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Carlos Miceli

PROFILE

Carlos Miceli

Over a seven-month period, this developer contributed to Expensify and related repositories by building and refining features across backend and frontend systems. They implemented robust API endpoints, such as the SMS Delivery Failure Status Reset API in expensify-common, emphasizing parameter validation and command-pattern integration using TypeScript and JavaScript. Their work in Expensify-App and k2-extension included UI enhancements, localization streamlining, and template system refactoring to improve maintainability and user experience. They also addressed reliability by expanding SQL logging in Bedrock and strengthening test coverage. Throughout, they focused on input validation, internationalization, and consistent testing practices to enhance product stability.

Overall Statistics

Feature vs Bugs

61%Features

Repository Contributions

50Total
Bugs
7
Commits
50
Features
11
Lines of code
2,362
Activity Months7

Work History

March 2026

2 Commits

Mar 1, 2026

March 2026 focused on stabilizing Expensify-App by reverting two unstable changes: the infinite spinner fix for new card assignment and the card feed refresh on-demand feature. This work preserved core card-management flows, reduced UI regressions, and improved release readiness.

February 2026

9 Commits • 2 Features

Feb 1, 2026

February 2026 monthly summary for callstack-internal/Expensify-App: Focused on authentication reliability, cross-feed data integrity, and consistent input validation. Delivered structured improvements that reduce friction for users and increase data trust across feeds.

January 2026

15 Commits • 5 Features

Jan 1, 2026

Month: 2026-01 — Consolidated UI/UX improvements, localization hardening, flow simplifications, and reliability enhancements across two Expensify repos. Delivered user-facing features, stabilized interactions, and reduced maintenance burden while keeping a strong focus on business value and quality.

October 2025

1 Commits • 1 Features

Oct 1, 2025

Oct 2025 monthly summary focusing on key accomplishments and business impact for margelo/expensify-app-fork. Key feature delivered: simplified empty-state messaging for Reports by removing the 'emptyStateSubtitle' translation key across multiple language files to align UI messaging with the streamlined expenses flow. No major bugs fixed documented this month. Overall impact: improved UI clarity, reduced localization surface area, and better alignment between reports and the expenses workflow, enabling faster user decision-making and simpler maintenance.

September 2025

7 Commits

Sep 1, 2025

September 2025 monthly work summary focusing on reliability improvements, diagnostics, and test-driven validation across Bedrock and the expensify-app-fork repository. Delivered targeted fixes with clear business impact and strengthened notification logic.

July 2025

15 Commits • 2 Features

Jul 1, 2025

Month: 2025-07 — Expensify/k2-extension delivered two major template-based enhancements focused on improve engineering communications, reliability, and maintainability. The work delivers business value by standardizing updates, reducing manual editing, and speeding team-wide information sharing while preparing the codebase for future KSv2 adoption.

December 2024

1 Commits • 1 Features

Dec 1, 2024

Month 2024-12: Focused on extending SMS delivery tooling in Expensify/expensify-common. Key delivery: implemented the SMS Delivery Failure Status Reset API (a new POST command to reset the SMS delivery failure status for a given phone number) with robust parameter validation, improving recovery workflows and reducing manual interventions. No major bug fixes were documented for this repository this month. Overall impact: Enhanced reliability of SMS delivery state management, enabling automated recovery and better customer communications. Technologies/skills demonstrated: API design (REST/POST), parameter validation, command-pattern integration, commit traceability, and strong attention to input validation.

Activity

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Quality Metrics

Correctness93.6%
Maintainability93.2%
Architecture89.6%
Performance91.2%
AI Usage20.4%

Skills & Technologies

Programming Languages

C++JavaScriptMarkdownTypeScript

Technical Skills

API DevelopmentBackend DevelopmentDatabase ManagementDocumentationFront End DevelopmentInternationalizationJavaScriptJestLoggingReactRefactoringSQLTypeScriptUnit Testingfront end development

Repositories Contributed To

6 repos

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

callstack-internal/Expensify-App

Jan 2026 Mar 2026
3 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

JestReactTypeScriptfront end developmenttestingsoftware testing

Expensify/k2-extension

Jul 2025 Jul 2025
1 Month active

Languages Used

JavaScriptMarkdown

Technical Skills

DocumentationFront End DevelopmentJavaScriptReactRefactoring

margelo/expensify-app-fork

Sep 2025 Oct 2025
2 Months active

Languages Used

TypeScript

Technical Skills

JavaScriptUnit TestingInternationalization

Expensify/App

Jan 2026 Jan 2026
1 Month active

Languages Used

TypeScript

Technical Skills

ReactTypeScriptfront end developmenti18nlocalization

Expensify/expensify-common

Dec 2024 Dec 2024
1 Month active

Languages Used

JavaScript

Technical Skills

API DevelopmentBackend Development

Expensify/Bedrock

Sep 2025 Sep 2025
1 Month active

Languages Used

C++

Technical Skills

Database ManagementLoggingSQL