- Location
- Belgrade
- Type
- Full-time
- Department
- IT
- Seniority
- C-Level
- Closing date
- Today
- Source
- CareersPage
Description
Arise is a globally active weight-loss app with over 10 million downloads and a 4.6 rating on the App Store. Our mission is simple but ambitious: empower millions of people to become healthier and happier.
We're looking for a CTO who is a true architect on both iOS and Android — someone deeply skilled in iOS who can take full ownership of our existing app and raise it further, and who can also build our Android app from scratch. You'll develop primarily through AI rather than by hand, and you'll thrive on ownership, precision, and long-term thinking. This role is for someone who ships high-quality code today while foreseeing how today's decisions shape the app for years ahead — technically, strategically, and financially.
Today Arise is iOS-only, so this is where you'll start and where you'll prove yourself: owning, deepening, and future-proofing a mature codebase used by millions. From there, you'll architect and build our Android app from the ground up.
If you excel at structured, autonomous work, build with AI as your default way of working, understand the importance of monetization, and want to own the technology behind a product used by millions, we'd love to hear from you.
Your Role
- Own and architect the existing iOS app — maintain, optimize, deepen, and future-proof a codebase used by millions.
- Build the Arise Android app from scratch — architecture, delivery, and long-term ownership.
- Ensure cross-platform consistency and a coherent technical vision across both platforms.
- Develop and test features that enhance the Arise experience.
- Use AI agents and automated workflows as your primary means of building, testing, and shipping — not as an occasional helper.
- Anticipate technical pitfalls and proactively design solutions.
- Collaborate with design to refine usability for a smooth user experience.
- Support monetization by integrating features with measurable business impact.
Requirements
- Proven track record architecting and shipping production mobile apps, ideally as a senior engineer, lead, or technical founder.
- Deep, architect-level iOS expertise — you can own a mature codebase end to end and make the hard structural calls with confidence.
- Demonstrated ability to build an Android app from scratch to the same standard.
- Hands-on fluency building through AI — agentic coding tools, LLM-driven workflows, automated testing and release. You've actually shipped this way, not just experimented.
- Excellent problem-solving and critical-thinking skills.
- Comfortable working fully in English.
Technical Skills
- Expert-level iOS/Swift — architecture, patterns, performance, and the judgment to keep a large app maintainable as it grows.
- Strong Android development (Kotlin) with the ability to architect a new app end to end.
- Familiarity with mobile build and release tooling (e.g. Fastlane).
- Deep understanding of Apple and Android design principles, patterns, and best practices.
- Ability to write clean, well-documented, maintainable code — and to direct AI to do the same.
Who You Are
- A decisive builder who takes a problem and runs with it — you'd rather ship and iterate than wait for certainty.
- Direct and results-driven, comfortable owning outcomes and making the call.
- Energized by autonomy and full ownership of the technology.
- Allergic to bureaucracy — "meetings that should have been emails" are your enemy.
Why You'll Love Working with Us
- High autonomy: own the entire tech stack from idea to release.
- Clear decision-making with minimal bureaucracy.
- Work with the newest hardware and technologies.
- Complimentary Claude Max subscription.
- Flexible, remote-first role (full-time).
- Paid annual leave.
- Direct collaboration with the founder — your work will have visible impact from day one.
How to Apply
Send us your application including:
- Your CV
- A history of the mobile apps you've built (iOS and Android)
- Salary expectations
- (Optional) Code samples or GitHub repositories
Help us build and refine a product that runs like a well-oiled machine — and improves millions of lives in the process.