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Looking for a Backend Role
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Su1kii/README.md

Steven Echeverria — Backend Engineer

Specializing in payment infrastructure, distributed systems, and backend architecture — building systems that handle real money, real users, and real consequences.

  • 🏗️ Shipped production platforms for real businesses with live users and active payments
  • 💳 Deep experience with Stripe webhooks, idempotency, event deduplication, and retry logic
  • ⚙️ Build enterprise-grade backends with queues, workers, async processing, and role-based security
  • 🔐 JWT authentication, refresh token rotation, RBAC, and TOTP 2FA
  • 📦 Java (Spring Boot) · Python (FastAPI) · PostgreSQL · RabbitMQ · Redis · Docker · Flyway

🚀 Featured Projects

Project Stack Description
Pura Vida Entertainment Java, Spring Boot, React, Stripe, RabbitMQ, Redis Enterprise studio booking and music label platform with async processing, 2FA, and idempotent payments
Five Star HVAC Python, FastAPI, PostgreSQL, Stripe, Docker Full service management platform with booking automation, RBAC, and live payments
Original Design Dealership Next.js, TypeScript, PostgreSQL, Stripe Dealership management platform with inventory, contracts, and webhook-driven payment confirmation

All three projects are built for real businesses with real users and real revenue. Not demos or side projects.

🛠️ Tech Stack

Languages: Java · Python · TypeScript · JavaScript · SQL

Backend: Spring Boot · FastAPI · Node.js · REST APIs · SQLAlchemy

Payments & Auth: Stripe · JWT · OAuth2 · RBAC · 2FA (TOTP)

Infrastructure: PostgreSQL · RabbitMQ · Redis · Docker · Flyway · CI/CD

🔗 Portfolio: steven-en.vercel.app 📫 Email: stevennava749@gmail.com

LinkedIn Email

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  1. Carventory Carventory Public

    Carventory is a full-stack car dealership inventory management app designed to streamline the process of listing, viewing, and managing vehicles online. Built with modern web technologies including…

    TypeScript 1 1

  2. Music-Lounge-MERN- Music-Lounge-MERN- Public

    Music streaming platform inspired by Spotify. Built with the MERN stack, real-time messaging via Socket.IO, and styled beautifully with ShadCN UI, this app provides a smooth and interactive user ex…

    TypeScript

  3. LearningApp LearningApp Public

    An app design to help students and teachers learn and teach easier, using AI to grade and help students. (Quick App, interview test project)

    TypeScript

  4. Restaurant Restaurant Public

    A full-stack restaurant review application built with Spring Boot (Java) and React, featuring user authentication, role-based access control, and a modern, responsive UI.

    JavaScript