Senior iOS Engineer (Swift)

Square One Resources Sp. z o.o.; Warszawa; Remote; PLN 180,000 - 240,000; Full time

Job summary

A leading technology firm is looking for an experienced iOS Engineer to work on a project for a German client in the energy sector. You will be responsible for fixing bugs, implementing tests, and potentially refactoring a legacy mobile app. Strong expertise in Swift and experience with GPS and Bluetooth features are required. This role is remote and offers a three-month contract with the possibility of extension.

Qualifications

• Strong expertise in iOS development with Swift.
• Proven experience in maintaining and refactoring legacy applications.
• Practical knowledge of native features such as GPS, Bluetooth, camera, etc.
• English at B2+ level.

Responsibilities

• Designing, developing, and implementing iOS applications in Swift.
• Analyzing project requirements and collaborating with the team.
• Conducting code reviews to ensure high-quality implementations.
• Optimizing existing applications for performance and security.
• Mentoring junior engineers and sharing knowledge.
• Collaborating with UI/UX teams for application consistency.

Skills

iOS development

Swift

Legacy applications maintenance

Communication skills

GPS

Bluetooth

Camera

Unit testing

Job description

We are looking for an experienced iOS Engineer to join a project for a German client in the energy sector. The role involves working with a legacy mobile application – fixing bugs, implementing tests, and potentially refactoring the app. The application uses a wide range of native features, including storage, camera, accelerometer, GPS, Bluetooth, WiFi, and cellular network.

Duration: 3 months full-time + possible extension for 3 more months (part-time)

Location: Remote

Your responsibilities

• Designing, developing, and implementing iOS applications in Swift.
• Analyzing project requirements and collaborating with the team to develop effective solutions.
• Conducting code reviews and ensuring high-quality implementations and standards compliance.
• Optimizing existing applications for performance, responsiveness, and security.
• Participating in software architecture development and selecting appropriate technologies and tools.
• Mentoring junior engineers and sharing knowledge with the team.
• Collaborating with UI/UX teams to ensure application consistency and a high-quality user interface.
• Participating in project meetings and actively contributing ideas to product development discussions.
• Writing technical documentation and keeping it current.
• Maintaining knowledge of the latest iOS trends and technologies and striving for continuous improvement.
• Testing applications using unit and integration tests to ensure stability and quality.
• Resolving issues and bugs reported by users and responding quickly to their needs.

Our requirements

• Strong expertise in iOS development with Swift.
• Proven experience in maintaining and refactoring legacy applications.
• Practical knowledge of native features such as GPS, Bluetooth, camera, etc.
• Excellent communication skills – ability to collaborate directly with the client and team members.
• English at B2+ level (international client from Germany).