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Jonhatan Corona

PROFILE

Jonhatan Corona

Jonhatan Corona developed robust backend features for the SwaplyAr-Backend-02 repository, focusing on secure financial account management and transaction workflows. Over two months, he delivered role-based access controls, comprehensive DTO validation, and modernized the financial data model to improve data integrity and reliability. Using TypeScript, NestJS, and SQL, Jonhatan implemented end-to-end transaction creation with enhanced error handling, OTP-protected notes, and privacy-conscious status updates. He also introduced scalable pagination patterns and resilient email notification systems with Handlebars templating. His work demonstrated depth in API design, backend architecture, and testing, resulting in faster, more secure, and maintainable user and admin experiences.

Overall Statistics

Feature vs Bugs

71%Features

Repository Contributions

29Total
Bugs
4
Commits
29
Features
10
Lines of code
5,893
Activity Months2

Work History

August 2025

14 Commits • 6 Features

Aug 1, 2025

Aug 2025 performance summary for Swaplyar Backend (SwaplyAr-Backend-02): Delivered security-conscious, scalable transaction workflows and a modernized financial data model, driving reliability and faster user workflows. Key features delivered include a public status history API secured by sender's last name with new DTOs/interfaces and exposed public data; an end-to-end transaction creation flow with robust validation and improved error handling, including optional message support; enhanced transaction history retrieval with pagination and enriched payment-method details; a modernization of financial services data via a unified PaymentMethod model with DTO refactors; and email notification improvements with reliable template resolution and the introduction of a review-payment template. Notable reliability and security improvements include OTP-protected notes for transactions and privacy hardening for status updates, alongside pagination for verification lists. Overall impact: improved data integrity, reduced error rates, faster and more secure transaction processing, and a better customer experience. Technologies demonstrated: REST API design, DTOs/interfaces, data-model refactoring, DB schema improvements, pagination patterns, robust validation and error handling, OTP-based security, resilient email templating, and privacy-conscious data exposure.

July 2025

15 Commits • 4 Features

Jul 1, 2025

July 2025 monthly summary for SwaplyAr-Backend-02. Focused on strengthening security, data integrity, API reliability, and developer experience through feature delivery, bug fixes, and comprehensive testing. Delivered an expanded set of financial accounts controls, improved user verification workflows, and robust validation with solid documentation and tests.

Activity

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Quality Metrics

Correctness86.2%
Maintainability83.2%
Architecture81.4%
Performance78.6%
AI Usage25.6%

Skills & Technologies

Programming Languages

HTMLJavaScriptSQLTypeScript

Technical Skills

API DesignAPI DevelopmentAPI SecurityAdmin PanelAuthenticationBackend DevelopmentClass-validatorCloudinary IntegrationDTO DesignDTO ValidationDTOsData ValidationDatabase DesignDatabase ManagementEmail Services

Repositories Contributed To

1 repo

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

SwaplyarDev/SwaplyAr-Backend-02

Jul 2025 Aug 2025
2 Months active

Languages Used

JavaScriptTypeScriptHTMLSQL

Technical Skills

API DesignAPI DevelopmentAPI SecurityAdmin PanelBackend DevelopmentClass-validator