Mobile app development
Build and maintain the whole mobile product, from app UI and backend APIs to payments, release, and production support.
Native iOS delivery
SwiftUI/UIKit apps shaped from design, APIs, and product requirements.
Mobile product ownership
App flows, backend APIs, and ongoing development connected end to end.
Payments & monetization
StoreKit 2, credits, paywalls, Stripe, Apple Pay, and checkout recovery.
Launch stabilization
Inherited apps, crash fixes, release blockers, and App Review-ready cleanup.
How I can help
Build, rescue, launch, and maintain your mobile product, with deep native iOS expertise and ownership beyond the app.
Native iOS development
My deepest specialization: Swift, SwiftUI, UIKit, Apple frameworks, and SDKs, from implementation through TestFlight and App Store delivery.
App rescue & modernization
Stabilize inherited apps, fix crashes and broken flows, modernize legacy code, and remove the blockers between your product and launch.
Payments & monetization
Build and repair StoreKit purchases, subscriptions, entitlements, and credits, plus Stripe, Apple Pay, and checkout recovery.
Mobile backend & API integration
Connect mobile apps to backend services, REST APIs, notifications, analytics, and cloud workflows, with reliable state across the system.
AI feature integration
Turn AI APIs into useful mobile features with native UX, backend integration, saved results, usage limits, payments, and clear failure handling.
Selected client outcomes
Recent work chosen for the kinds of client problems it proves: launch risk, AI API integration, payments, entitlement logic, mobile/backend delivery, and App Store readiness.
Blackville
Stabilized checkout and launch flow for a live marketplace.
Stabilized an inherited marketplace, rebuilt checkout around Stripe and Apple Pay, and helped get real orders flowing after App Store launch.
iOS Marketplace · Stripe
Shipped to the App Store with real orders flowing
View case study
Kalyan Studio Apps
Restored lifetime access while modernizing StoreKit.
Migrated a multi-target audio app suite to StoreKit 2 and restored lifetime access for legacy paid users after a freemium transition.
StoreKit 2 · Audio Apps
Production StoreKit 2 migration shipped
View case study
HashtagGenerator
Turned AI generation APIs into a monetized native app.
Built a SwiftUI AI hashtag app that turns text and image generation APIs into native UX with StoreKit 2 credit packs, SwiftData history, and Keychain-backed credits.
iOS App · Creator Tools
Delivered (project handed off as Xcode zip; not published)
View case study
MountainXperience Tracking
Built safety tracking across mobile and Firebase.
Built iOS, Android, and Firebase safety tracking with background location, late-back alerts, OS map layers, and release support.
iOS + Android · Safety Tracking
V1 implemented across iOS, Android, and Firebase backend
View case study
SwiftUI · Journaling
End of Day
Built a focused SwiftUI journaling app from Figma to App Store with StoreKit 2 unlock and release support.
View project
SwiftUI · SwiftData
Stop Overthinking
Implemented a private SwiftUI journaling app with SwiftData, CloudKit sync, StoreKit 2, and App Store-ready polish.
View project
SwiftUI + Android · Weather Utility
Snowdon Summit Weather
Rebuilt a broken weather utility as native iOS and Android apps with cleaner release-ready user flows.
View projectMore selected work
A compact archive of older production builds, platform work, libraries, and experiments.
Flagship Engineering
Deeper iOS systems, SDK work, and product-engineering builds.
SlackLess
iOS App · Screen Time
Productivity app that monitors and limits distracting apps using Apple Screen Time APIs.
Swift · Screen Time API · RxSwift · Clean Architecture
Revenue Sharing iOS SDK
iOS SDK · StoreKit 2
Passive StoreKit 2 monitoring SDK for reliable revenue attribution and fraud prevention.
Swift · StoreKit 2 · Swift Package · Networking
DeviceCluster
iOS + Rust · Proximity / P2P
Privacy-centric proximity discovery and peer clustering PoC using Nearby Interaction and Rust.
SwiftUI · Nearby Interaction · MPC · Rust · H3
AirbaFresh
iOS App · Grocery Delivery
Production grocery delivery app with full catalog, checkout, and order lifecycle.
UIKit · RxSwift · Moya · Firebase
iOS Apps & Product Builds
Production apps shipped across commerce, productivity, creator tools, and wellness.
KEX
iOS App · Food Delivery
Multi-brand food delivery app rebuilt mid-project to achieve production quality and stability.
UIKit · RxSwift · Moya · MVVM-C
24Goals
iOS App · Productivity
Goal-tracking app that reached Top-8 in Productivity and Top-100 overall on launch.
UIKit · RxSwift · StoreKit · Firebase
MentalMind
iOS App · Meditation
Meditation and self-development app rebuilt from scratch and shipped under tight deadlines.
UIKit · StoreKit · AVFoundation · RxSwift
Platforms & Backend
Mobile-connected backend systems, marketplaces, and automation tools.
ISTOKHOME
Backend · Marketplace
Django backend for a two-sided marketplace for interior designers and home services.
Django · DRF · Celery · CloudPayments
UniClub
iOS App + Backend · Booking Platform
Marketplace for booking children’s classes with iOS app and Django backend.
UIKit · Alamofire · Django · Celery
Kaz Tour Telegram Bot
Bot · Lead Generation
Telegram bot that collects qualified travel leads and syncs them to Bitrix24 CRM.
Python · Django · Telegram API · SpeechKit
Legacy & Libraries
Older app work and reusable libraries that show breadth over time.
MIG
iOS App · Fintech
Redesign and rate-reservation features for a major currency exchange app in Kazakhstan.
UIKit · Alamofire · Firebase
Magazinchik
iOS App · Grocery Delivery
15-minute delivery app concept with full shopping and checkout flow.
UIKit · RxSwift · Alamofire · Yandex Maps
SwiftNetworkRouting
Library · Networking
Lightweight Swift networking library standardizing endpoints, logging, and error handling.
Swift · Alamofire · CocoaPods
AI & ML Experiments
Computer vision and NLP experiments from applied ML coursework and prototypes.
Driver Drowsiness Detection
AI/ML · Computer Vision
YOLOv5-based detection of yawning and closed eyes with a deployed video-processing web demo.
Python · PyTorch · YOLOv5 · OpenCV · Flask · Docker
Disaster Tweets
AI/ML · NLP
NLP classifier for identifying disaster-related tweets, with experiments across classical ML and neural models.
Python · NLP · TF-IDF · GRU · Django
ASL Recognition
AI/ML · Computer Vision
Object detection pipeline for ASL hand sign localization and classification, benchmarked across SSD/YOLO/Faster R-CNN.
Python · YOLOv5 · Detectron2 · TensorFlow OD · Roboflow
Contact
Need this kind of app work?
Dan Kurman
Daniyar Kurmanbayev · Toronto, Canada
Tell me what you’re shipping, stabilizing, or modernizing.
