Chintan Patel, Developer in Ahmedabad, Gujarat, India
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Chintan Patel

Bio

Chintan is an iOS Developer with 17+ years of experience and has shipped 25+ apps with 15 million+ installs combined. Top clients include sovereign wealth funds like $900B+ AUM PIF Saudi Arabia and leading consumer apps like Cal AI, MyFitnessPal. He has extensive experience working on communication, finance, secure crypto wallet apps, AI-powered apps etc. He also has considerable NodeJS experience having worked on Cal AI server and a private app with 1.7 million registered users.

Portfolio

Public Investment Fund
Design Systems, Swift, SwiftUI, Figma, Mobile Development, Design Thinking, iOS...
Cal AI
Swift, SwiftUI, Artificial Intelligence (AI), A/B Testing, Node.js, LangGraph...
SynapX Health
iOS, Large Language Models (LLMs), HealthKit, Apple HealthKit...

Experience

  • iOS - 16 years
  • Interface Builder - 14 years
  • Xcode - 14 years
  • UIKit - 14 years
  • Swift - 7 years
  • Objective-C - 6 years
  • Firebase - 4 years
  • SwiftUI - 3 years

Preferred Environment

MacOS, GitHub, Git, iOS, Xcode, Swift, Objective-C, UIKit, SwiftUI, Artificial Intelligence (AI)

The most amazing...

...app I have developed is Cal AI Calorie Tracker which became #1 Most Downloaded Health & Fitness app and got acquired by MyFitnessPal for $100 Million Dollars.

Work Experience

iOS Developer for Investment Institution

2025 - PRESENT
Public Investment Fund
  • Developed WhatsApp-like chat interface with features like photo & video drawing, cropping, editing, adding emojis, stickers etc.
  • Created PDF editor interface to allow annotations on large PDFs of more than 500 MB & 500 pages while keeping RAM consumption and performance of the app stable. Involved heavy performance optimisation.
  • Developed Chatbot component for internal enterprise deployment which allows employees to get quick answers from corporate knowledge base.
  • Developed employee tracking system which allows managers to respond to employee leave requests, track attendance, work allocation etc.
Technologies: Design Systems, Swift, SwiftUI, Figma, Mobile Development, Design Thinking, iOS, User Interface (UI), Mobile, Artificial Intelligence (AI), AI Chatbots, PDF

Senior iOS Developer

2025 - 2026
Cal AI
  • Conceptualised, designed and developed Wrapped 2025 showcasing user's year in terms of app activity.
  • Developed & maintained mission critical payments system for both Stripe and Apple In-App Purchase StoreKit Payments for both Individual and Family Plans.
  • Developed AI-powered features for CI/CD pipeline which significantly reduced time spent on manual processes by entire development team.
  • Point-of-contact "go to guy" for all development-related questions from other teams like QA, Business Intelligence, Customer Support etc.
  • Shipped fast without breaking things by having 99.99% crash-free users despite weekly feature-heavy releases.
Technologies: Swift, SwiftUI, Artificial Intelligence (AI), A/B Testing, Node.js, LangGraph, LangChain, LangSmith, Firebase

iOS Developer

2024 - 2025
SynapX Health
  • Developed MVP for a healthcare app powered by AI for senior citizens.
  • Developed iOS app UI using client's Figma designs.
  • Gave suggestions to clients about iOS development best practices.
Technologies: iOS, Large Language Models (LLMs), HealthKit, Apple HealthKit, Mobile App Development, Mobile Applications, Back-end Development, Swift, Web Applications, Web Development, HTML, CSS, JavaScript, Node.js, ChatGPT, OpenAI, Firebase, Artificial Intelligence (AI), APIs, Supabase, Software Architecture, Early-stage Startups, Minimum Viable Product (MVP), SwiftUI, ChatGPT API, Async/Await, Model View ViewModel (MVVM), Asynchronous Programming, Networking, User Experience (UX), Prompt Engineering, RESTFul APIs, TypeScript, Realm

iOS/Swift Developer

2024 - 2024
Proton
  • Took over a project in critical condition from a previous developer and worked hard and fast to improve the project architecture and performance by fixing bugs and implementing Swift/SwiftUI best practices.
  • Managed another iOS developer and oversaw his work with code review before integrating it into the main project.
  • Converted client's Figma designs to SwiftUI for new features.
Technologies: Swift, iOS, PSD to Swift, Instant Messaging, SwiftUI, Figma, Apple HealthKit, Web Development, Web Applications, HealthKit, CTO, Low-level Programming, Software Architecture, Messaging, Async/Await, Combine, Asynchronous Programming, Networking, Asynchronous Data Streams, Real-time Data, User Experience (UX), Teaching, RESTFul APIs, Optimization, Realm

iOS/Swift Developer

2024 - 2024
Freelance Client
  • Developed a secure, real-time messaging app for iOS using SwiftUI and XMPP within a tight deadline by taking over work from a previous developer. Rapidly worked on adding new features and fixing existing bugs in the project.
  • Converted Figma design mockups provided by the client to an iOS app.
  • Assumed a tech lead role by reviewing and merging other developers' code into the main branch.
Technologies: Swift, iOS, PSD to Swift, Instant Messaging, SwiftUI, Encryption, Security, Mobile Architecture, iOS SDK, APIs, Mobile, REST, Mobile App Development, Mobile Development, Web Development, Web Applications, CTO, Software Architecture, Messaging, Minimum Viable Product (MVP), Combine, Asynchronous Programming, Networking, Asynchronous Data Streams, Real-time Data, User Experience (UX), RESTFul APIs

Senior iOS Developer

2012 - 2024
Freelance
  • Developed a patient/doctor encrypted communication app using Parse as a back end. I built both the iOS app and the back end.
  • Developed LoveArt, a greeting cards app that became the number one free app overall in Spain and number two in France and Brazil.
  • Developed Greets, another greeting cards app that enables users to share custom animated GIFs as greeting cards for various occasions to friends via Facebook, Twitter, and email.
  • Built Talking Puppy and Talking Santa, two apps that repeat spoken words in funny voices and allow users to export the audio/video to YouTube or the phone gallery.
  • Published an iOS app that reached 1.7 million registered users at its peak. I developed both the iOS app and the back end.
Technologies: Objective-C, Mobile Applications, Architecture, Firebase, Node.js, Geolocation, Google Geocoding API, Geocoding, Mobile Architecture, iOS SDK, RevenueCat, APIs, Mobile, REST, Single Sign-on (SSO), Mobile App Development, Full-stack, Mobile Development, Web Development, Web Applications, Artificial Intelligence (AI), CTO, Supabase, Assembly, Software Architecture, Async/Await, Model View ViewModel (MVVM), Asynchronous Programming, Networking, User Experience (UX), UIKit, Swift, SwiftUI, Prompt Engineering, RESTFul APIs, Optimization

Senior Software Engineer

2010 - 2012
Gateway Technolabs Pvt. Ltd.
  • Developed a 3D game for iOS using the SIO2 3D game framework.
  • Worked onsite in South Africa for 16 months creating a text/voice messaging app aiming to replace the need for traditional SMS.
  • Developed TouchPoint, a survey management application for large corporations whose clients include US Army, US Navy, Amazon, Accenture, Bank of America, and more.
  • Developed Sears Catalogues for Sears Canada, enabling users to browse the entire Sears Catalogue on iPad.
  • Mentored new employees in iOS development by conducting training sessions for iOS development best practices, including how to be productive using Xcode, version control management, etc.
  • Developed a citizen journalism app and SDK for Filemobile that enables users to report incidents of interest by capturing audio, video, and text and uploading to a server.
Technologies: Mobile Applications, Architecture, Geolocation, Geocoding, Mobile Architecture, iOS SDK, Mobile, REST, Mobile App Development, Mobile Development, Tutoring, Training, Teaching, RESTFul APIs

Software Engineer

2009 - 2010
Elan Technologies Ltd.
  • Estimated the time and cost requirements of iOS apps based on client specifications.
  • Developed a wireless file sharing app for iPhone that reached the Top 20 for free business apps on the App Store.
  • Developed Foursight, an iOS game for 2 players featuring AI logic design for playing against a computer, push notifications for playing over the internet, and bluetooth support for 2 player local gameplay.
  • Conducted training sessions for new employees to train them in various iOS technologies such as Core Data, UIKit, Core Location, etc.
Technologies: Objective-C, Mobile Applications, Geocoding, Mobile, Mobile App Development, Mobile Development, RESTFul APIs

Software Engineer (Trainee)

2008 - 2008
Infosys Technologies Ltd.
  • Received training in C language, RDBMS, Java, JSP, HTML, CSS, JavaScript, and more to prepare for a career in the software industry.
  • Created a courier tracking system for a courier company involving use of the Oracle database, JSP, HTML, CSS, and JavaScript.
  • Oversaw documentation, code quality checks to make sure they adhere to company guidelines.
Technologies: JavaScript, CSS, HTML, Oracle, Jakarta Server Pages (JSP), Java, RDBMS, Unix, C

Experience

Greets

A fun app for sending animated greeting cards for all occasions and the app had custom animated stickers for various greeting occasions such as birthdays, anniversaries, etc. where the user could add his message in an animated GIF. The app would send a request to the server and create a customized GIF with the user's message.

Jukio

An app whose mission is to establish a musical democracy by crowdsourcing party playlists. It has been featured on TechCrunch, BBC radio, etc. The app was based on radio API, a music streaming service, and we added our back-end magic on top of that.

Sears Catalogue

This is an app for the Canadian App Store that allows users to browse the Sears Catalogue on the iPad. The Sears Catalogue is a renowned shopping list promoted by Sears and updated every Christmas. This app allows users to browse the catalog digitally, which was once a physical catalog.

TouchPoint | Business

A B2B application for companies, organizations, and institutions to collect feedback from their customers and employees, where the clients include Fortune 500 companies such as Amazon, Accenture, and Bank of America and government institutions such as the US Army, US Navy, and more.

Vexx SMS

A WhatsApp-like cross-platform voice and text messaging client developed in South Africa, striving to eliminate the need for traditional SMS.

The app was developed on multiple platforms, including iOS, Android, Blackberry, and Windows Mobile. I built the iOS app from start to finish.

Foursight

An “easy to learn, hard to master” board game with an original concept. It can be played against the computer or other players. This game had multiple paying modes, including computer, another player online, vs. another player on local wifi, and another player via Bluetooth.

Talking Santa

An entertainment app that mimics phrases said by the user in a funny tone.

LoveArt

A postcards app with uniquely designed original postcards to express love for someone and it has been ranked the #1 overall free app in Spain and #2 in France and Brazil.

Property Register

An app developed to provide an easy way for real-estate clients to keep track of various property listings and to collect contact information/feedback from visitors in a property show.

WiFi HD FREE (Wireless Hard Disk Drive)

https://itunes.apple.com/app/id311170976
An app that turns your iOS Device into a wireless pen drive, where it transfers files to/from an iPhone wirelessly over WiFi and ranked in the Top 10 for free business apps in the US App Store.

Motivator

An app helping people to quit smoking by allowing them to keep track of their progress.

EIE Legal Messaging

An encrypted messaging app with features such as restricting access based on location via geo-fencing, printing conversations, sending photos, videos, audio, stickers, etc.

It is a secure communication app based on Firebase, geolocation, and iOS SDK for communication between small groups like lawyers in law firms, doctors at hospitals, etc.

Call Recorder

A call recording app for iPhone that allows you to record important calls to listen again later; it is an ideal app for recording phone interviews, lengthy explanations, advice from doctors/lawyers, etc.

I designed and developed the entire app from scratch and was the sole designer/developer who worked on it.

The app is rated on the App Store with a 4.6 stars average and 2,300+ ratings.

AskWHS

A ChatGPT-powered app to ask questions about Worker Health & Safety (WHS) for the state of New South Wales in Australia where I was the sole developer in charge of developing the iOS app and the back end based on Node.js and the app used OpenAI API securely using Node.js back-end to stream responses to the iOS app while avoiding exposing the OpenAI API key to the iOS client.

Education

2004 - 2008

Bachelor's Degree in Mechanical Engineering

VVP Engineering College - Rajkot, India

Skills

Libraries/APIs

Parse SDK, iOS Native Libraries, REST APIs, Facebook iOS SDK, X (formerly Twitter) SDK, Google Geocoding API, Firebase iOS SDK, AudioKit, HealthKit, RNCryptor, Node.js, Plivo

Tools

Xcode, Instruments, Interface Builder, iOS Simulator, TestFlight, OneSignal, ChatGPT, Geocoding, Apple HealthKit, Git, GitHub, ShowKit, Figma

Languages

Objective-C, Swift, Assembly, TypeScript, C, Java, HTML, CSS, JavaScript

Frameworks

Core Location, Cocoa Touch, UIKit, SwiftUI, iOS SDK, AFNetworking, MapKit, Core Data, StoreKit, Combine, Jakarta Server Pages (JSP), Core Bluetooth, LangGraph

Paradigms

Object-oriented Programming (OOP), REST, Mobile Development, Model View ViewModel (MVVM), Asynchronous Programming, Testing, HIPAA Compliance, Functional Programming, Pair Programming, Agile Software Development, Mechanical Design, Design Thinking

Platforms

iOS, Parse, Firebase, RevenueCat, Mixpanel, Mobile, Unix, Oracle, MacOS, Parse Server, LangSmith

Storage

Cloud Firestore, Google Cloud, Realm, RDBMS, SQLite

Industry Expertise

Teaching

Other

AVFoundation, Mobile Applications, Architecture, Instant Messaging, Mobile Architecture, OpenAI GPT-4 API, OpenAI, APIs, Mobile App Development, Full-stack, API Integration, Email, Mobile Apps, Large-scale Projects, Social Networks, Artificial Intelligence (AI), CTO, Supabase, Front-end, User Interface (UI), Software Architecture, Early-stage Startups, Messaging, Minimum Viable Product (MVP), Async/Await, Networking, Subscriptions, A/B Testing, Growth, Asynchronous Data Streams, Concurrency, Data Modeling, Real-time Data, User Experience (UX), Minimum Marketable Product (MMP), Tutoring, Prompt Engineering, Training, RESTFul APIs, Optimization, Design Systems, Video Editing, Image Manipulation, Geolocation, Single Sign-on (SSO), iOS Video, Back-end Development, Web Development, Web Applications, Low-level Programming, Payment APIs, Full-stack Development, ChatGPT API, Apple Human Interface, Geolocation Detection, PSD to Swift, Encryption, Security, Mechanical Engineering, Large Language Models (LLMs), Bluetooth, AI Chatbots, PDF, LangChain

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