Senior iOS Developer

About Archysoft

Archysoft is a software development company with over 10 years of experience delivering solutions to clients across the United States and Western Europe.

We are looking for a Senior iOS Developer to maintain and further develop a mature native iOS application for managing Bluetooth-enabled devices. The product also includes encrypted chats, audio and video calls, media functionality, and a companion Apple Watch application.

The project has been actively developed since 2018 and includes a large Swift codebase, multiple application targets, regional builds, and integrations with physical devices.

In this role, you will:

• Maintain and further develop the native iOS application;
• Investigate production issues and crashes;
• Implement new features and support new iOS versions and devices;
• Work with Bluetooth Low Energy, custom device protocols, background connections, and OTA firmware updates;
• Maintain WebRTC calls, CallKit integration, encrypted chats, and secure local storage;
• Support the Apple Watch application and background audio functionality;
• Manage TestFlight and App Store releases;
• Maintain multiple application targets and regional configurations;
• Update dependencies and gradually improve legacy code;

• Participate in code reviews and collaborate with development and QA teams.

   

Required experience and skills

• 5+ years of commercial iOS development experience;
• Expert knowledge of Swift;
• Strong commercial experience with UIKit, Storyboards, XIB, Auto Layout, and custom views;
• Strong experience with RxSwift, RxCocoa, and reactive programming;
• Practical experience with CoreBluetooth and BLE, including GATT, background modes, and connection stability;
• Ability to read and modify Objective-C code;
• Experience with local databases, Keychain, and sensitive or encrypted data;
• Strong knowledge of Swift Package Manager;
• Experience maintaining large multi-target Xcode projects;
• Experience with fastlane, TestFlight, and App Store releases;
• Strong production debugging skills;
• Ability to work independently;

• English level B2 or higher.

   

As a plus

• Experience with RxBluetoothKit and OTA/DFU firmware updates;
• WebRTC and CallKit experience;
• Apple Watch or watchOS development experience;
• Experience with end-to-end encryption technologies such as Olm or Matrix;
• Experience with Realm and encrypted local storage;
• GitLab CI, fastlane Match, and self-hosted macOS runners;

• Experience supporting applications for the Chinese market.

   

Technology stack

Swift, Objective-C, UIKit, MVVM, RxSwift, RxCocoa, Moya, Alamofire, CoreBluetooth, RxBluetoothKit, Realm, WebRTC, CallKit, Firebase, SPM, GitLab CI, fastlane, watchOS.

What we offer

• Fully remote, full-time cooperation;
• A long-term product with an established user base;
• Work with complex native mobile functionality and physical devices;
• Professional development plan and regular feedback;
• Compensation for approved courses and certifications;
• 20 paid working days per year for vacation and sick leave;

• Salary reviews based on performance and professional growth.

   

Interview process

• Introductory interview with a recruiter;
• Technical interview;
• Final interview with the client or project representative.