May 1, 2026
Actor Isolation in Swift 6 — @preconcurrency Is Not a Migration Strategy
Most Swift 6 migration guides focus on fixing compiler errors. This one is about the bugs that co...
Read moreRajmani Kushwaha
iOS Tech Lead · Server-driven UI & product-scale architecture · 10+ years, 200M+ users
About
Engineering is easy to do. It's hard to do in a way that scales — with the team, with the codebase, with the organisation.
That's the problem I keep coming back to. Over 10+ years, I've led iOS teams, shaped architecture decisions, and shipped features used by hundreds of millions of people at Target and Tokopedia. But the work I'm most proud of isn't any single feature — it's the engineers I've helped grow, the patterns that outlived my involvement, and the systems that let teams move faster than they could before.
I'm currently leading the List & Registry iOS team at Target. Outside of that, I mentor engineers on Topmate, write about iOS architecture and Swift on this blog, and speak at iOS meetups.
If you're building something interesting in mobile — or just want to think through a hard problem — I'd genuinely enjoy the conversation.
Experience
July 2024 - Present
Senior Software Engineer
Target · Leading List & Registry iOS Team
- Led List 2.0 redesign (10M+ users), achieving 25% engagement lift and 18% increase in item additions
- Architected personalized Registry Gifting features driving 30% higher participation and measurable revenue growth
- Built infrastructure supporting seasonal Wish Lists, enabling 3x faster feature delivery for 200M+ customers
- Migrated to SwiftUI + TCA architecture; established 90%+ code coverage; maintaining 99.8%+ crash-free rate
Feb. 2019 - June 2024
Software Engineer → Senior → Lead Engineer
Tokopedia · Payment & Fintech iOS
- Led iOS team of 4 engineers delivering Payment & Fintech features for Indonesia's largest e-commerce platform (100M+ users)
- Architected Buy Now Pay Later feature driving 25% fintech revenue increase
- Built modularized Campaign SDK for seasonal events, increasing engagement by 15%
- Migrated core architecture to TCA (Redux), reducing critical bugs by 40%
Jan. 2016 - Jan. 2019
Software Engineer
ChicMic Studios & CodeBrew Labs
- Developed iOS applications and games for clients across entertainment, lifestyle, and utility domains
- Built features using Swift, Objective-C, UIKit, and game frameworks (SpriteKit/Unity) for apps with 500K+ downloads
- Contributed to 10+ client projects from concept to App Store deployment
Skills & Technologies
Languages
Swift
Objective-C
JavaScript
HTML/CSS
Python
Frameworks
SwiftUI
Concurrency
Combine
Needle
RxSwift
WatchOS
AsyncDisplayKit
Tools
Tuist
Bazel
Xcode
Instruments
Git
VS Code
Architecture
TCA
Clean Architecture
MVVM
MVP
MVC
SOLID
Education
B.E. in Computer Science
UIET Panjab University, Chandigarh
2012 - 2016
Featured Work
🎯
Target
Senior iOS Engineer working on the Target mobile app, serving millions of users with seamless shopping experiences.
View on App Store
🛒
5 years · Lead Engineer
Tokopedia
Led Payment & Fintech iOS for Indonesia's largest super app — BNPL, e-Pharmacy, Apple Watch, and platform architecture for 100M+ users.
Read the full story
💻
Open Source
Contributing to iOS development community through various open source projects and technical articles.
View on GitHubLatest Writing
All posts →
April 26, 2026
Sendable Migration in a Large Codebase: Mental Models That Actually Help
Sendable migration in a real production iOS codebase isn't a checklist — it's a cascade. Here are...
Read more
April 21, 2026
From State to Screen: A Practical Mental Model of SwiftUI's Rendering Pipeline
Most SwiftUI developers know that 'state drives UI.' What they don't know is everything that happ...
Read moreReady to Work Together?
iOS Tech Lead with a track record of building apps for 200M+ users.
10+
Years Experience
200M+
Users Impacted
10+
Engineers Led
3
Companies