Senior Full-Stack Engineer — Remote (Rails + React Native)

Kolsquare | B Corp™; Spain (TX); Remote; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Remote work Europe

Coworking access

Team events

Market-based package

Stability + agility

Training & development

Job summary

Kolsquare is building a new B2C product for the next generation of content creators, and we need a strong Senior Full Stack Developer to join as a technical partner. You will work with Rails API endpoints and React Native screens to deliver a seamless cross‑platform experience for creators across web and mobile.

You will influence architecture, raise the bar on quality, and help shape an early‑stage product with ambitious goals.

Qualifications

• 3+ years of experience in Ruby/Rails.
• Experience with React (preferably Native).
• Autonomous, organized, proactive with multi-project delivery ability.
• Experience leveraging AI to optimize output.
• Fluent in English and good team collaboration.

Responsibilities

• Full stack development from Rails API to React Native screens across web and iOS.
• Contribute to architecture decisions and maintain code quality.
• Integrate with social media APIs, payment systems, and third‑party services.
• Participate in deployment pipeline and observability to keep production stable.
• Collaborate with product/design to translate user needs into technical solutions.

Skills

Ruby / Rails

React

React Native

Tools

Kamal on GCP

Job description

Kolsquare is building a new B2C product for the next generation of content creators, and we need a strong Senior Full Stack Developer to join as a technical partner. You will work with Rails API endpoints and React Native screens to deliver a seamless cross‑platform experience for creators across web and mobile.

You will influence architecture, raise the bar on quality, and help shape an early‑stage product with ambitious goals.