Jonnier Martinez
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Jonnier Martinez

Full Stack Software Developer experienced in designing and implementing scalable web applications, microservices, and business process automation. Passionate about Clean Architecture, SOLID principles, and building impactful products.

Experience

2 years 4 months - Present

  • Designed and implemented scalable web applications using .NET, C# and Angular following Clean Architecture and SOLID principles.
  • Developed microservices architecture in .NET for mass messaging system via WhatsApp, implementing patterns such as CQRS, Repository Pattern and Dependency Injection.
  • Integrated Zoho CRM through RESTful APIs for business process automation.
  • Implemented CI/CD pipelines and containerization with Docker for continuous deployment.
Remote

  • Developed WordPress websites with performance optimization and SEO.
  • Architected and implemented automation workflows with Zoho Flow and Twilio for omnichannel communication.
  • Designed analytical dashboards in Zoho Analytics with conversion KPIs (lead-to-deal ratio, win rate, pipeline velocity).
  • Configured Zoho CRM with custom workflows and automated triggers.

Projects

  • EdTech platform with +30,000 active users, architecture based on Clean Architecture and Domain-Driven Design.
  • Developed interactive class editor with Next.js, TypeScript and Server-Side Rendering (SSR) for performance optimization.
  • Implemented AI agents with Flask and OpenAI SDK, applying design patterns such as Factory and Strategy.
  • Containerization with Docker and service orchestration for horizontal scalability.
  • Next.js
  • TypeScript
  • Flask
  • OpenAI
  • Docker

  • Agentic application built with Flask and Python following Clean Architecture (Domain, Application, Infrastructure layers).
  • Integrated OpenAI SDK for natural language processing and complex task automation.
  • Implemented RESTful API with FastAPI, validation with Pydantic and OpenAPI/Swagger documentation.
  • Flask
  • Python
  • OpenAI
  • FastAPI

  • Architected GitHub API integration using OAuth 2.0 for authentication and repositories as data store.
  • Implemented abstraction layer for CRUD operations over GitHub as serverless database.
  • GitHub API
  • OAuth 2.0

  • Open source library for WhatsApp link generation with parameter validation and URL encoding.
  • Open Source
  • WhatsApp API

Education

April 2022 -- October 2024

  • Software Analysis and Development, Data Structures and Algorithms.
  • SQL, relational database design and UML modeling.
  • PHP programming and Object-Oriented Programming (OOP).
February 2020 -- December 2021

  • Development of teamwork, empathy and leadership skills.
  • Cultural diversity understanding and intercultural communication.

Awards & Recognition

2025

  • First place in #BuildInPublic category for transparency, storytelling and community engagement.
  • +13,000 users, +1,000 App Store reviews with 4.9 average rating.
  • Developed proprietary .gurwi file format for interactive lesson rendering.
  • Stack: Flutter, Supabase, PostgreSQL, custom content editor (Gurwi Educators).

Technical Skills

Languages

C# Python TypeScript JavaScript SQL HTML CSS

Frontend

React Next.js Angular Flutter Tailwind CSS

Backend

.NET Flask FastAPI PostgreSQL Supabase

AI

OpenAI SDK Gemini SDK Vertex AI Cursor Claude Code v0

Cloud & Infrastructure

Cloudflare R2 Cloudflare Stream Railway VPS Linux Vercel Netlify

DevOps & Tools

Docker Git GitHub CI/CD

Platforms

Zoho CRM Zoho Creator Zoho Flow Zoho Analytics WordPress

Integrations

Stripe RevenueCat Twilio GitHub API WhatsApp API

Spoken & Languages

Spanish (Native) English (B1)