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jasuwienas

PROFILE

Jasuwienas

Over three months, Jasuwienas developed and enhanced backend infrastructure for the hiero-json-rpc-relay repository, focusing on reliability, security, and automation. He modernized the cache system, upgraded the server framework to Koa 3, and implemented robust JSON-RPC API security controls using TypeScript and Node.js. Jasuwienas introduced synthetic transaction support, refactored Ethereum RPC handling, and improved error propagation for better observability. He also contributed to hashgraph/hedera-smart-contracts by automating daily ERC registry indexing with GitHub Actions and YAML workflows. His work demonstrated depth in backend development, cache management, and CI/CD, resulting in more predictable deployments and scalable, secure transaction processing systems.

Overall Statistics

Feature vs Bugs

92%Features

Repository Contributions

21Total
Bugs
1
Commits
21
Features
11
Lines of code
5,488
Activity Months3

Work History

February 2026

6 Commits • 2 Features

Feb 1, 2026

February 2026 monthly summary for cross-repo development focusing on security, automation, and reliability. Key features delivered across two projects, major bug fixes to improve stability, and demonstrated expertise in security controls, automation, and CI/CD improvements.

January 2026

9 Commits • 5 Features

Jan 1, 2026

January 2026 focused on reliability, performance, and developer experience for hiero-json-rpc-relay. Implemented synthetic transactions, robust tracing, streamlined gas price handling, and a dedicated Ethereum RPC service, while also hardening error handling, observability, and caching. These changes reduce unnecessary balance checks, improve user feedback, and establish a scalable foundation for Ethereum RPC integrations and transaction processing.

December 2025

6 Commits • 4 Features

Dec 1, 2025

December 2025 monthly work summary focusing on delivering core reliability, security, and performance improvements for hiero-json-rpc-relay. Key changes include a Cache System Modernization with a cache factory and unified client interface, a Server Framework Upgrade to Koa 3, JSON-RPC API accessibility/security enhancements (transaction access validation, restricted CORS to GET/POST, configurable HTTP JSON-RPC responses), and Test Stabilization efforts to improve acceptance test reliability by tuning wait times and cost tolerance. These initiatives reduce operational risk, improve response consistency, and position the service for scalable growth. Technologies used include Node.js, Koa 3, and modern caching patterns; demonstrated strong collaboration, code quality, and security posture.

Activity

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Quality Metrics

Correctness90.6%
Maintainability82.8%
Architecture82.8%
Performance82.8%
AI Usage28.6%

Skills & Technologies

Programming Languages

JSONJavaScriptTypeScriptYAML

Technical Skills

API DevelopmentAPI developmentCI/CDContinuous IntegrationDevOpsEthereumGitHub ActionsJSON-RPCKoaNode.jsTestingTypeScriptWeb DevelopmentWorkflow Automationbackend development

Repositories Contributed To

2 repos

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

hiero-ledger/hiero-json-rpc-relay

Dec 2025 Feb 2026
3 Months active

Languages Used

JSONJavaScriptTypeScriptYAML

Technical Skills

API DevelopmentAPI developmentKoaNode.jsTestingTypeScript

hashgraph/hedera-smart-contracts

Feb 2026 Feb 2026
1 Month active

Languages Used

YAML

Technical Skills

CI/CDContinuous IntegrationDevOpsGitHub ActionsWorkflow Automation