hiero-ledger/hiero-mirror-node
Jan 2025 – Jul 2025
7 Months active
Languages Used
KotlinGradleJavaGherkinSQLYAMLProtoSolidity
Technical Skills
Build Script DevelopmentCI/CD ConfigurationBackend DevelopmentHederaJavaKotlin
filev94
PROFILE
Filev94
Todor Filev contributed to the hiero-ledger/hiero-mirror-node repository by engineering features and fixes that enhanced reliability, observability, and scalability across distributed systems. He developed API endpoint usage tracking and reporting, refactored the Web3 persistence layer, and improved error handling for modular transactions. Using Java, Kotlin, and Protocol Buffers, Todor modernized proto structures, centralized state management, and expanded test coverage for smart contracts and system migrations. His work included optimizing CI/CD pipelines, tuning gas configurations, and instrumenting code for detailed metrics. These efforts resulted in more robust deployments, data-driven performance tuning, and improved test reliability for Hedera-based applications.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
28Total
Bugs
7
Commits
28
Features
16
Lines of code
14,151
Activity Months7
Your Network
47 people
Work History
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025: Delivered API Endpoint Usage Tracking and Reporting for hiero-ledger/hiero-mirror-node. Implemented per-endpoint database table usage tracking during test runs with Markdown and CSV reports for REST, GraphQL, and gRPC. The work includes a Java-based reporting module and artifacts captured in commit 71e073ef72f12fdd23cdb85d23648f3bc4c05e26. This enhances test telemetry, enables data-driven optimization, and improves visibility into resource usage.
1 Commits • 1 Features
Jul 1, 2025July 2025: Delivered API Endpoint Usage Tracking and Reporting for hiero-ledger/hiero-mirror-node. Implemented per-endpoint database table usage tracking during test runs with Markdown and CSV reports for REST, GraphQL, and gRPC. The work includes a Java-based reporting module and artifacts captured in commit 71e073ef72f12fdd23cdb85d23648f3bc4c05e26. This enhances test telemetry, enables data-driven optimization, and improves visibility into resource usage.
July 2025
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for hiero-mirror-node focused on reliability, observability, and performance alignment with mainnet usage. Delivered three key outcomes: improved error visibility in Web3 transactions, stabilized acceptance tests for Hedera-to-EVM address handling, and gas configuration tuning to reflect real-world usage and prevent abuse. These workstreams reduced production risk, increased test reliability, and optimized gas economics.
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for hiero-mirror-node focused on reliability, observability, and performance alignment with mainnet usage. Delivered three key outcomes: improved error visibility in Web3 transactions, stabilized acceptance tests for Hedera-to-EVM address handling, and gas configuration tuning to reflect real-world usage and prevent abuse. These workstreams reduced production risk, increased test reliability, and optimized gas economics.
May 2025
6 Commits • 4 Features
May 1, 2025May 2025 monthly summary for hiero-ledger/hiero-mirror-node. Delivered core features, stability improvements, and expanded test coverage that improve data integrity, contract reliability, and state management. The month focused on hardening ingestion, extending contract/test suites, and simplifying state handling to reduce operational risk and enable scalable growth.
6 Commits • 4 Features
May 1, 2025May 2025 monthly summary for hiero-ledger/hiero-mirror-node. Delivered core features, stability improvements, and expanded test coverage that improve data integrity, contract reliability, and state management. The month focused on hardening ingestion, extending contract/test suites, and simplifying state handling to reduce operational risk and enable scalable growth.
May 2025
April 2025
6 Commits • 4 Features
Apr 1, 2025Concise monthly summary for 2025-04 focusing on key features delivered, major bug fixes, and business impact. Deliveries in hiero-mirror-node improved compatibility, observability, and test coverage, enabling safer migrations and more reliable modular deployments.
April 2025
6 Commits • 4 Features
Apr 1, 2025Concise monthly summary for 2025-04 focusing on key features delivered, major bug fixes, and business impact. Deliveries in hiero-mirror-node improved compatibility, observability, and test coverage, enabling safer migrations and more reliable modular deployments.
March 2025
5 Commits • 3 Features
Mar 1, 2025March 2025 highlights for hiero-mirror-node: Delivered targeted Web3 persistence layer refactor and test consolidation, added configurable traffic management for modularized EVM services, and implemented shard/realm-aware configuration to support distributed networks. Fixed critical precompile acceptance test issues to improve determinism and parity between new and legacy paths. These changes reduce maintenance burden, improve reliability, and enable scalable deployment of Web3 features.
5 Commits • 3 Features
Mar 1, 2025March 2025 highlights for hiero-mirror-node: Delivered targeted Web3 persistence layer refactor and test consolidation, added configurable traffic management for modularized EVM services, and implemented shard/realm-aware configuration to support distributed networks. Fixed critical precompile acceptance test issues to improve determinism and parity between new and legacy paths. These changes reduce maintenance burden, improve reliability, and enable scalable deployment of Web3 features.
March 2025
February 2025
6 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for hiero-mirror-node focusing on delivered features and improvements across the Hedera Mirror Node importer and Web3 test framework.
February 2025
6 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for hiero-mirror-node focusing on delivered features and improvements across the Hedera Mirror Node importer and Web3 test framework.
January 2025
1 Commits
Jan 1, 2025January 2025 monthly summary focused on stabilizing the CI pipeline for hiero-mirror-node, implementing a targeted bug fix to disable test retries in CI unless web3 and modularized services are present. This reduces flaky tests and shortens CI cycles, delivering faster feedback and lower compute costs. Commit involved: 834a29e3eb446f52e220d9a9e8ed19edd2b97acb.
1 Commits
Jan 1, 2025January 2025 monthly summary focused on stabilizing the CI pipeline for hiero-mirror-node, implementing a targeted bug fix to disable test retries in CI unless web3 and modularized services are present. This reduces flaky tests and shortens CI cycles, delivering faster feedback and lower compute costs. Commit involved: 834a29e3eb446f52e220d9a9e8ed19edd2b97acb.
January 2025
Activity
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Quality Metrics
Correctness89.2%
Maintainability87.6%
Architecture84.2%
Performance77.6%
AI Usage20.8%
Skills & Technologies
Programming Languages
GherkinGradleGroovyJavaKotlinMarkdownProtoSQLSolidityYAML
Technical Skills
API IntegrationBackend DevelopmentBuild AutomationBuild Script DevelopmentCI/CDCI/CD ConfigurationCode InstrumentationConfiguration ManagementDatabase ManagementDatabase MigrationDevOpsEVMError HandlingGherkinHedera
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