Kevin Jesus Cabello Valencia

Backend Software Engineer

Backend-focused Software Engineer with 3+ years of experience building web, mobile, and backend applications. I enjoy being involved in the entire development lifecycle, from technical design and architecture to development, deployment, and production maintenance. I primarily work with PHP and Node.js, building APIs and systems that leverage MongoDB and PostgreSQL to efficiently handle large-scale datasets.

Apatzingán, Michoacán, México kevinjesuscabellovalencia@gmail.com LinkedIn

Experience

CoffeeSystems

Software Engineer

Apatzingán, Michoacán, México · January 2026 – Present

  • Implemented serverless infrastructure on AWS using CDK (Infrastructure as Code) in TypeScript, managing 40+ Lambda functions (Node.js 24), AppSync (GraphQL), DynamoDB, Cognito, and S3.
  • Designed a modular GraphQL schema with 18 domains and type-safe Lambda resolvers.
  • Modeled the database using Single-Table Design in DynamoDB with PK#SK patterns and GSIs.
  • Implemented a multi-app authentication and authorization system with Cognito, including pre-authentication and post-confirmation Lambda triggers, user groups, and @aws_cognito_user_pools directives in the GraphQL schema.
  • Developed webhooks for Stripe and Mercado Pago, including payment processing, automatic subscription renewals, and secure credential storage in Secrets Manager.
  • Configured a multi-tenant isolation model where each tenant has a unique tenantId as the DynamoDB partition key, with validation in every Lambda resolver and modular plans managed through feature flags.

CubitNet

Software Engineer

Morelia, Michoacán, Mexico · June 2024 – December 2025

  • Optimized MongoDB queries and data models, achieving a 40% improvement in response times and 15% reduction in database costs.
  • Designed and developed REST APIs using PHP, enabling efficient integration between internal services and improving data exchange performance.
  • Developed and maintained two Android mobile applications using Java and Kotlin, improving stability and reducing user-reported issues.
  • Contributed to the development and evolution of two web platforms using React, HTML, CSS, and modern JavaScript, delivering new features and performance optimizations.
  • Designed a reusable CSS library for PDF generation using HTML2PDF in PHP, standardizing document templates and significantly reducing document development time.
  • Implemented the complete SaaS license payment and renewal flow through Mercado Pago integration, automating payment validations and service activation.
  • Integrated automated WhatsApp messaging for transactional notifications to clients across multiple tenants, including sales, policy renewals, rental contract start dates, and other key operational events.
  • Developed campaign broadcasting and bulk communication tools through WhatsApp, improving commercial reach and customer engagement.
  • Refactored and maintained legacy code, improving code structure, maintainability, and overall quality.
  • Participated in production incident resolution (L2 Support) through debugging and root cause analysis to improve system reliability.
  • Managed Linux infrastructure, performing configuration, deployments, automation tasks, and operational support to ensure platform availability.

CEO Insurance

Full-Stack Developer

Morelia, Michoacán, Mexico · December 2024 – July 2025

  • Developed two insurance quotation systems (life and cargo insurance) and their landing web applications using vanilla JavaScript, optimized for lead generation and fast quote generation.
  • Implemented dynamic PDF generation for quotes and policy terms using HTML2PDF, automatically sending them to customers via email and WhatsApp integrations.
  • Designed and implemented a WEB API for quote storage, integrating it with the existing backend to centralize generated quote data.
  • Implemented backend services that convert quotes into active insurance policies, integrating with the existing policy data model to automate contract generation and eliminate manual data entry.
  • Deployed applications on VPS infrastructure, including Cloudflare configuration for caching, DNS, and SSL certificates, improving security and performance.

Optica y Hospital de Lentes de Michoacán

Software Developer

Morelia, Michoacán, Mexico · March 2025 – September 2025

  • Migrated an existing PHP + SQL Server local system to a multi-branch cloud architecture, enabling centralized data access and improved system accessibility.
  • Redesigned MySQL database structure for cloud deployment and branch synchronization.
  • Implemented offline-first capabilities, allowing branches to operate without internet connectivity in areas with unstable connections.
  • Implemented data synchronization mechanisms between local instances and the central server to ensure data consistency once connectivity is restored.

Américas Pádel

Full-Stack Developer

Morelia, Michoacán, Mexico · December 2024 – January 2025

  • Developed a web application using JavaScript that allows customers to place orders directly from their table, improving service efficiency and reducing staff workload.
  • Designed and implemented a PHP backend API with MongoDB, integrated with the existing CubitNet backend for order synchronization and management.
  • Integrated POS printing solutions for kitchen and ticket printing, automating the order workflow between the web application and the restaurant system.
  • Implemented real-time debt tracking and bill splitting between customers, improving payment experience and consumption control.
  • Developed the frontend using JavaScript, HTML, CSS, and Bulma, creating a lightweight and responsive interface optimized for mobile devices at tables.
  • Led the full deployment of the platform on a VPS, including domain purchase and configuration via Namecheap, Linux server setup, and production release.

BigPrint Imprenta

Full-Stack Developer

Morelia, Michoacán, Mexico · March 2024 – August 2024

  • Designed and developed the backend architecture for the platform, applying separation of concerns, scalable patterns, and software engineering best practices.
  • Built, documented, and maintained REST APIs for internal consumption and third-party service integrations.
  • Implemented integrations with external APIs, including Clientify, using webhooks and event synchronization to automate cross-system workflows.
  • Developed automation processes that reduced manual operational tasks and increased efficiency.
  • Optimized SQL queries and database structures, improving performance and response times in critical system modules.
  • Configured development, testing, and production environments, standardizing workflows and deployment processes.
  • Managed deployments on VPS infrastructure in Google Cloud Platform, including Linux server administration, Nginx/Apache configuration, environment variables, and baseline security hardening.
  • Developed React frontend modules while maintaining jQuery compatibility.
  • Participated in production incident resolution, system maintenance, and technical decisions related to scalability, reliability, and maintainability.

Skills

Languages

JavaScript Python PHP Swift Kotlin Java Go

Frontend

React Bootstrap Tailwind Svelte jQuery

Backend

Express.js Nest.js Fastify Hono Node.js FastAPI Flask Spring Boot AWS AppSync

Cloud

GCP (Cloud Storage Compute Engine) AWS (S3 Amplify EC2 Route53 Cognito DynamoDB AppSync CloudFormation) Supabase

Mobile

Jetpack Compose SwiftUI React Native Java Android SDK

Selected Projects

Pawn Shop Management System

Web platform for managing pawn shop operations, including loan records, pawned item tracking, payment monitoring, expiration handling, and operational reporting. Built with Svelte and Supabase.

Svelte Supabase

Automated Telcel Recharge Machine

Self-service recharge machine using Raspberry Pi with coin and bill acceptors, automating mobile recharges without human intervention.

Raspberry Pi Python

School Management System

System for managing students, attendance, groups, capacity limits, teacher schedules, and payroll. Implemented using PHP and MySQL with server-side rendered architecture.

PHP MySQL

Education

Instituto Tecnológico Superior de Apatzingán

Bachelor's Degree in Computer Systems Engineering

Apatzingán, Michoacán, Mexico

August 2021 – June 2025