Senior iOS Engineer · Swift Specialist · iOS Architect
I build scalable, reliable and maintainable native iOS applications. With 7+ years of experience, my work spans modern Swift, legacy Objective-C, modular SDKs and enterprise mobile architecture.
I care about the engineering beneath the interface: predictable concurrency, secure authentication, resilient offline experiences, measurable performance and APIs that remain easy to evolve.
| Modular systems, Clean Architecture, VIP/MVVM, dependency injection and maintainable boundaries. | Swift 6, structured concurrency, strict concurrency adoption and safe asynchronous APIs. |
| Reusable frameworks, Swift Package Manager, public API design and integration workflows. | OAuth 2.0 / PKCE, JWT lifecycle, Keychain, certificate pinning and secure session handling. |
| Local persistence, synchronization, resilient workflows and network-aware experiences. | Instruments, memory management, XCTest, accessibility and launch/rendering optimization. |
Apple platforms & languages
Architecture & engineering
Networking, data & delivery
A selection of public projects that demonstrate my approach to native iOS development, architecture and problem-solving.
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A Swift sample app that loads user directory data from a REST API and presents list/detail navigation.
Stack · Swift · Clean VIP · Alamofire · SDWebImage · XCTest Protocol-driven presentation logic, image caching and network reachability handling. |
A reusable example of integrating Google Places autocomplete into a native iOS search flow.
Stack · Swift · UIKit · Google Places SDK · Core Location Decoupled search UI, input throttling and delegate-based communication. |
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An Objective-C grocery application demonstrating UIKit and legacy iOS code maintenance.
Stack · Objective-C · UIKit · Foundation · Core Graphics Legacy code stewardship and multi-contributor project experience. |
A native iOS example focused on scroll views, layout behavior and dynamic content sizing.
Stack · Swift · UIKit · UIScrollView · Auto Layout Explores layout calculations and smooth scrolling for changing content. |
Commercial client work is covered by confidentiality agreements. The following summarizes the engineering areas I have worked across without disclosing proprietary implementation details.
- Enterprise applications — Multi-module native iOS applications and maintainable feature architecture.
- SDK & component development — Reusable Swift frameworks for authentication, networking and shared UI capabilities.
- Identity & security — OAuth 2.0 PKCE, JWT token lifecycle, Keychain storage and certificate pinning.
- Offline storage & synchronization — Local persistence with Core Data / SQLite and background synchronization workflows.
- Real-time communication — WebSocket-based messaging and live status updates.
- Performance & reliability — Instruments profiling, memory ownership, retain-cycle investigation and launch/rendering improvements.
- Accessibility — VoiceOver, Dynamic Type, accessible touch targets and inclusive interaction patterns.
| Period | Engineering focus |
|---|---|
| 2015–2019 | iOS foundations · Objective-C · Swift adoption · UIKit · Core Graphics |
| 2019–2023 | Native iOS development · Clean Architecture · Enterprise apps · Authentication SDKs |
| 2023–2026 | Modern Swift · SwiftUI · Swift 6 concurrency · SPM modularization |
| 2026+ | Advanced systems · On-device AI · Spatial computing · Framework design |
- Swift 6 and concurrency — Safer asynchronous code, strict concurrency and clear actor boundaries.
- AI on Apple platforms — Exploring on-device intelligence and practical AI-assisted workflows in native apps.
- Developer experience — Build tooling, automation, static checks and documentation that stays aligned with code.
- Framework design — Small public APIs, explicit dependencies and reusable components.
- Performance — Memory ownership, startup time, rendering and efficient background work.
Build for the engineer who has to extend the codebase next, not just for the user who opens the app today.
- Small surface area — Keep public APIs focused and module responsibilities clear.
- Explicit dependencies — Prefer clear contracts and dependency injection over hidden side effects.
- Performance is a feature — Measure before optimizing; protect responsiveness and resource usage.
- Accessibility by design — Treat inclusive interaction as a core requirement, not a finishing task.
- Testable boundaries — Keep business rules independently testable and easy to reason about.
- Evolution over cleverness — Choose understandable solutions that can adapt as requirements change.
The examples below describe recurring engineering problem spaces from professional work. Client and product details are intentionally omitted where work is confidential.
| Area | Engineering problems I work through |
|---|---|
| Modular iOS SDKs | Designing Swift package boundaries, stable public APIs, app/extension integration, environment configuration and secure SDK setup. |
| Swift 6 modernization | Adopting strict concurrency, clarifying actor isolation, handling callback boundaries and making asynchronous APIs safer without hiding problems behind unsafe escape hatches. |
| Offline-first applications | Keeping local data workflows reliable, coordinating synchronization, protecting database consistency and preserving existing business rules. |
| Local-first AI workflows | Translating natural-language requests into structured intent, then validating and executing operations through existing local domain logic and database services. |
| Real-time messaging | Building integration layers around messaging SDKs, session restoration, lifecycle handling and notification delivery. |
- Understand the current behavior — map the user flow, existing business rules, data ownership and integration points.
- Identify constraints and risks — compatibility, concurrency, security, performance, migration cost and failure paths.
- Design the smallest maintainable change — clear boundaries, explicit dependencies and minimal public API surface.
- Validate the outcome — tests, static analysis, profiling, documentation and regression checks.
- Swift 6 migration and practical concurrency debugging
- UIKit / SwiftUI architecture and modularization
- Building and distributing reusable iOS SDKs
- Offline-first data flows and synchronization
- Secure authentication, Keychain and certificate pinning
- Integrating AI while keeping business logic and local data authoritative
- 🗣 Commented on #1 in sidshah13/sidshah13
I'm always interested in thoughtful conversations about Swift, iOS architecture, developer tooling, performance and practical AI integration.
Designed with clarity · Built with precision · Always evolving