Senior Full Stack Developer
Lean Tech, Colombia
Posted December 10, 2025
Full Time
About the Company
Lean Tech is a rapidly expanding organization situated in Medellín, Colombia, with a powerful tech workforce and a commitment to creating an inclusive environment for all employees.
Job Description
Lean Tech is seeking a Senior Full Stack Developer to drive the end-to-end development of their core product. The ideal candidate will have advanced proficiency in Ruby on Rails and React, as well as experience with database schema design, secure REST APIs, and complex application state management.
Requirements
- Advanced proficiency in Ruby on Rails for backend architecture
- Advanced proficiency in React for building sophisticated user interfaces
- Experience designing database schemas in PostgreSQL or MySQL
- Experience building secure REST APIs
- Experience implementing responsive components using React and TypeScript
- Experience managing complex application state using Redux Toolkit or the Context API
- Test-Driven Development (TDD) mindset
- Experience with backend testing tools like RSpec and Capybara
- Experience with frontend testing tools like Jest and React Testing Library
- Experience optimizing database queries
- Experience implementing server-side caching with Redis
- Experience managing background jobs with Sidekiq
Benefits
- Competitive salary
- Professional development opportunities
- Collaborative work environment
- Career path and mentorship programs
- Opportunity to work with international customers
- Equal opportunity employer
- Inclusive environment for all employees
