Rodrigo Samayoa

Frontend Software Engineer

Building software that solves complex problems.

Software engineer specializing in frontend development, with experience building complex web and mobile products across the full stack.

View my experienceLearn more about me
Rodrigo Samayoa

Core technologies

  • React
  • Next.js
  • TypeScript
  • Supabase

01 — Experience

Professional experience

Experience building production software across auction platforms, maritime technology, real estate, and enterprise systems.

01

2024 — Present

PopAuctioon

Current

Lead Full-Stack Engineer

A real-time auction and marketplace platform supporting live and automatic auctions, online sales, payments, settlements, and mobile experiences.

Experience details

PopAuctioon

Lead Full-Stack Engineer · 2024 — Present

PopAuctioon

A real-time auction and marketplace platform supporting live auctions, online sales, payments, store settlements, and a native mobile application.

Visit PopAuctioon

My role

Responsible for the architecture and development of the platform, working directly with the client from product definition through production delivery, ongoing maintenance, and continuous improvement.

PopAuctioon marketplace and auction platform
PopAuctioon — marketplace and auction platform

01 — Overview

Building the product end-to-end

I've worked on PopAuctioon since the beginning of the product, contributing across its architecture, user experience, data model, integrations, and production infrastructure.

The platform has grown beyond its original auction functionality into a broader marketplace with multiple user roles, payment flows, administrative tooling, mobile experiences, and operational workflows.

02 — Selected systems

Selected systems I've built

01

Real-time auctions

Built the bidding experience and auction workflows for live auctions, including countdowns, bidding state, reserve-price behavior, automatic bidding, and real-time updates.

02

Payments & settlements

Implemented payment flows involving buyer commissions, taxes, shipping, discounts, store commissions, refunds, and settlement calculations.

03

Marketplace workflows

Developed online-store functionality, second-chance sales, offer and counter-offer flows, administrative tools, and multi-role workflows.

04

Mobile application

Extended the platform to React Native and Expo while reusing the existing backend services and business logic.

PopAuctioon live auction web interface
Live auction — web
PopAuctioon live auction mobile interface
Live auction — mobile

03 — Technical scope

Beyond the frontend

Frontend engineering is my primary focus, but building PopAuctioon from its early stages has required me to work across most parts of the product and its technical architecture.

01

Frontend architecture

  • Next.js application architecture using the App Router
  • Reusable component and form architecture with React and TypeScript
  • Responsive interfaces for users, stores, and administrators
  • Complex state management across auctions, checkout, offers, and administration
  • Performance optimization across critical user flows
  • Internationalized interfaces in English and Spanish
02

Real-time systems

  • Real-time bidding and auction state synchronization
  • Live auction administration and article sequencing
  • Countdown-based bidding workflows
  • Automatic bidding behavior and bid increments
  • Reserve-price and article-selling logic
03

Backend & data

  • PostgreSQL data modeling and relational architecture
  • Server-side business logic and Next.js APIs
  • Supabase authentication and authorization
  • Row Level Security policies for multi-role access
  • Database functions and RPCs for transactional operations
  • Data migrations and schema evolution as the product expanded
04

Payments & financial flows

  • Buyer payment flows and payment-provider integrations
  • Buyer and store commission calculations
  • VAT and tax calculations
  • Shipping and discount calculations
  • Refund and payment-status workflows
  • Store settlements and payout calculations
  • Handling shared shipping costs when multiple articles belong to the same auction
05

Marketplace & commerce

  • Online-store functionality outside the auction flow
  • Second-chance sales for unsold auction articles
  • User offers, counter-offers, acceptance, rejection, and expiration workflows
  • Multi-role marketplace workflows for buyers, stores, and administrators
  • Article creation, editing, validation, pricing, and inventory states
  • Administrative dashboards for operational workflows
06

Mobile

  • Reuse of the existing backend and business architecture
  • Mobile implementations of authentication, articles, auctions, and payments
  • Shared business rules between web and mobile experiences
  • React Native application developed with Expo
  • Production iOS builds and deployment workflows
07

Integrations & infrastructure

  • Payment-service integrations
  • Transactional email and notification workflows
  • Sentry monitoring, error reporting, and source maps
  • Shipping-provider integration work and label-generation workflows
  • Vercel deployment and production environments
  • AWS IVS for live streaming
08

Product ownership

  • Direct collaboration with the client to define product requirements
  • Translation of business requirements into technical solutions
  • Technical architecture and implementation decisions
  • Continuous evolution of the platform as new business requirements emerged
  • Prioritization of features and improvements
  • Production maintenance and debugging

Technologies & platform

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • Supabase
  • PostgreSQL
  • React Native
  • Expo
  • Vercel
  • Sentry
  • REST APIs
  • Designed the platform architecture and database model.
  • Built real-time bidding and multiple auction workflows.
  • Implemented payment, streaming, marketplace, and administrative systems.
  • Developed the mobile application using the existing backend architecture.
  • Worked directly with stakeholders to define and prioritize product functionality.
  • Next.js
  • React
  • TypeScript
  • Supabase
  • PostgreSQL
  • React Native
  • Expo

02

2025 — 2026

OrbitMI

Frontend Software Engineer

A maritime technology microservice focused on route visualization, operational analysis, and complex graph-based interactions, developed as part of the company’s broader platform.

  • Built interactive graph-based interfaces using React Flow.
  • Implemented route exploration and multiple visualization modes.
  • Developed simulations related to maritime routes and fuel supply.
  • Integrated the microservice experience into the broader company platform.
  • Collaborated with backend, product, and QA teams.
  • React
  • TypeScript
  • React Flow
  • REST APIs
  • Jira

03

2025

Stena Bulk

Frontend Software Engineer

An internal maritime route visualization tool for exploring and simulating logistics data.

  • Developed graph-based maritime route interfaces.
  • Transformed backend data into interactive graph structures.
  • Integrated APIs and product requirements into frontend functionality.
  • Collaborated with product, data, and maritime-domain specialists.
  • React
  • TypeScript
  • React Flow
  • Python

04

2020 — 2022

Uwii

Full Stack Developer

A web and mobile marketplace for buying, selling, and renting real estate in Guatemala.

  • Developed the web platform using React.
  • Built the mobile application using React Native and Expo.
  • Integrated APIs, third-party services, and Firebase.
  • Implemented frontend and backend business logic.
  • React
  • JavaScript
  • React Native
  • Expo
  • Firebase

05

2020 — 2022

SERVIR MS

Software Developer

Enterprise ERP and human-resource management software developed around client requirements.

  • Developed and maintained enterprise applications.
  • Implemented frontend features and supporting backend endpoints.
  • Gathered requirements and validated functionality with stakeholders.
  • Worked with MySQL data and existing production systems.
  • Ember.js
  • JavaScript
  • PHP
  • MySQL
  • REST APIs

02 — Capabilities

I work across the full product lifecycle.

From product interfaces and backend architecture to real-time systems, integrations, deployment, and cross-functional delivery.

03 — Education

Education

Harbour.Space

Jan 2024 — Sep 2025Barcelona, Spain

Master's

Frontend Development

UPC School

Oct 2022 — Nov 2023Barcelona, Spain

Master's

AAA Video Game Development

Universidad del Valle de Guatemala

Jan 2017 — Nov 2021Guatemala City, Guatemala

Bachelor's

Computer Science

04 — About

I enjoy building software that people actually use.

Over the last few years I've worked on products across different industries, from real-time auction platforms and maritime logistics to enterprise software and mobile applications.

The thing they all have in common is complexity. I enjoy understanding how a product works, breaking problems into smaller pieces, and building solutions that are building solutions that remain reliable, maintainable, and enjoyable to work on.

While frontend engineering remains my primary focus, working on complete products naturally led me towards backend development, databases, infrastructure, and product architecture. Having that broader perspective helps me collaborate more effectively across engineering teams and make better technical decisions.

Currently looking for my next Frontend Software Engineer role.

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05 — Contact

Let's talk.

If you think my experience could be a good fit for your team, feel free to get in touch.

Email me