# Guillermo Lopez Chavez > Senior Software Engineer at MCR Location: New York, New York, United States Profile: https://flows.cv/guillermolopezchavez Innovative Senior Software Engineer with 9 years of experience designing, developing, and deploying software solutions, web applications, and features. Well-versed in the full software development lifecycle, technical design, writing and optimizing code, tests, and developing dynamic user experiences. Expert in managing software engineering projects for the roll out of order replacement systems, voucher programs, booking engine modules, and sign on solutions. ## Work Experience ### Senior Software Engineer @ MCR Hotels Jan 2023 – Present | New York City Metropolitan Area Designing, building, and implementing software solutions and features. • Developed mail inventory application resulting in a 30% reduction in inventory tracking and management time and significantly enhancing operational efficiency. • Spearheaded the creation of a labor time tracking application, streamlining operations for 141 hotels and 7,000 employees. This led to a 10% decrease in overtime costs. • Engineered and deployed a room status tracking system that automated out-of-order room reporting across the hotel network, reducing daily out-of-order rooms by 36%. ### Senior Software Engineer @ Drizly Jan 2021 – Jan 2023 | New York, United States Engineer, develop, and deploy software solutions, systems, and features, including gathering requirements, writing applications, system architecture definition, testing, and implementing solutions. Lead the development of bulk order creation and processing for corporate clients along with self-service tools allowing bulk creation of stores. • Increased customer return rate 20% and replacement order rate 10% by leading the design and development of an order replacement feature that allowed the customer experience team to replace orders for out-of-stock items. • Generated $250k in additional revenue by leading the design and development of a feature to support voucher programs such that companies could gift staff promo codes for shopping on the platform. • Enabled the onboarding of a retailer with 5,000 US locations by developing new features for creating and updating retailer information such as location, service areas, and hours. • Coordinated response to botnet attack and other site wide outages as a volunteer SRE and worked with volunteers to create organization-wide new services SRE checklist. • Migrated retailer functionality from rails application to single page application using React, GraphQL, and Apollo Federation. Enhanced store service level functionality to allow automated creation of delivery polygons. ### Senior Software Engineer @ NextGuest Jan 2018 – Jan 2021 | New York, New York • Reduced hosting costs 30% by rewriting the module of a booking engine within a content manage system (CMS) as a separate application, moving from EC2 instances to containers, and creating a new hosting architecture. • Boosted repeat visitors 20% by using Auth0 in designing and rolling out a single sign on solution for a client hosting a loyalty portal, booking engine, and website on different subdomains. • Streamlined code deployment and configuration of new environments by building a CLI tool to provision new hosting environments on AWS. • Spearheaded the development of web application rendering near real-time analytics data for client portfolio and launched multiple loyalty portals for high end luxury hotel brands. ### Application Programmer @ NextGuest Jan 2015 – Jan 2018 | New York, New York, United States • Produced $90M in yearly revenue for a client by creating a booking engine module within a Content Management System (CMS) for end users to be able to book hotel rooms directly on the CMS. • Delivered real time content personalization within CMS application by developing and introducing personalization and targeting microservice. • Facilitated faster debugging and better error handling by designing and implementing central logging solution for cloud hosted environments. • Implemented Chef cookbooks as a cloud hosting solution for powering over 200 websites. Developed in-house integration between Adobe Analytics and Tableau. ### Jr. Application Programmer @ NextGuest Jan 2014 – Jan 2015 | New York, New York, United States • Strategized, developed, and maintained hosting management web app managing over 200 OpsWorks stacks utilizing CloudFront, Ec2, IAM, Route53, and S3. • Developed and enhanced proprietary hospitality focused CMS Solution build on Zend Framework. ### Intern: TIS Server Operations @ MTA Jan 2013 – Jan 2013 | New York, New York • Developed and deployed VB.NET web services to assist with SCCM configuration and management. • Developed C#.NET web services to remotely enable and disable Citrix login on workstations. ## Education ### Bachelor's degree The City College of New York ## Contact & Social - LinkedIn: https://linkedin.com/in/guillermo-lopez-chavez-17541676 --- Source: https://flows.cv/guillermolopezchavez JSON Resume: https://flows.cv/guillermolopezchavez/resume.json Last updated: 2026-03-23