About the Role
Company DescriptionReboryn is building a premium, AI-powered mobility and longevity platform designed to help people eliminate pain, move freely, and perform at a higher level for life.
This is not another fitness app.We are building a category-defining product that combines mobility, strength, and intelligent feedback into one seamless experience. The goal is simple. Create the most effective, best-looking, and highest-performing mobility app in the world.
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Role DescriptionWe are looking for a Senior App Developer who can build at an elite level.
This is a contract-based remote role for someone who can take ownership of the product and execute fast. You will be responsible for building both the web platform and native mobile apps (iOS + Android) from the ground up.
This is not a "follow instructions" role.This is a build, solve, and ship role.
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What You'll Do • Build and launch a world-class web app + native iOS and Android apps • Design and implement a premium, fast, and visually elite user experience • Architect scalable systems that can handle rapid growth • Use AI tools to dramatically increase development speed and output • Integrate AI into the product to deliver smarter, more personalized user experiences • Work closely on product direction, features, and user flows • Continuously refine, optimize, and improve performance
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What We're Looking For • A proven track record of building exceptional, polished apps (portfolio required) • Strong experience across web + native mobile development (iOS and Android) • An eye for premium design, smooth UX, and detail • Deep understanding and usage of AI in development workflows • Experience building or integrating AI-powered features inside products • Ability to move fast, solve problems, and operate independently • High standards. Low ego. Strong ownership.
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Non-Negotiables • You care about speed, performance, and quality • You don't ship average work • You can take an idea and turn it into a finished, high-level product • You communicate clearly and execute without hand-holding
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Bonus • Experience in fitness, mobility, health, or performance • Experience building 0 → 1 products or startups • Experience with AI-driven coaching, analysis, or personalization
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Who This Is NOT For • Developers who need constant direction • Slow executors • People who are okay shipping "good enough"
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Who This IS ForSomeone who wants to build something category-defining.Someone who takes pride in creating beautiful, fast, world-class products.Someone who wants to be part of something that genuinely changes lives.