Wagner Santos
Wagner Santos

Senior Full Stack Developer

Open to offers · Member since 3 Nov 2026
Location
Quito, Ecuador
Desired salary
Unspecified
Work preference
Remote Only / Full Time
Experience level
Senior

About

Professional summary

I am a Senior Full Stack Developer with more than eight years of experience building and shipping web platforms end to end. I work across stakeholder requirements, architecture, implementation, deployment, and production support.

My primary stack is TypeScript, React, Node.js, and NestJS. I have delivered frontend applications, backend APIs, distributed microservices, mobile solutions, and data-driven internal platforms.

I have led frontend architecture modernization initiatives, including a migration from a legacy React single-page application to Vite and a domain-oriented functional architecture. I also have experience decomposing monoliths into maintainable NestJS microservices using PostgreSQL and RabbitMQ.

I enjoy building reliable cloud-native systems and have hands-on experience with AWS services, Docker, CI/CD, observability, and production operations. I use Grafana, Loki, Prometheus, and Alloy to monitor distributed systems.

I have worked on retail, fulfillment, call-center, e-commerce, vehicle-sales, education, and healthcare-related products. I also build and operate side projects, including a serverless POS platform and self-hosted HomeLab services.

I am based in Ecuador and open to remote opportunities across Latin America, the United States, and Europe. I communicate professionally in English at a C1 level and am a native Spanish speaker.

Skills

30 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Full Stack Developer Smart Job

Refactored the Fulfillment by Falabella products area end to end, including the React frontend and new backend endpoints. Integrated SMP product-data and PMS stock microservices owned by other teams.

Implemented the DOFA feature for in-store product drop-off, truck pickup, and live stock updates for external clients. Delivered features from stakeholder requirements through production in a distributed microservices environment with tracing and observability using Grafana and Loki.

Senior Full Stack Developer Workers Benefit Fund

Proposed and led the migration of a legacy React single-page application to Vite with a domain-oriented functional architecture, creating a cleaner and more maintainable frontend following an unsuccessful Next.js approach. Designed and implemented multi-tenant support with cross-tab state synchronization for organization switching.

Decomposed an initial monolith into approximately five NestJS, PostgreSQL, and RabbitMQ microservices, including a statistics service for the mobile application. Built internal platforms used daily by around 30 call-center operators, onboarded and mentored team members, and established coding standards and documentation practices.

Full Stack Developer Workers Benefit Fund

Developed and maintained W360 using React, Redux Toolkit, and Mantine, delivering new features, architectural improvements, and systematic technical-debt reduction.

Built and optimized NestJS and PostgreSQL endpoints for the Query Server microservice and improved monitoring with Grafana and Loki. Delivered the first product release for an internal client and contributed to the IDG deactivation project using SvelteKit, GraphQL, and MongoDB.

Backend & Frontend Developer Tinkin Tech Partner

Built a digital retail platform serving nine vehicle-sales websites and a Volkswagen vehicle-tracking application. Developed the dealer administration platform using React Native, NestJS, and GraphQL.

Delivered e-commerce and psychometric platforms for Ecuadorian clients using Next.js, Node.js, MongoDB, and Firebase.

Frontend Developer Kudert

Maintained and improved a legacy React platform, addressing ongoing product and technical needs.

Contributed to development of the platform's new version while supporting the existing application.

CMS and LMS Developer Freelance

Customized CMS solutions for client needs using WordPress and Joomla.

Built e-learning platforms using Moodle and related CMS technologies.

Education

Learning history

Universidad Central del Ecuador

Computer Engineer, Computer Engineering

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