Jeison – React, Typescript, Python

B2B inventory management platform that enables brokers to list, manage, broadcast, and report on ticket inventory across multiple third-party marketplaces.

• Ported complete features from AngularJS to a modern React architecture following best practices, maintaining full parity with the original application while enhancing the user experience through a more modern and intuitive UI;
• Implemented new features with pixel-perfect accuracy based on Figma designs, meeting ticket specifications and following established codebase patterns;
• Refactored complex legacy code by breaking it into smaller components, extracting logic into custom hooks, and reusing existing components to reduce duplication;
• Wrote unit and integration tests for each new feature, maintaining 80%+ code coverage;
• Reviewed coworkers' pull requests, providing constructive feedback and suggesting improvements where appropriate.

A React Native mobile app for iOS and Android that gives subscribers on-the-go access to IPD Analytics' research and media content, including articles, podcasts, and rich media, with personalized notifications and preference management.

• Designed and implemented REST API endpoints in NestJS for the mobile app, covering content types, products, regions, users, podcasts, and articles;
• Built admin endpoints for full entity management, including media uploads;
• Added role-based access guards and Supabase OTP authentication to harden API security;
• Wrote comprehensive test coverage for all implemented endpoints;
• Transitioned to Tech Lead to drive the project toward release. Reviewed mobile PRs, provided structured feedback, and coordinated backend changes in response to mobile team needs;
• Debugged cross-platform issues, including push notification failures.

Live streaming platform connecting creators and audiences through real-time streams, chat, and a custom in-platform currency, taken from a half-finished state to production quality.

• Implemented and repaired core platform features including real-time streaming, live chat, and the custom currency purchase flow;
• Fixed and completed the social features, such as following creators and discovery flows;
• Refactored the existing codebase to align with modern best practices and improve maintainability;
• Added responsive support for smartphone viewports across the web application.

Full redesign of the public website for a financial brokerage and media company focused on options trading, migrating from a legacy implementation to a modernized architecture with Contentstack CMS, inherited mid-flight with an unstable foundation.

• Implemented the website redesign across the full stack. New UI components, updated styles, and React architecture aligned with the new design system;
• Configured and extended Contentstack, creating and updating content models, migrating approximately 30 content types, and resolving structural issues;
• Diagnosed and fixed foundational problems introduced during the initial migration that surfaced during active development;
• Promoted to Tech Lead mid-project. Continued hands-on development while taking on PR reviews, feedback sessions with two engineers, and regular velocity and status communication with the PM.

MVP platform for managing critical medical asset visibility across hospital facilities, providing clinical engineering managers with real-time insight into equipment downtime, service events, and resource coordination for high-value imaging devices — evolved into a full web application embedded within the client's existing platform.

• Defined the tech stack, coding standards, design patterns, and component architecture for the project;
• Broke Figma designs into screens and reusable components, including complex forms built with React Hook Form;
• Implemented the global state management strategy using Zustand;
• Implemented the API data-fetching strategy using React Query;
• Coordinated with the client's engineering team to align on endpoint contracts, schemas, and response structures;
• Matched the client's existing UI shell (side nav, top header) to ensure seamless embedding within their platform;
• Reviewed PRs and provided feedback for a growing team of up to 3 developers.