Developer, QA engineer, and the person running the project.
I am an experienced mobile app developer specialising in iOS and Flutter. I have supported the entire application lifecycle — concept, design, build, testing, release and support — for clients from early-stage startups to established enterprises.
My technical work covers native iOS in Objective-C and Swift, Flutter, UI/UX implementation, and integrating whatever APIs and services the product needs — increasingly AI and ML features, and web apps in whatever stack fits. I work AI-assisted day to day, with Claude Code, Codex and a DeepSeek harness in the loop, and review every line they produce. The rest of the toolkit is Xcode, GitHub, and the database layer that fits the problem.
Before development became full time I spent five years in QA. That is why my releases tend not to come back: I still test my own work the way an adversarial tester would, and I write the regression list before I write the feature.
Skills & expertise
Full service list- iOS native development (10+ years)
- Swift 5.6 & SwiftUI 3.0
- Objective-C
- Android native (Kotlin) & Flutter
- Websites & web apps in any stack
- React, Next.js, Node & Firebase
- UI/UX implementation
- REST / JSON / SOAP / XML
- SQLite & Core Data
- Firebase, Firestore & Cloud Functions
- HTML, CSS & TypeScript
- Cocoa Touch framework
- Xcode 9.3 – 16.1
- LLM APIs, Core ML & ML models
- GitHub & BitBucket
- Android Studio
- Agile development
- UI testing
- App optimisation
- Claude Code, Codex & DeepSeek harness
Experience
See selected work- June 2020 — Present
Mobile App Developer
ITRONIX Solutions · Punjab, India
Supporting the entire application lifecycle from concept to deployment. iOS apps in Swift and Objective-C, API integration and performance work. Projects include ED (Education AI), Therapeutic Outcomes, Lotus Health and Wellness, and MoreBass.
- May 2019 — Present
Freelance Developer, Technical PM, QA Engineer & Architect
Self-employed
Full-featured mobile apps for clients worldwide, handling design, development, testing and deployment. Projects include MoreBass, Karma Social Media (Flutter), Co-Parents, Tissimo, Ramaq and Hotwear.
- May 2019 — May 2020
iOS Developer
Macrew Technologies · Mohali, Punjab, India
iOS applications in Swift and Objective-C for agency clients — PromoSpy, RateLuLu and OnTrack Event Management — with a focus on clean code and optimal user experience.
- Dec 2017 — Apr 2019
Structural Draftsman / iOS Developer
INDEX TRADING CO. W.L.L, Kuwait & FlipTap (part-time)
Shop drawings for precast structures, and in parallel part-time iOS work at FlipTap building a QR-based payment application.
- June 2017 — Nov 2017
Mobile App Developer
ITRONIX Solutions · Punjab, India
Mobile applications including Magento e-commerce, Time Express Parcels and Shelf Cosmetics, built in Objective-C and Swift.
What people say
All testimonialsHarjot’s ability to understand our vision and transform it into functional mobile applications exceeded our expectations. His technical expertise in iOS development and attention to detail made our projects a success.
Working with Harjot at Macrew Technologies was an absolute pleasure. His clean code, innovative solutions and dedication to meeting deadlines made him an invaluable asset to our team.
Harjot developed our CoParent iOS app with exceptional skill and professionalism. His attention to user experience and ability to implement complex features seamlessly resulted in an app that exceeded our expectations.
His versatility as an iOS developer, technical project manager and QA engineer has been instrumental to OnTrack Tech Group’s success. He is a rare talent who excels in multiple technical roles.
Have an app or
a site to build?
Tell me what you are building and I will come back with a plan, a timeline and the trade-offs — usually within one business day.
Start a project