Jatin Shrivastava | Mobile Engineer

Who I am

About Me

iOS Engineer with 4+ years shipping production mobile applications across enterprise, healthtech, and B2B SaaS — on native iOS, Android, and Flutter.

At Paycom, I work on the ESS iOS app serving 200k+ enterprise users, contributing to complex system architecture, concurrency modernisation, and comprehensive test coverage.

Previously at Athmin Technologies, I shipped 5 production apps to the App Store and Play Store across healthtech, proptech, and B2B SaaS, collectively reaching ~1.6M downloads.

✦ Currently building DailyRobe — AI-powered iOS wardrobe app · CoreML & Vision framework

4+

Years Experience

200k+

Enterprise Users Served

~1.6M

App Downloads Reached

Career

Experience

Paycom

Irving, TX

Software Developer IV

Full-Time May 2024 – Present

Architected offline-first background sync using BGProcessingTask and Core Data, enabling full app functionality without network connectivity for 200k+ enterprise users
Contributed to migration from GCD to Swift async/await, refactoring assigned modules to eliminate race conditions
Developed features following MVVM + Repository + Coordinator architecture across a large-scale enterprise iOS codebase
Contributed to UI test coverage using Robot pattern (XCTest), adding 80+ test commits; resolved iOS 18 keyboard regression and Core Data merge crashes
Maintained GitLab CI/CD pipeline with Fastlane; delivered 407 commits with 20% testing commit ratio
Mentored 5 interns through CRM app delivery; captained team to Most Innovative Project award + individual MVP at codeathon

Software Development Intern

May 2023 – Aug 2023

Designed interactive geofence configuration tool using MapKit with circular and polygon overlays and draggable vertex controls
Built automated punch testing engine using CLLocationManager; persisted sessions with Realm and surfaced accuracy metrics via Swift Charts

Athmin Technologies

Noida, India

Member of Technical Staff (MTS-1 → MTS-2)

Full-Time Jun 2020 – Jul 2022

Shipped 5 production iOS and Android apps in healthtech, proptech, and B2B SaaS — collectively reaching ~1.6M downloads
Built core Illuminate Health features: medication management, real-time WebSocket chat, APNS/FCM push, AWS Cognito/S3/Lambda
Resolved critical RealmSwift threading crash (RLMException) in production — traced and fixed using write transactions
Architected VoIP calling: PushKit → CallKit → Flutter Method Channel → Jitsi Meet SDK across iOS and Flutter
Built Pronnel CRM: WebSocket live updates, Universal Links deep linking, AWS S3 filesystem with versioning

Anant Jigyasa Education Foundation

Greater Noida, India

Software Development Intern

Jun 2019 – Nov 2019

Built full-stack Django web app with SQL database, mobile-optimised frontend, and backend API integration

Work

Featured Work

Personal projects and professional product contributions.

Personal Projects

DailyRobe

AI-Powered Wardrobe iOS App

Publishing Soon

An on-device ML pipeline using CoreML and Vision framework — DeepLabV3 semantic segmentation for clothing background removal and FastViT Vision Transformer for feature extraction. Custom computer vision algorithms for color detection (radial center-weighted HSL sampling) and pattern classification (variance + edge transition analysis). Multi-tier ML fallback system ensuring 100% processing success rate.

Swift SwiftUI CoreML Vision SwiftData DeepLabV3 FastViT Core Image Core Graphics GCD

📝~2,600 lines of Swift

📱17+ SwiftUI Views

🔒Zero third-party dependencies

🧠Fully on-device ML inference

⚡100% processing success rate

Professional Product Contributions

Illuminate Health

Native iOS & Android Healthtech Product

Built at Athmin Technologies

Live on App Store & Play Store

Contributed to medication management, drug interaction workflows, real-time WebSocket chat, APNS/FCM notifications, Jitsi video calling, and AWS Cognito/S3/Lambda integrations.

Swift Java WebSockets Firebase AWS Realm

Pronnel CRM

Flutter B2B SaaS Application

Built at Athmin Technologies

Live on App Store & Play Store

Contributed to WebSocket live dashboard updates, Universal Links deep linking, AWS S3 file versioning workflows, and VoIP calling via PushKit, CallKit, and Flutter Method Channel bridges.

Flutter Dart WebSockets AWS S3 CallKit PushKit Deep Linking

Hopfirst

Flutter Logistics Application

Built at Athmin Technologies

Live on App Store & Play Store

Built shipment inquiry, freight tracking, trip status, and driver/vehicle detail flows for a logistics app serving the alcoholic beverage transport workflow.

Flutter Dart Logistics Tracking Mobile UX

TextToPPT

Django Web Application

Web App

Built a Django web app that converts WhatsApp exported chat files into PowerPoint presentations using a custom conversion library published on PyPI.

Python Django SQLite PyPI

GIIS Circular

School Communication Portal

Web App

Built a parent-school circular and query management portal with status tracking and SQLite-backed storage for notices, students, staff, and threaded messages.

Django Python SQLite Bootstrap

IMachineries

Bootstrap Product Portfolio Site

Website

Designed and built a product showcase website for Innovative Machineries Agro India Pvt Ltd. with a responsive Bootstrap frontend.

HTML CSS Bootstrap Responsive UI

Toolkit

Skills

Technologies and frameworks I work with regularly.

Mobile

SwiftSwiftUIUIKit KotlinFlutterDart

Architecture

MVVMRepository Pattern CoordinatorDependency Injection

Concurrency

async/awaitCombine GCD@MainActor BGProcessingTask

AI / ML

CoreMLVision Framework DeepLabV3FastViT

Apple Frameworks

Core DataSwiftData Core LocationMapKit BackgroundTasksCallKit PushKit

Real-time

WebSocketsMQTT VoIP PushAPNS FCM

Testing

XCTestUnit Testing UI TestingRobot Pattern Mock Injection

Tools & Cloud

XcodeFastlane GitLab CI/CDSwiftLint FirebaseAWS S3 AWS CognitoAWS Lambda

Recognition

Awards

🏆

MVP Award

Paycom Codeathon · Individual

2025

🥇

Most Innovative Project

Paycom Codeathon · Team

2025

🥈

2nd Place

Paycom Codeathon · Team

2024

⭐

Outstanding Performance

Athmin Technologies

2021

Background

Education

MS

University of Texas at Arlington

Master of Science in Computer Science

Aug 2022 – May 2024

Focus Areas

Distributed Systems Algorithms Software Engineering

B.Tech

Dr. A.P.J. Abdul Kalam Technical University

Bachelor of Technology in Computer Science

Jul 2016 – May 2020

Focus Areas

Operating Systems Data Structures Python

Get in touch

Let's Connect

Hiring for iOS, mobile platform, or cross-platform product engineering? Reach out if you want someone who has shipped at scale and cares about architecture, performance, and polish.

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