Senior iOS SDK Engineer — Build Core Frameworks

H & M Hennes & Mauritz Sverige AB; Stockholms kommun; On-site; SEK 900,000 - 1,200,000; Full time

Benefits offered by this job

Staff discount card: usable on all H&M

HIP incentive program

Competitive pensions

30 days vacation

Benify discounts

Innovative environment

Global impact

Professional growth

Collaborative culture

Job summary

H&M Hennes & Mauritz Sverige AB in Stockholm, Sweden, seeks an experienced iOS SDK engineer to design, develop, and maintain robust SDKs using Swift. You will collaborate with product, security, QA, Android, backend, and developer relations to deliver reusable frameworks and clear public APIs.

You will ensure compatibility across iOS versions and devices, optimize performance, and contribute to automated testing, CI/CD pipelines, and documentation.

Qualifications

• 5+ years of professional iOS development experience.
• 2+ years building SDKs, frameworks, libraries, or shared mobile platforms.
• Expert knowledge of Swift, UIKit, SwiftUI, Foundation, and modern iOS architecture patterns.
• Strong understanding of Swift Package Manager, XCFrameworks, or similar distribution methods.
• Experience with REST APIs, networking layers, serialization, and async programming.
• Strong debugging and performance profiling skills using Xcode Instruments and related tools.
• Experience with CI/CD systems such as GitHub Actions, Jenkins, Bitrise, or CircleCI.
• Solid understanding of semantic versioning, backward compatibility, and API lifecycle management.
• Strong knowledge of secure mobile development practices.
• Excellent communication and cross‑functional collaboration skills.

Responsibilities

• Design, develop, and maintain robust, scalable iOS SDKs using Swift.
• Collaborate with product managers, designers, and developers to define requirements and deliver features.
• Build reusable frameworks, libraries, and tooling for the main product.
• Define clean, intuitive public APIs with documentation and versioning strategy.
• Ensure SDK compatibility across iOS versions, devices, and architectures.
• Optimize SDK performance, memory usage, startup time, and battery efficiency.
• Create automated tests including unit, integration, UI, and regression testing.
• Implement CI/CD pipelines for SDK packaging, releases, and QA.
• Collaborate with Product, Security, QA, Android, Backend, and Developer Relations teams.
• Maintain release notes, migration guides, sample apps, and technical documentation.
• Conduct code reviews and maintain high code quality standards.
• Stay current with iOS trends and evaluate new tools/frameworks.
• Participate in Agile/Scrum processes and estimations.
• Share insights to foster continuous improvement.

Skills

iOS development

SDKs/frameworks/libraries

Swift/UIKit/SwiftUI/Foundation

Swift Package Manager/XCFrameworks

REST APIs & networking

Performance profiling

CI/CD (GitHub Actions/Jenkins/Bitrise)

Semantic versioning & API lifecycle

Secure mobile development

Cross-functional collaboration

Tools

GitHub Actions

Jenkins

Bitrise

CircleCI

Xcode Instruments

Job description

H&M Hennes & Mauritz Sverige AB in Stockholm, Sweden, seeks an experienced iOS SDK engineer to design, develop, and maintain robust SDKs using Swift. You will collaborate with product, security, QA, Android, backend, and developer relations to deliver reusable frameworks and clear public APIs.

You will ensure compatibility across iOS versions and devices, optimize performance, and contribute to automated testing, CI/CD pipelines, and documentation.