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June 26, 2026
iOS Developer, Mobile Ticketing Platform
Senior • Remote
12,000 - 16,500 PLN
Wroclaw, Poland
Client
Our client is a regional leader in the transportation industry, with annual revenue exceeding €100 million, currently launching a new international ticket sales platform.
Project overview
The client engages users through a mobile app, responsive web application, and call center. The system is complex and must comply with numerous regulations. The system is built on a microservice architecture with continuous integration. Hundreds of components run independently on AWS, increasing modularity and optimizing service usage.
Team
Multiple independent teams contribute to different parts of the system. Specialists are embedded across these teams. The mobile team is focused on shaping the future of the client’s mobile app—enhancing performance and evolving its functionality.
Position overview
The role supports the modernization and development of the IT system for an independent online railway ticket retailer. You will enhance digital products through data-driven experimentation and analytics. Responsibilities include running large-scale A/B and multivariate tests using tools like Statsig, applying advanced statistical methods such as CUPED and Bayesian Autotune, automating traffic allocation, managing feature flagging with gradual rollouts and kill switches, and linking feature flags directly to product metrics.
Technology stack
- iOS: Swift
- UI: SwiftUI, UIKit
- Concurrency: GCD, Swift Concurrency
- Persistence: CoreData
- Tooling: SPM, TestFlight, Figma
- Testing: Unit Testing, UI Testing, A/B Testing
Responsibilities
- Refactor and expand the ticket-selling system
- Develop, enhance, and maintain high-quality, scalable code
- Collaborate with cross-functional teams to implement new features and support experimentation initiatives
Requirements
- 6+ years of iOS development experience using Swift
- Experience in experimentation and R&D
- Hands-on experience with Statsig or similar platforms
- Strong Clean Code and OOP skills
- Knowledge of SwiftUI and UIKit
- Experience with unit testing and working without dedicated QA engineers
- Understanding of SOLID principles
- Familiarity with Agile development methodology
- Good spoken English
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