Senior iOS Engineer – Live Auctions & Real-Time Commerce

Fanatics; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Fanatics Collectibles seeks an experienced iOS engineer to join the Instant Rips team. You’ll build live-break experiences on Fanatics Live, delivering auctions, chat, and marketplace features with a modern SwiftUI/TCA stack.

The role emphasizes end-to-end ownership, robust testing, and collaboration on architectural decisions. Expect on-site work in London and collaboration with AI-assisted tooling to improve outcomes.

Qualifications

• 5+ years building consumer-facing iOS applications at scale.
• Experience with AI-assisted development tooling and LLM optimization loops.
• Proficiency in Swift Concurrency and SwiftUI.
• Knowledge of The Composable Architecture (TCA).
• Experience with Tuist or XcodeGen; CI/CD pipelines.
• Static analysis (SwiftLint/Periphery) quality gates.
• Experience with livestreaming or high-throughput workloads.
• Exposure to marketplace or ecommerce iOS apps.
• Passion for sports cards, collectibles, or live commerce.

Responsibilities

• Design and ship production iOS features across the live-break experience: auctions, stream viewing, chat, marketplace, and collector tools.
• Own features end-to-end — API contracts, TCA reducers, SwiftUI views, testing, and release.
• Write genuine test coverage: unit tests with mock dependencies, TCA.
• TestStore assertions, async test patterns — not coverage theater.
• Review pull requests with judgment: surface real defects, prioritize what matters, coach on what to let go.
• Contribute to architectural decisions: modularization strategy, effect management, failure handling.
• Mentor engineers earlier in their career and raise the quality bar across the team.

Skills

iOS apps

Swift Concurrency

SwiftUI

TCA

CI/CD

Static analysis

TestStore

Livestreaming

WebSocket

E-commerce apps

Sports collectibles

Tools

Tuist

XcodeGen

Job description

Fanatics Collectibles seeks an experienced iOS engineer to join the Instant Rips team. You’ll build live-break experiences on Fanatics Live, delivering auctions, chat, and marketplace features with a modern SwiftUI/TCA stack.

The role emphasizes end-to-end ownership, robust testing, and collaboration on architectural decisions. Expect on-site work in London and collaboration with AI-assisted tooling to improve outcomes.