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Angel Gonzalez

@angelgonzalez2

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Full-Stack Developer at GastaBien, operating a personal-finance app with 10,000+ users and building its backend.

Dominican Republic

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What I'm looking for

I work best owning a feature from requirements through production support, including being on call for the backend.

At GastaBien, I built and operate the backend of my personal-finance app, which turns bank notification emails into categorized transactions for budgets, recurring-transaction detection, and spending insights. I built its Fastify and tRPC API over PostgreSQL and Prisma, and I'm on call for the backend.

At Gestalt Diagnostics, I designed and implemented a centralized authorization layer across 100+ microservices and developed NestJS APIs for a digital pathology platform. Earlier, I developed a QR-code payment backend at Glowicom and built the backend for a food delivery app and its real-time tracking system at VicBros.

Experience

Work history, roles, and key accomplishments

Current

Backend Engineer

Current

GastaBien

Oct 2024 - Present (2 years)

Built and operate the backend of a personal-finance app with 10,000+ users, turning bank notification emails into categorized financial transactions. Built the Google Cloud Pub/Sub consumer worker and the Fastify and tRPC API with Zod contracts and JWT auth.

NodeJS TypeScript Fastify tRPC PostgreSQL Prisma Google Cloud Pub Sub Docker OpenTelemetry Grafana JWT Zod

Backend Software Engineer

Gestalt Diagnostics

May 2025 - Apr 2026 (11 months)

Designed and implemented a centralized authorization layer for access control across 100+ microservices. Developed NestJS backend APIs for a digital pathology platform, including test coverage and documentation.

NestJS RabbitMQ Microservices Authorization Digital Pathology API Development Testing Documentation

Full Stack Software Engineer

Traktive.ai

Aug 2024 - Mar 2025 (7 months)

Optimized data ingestion by reusing database connections, improving performance by 22.96%. Built a scalable data transformation pipeline and a chat-based bill of lading tool on the OpenAI API with a Next.js frontend.

NodeJS Next.js OpenAI API data transformation Database Optimization Performance Improvement

Full Stack Software Engineer

WeDevelop

Nov 2022 - Aug 2023 (9 months)

Implemented a GraphQL server, improving system performance by 20%. Designed and implemented scalable APIs for managing talents and contractors using Node.js and PostgreSQL, and built a React.js frontend workshop.

GraphQL NodeJS PostgreSQL React API Design Performance Optimization

Full Stack Software Engineer

VicBros

Feb 2020 - Nov 2022 (2 years 9 months)

Built the entire backend for a food delivery app and its real-time tracking system using Node.js. Led the migration of all files to AWS S3 for a professional services app with 10,000+ users.

NodeJS S3 Real Time Tracking Backend Development Migration

Full Stack Software Engineer

Glowicom

Jan 2017 - Jan 2020 (3 years)

Developed the Node.js backend for a payment system handling customer transactions and business payments via QR codes. Built main functionalities of a hotel guest-interaction web app using Vue.js and PHP.

NodeJS Vue.Js PHP Payment Systems QR Code Payments Web Development

Education

Degrees, certifications, and relevant coursework

Universidad APEC

Bachelor of Software Engineering, Software Engineering

2019 - 2023

Bachelor of Software Engineering from Universidad APEC, with coursework in software architecture, security, ecommerce strategies, and usability engineering.

Instituto Técnico Superior Comunitario

Associate Degree in Computer Science, Computer Science

2015 - 2017

Associate Degree in Computer Science from Instituto Técnico Superior Comunitario, covering algorithms, data structures, OOP in C++, databases, and operating systems.