Senior iOS Engineer

Jobtailor; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Jobtailor in Warsaw, Poland, is seeking an experienced iOS developer to own the end-to-end product lifecycle. You will collaborate with cross-functional teams across iOS, Android, frontend, backend, and QA to design and deliver core features, implement testable Swift code, and advocate for best architectural practices.

You will drive architecture improvements, contribute to SwiftUI and Combine-based solutions, and ensure robust documentation and testing in an Agile setting.

Qualifications

• 3+ years of professional iOS development experience.
• Expertise in readable, maintainable Swift code.
• Experience with high-quality, testable code.
• Experience with unit and integration testing.
• Familiarity with Git, Fastlane, and Xcode toolchain.
• Familiarity with MVVM patterns and reactive programming.
• Understanding of CI and Agile development.
• Experience collaborating with cross-functional teams.

Responsibilities

• Develop and maintain a global iOS product with cross-functional teams (iOS, Android, frontend, backend, QA).
• Lead development of high-impact core features.
• Own the full development cycle from research to release and maintenance.
• Collaborate with iOS developers to advance architecture using SwiftUI and Swift Concurrency.
• Write unit and integration tests and document features.
• Improve team processes, conventions, and architecture in an Agile environment.

Skills

iOS development

Swift programming

Unit testing

Agile methodologies

CI/CD

Tools

Git

Fastlane

Xcode CLI

Apple build systems

Job description

• Develop and maintain a global product for the iOS platform with iOS, Android, Frontend, Backend, and QA teams
• Lead development of high-impact core features
• Own the full development cycle from research and technical design through execution, release, and post-launch maintenance
• Collaborate with iOS developers across the organization to advance architecture and adopt SwiftUI and Swift Concurrency
• Write unit and integration tests and ensure features are clearly documented
• Improve team processes, development conventions, and architectural solutions in an Agile environment

Requirements

• 3+ years of professional software development experience for the iOS platform
• Expertise writing readable, maintainable, and performant protocol-oriented Swift code
• Experience writing high-quality, testable code
• Experience with unit and integration testing
• Experience with Apple build systems, release tools, and processes, including Git, Fastlane, and Xcode Command Line Tools
• Familiarity with MVVM or MVVM+C patterns
• Understanding of reactive functional programming principles, such as Combine or RxSwift
• Ability to follow Continuous Integration and Agile product development principles
• Experience collaborating with cross-functional Frontend, Desktop, Android, and Backend teams
• Understanding of client-side requirements involving end-to-end encryption and zero-knowledge policies

Core Competencies

Demonstrates expertise in developing and maintaining iOS applications, with a strong focus on writing performant Swift code and implementing testing practices. Proficient in collaborating with cross-functional teams and improving development processes within an Agile framework.

Highest-signal resume keywords

• IOS Development
• Swift Programming
• Unit Testing
• Agile Methodologies
• Continuous Integration

ATS Optimization Keywords

Hard Skills

• Swift Code
• Protocol-Oriented Programming
• Testable Code
• MVVM Pattern
• Reactive Programming
• Combine
• RxSwift

Industry Keywords

• Cross-Functional Collaboration
• End-to-End Encryption
• Zero-Knowledge Policies

Tools & Technologies

• Git
• Fastlane
• Xcode Command Line Tools
• Apple Build Systems