Rafael Iga

Senior full-stack engineer · Rails & Elixir · Brazil (UTC-3)

20 years building web and mobile products, from backends and APIs to apps in the stores. Rails and Elixir at the core, with React, Flutter and a good amount of cloud and DevOps around them.

Experience

2024–2026
Property management platform Brazilian payment gateways (Asaas, Inter, Itaú, Banco do Brasil): charges, boletos, webhooks and reconciliation. Multi-organization management and integrated AI features.PHP / Laravel · React Native · LLM APIs
2023–2026
Auditing document system OCR with Tesseract, document upload and approval flow, with an AI analysis layer on top of the extracted data.Rails · OCR · LLM APIs
2020–2026
B2B platform modernization Gradual rewrite of legacy services and data pipelines to Elixir/Phoenix, including a migration from .NET/MySQL to Elixir/PostgreSQL, and asset uploads.Elixir · Phoenix · PostgreSQL
2020–2026
Digital signage and media players Flutter player apps for Android and Android TV, plus Raspberry Pi players, with audio and video streaming.
2022–2023
Wi-Fi marketing app Native iOS (Objective-C) and Android (Java) rewritten in Flutter.
2019–2024
Live sports streaming Backend and subscription core for a multi-channel platform with large traffic spikes during live broadcasts. Several payment gateways behind one interface (Iugu, PayPal, PagSeguro), recurring billing, refunds that revoke access, and a polling job as a safety net when a webhook never arrives. An Elixir microservice handled streaming concurrency, and I built the Flutter apps.PHP / Laravel · Elixir · Flutter · AWS
2016–2017
Social app Calendar and recurring events.
2013–2015
Telehealth app Native Android and iOS, medical integrations.
2013–2015
Telephony service IVR system and mobile app.
2011–2019
Event management RSVP and mass invitations.
2008–2013
Web communications and social products Early Rails (2.3/3) apps and code migrations.
2007
Email provider SMTP backend.

Stack

Ruby on Rails
Elixir / Phoenix
PHP / Laravel
React
Flutter
React Native
PostgreSQL
Redis / Sidekiq
AWS
Docker / Dokku
Stripe
PayPal
Asaas
Iugu

Background

Senior engineer at RubyThree (2012–2019) and engineer at Sonnay Software (2005–2011). Today I currently work with Agência F12, building web and mobile products for clients. B.Sc. in Software Engineering. Fluent in English after living and studying in California, and I work daily with US-based teams and AI coding tools.