror-node: Focused on reliability enhancements, API and data ingestion improvements, and test cleanliness to improve production stability and developer experience. Key deliverables included enabling default backups for production StackGres clusters and removing PodDisruptionBudgets to boost availability; batch transaction support in the importer and API (HIP-551) with corresponding schema and REST changes; token ID API enhancement to support long zero addresses with updated OpenAPI and parsing logic; and test configuration cleanup to simplify test setup. These changes collectively improve production reliability, data processing throughput, and API coverage.
April 2025
March 2025
8 Commits • 3 Features
Mar 1, 2025March 2025 for hiero-mirror-node: Delivered shard/realm aware data model and APIs across staking, entity IDs, web3 API, and REST endpoints, with non-zero shard/realm support and standardized system IDs. Refactored test infrastructure to align acceptance tests with shard/realm properties, boosting reliability. Achieved dependency stability by downgrading Hedera SDK to 2.50.0 and updating JOOQ to 3.20.2. Updated Batch Transactions API design documentation to clarify block-stream handling and data access.
March 2025
8 Commits • 3 Features
Mar 1, 2025March 2025 for hiero-mirror-node: Delivered shard/realm aware data model and APIs across staking, entity IDs, web3 API, and REST endpoints, with non-zero shard/realm support and standardized system IDs. Refactored test infrastructure to align acceptance tests with shard/realm properties, boosting reliability. Achieved dependency stability by downgrading Hedera SDK to 2.50.0 and updating JOOQ to 3.20.2. Updated Batch Transactions API design documentation to clarify block-stream handling and data access.
February 2025
8 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for hiero-ledger/hiero-mirror-node: Key features and bug fixes delivered, operational improvements, and architectural guidance to increase data reliability, observability, and deployment stability. Highlights include node data migration reliability fixes, migration code refactor and instrumentation, StackGres upgrade with operational improvements, enhanced historical data queries, and batch transaction design documentation. These efforts reduce data inconsistencies, improve historical query capabilities, and provide clearer design groundwork for batch processing.
8 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for hiero-ledger/hiero-mirror-node: Key features and bug fixes delivered, operational improvements, and architectural guidance to increase data reliability, observability, and deployment stability. Highlights include node data migration reliability fixes, migration code refactor and instrumentation, StackGres upgrade with operational improvements, enhanced historical data queries, and batch transaction design documentation. These efforts reduce data inconsistencies, improve historical query capabilities, and provide clearer design groundwork for batch processing.
February 2025
January 2025
4 Commits • 3 Features
Jan 1, 2025January 2025 monthly summary for hiero-ledger/hiero-mirror-node: Focused on reliability, API capability expansion, and database connectivity to support high availability and scalable reads. Delivered back-end resilience improvements, expanded Hedera Mirror Node REST API capabilities, and primary SQL/database connectivity with support for default/primary pools (read replicas and failover).
January 2025
4 Commits • 3 Features
Jan 1, 2025January 2025 monthly summary for hiero-ledger/hiero-mirror-node: Focused on reliability, API capability expansion, and database connectivity to support high availability and scalable reads. Delivered back-end resilience improvements, expanded Hedera Mirror Node REST API capabilities, and primary SQL/database connectivity with support for default/primary pools (read replicas and failover).
November 2024
6 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for hiero-mirror-node focused on delivering performance, reliability, and data integrity improvements across REST API caching, release processes, and Citus deployments. The work underscores strong collaboration between backend caching, data layer optimization, and deployment hygiene to drive business value.
6 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for hiero-mirror-node focused on delivering performance, reliability, and data integrity improvements across REST API caching, release processes, and Citus deployments. The work underscores strong collaboration between backend caching, data layer optimization, and deployment hygiene to drive business value.
November 2024
October 2024
3 Commits • 2 Features
Oct 1, 2024October 2024 for hiero-ledger/hiero-mirror-node focused on stabilizing operations, tightening data integrity, and enabling safer scaling of Citus-based deployments. Key deliverables include operational runbooks and automation scripts for Citus cluster management, a validation fix to enforce Hedera token IDs over EVM addresses, and a controlled maintenance approach via temporary disabling of automated backups using feature flags.
October 2024
3 Commits • 2 Features
Oct 1, 2024October 2024 for hiero-ledger/hiero-mirror-node focused on stabilizing operations, tightening data integrity, and enabling safer scaling of Citus-based deployments. Key deliverables include operational runbooks and automation scripts for Citus cluster management, a validation fix to enforce Hedera token IDs over EVM addresses, and a controlled maintenance approach via temporary disabling of automated backups using feature flags.
Activity
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Quality Metrics
Correctness88.6%
Maintainability86.0%
Architecture86.0%
Performance79.6%
AI Usage20.6%
Skills & Technologies
Programming Languages
BashJSONJavaJavaScriptKotlinMarkdownProtobufPseudoSQLShell
Technical Skills
API CachingAPI DesignAPI DevelopmentAPI IntegrationAPI TestingAcceptance TestingBackend DevelopmentBuild ConfigurationCI/CDCachingCitusCloud InfrastructureCode CleanupConfiguration ManagementContainerization
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