iOS SDK Consultant

About the Project

We are developing a SDK, a reusable iOS framework derived from our existing production application, which is already released and actively maintained.

The current app contains:

• CoreML-based pose estimation models

• 3D reconstruction pipeline

• Biomechanics / activity analysis logic

• Real-time video processing workflows

• UI components and app-level state management

Our goal is not to rebuild the app, but to:

Refactor and extract the core AI/ML logic into a clean, modular, embeddable SDK that can be integrated into third-party iOS applications.

We could use Jitsi IOS SDK as reference below:

Jitsi is an open source meeting platform like Google Meet that we could embed as SDK in our own app.

Reference: https://jitsi.github.io/handbook/docs/dev-guide/dev-guide-ios-sdk/

The SDK will be analogous in purpose/structure to the Jitsi iOS SDK, where:

• Jitsi provides a full standalone app experience

• But also exposes an SDK version that external apps can embed

Similarly:

• We already have the standalone app

• We now want to provide an SDK version for external partners

Project Duration & Contract

Estimated Project Duration:
Approximately 6–10 weeks, depending on final scope and collaboration schedule (can be discussed also)

Contract Type:
Project-based contract with a defined scope and deliverables.

Possible Extension:
The contract may be extended for additional support, optimization, or SDK evolution depending on project needs.

Working Hours

Expected Working Commitment:
Approximately 20–40 hours per week during the active development phase.

Flexibility:

• Working hours are flexible and can be scheduled according to mutual agreement.

Candidate should be available for weekly sync meetings with the internal iOS team.

Project Duration & Contract

Estimated Project Duration:
Approximately 6–10 weeks, depending on final scope and collaboration schedule (can be discussed also)

Contract Type:
Project-based contract with a defined scope and deliverables.

Possible Extension:
The contract may be extended for additional support, optimization, or SDK evolution depending on project needs.

Working Hours

Expected Working Commitment:
Approximately 20–40 hours per week during the active development phase.

Flexibility:

• Working hours are flexible and can be scheduled according to mutual agreement.

• Candidate should be available for weekly sync meetings with the internal iOS team.

Estimated Total Effort:
Approximately 200 hours total for the project.

Objective

Engage with an experienced iOS SDK consultant to transform the existing monolithic app into:

1. A modular architecture separating:

   • Core ML inference layer

   • Processing pipelines

   • Business logic

   • UI (to remain outside SDK)
      

2. A distributable XCFramework

3. A clean, stable, versioned public API (through SDK)

4. A secure binary distribution package

5. Proper documentation and sample integration app

Scope of Work

1️Architecture & Design

• Review current app codebase and logic

• Define modular boundaries between:

  • CoreML model code

  • Preprocessing / postprocessing logic

  • Networking / authentication

  • SDK public APIs

• Decide target platforms/architectures:

  • iOS device (arm64)

  • Simulator (x86_64 / Apple Silicon)

  • Support for multiple Swift versions? (compatibility strategy)

Deliverables:
✔ Architecture diagram
✔ Public API surface design
✔ Versioning and backward compatibility strategy

2️SDK Implementation

• Create a new iOS SDK project

  • Use XCFramework format for binary distribution

  • Provide both static and dynamic framework choices if appropriate

• Maintain modular code:

  • Public APIs cleanly separated from internal logic

  • Sensitive internals hidden

• Include:

  • Embedded CoreML model(s)

  • All model preprocessing and postprocessing

  • Hooks/callbacks for host app integration

• Provide:

  • Swift Package Manager (SPM) support

  • (Optional) CocoaPods integration support

• High-Level Module Structure

  • Core      → Pure algorithms (no UIKit, no SwiftUI)

  • Models    → Public data contracts (structs, enums, errors)

  • Engine    → Orchestration + lifecycle control

  • SDK       → Public facade layer (entry point for developers)

Deliverables:
✔ Built XCFramework(s)
✔ Build scripts (e.g., Fastlane / xcodebuild / CI configs)

3️Security & IP Protection

• Discuss and advise on:

  • Code obfuscation strategy

  • Symbol stripping

  • Protecting embedded models and logic

  • Secure storage of sensitive data / credentials

• Provide:

  • Secure release packaging process

  • Recommendations for API key / token management

Deliverables:
✔ Security guidelines document

4️Documentation & Samples

• Produce clear developer docs:

  • Quick start

  • API reference

  • Integration examples

  • Troubleshooting

• Create sample host demo app:

  • Shows how to integrate SDK

  • Shows usage patterns (initialize, run inference, receive callbacks)

  • Handles error states gracefully

Deliverables:
✔ Markdown / HTML docs
✔ Sample project

5️Testing & QA

• Unit testing of core logic

• Core logic profiling using Instruments

• Integration testing of SDK within sample app

• Test compatibility with common app scenarios

• Provide test reports and results

Deliverables:
✔ Test plan
✔ Results / test artifacts

6️Collaboration & Knowledge Transfer

• Consult with internal iOS team

  • Code reviews

  • Architecture discussions

  • Workshopping integration decisions

• Provide transfer sessions and onboarding

  • Minimum 2–3 sessions via video call

Deliverables:
✔ Meeting summaries
✔ Recorded sessions (optional/if possible)

Expected Duration

• Consultation + initial design: 1–2 weeks

• Implementation + docs: 4–6 weeks (depending on scope)

• Testing + handoff: 1–2 weeks

Total approx: 6–10 weeks

Required Skills & Experience

Deliverables Checklist

✔ Architecture design package
✔ SDK (XCFramework + SPM package)
✔ Build & release scripts
✔ Technical documentation
✔ Demo integration app
✔ Test plan & results
✔ Security recommendations
✔ Handoff session with internal team

1. 年終獎金及績效獎金（依照工作績效評估）
2. 不定期員工聚餐
3. 不定期員工團體活動
4. 音樂會/電影欣賞
5. 其他法定假日（依勞基法規定）