Senior Fullstack Engineer: React/Node & Data Platforms

Lean Solutions Group; Medellín; On-site; COP 90,000,000 - 120,000,000; Full time

Job summary

Global Technology Services in Medellín, Colombia, is seeking a Senior Fullstack Developer to build IQ Billing from data layer to user interface. You will work with React on the frontend and Node.js on the backend to support daily claims, payments, and revenue processing.

You will collaborate with expansive engineering teams across Latin America, the Philippines, and the United States, applying a product mindset and delivering polished UI with scalable architecture.

Qualifications

• 4+ years of production full stack experience.
• Strong JavaScript/TypeScript and React deep fluency with hooks and modern patterns.
• Strong Node.js with Nest.js or Express.js or similar backend experience.
• Solid relational database experience, especially PostgreSQL, with non-trivial SQL.
• Preference for type-safe code and maintainable architecture across the stack.
• Experience building with LLM APIs (Anthropic, OpenAI, or similar).
• Daily use of AI coding assistants (Claude Code, Cursor, GitHub Copilot).
• Comfort shipping polished UI with loading, empty, and error states.

Responsibilities

• Build IQ Billing end-to-end - the financial platform used daily to manage claims, payments, and revenue.
• Own features from data layer to UI: React frontend and Node.js backend processing.
• Collaborate with engineering teams across LATAM, Philippines, and the United States.

Skills

JavaScript/TypeScript

React

Node.js

PostgreSQL

Type-safe code

LLM APIs

AI tooling

UI/UX polish

Tools

Nest.js

Express.js

PostgreSQL

SQL

OpenAI API

Job description

Global Technology Services in Medellín, Colombia, is seeking a Senior Fullstack Developer to build IQ Billing from data layer to user interface. You will work with React on the frontend and Node.js on the backend to support daily claims, payments, and revenue processing.

You will collaborate with expansive engineering teams across Latin America, the Philippines, and the United States, applying a product mindset and delivering polished UI with scalable architecture.