Sameer'sWorld
A whimsical, mostly pointless, occasionally impressive record of one person. Engineer, golfer, skier, cook, reader. Look around.
Duolingo
Scroll in. It takes over.
A Pokémon-style map of my actual life: my apartment, Needwood, the Thai place, the office. Walk around and talk to things.
Achievements unlocked
Six years of iOS in places where the app can't go down. The tiles open. The numbers are real.
Joined the owlDuolingo · iOS Engineer · 2026 – now Now▾
- iOS engineer at Duolingo since 2026. More as it unlocks.
Ran the checkoutSquare · Senior iOS Engineer, Checkout Platform · Aug 2022 – May 2026 $15B / mo▾
- Core engineer on the iOS checkout behind ~87% of Square POS volume: ~835M checkouts a month.
- Hardware-aware payment flows across NFC, chip, swipe, Tap to Pay on iPhone and Bitcoin, reacting to offline mode and reader state. Average processing time down 19%.
- Offline-first persistence on encrypted Core Data: unrecoverable failures from ~50/day to near zero, default-on offline payments for ~4M sellers.
- Opened the last supported region on the iOS payments rail. Orders API adoption 28% → 96% across 8.8B checkouts.
Built the HR app's spineSAP SuccessFactors · iOS Engineer · Nov 2019 – Aug 2022 3 yrs▾
- Reusable Swift data models and networking for a global enterprise HR app.
- Unit, UI and integration suites that made releases boring, in the good way.
- Threading, memory and data handling across complex workflows; multi-release roadmaps with product and backend.
Fear the turtleUniversity of Maryland · B.S. Computer Science CS▾
- College Park. Testudo's nose has been rubbed.
I build things for people. The kind of engineer who obsesses over the user experience as much as the architecture. Right now I'm deep in the AI space, and it's the most fun I've had engineering in years.
My home screen
The apps and tools I make on the side. Tap an icon.
PokéTrack
A Pokémon TCG collection tracker for iOS. Sealed, sets, loose, graded.
- Portfolio valuation, set-completion hunting, sold archive with realized P&L.
- On-device scan-to-add for slabs and raw cards, using perceptual hashing.
- Pack-rip ROI, a misc-spend ledger, and a Collectr CSV importer.
Snoopy
An open-source macOS network inspector for the iOS Simulator.
- See every request and response, including HTTPS bodies, with close to zero setup.
- Hooks URLSession before TLS, so it works even when the app pins certificates. No proxy, no CA.
Z-Mail
A Generation Z email client. Native iOS, Gmail, a little judgmental.
- Multi-account Gmail with OAuth 2.0, labels, stars, rich HTML or plain text.
- LLM-powered summarization and offline persistence.
Generative UI
Claude designs native interfaces at runtime through a constrained DSL.
- 14 node types the LLM outputs as JSON; the framework renders real SwiftUI or Jetpack Compose.
- Grocery lists, weekly plans and dashboards from a sentence.
PokeScanKit
A perceptual-hash image-matching kit, with a Pokémon-card-aware layer.
- 64-bit DCT pHash for any image, a binary lookup DB, Hamming-distance queries.
- Reusable for any tagged catalog: Magic, sneakers, art prints.
Job Skills
Four Claude skills that turn it into a job-search co-pilot.
- Analyze a posting against your resume, crawl careers pages, fill applications, find referrals.
Assistant
A local-first CLI that reasons over email, messages and browser history.
- Gmail, iMessage and WhatsApp fetch and summarize; vector search; a relationship graph; reply drafts with approvals.
Sameer's World
A Pokémon-style pixel art game that is actually a diary.
- 12 rooms, a golf course with a putting minigame, one NPC who plays pretend mean.
- Vanilla JS and Canvas. No frameworks, no build step.
Life, lately
The things that keep me balanced outside of code. Every date and place comes from the photo itself.
Currently
Updated by hand for now. Soon: pulled from each app on a schedule.
The journal
Sameer's World: Building a Pixel Art Diary of My Life
I built a Pokemon-style pixel art game that's actually a visual journal of my life — my apartment, my golf course, my favorite restaurants, and the people I care about.
Read→ AIApr 2 2026 · 12 min readBuilding Generative UI: How I Got an LLM to Design Native Interfaces
A deep dive into building a system where Claude generates native SwiftUI and Jetpack Compose layouts at runtime through a constrained JSON DSL and agentic tool use.
Read→ AIFeb 20 2026 · 2 min readGenerative UI: What Happens When SwiftUI Meets an LLM
I explored whether an LLM could generate native SwiftUI at runtime. Instead of runtime code compilation, I designed a DSL approach that actually works.
Read→