15+
Roseland, NJ · 15+ years in production
Joshua Cleetus
Senior Full Stack Engineer
Product builder across mobile and full stack: Swift and SwiftUI, React Native, Flutter, React, Node.js, and GCP. I founded iOS Code Lab, a training platform used by 10,000+ developers in 100+ countries, and previously shipped products at North, Walmart, Ford, Fisker, PepsiCo, and Orangetheory.
- Swift / SwiftUI
- React Native
- Flutter
- React
- Node.js
- GCP
10k+
$25M+
10M+
Featured products
Ten shipped apps.
Training software, payments, retail, automotive, and health: native, cross-platform, and full-stack. Select a product for details and the App Store or website link; the long version is in experience below.
Tap an app to open it.
Founder product
iOS Code Lab
A full-stack Swift training platform: browser-based editor with live execution, 77+ DSA problems, system design prep, AI-powered code review, and a Stripe subscription model that grew organically to 10,000+ developers.
- React
- Node / Express
- GCP Cloud Run
- Firebase
- WebSockets
- Stripe
Featured role
A training platform used in a hundred countries.
iOS Code Lab is the product I designed, built, and still operate: React on the front, Node and Express APIs, Dockerized services on Google Cloud Run, Firebase for auth and data, and a Swift editor that compiles over WebSockets.
Founder & Full Stack Engineer · January 2026 to Present · Remote
10,000+
100+
77+
Product
Shipped ioscodelab.com as a complete SaaS: editor, interview prep, community, and paid tiers.
Realtime
Browser-based Swift editor with live code execution over WebSockets (no local Xcode required).
Cloud
React, REST APIs, Cloud Run, Docker, and Firebase for authentication and data.
Growth
AI-powered code review and a Stripe Free / Pro / Pro+ model with organic acquisition.
North · Payanywhere
Apple Tap to Pay, among the first U.S. rollouts.
At North I architected Apple Tap to Pay for Payanywhere POS, then led a team of 15 through the payment surface: card readers, kiosk and mobile UI, and the native bridges that kept iOS and Android moving together.
Senior Developer / Architect · January 2023 to May 2025 · Troy, MI
$25M+
40%
30%
40%
Experience
Roles, shipped in order.
Case-study blocks from the current work back through the first products I took to the App Store.
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iOS Code Lab
Founder & Full Stack Engineer
Designed and shipped a full-stack training platform used by 10,000+ developers in 100+ countries. React, Node.js / Express, REST APIs, Google Cloud Run, Docker, and Firebase. Live Swift execution over WebSockets, 77+ DSA problems, system design prep, interactive courses with certificates, AI-powered code review, and a Stripe Free / Pro / Pro+ model.
ioscodelab.com -
Baby Brezza
Mobile Applications Engineer · Flutter
Building cross-platform Flutter apps for Baby Brezza’s consumer product line, shipping shared iOS and Android experiences from one codebase. Collaborating with product and engineering on features, releases, and connected-product workflows.
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North (Nabancard) · Payanywhere
Senior Developer / Architect
Architected Apple Tap to Pay for Payanywhere POS, among the first U.S. rollouts, processing $25M+ in quarterly transactions and reducing hardware reliance by 40%. Shipped React Native (Redux) modules with native Swift / Objective-C bridges. Owned architecture for POS, card readers, and payment flows; optimized queries and rendering for kiosk and mobile. Led and mentored a team of 15; improved delivery velocity by 30% and reduced crash rate by 40%.
Payanywhere on the App Store -
Walmart
Senior Engineer
Developed Walmart+ features in SwiftUI, React Native, Combine, and VIPER for 60+ stores and millions of customers. Improved authentication, analytics, and in-app engagement for experiences serving 10M+ users. Built real-time UI updates and location, Bluetooth, and camera flows with Combine, Core Location, Core Bluetooth, and AVFoundation.
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Fisker
Senior Engineer
Built the Fisker EV app’s telematics: remote vehicle state, geolocation, and sensor-driven tracking. Led the migration to SwiftUI and MongoDB, improving data consistency and performance. Evolved architecture for multiple authentication flows, account management, and service integrations, and mentored junior engineers.
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Ford
Senior Engineer
Developed FordPass remote vehicle controls (start / stop, lock / unlock, locate, and status) backed by telematics and telemetry APIs. Built a React-based internal dashboard to visualize and debug telematics data during integration. Partnered with QA and DevOps on CI/CD pipelines and automated testing.
FordPass on the App Store -
PepsiCo
Team Lead
Led a team of 10 engineers and migrated the internal Xcelerate app from Windows to iOS, improving performance and adoption. Designed Core Data caching strategies and managed Agile delivery across product, QA, and engineering.
MyPepsiCo on the App Store -
Orangetheory Fitness
Senior Developer / Architect
Designed OTCoach, a unified Apple Watch, iPhone, and iPad app for real-time class control across 125+ locations. Optimized concurrency with DispatchQueue / NSOperationQueue and shipped Apple TV plus localization.
Orangetheory on the App Store -
Romio
Lead Developer
Built the Romio iOS app from scratch through App Store launch, including reusable platform components and backend-facing integrations.
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Love the 88
Software Developer
Built Tagrigator, BeUrSelfie, and Yooka from scratch, owning both frontend and backend (REST / JSON APIs) through App Store release.
Approach
The interesting problems sit between product and platform.
I take architecture from data and APIs through UI, payments, and CI/CD. Fifteen years of shipping taught me that the work that lasts is the work other engineers can build on: reusable SDKs, honest telemetry, and systems that stay up when the volume shows up.
That looks like Tap to Pay on a POS, reusable mobile SDKs, telematics you can debug from a React dashboard, and a Swift editor that actually runs in the browser. Outside the day job I write, teach, and keep shipping my own products. I am also pursuing an MS in Artificial Intelligence at the University of Colorado Boulder.
- Product Scope, trade-offs, and the subscription loop.
- Mobile Swift, Flutter, and React Native in production.
- Full stack React, Node, REST / GraphQL, and GCP.
- Leadership Teams of 10 to 15, architecture, and delivery.
Skills
The stack, grouped the way I actually use it.
Languages
- TypeScript
- JavaScript
- Python
- Swift
- Kotlin
- SQL
- C++
- Objective-C
Frontend
- React
- React Native
- HTML / CSS
- SwiftUI
- Flutter
- UIKit
Backend
- Node.js
- Express.js
- REST APIs
- GraphQL
- WebSockets
Cloud & DevOps
- Google Cloud Run
- Firebase
- Docker
- AWS
- Azure DevOps
- Jenkins
- CI / CD
- Git
Mobile
- SwiftUI
- UIKit
- Combine
- React Native
- Flutter
- Core Location
- Core Bluetooth
- AVFoundation
- Apple Watch
- Telematics
Payments & Auth
- Stripe
- Apple Tap to Pay
- OAuth 2.0
- JWT
- Encryption
- Secure Enclave
- ATT / SKAdNetwork
- Biometrics
Architecture
- MVC
- MVVM
- VIPER
- Modular / clean architecture
- SDK design
- MongoDB
- MySQL
- Core Data
Book
Cast Your Worries Away
A book by Joshua Cleetus, available on Apple Books, Kindle, and paperback.
Education
In progress
Master of Science, Artificial Intelligence
University of Colorado Boulder · from 2026
Bachelor of Technology, Mechanical Engineering
Cochin University of Science and Technology, India · 2002 to 2006
Contact
Ready to build the next one.
Open to interesting product and engineering work: full stack, mobile, or the messy middle where they meet. If you want the architecture, the trade-offs, or the long version of any role, write me.