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hoangdohuy

PROFILE

Hoangdohuy

Worked on the mezonai/mmn and mmn-tx-explorer repositories, delivering core blockchain backend features, robust transaction APIs, and enhanced observability. Focused on distributed consensus, P2P networking, and secure transaction processing, the work included implementing Proof-of-History timekeeping, optimizing mempool concurrency, and strengthening block validation. Leveraged Go, SQL, and gRPC to build scalable APIs, improve nonce management, and ensure data integrity across multi-node deployments. Addressed security by hardening validation patterns and fixing SQL injection vulnerabilities, while also enhancing logging and monitoring for production reliability. Contributed to CI/CD automation, frontend improvements with React and TypeScript, and maintained clear documentation for maintainability and onboarding.

Overall Statistics

Feature vs Bugs

76%Features

Repository Contributions

84Total
Bugs
8
Commits
84
Features
25
Lines of code
12,900
Activity Months8

Work History

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026: Focused on improving observability for transaction processing in mezonai/mmn by delivering a gRPC server logging enhancement. Implemented transaction status event logging to improve traceability and error handling during transaction processing. This work is backed by commit 8cff595214d90c9b003b5f4730410f9e208f3c6e (Add log for event).

January 2026

2 Commits

Jan 1, 2026

Concise monthly summary for 2026-01 focusing on the mmn-tx-explorer project with two critical bug fixes that restored data integrity and API reliability.

December 2025

14 Commits • 4 Features

Dec 1, 2025

December 2025 performance summary for mezonai/mmn-tx-explorer. Focused on strengthening data integrity, improving user experience, and enhancing observability, while modernizing CI/CD and tooling for faster delivery. Summary highlights: - Key features delivered: improved offer management accuracy and cancellation flow; frontend currency formatting; profiling and monitoring enhancements; and CI/CD/tooling upgrades (Go version, migration naming, and environment/config improvements). - Major bugs fixed: database reliability and data integrity across transactions, SQL queries, and migrations; fixes addressing wallet creation risks and migration constraints. - Overall impact: reduced data risk, clearer financial UX, better production observability, and faster, safer release cycles. - Technologies/skills demonstrated: Go and SQL (transactions/migrations), performance profiling with pprof, dedicated monitoring endpoints, frontend UX improvements, and CI/CD automation and environment configuration.

November 2025

10 Commits • 4 Features

Nov 1, 2025

November 2025 focused on reliability, security, and data integrity across mezonai/mmn and mezonai/mmn-tx-explorer. Delivered a heartbeat mechanism for the transaction status stream to monitor active subscribers and improve fault detection; hardened security validation patterns to reduce injection risks; advanced wallet data handling and query-layer enhancements in mmn-tx-explorer, including sort validation and improved named-argument support; fixed a critical SQL injection vulnerability in the indexer by removing the events endpoint and adopting named parameters; and enhanced observability and stability with additional logging during DB synchronization and clarified error handling for block retrieval. These efforts improved system reliability, security posture, data accuracy, and operational visibility, supporting faster issue diagnosis and safer analytics.

October 2025

6 Commits • 3 Features

Oct 1, 2025

October 2025 (2025-10) – Mez on ai/mmn focused on reliability, security, and observability. Delivered key feature work and robustness improvements across single-node startup, genesis initialization, consensus validation, and runtime logging. These changes reduce operational risk, improve security posture, and enhance debugging and monitoring for production deployments.

September 2025

19 Commits • 4 Features

Sep 1, 2025

September 2025 monthly summary for mezonai/mmn focusing on delivering reliability, performance, and observability improvements across core components. The work emphasized safe concurrency, robust block storage and indexing, coherent nonce handling, synchronized initialization, and enhanced diagnostics. Overall, the month yielded higher throughput under concurrent load, faster block processing, reduced startup race conditions, and improved maintainability through clearer documentation and observability.

August 2025

12 Commits • 4 Features

Aug 1, 2025

August 2025 — Mezoni/mmn monthly summary focused on delivering business value through robust P2P networking, stable consensus and storage, improved nonce tracking, and enhanced public APIs. The work emphasizes reliability, performance, and developer-facing features that reduce operational risk and enable richer transaction insights.

July 2025

20 Commits • 5 Features

Jul 1, 2025

Concise monthly summary for 2025-07 focusing on key features delivered, major bugs fixed, impact, and technologies demonstrated. The month featured PoH-based consensus foundations, multi-node deployment readiness, expanded transaction APIs, robust testing infrastructure, and ongoing code quality improvements. Business value delivered includes reliable global ordering, faster deployment and testing across nodes, and improved maintainability.

Activity

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Quality Metrics

Correctness86.8%
Maintainability83.8%
Architecture81.2%
Performance79.2%
AI Usage22.6%

Skills & Technologies

Programming Languages

DockerfileGoJavaScriptProtocol BuffersSQLTypeScriptYAML

Technical Skills

API DevelopmentAPI IntegrationAPI developmentAPI integrationBackend DevelopmentBlockchainBlockchain DevelopmentBug FixingCI/CDCode RefactoringCommand-line Interface (CLI)ConcurrencyConcurrency ControlConfiguration ManagementConsensus Algorithms

Repositories Contributed To

2 repos

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

mezonai/mmn

Jul 2025 Feb 2026
6 Months active

Languages Used

DockerfileGoJavaScriptProtocol BuffersTypeScriptYAML

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentBlockchainBlockchain DevelopmentBug Fixing

mezonai/mmn-tx-explorer

Nov 2025 Jan 2026
3 Months active

Languages Used

GoSQLTypeScriptYAML

Technical Skills

API developmentGoPostgreSQLSQL scriptingbackend developmentconcurrency