Pratyush Pratik Sinha

Lead Full Stack Engineer - iOS

OWOW

Feb 2025 - Apr 2025 (3 months)

Leading the development of a scalable iOS platform backed by Cloud Firestore and MongoDB, focusing on real-time performance, offline support, and seamless sync experiences. Managing a team of 4 engineers, overseeing architecture, code quality, & cross-functional alignment across backend and iOS modules. Designed the data model & backend flow to ensure low-latency performance & scalable data sync, tailored for dynamic user content. Building robust, modular architecture using MVVM and protocol-oriented programming for maintainable and testable code. Building scalable backend using Firestore, FastAPI, & MongoDB, enabling real-time APIs, async workflows, & flexible data modeling. Driving integration of Swift + Firestore, ensuring smooth bi-dire

Lead Engineer - iOS/macOS

Micro1

Oct 2023 - Nov 2024 (1 year 2 months)

Led a team of 2 engineers and architected a confidential Al-powered iOS/macOS app - a smart sidekick designed to turn user ideas into content through intelligent prompts and generative models. The app leveraged Claude Sonnet and OpenAl's ChatGPT for personalized content generation, tailored using user-specific data. Designed the entire architecture of the app, from client to backend, focusing on scalability, modularity, and performance using Swift, React Native, FastAPI, PostgreSQL, & MongoDB. Implemented modular microservices with Motor, SQLAlchemy, and Pydantic, documented via Swagger and Schemathesis. Applied SlowAPI for rate limiting, Alembic for migrations, and Pytest for test coverage. Designed full-stack architecture with custom auth

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Lead Engineer - iOS

Rizzle

May 2022 - Apr 2023 (1 year)

➤ Rizzle (Rizzle is the most innovative and trending video maker app that lets you unleash your creativity using its unique in-built video editing tools and a collection of over 10000 exclusive templates.) Worked as a lead engineer & team contributor of iOS applications & handling the development of large-scale applications using Swift-5 which follows the agile SDLC. Managed a team of 8 iOS developers, guiding feature planning, architecture decisions, and code reviews to maintain high standards across the board. Built a custom video player using AVFoundation, optimized for low-latency playback and smooth user interaction, tailored for high- performance short videos. Designed and delivered a Swift Package Manager library to allow external cl

Senior Engineer - iOS

Mutual Mobile

Sep 2021 - May 2022 (9 months)

Acted as both a Lead Engineer and hands-on contributor for multiple large-scale iOS applications built using Swift & React Native, while closely collaborating with clients and cross-functional teams in an Agile setup. Led 2 iOS developers, coordinated project execution, and conducted client meetings to align development efforts with business goals. Contributed to EveryParent, an app built for Florida's Children's Services Council of Palm Beach County, helping parents access personalized tips, expert advice, and local resources to support their child's development. Worked on a confidential travel and wellness app, focused on helping users explore the world with confidence through integrated health and wellness services. Collaborated with oth

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IOS Engineer

Gigzoe(Blizzcraft Infotech)

Sep 2018 - Sep 2021 (3 years 1 month)

Gigzoe (A marketplace for micro-business services.) Led the end-to-end development of iOS app a marketplace platform for micro-business services - using Swift & React Native. Built a robust, offline-friendly app using Realm, WebSockets, & Firebase, enabling real-time comm, media sharing, & data sync. Integrated major service providers such as Razorpay, Cashfree, Exotel, Agora.io, and YouTubePlayer, enhancing app capabilities across payment, video calling, and content consumption. Set up Firebase OTP auth, user analytics, and push messaging. Added Facebook/LinkedIn sharing and custom analytics via Google Analytics. Refactored the app to support iOS 13+ only, enabling adoption of modern APIs like UITableViewDiffableDataSource and improved asy

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iOS Developer

Craterzone

Jan 2018 - Jul 2018 (7 months)

CashBackArab (An app designed to generate traffic for major e-commerce platforms across the Arab region and offer cashback rewards to users.) Worked as a solo iOS developer, delivering the entire application using Swift 4 with full client interaction and Agile-based execution. Integrated Facebook login and sharing features for seamless social engagement. Implemented Firebase authentication and messaging to handle user sessions and notifications. Utilized Firebase and Google services for analytics, real-time communication, and backend operations.

SDE - iOS

Code Brew Labs

Jan 2017 - Jan 2018 (1 year 1 month)

Developed multiple small-to-mid scale iOS applications using Swift 3, handling complete end-to-end implementation, client interactions, and Agile SDLC practices. Delivered feature-rich apps across industries including gaming, healthcare, dating, and e-commerce, with a strong focus on real-time communication and social integrations. Key Projects: Gambarlier - A casino-style bar ordering app with an interactive ordering experience. Used RxSwift/RxCocoa for reactive programming and implemented MVVM architecture Built real-time messaging via Socket.IO, and integrated social login (Facebook, Google) Integrated Amazon S3 and various Firebase/Google services Rolomed - An e-commerce healthcare app to manage medical appointments. Used OpenTok and So

Pratyush Pratik Sinha

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