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Reiner Marquez Full-Stack Software Engineer
Profile

Seasoned Full-Stack Software Engineer with over 15 years of experience in frontend and backend development. Proven expertise in enhancing application architecture, optimizing performance, and implementing best practices. Known for strong problem-solving abilities. Comfortable with learning on the go. Recently implemented an LLM-based app to generate YouTube video chapters automatically.

Skills
Python
Javascript
SQL / NoSQL
Unit Testing
Django
VueJS / NuxtJS
REST APIs
Professional Experience
  • •Updated the legacy Shopify app to support OAuth authentication, streamlining the auth flow and eliminating unnecessary redirects.
  • •Optimized app architecture for handling Shopify webhooks with celery/rabbitmq, boosting scalability and reducing infrastructure costs by 30% through a switch from Google Pub/Sub to HTTPS.
  • •Led the fixing of issues detected during the Shopify App Review process, which allowed to get the Shopify App approved
  • •Contributed to the resolution of issues identified during the Shopify App Review, resulting in app approval.
  • •Conducted technical interviews as a key part of the recruitment team.
    • Independent Software Developer, Self Employed
    07/2023 – 08/2023
  • •Contributed to open-source project MindsDB by adding an Application handler for Webz API, resulting in the creation of a boilerplate code generator for new handlers.
    • Full Stack Developer, QBan Consulting
    06/2022 – 07/2023
  • •Defined and implemented software development best practices: versioned legacy code, adopted GitHub flow and standardized code format with lint tools.
  • •Developed reusable Vue.js components to enhance UI consistency and code maintainability.
  • •Established CI/CD pipeline for streamlined development and deployment processes.
  • •Added new features, resolved critical bugs, and conduct the release of the MVP.
    • 06/2021 – 05/2022
  • •Served as Interim Tech Lead, guiding the team through critical phases.
  • •Conducted onboarding for two project members, including a new Tech Lead.
  • •Provided valuable feedback during code reviews, enhancing code quality.
  • •Implemented unit tests, increasing code coverage to over 90% and improving reliability.
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  • •Optimized API performance by adding DB indexes, optimizing SQL queries and resolving n+1 GraphQL issues.
    • Tech Lead, Zehnergroup
    04/2012 – 07/2020
  • •Led the technical team while handling both backend and frontend development and managing DevOps processes
  • •Conducted technical interviews to identify and recruit qualified candidates
    • Projects
    Options Explorer, An options analysis tool that empowers users with advanced insights to enhance their trading strategies
  • •Data retrieval via Polygon API and flat files.
  • •Interactive dashboard with fast response times, utilizing DuckDB for efficient data handling and Apache Parquet format for efficient data storage
    • Certificates
    Languages
    Spanish — C2English — B2
    Hobbies
    Solving puzzlesBoard gamesWorking out
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