Full Stack Software Engineer

Isaac Fuenmayor

Rails engineer focused on backend systems, APIs, integrations, and real-time applications.

Based in Chicago. Building reliable systems and interesting products.

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Resume

Featured Projects

What I've built

QuidQuote

A messaging app for splitting costs and tracking balances. I got tired of awkward spreadsheets and tools that didn't fit how I actually wanted to manage shared expenses.

Why it matters

Built around real-time state, authentication flows, and group balance logic.

  • Rails API
  • GraphQL
  • Action Cable
  • Pundit
  • React Native

WikiNetwork

CLI tool for finding navigation paths between Wikipedia pages.

Why it matters

Focused on algorithmic search and lazy graph expansion over live API data.

  • C++
  • Graph Traversal
  • BFS/DFS
  • MediaWiki API

Image DSL Compiler

Java-based compiler for a custom image-oriented language.

Why it matters

Designed parsing, AST, semantic analysis, and Java code generation pipeline.

  • Java
  • Compiler Design
  • AST
  • Semantic Analysis

Experience

Where I've worked

Software Engineer - InfoTech

2022 - 2026

  • Worked across a large Rails and Vue codebase used by thousands of contractors and project managers.
  • Shipped features in reporting, search, integrations, and authorization across backend and frontend.
  • Spent a lot of time on cross-cutting production bugs where one issue touches the backend, the frontend, and a partner system all at once.
  • Modernized legacy UI and overhauled the test infrastructure.
  • Helped make the local dev environment something new engineers could actually set up on day one.

Software Engineer Intern - Springbig

2021

  • Worked as a liaison between Springbig and external developer teams integrating with our API, helping define how integrations actually worked.
  • Automated a reporting workflow that had been eating 10+ hours a week of manual effort using Rails, Python, and AWS Lambda.
  • Wrote a ton of SQL for reporting and data pulls.
  • Got comfortable debugging integration failures through CloudWatch and API Gateway, which turned into a recurring theme in my career.

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