About the role

Role Overview

Senior App Developer for a contract-based remote role. You will take ownership and build a premium mobility product end-to-end—not a “follow instructions” position.

Responsibilities

Build and launch a world-class web app and native iOS + Android apps from scratch
Design and implement a premium, fast, and visually high-quality user experience
Architect scalable systems to support rapid growth
Use AI tools to increase development speed and output
Integrate AI into the product to deliver smarter, more personalized experiences
Collaborate closely on product direction, features, and user flows
Continuously refine, optimize, and improve performance

Requirements

Proven track record of building exceptional, polished apps (portfolio required)
Strong experience across web + native mobile development (iOS and Android)
Strong UI/UX sensibility with attention to detail
Deep understanding and hands-on usage of AI in development workflows
Experience building or integrating AI-powered product features
Ability to move fast, solve problems, and operate independently
Clear communication and high standards

Bonus

Experience in fitness, mobility, health, or performance
Experience building 0 → 1 products or startups
Experience with AI-driven coaching, analysis, or personalization

Not a Fit If

You need constant direction or prefer slow execution
You are comfortable shipping “good enough” work

About Reboryn

Reboryn is building a premium, AI-powered mobility and longevity platform aimed at helping people eliminate pain, move freely, and perform at a higher level throughout life. The company focuses on creating a category-defining app that combines mobility, strength, and intelligent feedback into a single seamless experience.

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