Lead IOS Engineer

Ruby Labs Ltd.

Job Overview

Location

European Union

Job Type

Full-time

Full Job Description

📋 Description

• As a Lead iOS Engineer, you will own the technical direction of our iOS platform, set engineering standards, and mentor a team of engineers while remaining hands-on with the codebase.
• You will drive architecture decisions, ensure scalability and performance, and partner with product and cross-functional leadership to shape the mobile roadmap.
• Define and own the technical vision, architecture, and long-term roadmap for the iOS platform.
• Lead, mentor, and grow a team of iOS engineers; set coding standards and review practices.
• Make high-impact architectural decisions and drive modularization/scalability across the codebase.
• Own CI/CD strategy, release management, and deployment reliability.
• Partner with product and design leadership to translate business goals into technical execution.
• Establish observability, performance budgets, and quality gates.
• Remain hands-on: contribute to critical features and complex problem-solving.

🎯 Requirements

• 8+ years of iOS development experience, including 2+ years in a lead or tech-lead capacity.
• Proven track record shipping and scaling B2C subscription-based apps at significant user volume.
• Deep expertise in Swift, Swift Concurrency, and advanced language features; ability to set idiomatic standards across a team.
• Mastery of StoreKit 2, subscription monetization architecture, entitlement/receipt validation at scale, paywall experimentation, and pricing/offer strategy.
• Strong architectural leadership: large-scale modular architectures, dependency management (SPM), design systems, and cross-team API contracts.
• Experience owning CI/CD at scale (Xcode Cloud, Fastlane, GitHub Actions/Bitrise), automated release trains, phased rollouts, and code-signing automation.
• Deep performance engineering: app startup, memory optimization, rendering pipeline, and Instruments-driven diagnosis.
• Comprehensive testing strategy ownership: unit, UI, snapshot, and contract testing with meaningful coverage goals.
• Experience integrating AI-driven product features and championing AI-assisted development practices across a team.
• Strong technical leadership, mentorship, stakeholder communication, and cross-functional collaboration skills.

🏖️ Benefits

• Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
• Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
• Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
• Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
• Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere.

Skills & Technologies

Ruby

Swift

GitHub

iOS

Mobile

Senior

Remote

Degree Required

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Ruby Labs Ltd.

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About Ruby Labs Ltd.

Ruby Labs Ltd. is a London-based product studio that builds and scales consumer subscription mobile and web applications. The company focuses on health, wellness, and productivity verticals, developing apps such as Hint, Able, and the award-winning fitness platform FitCoach. Using data-driven growth and proprietary technology, Ruby Labs rapidly prototypes, launches, and iterates products to serve millions of global users. The team combines engineering, product design, and performance marketing expertise to create sustainable digital businesses. Founded in 2018, Ruby Labs operates a portfolio of self-funded apps, emphasizing user privacy, scientific validation, and long-term customer value.

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