Oscar Cervantes

Experience

• 

  Excorp Tecnologías de la Información

  Oct 2016 - Oct 2017

  Software Engineer

  • Created and maintained Excorp's website with HTML5, CSS3, and JavaScript.

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  McCann Health Sistemas Integrales | An IPG Health Associate Company

  Jun 2018 - Oct 2019

  Software Engineer

  • Development of “OnaBoNT”, Allergan’s mobile app for showing Botox medical information and correct application points to all their Healthcare Providers Network via interactive 3D human body models, with Unity3D, C#, and Firebase.• Created a QR attendees tracking app to correctly send medical conference attendance certificates with React, Firebase, and SendGrid.

• 

  DatalabMx

  Oct 2019 - Feb 2020

  Software Engineer

  • Led the creation of “Viralidad”, a private app for Mexico City’s Head of Government to keep track of Mexico City’s most sensitive daily and weekly news, segmented by each one of the neighborhoods in the city with Ionic 4, TypeScript, and OneSignal.• Development of the REST API and scripts to load the news into our system with Flask, Python3, SQLAlchemy, and JWT.

• 

  Omnitracs, LLC

  Feb 2020 - Nov 2020

  Software Engineer

  • Redesigned “Sylectus Driver”, a geolocation tracking, transportation management, and communications app for 1+ million truck drivers between the U.S. and Canada with React Native, TypeScript, and Firebase Cloud Messaging.• Redoing business logic so the Sylectus Ecosystem could communicate correctly with the new ASP.NET, C#, and MySQL app.

• 

  Globant

  Nov 2020 - May 2021

  Senior Software Engineer

  • Created and delivered the core of the fintech app “Billet”, a Dominican Republic digital wallet that simplified and improved Dominican's C2C and C2B payments and banking experience by 75% with React Native, TypeScript, and Jest.• Built a CRM so Billet admins could dynamically show/hide the profile and the setting menus in the app with React, TypeScript, and Jest.

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  OfferUp

  May 2021 - Oct 2024

  • Created architecture and led end-to-end development of 20+ multivariate and multi-page A/B tests for Local Events, Local News, and Daily Streaks resulting in a 5% increase of daily active users with React Native, Statsig, and Jest.• Improvement of “Promoted Products” and creation of “Premium” verticals via Free Trials, resulting in revenue growth of 50% and the first time the company became profitable with React Native, GraphQL, Node.js, Objective-C, Java, and Jest.• Modularized all paywall-related components in the app, going from 0% to 100% test coverage and thus reducing overall bugs caught during regression by 1%, and also letting other teams easily create their paywalls, with React Native and Jest.• Collaborated in the new initiative “First Time User Experience”, letting new users experience the app much cleaner without takeovers, ads, and banners, among other flow disruptions; resulting in an 8% user retention increase.• Led Premium discounts for former subscribers which resulted in ~2% increase in conversion rate, using Objective-C and Java.• Improved the way users could contact dealerships when posting their vehicles for OfferUp’s app and websites with Next.js, React Native, TypeScript, Jest, and Optimizely.• On-call duties with Datadog, PagerDuty, and Firebase Analytics. Show less

  • Senior Software Engineer

    May 2022 - Oct 2024

  • Software Engineer

    May 2021 - May 2022
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  Capital One

  Oct 2024 - now

  Senior Software Engineering

  • Spearheaded migration of Holds Services resulting in decoupled modern bank systems that respond faster to end clients from Django to Golang and Docker in AWS, ECS.• Worked on the improvement of the core systems for communicating better with third parties, targeting the modernization of the third-party implementations in 1 month for the planning of 1.5 months in Python, ECS, and Lambdas.• Collaborated with at least 8 external teams in the correct integration and testing for the core systems updates, making sure both policies and network communications were correctly applied.• Created documentation for the new Hold services for both QA and Prod, as well as centralized all docs and resources for external teams.• Setup of monitors in New Relic, and alerts setup in PagerDuty for the correct insight of the holds and core services. Show less