Senior iOS Developer: Technical Rescue, Security Audit

Headline:

Senior iOS Developer: Technical Rescue, Security Audit & Brand Migration (9.5MB Native App)

Job Description

I am seeking a Senior Developer for a "Maintenance Rescue" mission on a high-performance ecosystem (Customer, Partner, and Admin apps).

The app is currently a lean 9.5MB build natively in Swift, but a recent audit has revealed critical technical debt and security vulnerabilities that require an immediate stabilization sprint.

The Scope of Work:

• Security & Stabilization (P0): Audit and secure Braintree API keys, fix SSL vulnerabilities, and rotate all environment variables to ensure system safety.

Logic & Math Audit:

Fix calculation errors in the payment flow to ensure transparent and accurate subtotal, tax, and tip logic across the ecosystem.

Surgical Rebranding:

Execute a global "find-and-replace" for core strings (e.g., Gas

ightarrow Service) using Regex to maintain code structure and flow.

UI Optimization:

Update splash screens and icons while maintaining the current 9.5MB performance standard—no uncompressed or bloated assets.

Requirements

• Expert in Swift (Native iOS) and Backend Security.
• Proven experience with Braintree/PayPal SDK and payment gateway encryption.
• Ability to perform surgical code updates without breaking existing CI/CD pipelines.
• High-performance communication: Must provide clear daily updates on security patches and logic fixes.

To be considered, you must start your proposal with the keyword: INTEGRITY.

Budget Note:

The $700 is a placeholder for the Phase 1 "Security & Stabilization" contract. Please provide your realistic quote based on the audit requirements described.

Contract duration of 1 to 3 months.

Mandatory skills:

Braintree, Information Security Audit, backend development, data security, app store connect, regular expressions, mobile app architecture, Swift, iOS Development, API Integration