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Artem Derevets

PROFILE

Artem Derevets

Over ten months, contributed to the hiero-ledger/hiero-consensus-node repository by building and refining core backend systems for blockchain consensus and fee management. Focused on modularizing fee calculation, enhancing configuration management, and improving test automation, the work included migrating to a simple fee model, implementing congestion pricing, and standardizing protocol buffer sources. Leveraged Java, Kotlin, and Protocol Buffers to deliver robust API development, error handling, and system design improvements. Addressed reliability through expanded test coverage, streamlined deployment processes, and strengthened observability. The engineering approach emphasized maintainability, upgradeability, and deployment safety, resulting in more predictable operations and lower maintenance overhead for the platform.

Overall Statistics

Feature vs Bugs

71%Features

Repository Contributions

70Total
Bugs
8
Commits
70
Features
20
Lines of code
39,833
Activity Months10

Work History

June 2026

23 Commits • 5 Features

Jun 1, 2026

June 2026: Delivered a set of architectural and reliability improvements to hiero-consensus-node, including migration to a simple fee model, enhanced startup resilience, and expanded observability. Implemented multi-jumpstart support, strengthened test coverage for LedgerIdPublication externalization, and completed extensive refactoring to remove legacy fee code across modules. Fixed critical correctness and observability bugs to improve data integrity and operator visibility, enabling more predictable deployments and lower maintenance costs.

May 2026

6 Commits • 3 Features

May 1, 2026

May 2026 outcomes for hiero-consensus-node: Delivered key features to improve UX and boot reliability, fixed config parsing robustness, and reduced JVM warnings to enhance startup stability. Highlights include Enhanced Upload Error Feedback, Automated Node Signing Key Generation, Robust Configuration Parsing for Unknown Fields, and JVM tuning to suppress warnings. Repo: hiero-ledger/hiero-consensus-node. Commits included: fa1d6789642f044d009ebff7558c783bc992d067; 0095d668a00d89a0fdd1994de65a453eac56ddf2; 7b4cc318e9be3570181d644f196d0a08a95faf97; 7f9526624be7ec7e9df348afc9aff0672d9716cd; e33060918ea53af61247296923f62de6cfed7a88; 01a03bc5cb87a72475527b1adc937e5a2c6e3e74.

April 2026

4 Commits • 2 Features

Apr 1, 2026

2026-04 Monthly Summary for hiero-consensus-node: Focused on improving live visibility, streaming reliability, and test stability. Delivered two features that unlock faster debugging and robust WRB streaming, and fixed a flaky test suite in the BlockNodeBackPressureSuite. Demonstrated strong proficiency in distributed streaming, GRPC-based item writing, test DSLs, and logging.

March 2026

5 Commits • 1 Features

Mar 1, 2026

March 2026: Focused on delivering business-value features and hardening the codebase in the hiero-consensus-node repository. Delivered flexible fee-exemption capability and completed substantial reliability improvements to tests and block validation, resulting in more predictable behavior, reduced risk of fee miscalculations, and stronger groundwork for upcoming feature work.

February 2026

15 Commits • 3 Features

Feb 1, 2026

February 2026 highlights for hiero-consensus-node: Delivered core fee-management enhancements, enhanced modularity, expanded test coverage, and a regression fix. The work improves fee predictability, upgradeability, and deployment safety while strengthening test reliability and code maintainability.

January 2026

5 Commits • 2 Features

Jan 1, 2026

January 2026 (2026-01) monthly summary for hiero-ledger/hiero-consensus-node focusing on delivering observable improvements, modular pricing, and robust testing to drive business value and deployment readiness.

December 2025

6 Commits • 1 Features

Dec 1, 2025

Monthly summary for 2025-12 focusing on delivering robust Hedera Crypto Fee handling and validation within hiero-consensus-node. Delivered Hedera Crypto Fee Structure Enhancements and Validation across CryptoTransfer, CryptoGetInfo, and CryptoGetAccountRecords. Introduced simple fee calculators, strengthened fee validation, and prevented double charging. Refactored tests to verify fee calculations across scenarios, increasing coverage for edge cases. Overall, this work improves pricing accuracy, reduces misbilling risk, and stabilizes fee-related behavior for production deployments.

November 2025

3 Commits • 1 Features

Nov 1, 2025

November 2025: Delivered a comprehensive Fee Calculation System Overhaul in hiero-consensus-node. Implemented a Crypto Update simple fees calculator, introduced hooks and key updates, and refactored architecture by replacing CalculatorState with FeeContext. Fixed issues in the simple fees test suite and updated tests to ensure accurate fee calculations across all transaction types. The work enhances fee accuracy, consistency, and maintainability, laying a scalable foundation for future fee-related features.

October 2025

2 Commits • 1 Features

Oct 1, 2025

October 2025: Focused on hardening the Hedera consensus node throttle path and closing a validation gap to improve reliability and throughput under load. Key contributions include throttle validation enhancements, a new ThrottleResult abstraction, and targeted tests for ScheduleCreate and TokenMint, which together reduce risk of unintended throttling and improve maintainability.

September 2025

1 Commits • 1 Features

Sep 1, 2025

In September 2025, the team delivered a key architectural improvement in the hiero-consensus-node by standardizing protobuf sources, laying groundwork for easier maintenance and more reliable cross-node communication.

Activity

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Quality Metrics

Correctness95.0%
Maintainability87.6%
Architecture90.4%
Performance87.0%
AI Usage24.4%

Skills & Technologies

Programming Languages

JSONJavaKotlinProtoBufShellYAMLprotobuf

Technical Skills

API DevelopmentAPI designAPI developmentAPI testingBDDBackend DevelopmentBlockchain DevelopmentBuild System ConfigurationConfiguration ManagementDependency ManagementDevOpsDockerError HandlingGradleHedera services

Repositories Contributed To

1 repo

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

hiero-ledger/hiero-consensus-node

Sep 2025 Jun 2026
10 Months active

Languages Used

KotlinprotobufJavaJSONProtoBufShellYAML

Technical Skills

Build System ConfigurationDependency ManagementProtocol BuffersAPI DevelopmentBackend DevelopmentError Handling