Experience

Experience

Senior Backend Developer — ZappyChat (CloseBot)

Apr 2024 – Present (Post-Acquisition) · Monterrey, NL, Mexico

Highlights

  • Took full ownership of the backend platform, leading the redesign of core systems to support multiple AI providers, reduce response times, and significantly improve maintainability.

  • Designed and implemented backend services in Python/FastAPI, integrating advanced AI capabilities and ensuring scalable, secure, and high-performance data flows.

  • Identified and resolved critical issues across existing application components, improving reliability and system behavior under load.

  • Modernized the application’s architecture and development practices, introducing clearer boundaries, better patterns, and more consistent engineering workflows.

  • Assessed security risks across backend services and cloud infrastructure, strengthening API protection, credential handling, and overall operational security.

  • Built monitoring and observability tools for SRE and business teams, enabling real-time visibility into technical performance, errors, throughput, and key business metrics using AWS CloudWatch and custom dashboards.

Tech

NodeJS 16/18 · JavaScript · VueJS · Jest · Python · FastAPI · Pytest · MySQL · AWS · Docker · GitHub · OpenAI API · Google Generative AI

Senior Backend Developer — Apptegy

Nov 2022 – Jan 2024 · Monterrey, NL, Mexico

Highlights

  • Developed and maintained large-scale web applications using Ruby on Rails 7, implementing new features, system improvements, and performance optimizations.

  • Designed backend components and rebuilt several application modules to improve reliability, scalability, and maintainability.

  • Collaborated with cross-functional teams to enhance system architecture, improve code quality, and streamline deployment workflows.

  • Strengthened backend performance by tuning SQL queries, optimizing data flows, and introducing caching strategies with Redis.

  • Supported CI/CD and deployment pipelines using Jenkins, Docker, and AWS services.

Tech

Ruby on Rails 7 · JavaScript · VueJS · Mocha · PostgreSQL · Redis · Jenkins · AWS S3 · Docker · GitHub

Senior Backend Developer — Vault

Feb 2022 – Nov 2022 · Austin, TX, USA

Highlights

  • Developed and enhanced backend services for the Student Loan Benefits platform, enabling employers to manage and automate employee education loan payments.

  • Built reliable tools and backend modules for tracking contributions, managing loan data, and improving reporting accuracy for internal and external stakeholders.

  • Improved reliability and performance across Ruby on Rails 6 systems by optimizing SQL, refactoring legacy components, and enhancing data integrity checks.

  • Integrated AWS services to improve deployments, logging, and monitoring.

Tech

Ruby on Rails 6 · PostgreSQL · AWS CodeBuild · AWS CloudWatch · Docker · GitHub · Ubuntu 20

Lead Software Developer — Shastic

Jan 2021 – Feb 2022 · Berkeley, CA, USA

Highlights

  • Led a distributed engineering team, overseeing architecture, development practices, code quality, and delivery timelines.

  • Designed and deployed cloud infrastructure using AWS, Terraform, CloudFormation, Lambda, and S3, improving system scalability and operational reliability.

  • Developed major backend features for Shastic’s automation products, including the early stages of the DocPush system.

  • Improved observability and operational stability by enhancing logging, monitoring pipelines, and cloud resource organization.

  • Provided technical leadership, mentoring junior developers, conducting code reviews, and ensuring adherence to software engineering best practices.

Tech

Ruby on Rails 5.7 · CoffeeScript · JavaScript · MySQL 8 · AWS · Terraform · CloudFormation · AWS Lambda · AWS S3 · Redis · Docker · Bitbucket · Jira

Full Stack Developer — Shastic

Aug 2018 – Jan 2021 · Berkeley, CA, USA

Highlights

  • Designed, developed, and maintained full-stack applications for financial institutions, improving performance, reliability, and user workflows.

  • Built backend features and automation tools using Ruby on Rails, AWS Lambda, and custom tracking systems.

  • Improved system performance across multiple products by optimizing backend logic, queries, and infrastructure.

  • Collaborated with product and engineering teams to deliver new features, integrations, and internal tools.

Tech

Ruby on Rails 5.7 · CoffeeScript · JavaScript · MySQL 8 · AWS CodeBuild · AWS CloudWatch · AWS Lambda · AWS S3 · Redis · Docker · Bitbucket · Jira