Senior iOS Platform Engineer: Toolchain & Release Lead

JPMorgan Chase & Co.; City of Westminster; On-site; GBP 120,000 - 150,000; Full time

Job summary

JPMorgan Chase & Co. in London is seeking a Senior iOS Engineer to design, build, and maintain the iOS SDLC toolchain, ensuring compliance and reliability. You will mentor engineers, drive technical initiatives, and collaborate across squads to improve developer experience and adopt new technologies.

You will own shared core layers of the iOS app, work with Swift, Xcode, and iOS SDK, and lead release processes while addressing security and performance concerns in a fintech environment.

Qualifications

• Significant commercial experience in native iOS mobile application development.
• Strong knowledge of Swift, Xcode, and LLVM/Clang build systems.
• Experience owning or improving mobile release processes, including signing and provisioning.

Responsibilities

• Design, build, and maintain the iOS SDLC toolchain to meet firm standards
• Write and maintain Jenkins pipelines (Groovy, Docker, Shell) for iOS and engineering tools
• Keep Xcode, Swift, iOS SDK, and supporting tools updated with stable versions
• Own and optimize a reliable, repeatable release cycle for iOS apps
• Identify and automate gaps and friction in developer experience and release processes
• Take on cross-cutting iOS work beyond single feature teams or pillars
• Define and improve iOS architecture patterns and testing strategies
• Write, maintain, and support Architectural Decision Records (ADR) for the iOS platform
• Track and adopt new iOS technologies and platform features where valuable
• Set up and maintain AI skills for safe and effective use by iOS engineers
• Lead and contribute to technical initiatives that enhance the codebase and toolset
• Own shared core layers of the iOS app, including monitoring, feature flags, and networking
• Act as senior escalation point for incidents, complex bugs, and production issues
• Provide timely guidance and support for iOS technical questions across the team
• Focus on root cause analysis and resolution
• Collaborate with Security teams to implement controls and reduce risk
• Coordinate and resolve security findings with feature teams
• Mentor and guide iOS engineers at all levels
• Review code across iOS projects, maintaining quality and fostering learning
• Share knowledge through sessions and skill-sharing within the iOS and Engineering teams

Skills

Swift

Xcode

LLVM/Clang

CI/CD pipelines

Jenkins

Groovy

Docker

Debugging

Mentoring

Communication

Tools

Jenkins

Groovy

Docker

Xcode

Job description

JPMorgan Chase & Co. in London is seeking a Senior iOS Engineer to design, build, and maintain the iOS SDLC toolchain, ensuring compliance and reliability. You will mentor engineers, drive technical initiatives, and collaborate across squads to improve developer experience and adopt new technologies.

You will own shared core layers of the iOS app, work with Swift, Xcode, and iOS SDK, and lead release processes while addressing security and performance concerns in a fintech environment.