hiero-ledger/hiero-mirror-node
Oct 2024 – Apr 2026
18 Months active
Languages Used
BashJSONJavaScriptMarkdownYAMLJavabashjavascript
Technical Skills
API DevelopmentBackend DevelopmentCitusConfiguration ManagementDevOpsGCP
Jesse Nelson
PROFILE
Jesse Nelson
Jesse Nelson contributed to the hiero-ledger/hiero-mirror-node repository by engineering robust backend systems that improved data integrity, scalability, and deployment reliability. Over 18 months, Jesse delivered features such as REST API caching, partitioned database storage, and automated cluster management, leveraging Java, Go, and Kubernetes. He implemented resilient migration scripts, enhanced monitoring with Prometheus, and enabled native image builds for core microservices. His work included optimizing SQL queries, refining CI/CD pipelines, and expanding test coverage for complex scenarios like batch transactions and non-zero shard/realm configurations. Jesse’s technical depth ensured production-grade reliability and maintainability across distributed systems and cloud-native deployments.
Overall Statistics
Feature vs Bugs
82%Features
Repository Contributions
79Total
Bugs
10
Commits
79
Features
46
Lines of code
36,202
Activity Months18
Your Network
54 peopleSame Organization
@swirldslabs.com33
Work History
April 2026
1 Commits • 1 Features
Apr 1, 2026Monthly work summary for 2026-04 focusing on the hiero-mirror-node repository. Delivered native image build support for core components, added runtime hints, and streamlined configuration by removing proxies and @ConditionalOnProperty usage. All changes were implemented in a cohesive commit set to enable GraalVM native-image builds across grpc, importer, rest-java, and web3.
1 Commits • 1 Features
Apr 1, 2026Monthly work summary for 2026-04 focusing on the hiero-mirror-node repository. Delivered native image build support for core components, added runtime hints, and streamlined configuration by removing proxies and @ConditionalOnProperty usage. All changes were implemented in a cohesive commit set to enable GraalVM native-image builds across grpc, importer, rest-java, and web3.
April 2026
March 2026
3 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for hiero-ledger/hiero-mirror-node focused on delivering a scalable monitoring solution and strengthening data integrity. Key features delivered include a new Pinger Monitoring System that replaces the solo monitor and ships with a Helm chart for automated deployment, along with an upgrade of Rosetta to Go 1.26 to boost performance and compatibility. Centralized configuration for the pinger is provided via values.yaml to simplify operations. Additionally, a Record File Primary Key Migration updates the primary key to consensus_end to improve data integrity and query performance for record files. Together, these changes reduce operational risk, enable scalable deployments, and strengthen the data layer, aligning with reliability and performance goals. Top 3-5 achievements: - Replaced solo monitor with Pinger Monitoring System and added Helm chart for deployment (commits e218c68bf81dda140da0bcd1afda796b4aa1cb54; 8dd323a5d780e624be1b16ad472e6c33740ca740). - Upgraded Rosetta to Go 1.26 to improve performance and compatibility. - Centralized pinger configuration via values.yaml for streamlined operations. - Implemented Record File Primary Key migration to consensus_end to enhance data integrity and query performance (commit 68d1600d4f5bbe59fe7b8a6202ce543f055eb24e). - Improved deployment reliability and maintainability through Helm-based tooling and Go modules.
March 2026
3 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for hiero-ledger/hiero-mirror-node focused on delivering a scalable monitoring solution and strengthening data integrity. Key features delivered include a new Pinger Monitoring System that replaces the solo monitor and ships with a Helm chart for automated deployment, along with an upgrade of Rosetta to Go 1.26 to boost performance and compatibility. Centralized configuration for the pinger is provided via values.yaml to simplify operations. Additionally, a Record File Primary Key Migration updates the primary key to consensus_end to improve data integrity and query performance for record files. Together, these changes reduce operational risk, enable scalable deployments, and strengthen the data layer, aligning with reliability and performance goals. Top 3-5 achievements: - Replaced solo monitor with Pinger Monitoring System and added Helm chart for deployment (commits e218c68bf81dda140da0bcd1afda796b4aa1cb54; 8dd323a5d780e624be1b16ad472e6c33740ca740). - Upgraded Rosetta to Go 1.26 to improve performance and compatibility. - Centralized pinger configuration via values.yaml for streamlined operations. - Implemented Record File Primary Key migration to consensus_end to enhance data integrity and query performance (commit 68d1600d4f5bbe59fe7b8a6202ce543f055eb24e). - Improved deployment reliability and maintainability through Helm-based tooling and Go modules.
February 2026
4 Commits • 3 Features
Feb 1, 2026February 2026 milestones for hiero-mirror-node (repo: hiero-ledger/hiero-mirror-node). Focused on delivering three major features, addressing critical reliability and observability bugs, and expanding test coverage. Key outcomes include: improved testnet bootstrap reliability, enhanced cross-cluster observability, and expanded QA coverage for batch operations, delivering tangible business value through faster initialization, proactive health signals, and robust batch processing validation.
4 Commits • 3 Features
Feb 1, 2026February 2026 milestones for hiero-mirror-node (repo: hiero-ledger/hiero-mirror-node). Focused on delivering three major features, addressing critical reliability and observability bugs, and expanding test coverage. Key outcomes include: improved testnet bootstrap reliability, enhanced cross-cluster observability, and expanded QA coverage for batch operations, delivering tangible business value through faster initialization, proactive health signals, and robust batch processing validation.
February 2026
January 2026
4 Commits • 2 Features
Jan 1, 2026January 2026 monthly summary for hiero-mirror-node focusing on storage efficiency, reliability, and transaction correctness. Key deliverables include an auto-grow feature for ZFS volumes, Stackgres operator upgrades with failsafe mode and Citus extension updates, and batch key formatting standardization in transaction specs. These changes reduce operational toil, improve resource utilization, and strengthen system stability, delivering tangible business value in storage management, database orchestration, and transaction reliability.
January 2026
4 Commits • 2 Features
Jan 1, 2026January 2026 monthly summary for hiero-mirror-node focusing on storage efficiency, reliability, and transaction correctness. Key deliverables include an auto-grow feature for ZFS volumes, Stackgres operator upgrades with failsafe mode and Citus extension updates, and batch key formatting standardization in transaction specs. These changes reduce operational toil, improve resource utilization, and strengthen system stability, delivering tangible business value in storage management, database orchestration, and transaction reliability.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for hiero-ledger/hiero-mirror-node: Delivered a testing environment enhancement to strengthen acceptance tests by increasing the default initial balance for test accounts from 75 million to 100 million, improving the realism of simulations and reducing flaky test outcomes. The change is tracked under commit a13e33135bf3d6955e2617dab326bee6f60d6229 and signed off by Jesse Nelson. No other major bugs fixed were recorded in this scope.
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for hiero-ledger/hiero-mirror-node: Delivered a testing environment enhancement to strengthen acceptance tests by increasing the default initial balance for test accounts from 75 million to 100 million, improving the realism of simulations and reducing flaky test outcomes. The change is tracked under commit a13e33135bf3d6955e2617dab326bee6f60d6229 and signed off by Jesse Nelson. No other major bugs fixed were recorded in this scope.
December 2025
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025 performance-focused month for hiero-mirror-node. Key work includes delivering LambdaSStore Transactions Support with new fields and logic in HookStorage/HookStorageChange, plus a dedicated LambdaSStore transaction handler to improve ledger functionality. Enhanced live environment deployment tooling with Helm test verification and resource cleanup to boost deployment reliability and resource management. Fixed a typo in the cluster management script used for acceptance pod cleanup to ensure reliable cluster maintenance. These changes advance ledger functionality, reduce deployment risk, and optimize resource usage across environments.
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025 performance-focused month for hiero-mirror-node. Key work includes delivering LambdaSStore Transactions Support with new fields and logic in HookStorage/HookStorageChange, plus a dedicated LambdaSStore transaction handler to improve ledger functionality. Enhanced live environment deployment tooling with Helm test verification and resource cleanup to boost deployment reliability and resource management. Fixed a typo in the cluster management script used for acceptance pod cleanup to ensure reliable cluster maintenance. These changes advance ledger functionality, reduce deployment risk, and optimize resource usage across environments.
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.
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Quality Metrics
Correctness89.8%
Maintainability86.2%
Architecture87.6%
Performance81.4%
AI Usage22.0%
Skills & Technologies
Programming Languages
BashGoJSONJavaJavaScriptKotlinMarkdownProtobufPseudoSQL
Technical Skills
API CachingAPI DesignAPI DevelopmentAPI IntegrationAPI TestingAPI developmentAPI integrationAcceptance TestingBackend DevelopmentBuild ConfigurationCI/CDCachingCitusCloud InfrastructureCode Cleanup
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