Advanced Swift/iOS Developers - Quality Assurance/Code Review

About OpenTrain

OpenTrain is a central job board for AI-training and data-labeling work, aggregating openings from many companies and platforms so contributors can find relevant projects in one place. Creating an OpenTrain account is free and applying typically takes only a few minutes.

We connect skilled contributors with contract roles that support the human work behind modern AI — if you want flexible, remote work that directly shapes models, OpenTrain lists those opportunities.

About AI Training Work

AI training (also called data labeling or human feedback) is the human work that helps models learn: people annotate data, review outputs, and give targeted feedback so systems become accurate, safe, and useful.

This project focuses on applying software engineering QA to AI training: reviewing code responses generated for prompts, assessing correctness and prompt adherence, and providing actionable feedback that improves model training.

The Role

We are hiring experienced Swift/iOS developers to work as QA/code reviewers on an ongoing AI training project. You will evaluate code generated by freelance AI trainers for prompt compliance, correctness, style, and functionality.

This is a remote, contract, part-time role expected to run 3–6 months. The project typically requires 30–40 hours per week of effort; the listing also specifies a minimum availability of 20+ hours/week. Candidates must be available to work independently and deliver high-quality reviews.

• Employment type: Contractor, Part-time
• Typical weekly hours: project demands 30–40 hrs/week; minimum commitment 20+ hrs/week
• Duration: approximately 3–6 months
• Pay: $14 USD per hour

What You’ll Do

Perform thorough code reviews of Swift/iOS submissions written in response to prompts, ensuring they meet the requested requirements and function correctly.

Provide clear, actionable feedback to freelance trainers and maintainers to improve code quality and training outcomes.

• Assess prompt adherence and whether the code implements the requested functionality
• Validate technical correctness, performance considerations, and iOS best practices
• Identify bugs, security issues, API misuse, and edge cases
• Suggest improvements, refactors, and clearer implementations when needed
• Document review findings and communicate feedback concisely in English

Requirements

Candidates must have extensive real-world Swift/iOS development experience. A minimum of five years of Swift experience is required to be considered for this role.

You must be able to work independently, pay close attention to detail, and communicate technical feedback in English at a professional level.

• Minimum 5 years of Swift/iOS development experience (this is required)
• Proven ability to analyze, optimize, and review code thoroughly
• Familiarity with software development best practices and iOS platform guidelines
• Knowledge of AI model training concepts and QA for data-labeling workflows is a plus
• Experience with platforms such as Remotasks, Scale AI, Appen, or similar is a plus
• Strong problem-solving skills and ability to resolve complex technical issues
• Independence: able to produce high-quality work with minimal supervision
• Adaptability to new tools and project needs
• Please state your English proficiency level (we require B2 minimum). What is your level?

Who Should Apply

Experienced Swift/iOS engineers who enjoy code review, quality assurance, and improving developer-produced solutions should apply. This role suits professionals who can provide precise, constructive feedback and who want to contribute to AI model training.

This position is open worldwide and is fully remote; applicants should ensure they can meet the weekly time commitment and be available for the expected project duration.

• You have 5+ years writing production Swift for iOS apps
• You enjoy reviewing others' code and mentoring via written feedback
• You can commit to the weekly hours required and the 3–6 month timeframe
• You are fluent enough in English to deliver technical feedback (B2+ required)

How It Works / How to Apply

Create or sign in to your free OpenTrain account, complete your profile, and submit your application. Provide a brief summary of your Swift experience, availability, and examples of code review or iOS work if available.

In your application, confirm your weekly availability and state your English proficiency level (we require B2 minimum). Include any past experience doing QA/QC for AI data platforms if applicable.

• Pay rate: $14 USD per hour (contract)
• Include: years of Swift experience, typical weekly availability, and English level
• Attach or link to samples of iOS/Swift work or prior code reviews if available