Senior Mobile Engineer – Swift, Kotlin

🔥 0 minutes ago

🇵🇱 Poland – Remote

⏳ Contract/Temporary

🟠 Senior

🖥 Software Engineer

👻 Ghost score 18%

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Exerizon

WebsiteLinkedInAll Job Openings

11 - 50 employees

💼 Consulting

🤖 Artificial Intelligence

🤝 B2B

Consulting • Artificial Intelligence • B2B

Exerizon is a consulting firm that partners with current and future market leaders to solve strategic and technical challenges and drive growth. Its management and technology practices work with clients to define digital strategy, improve operational excellence, embrace cloud transformation, modernize legacy applications, and deliver bespoke data and AI solutions. Exerizon also emphasizes a redefined consulting model where consultants can earn equity early, and it offers impact-based remuneration that shares risk and outcomes with customers.

📋 Description

• Design and build native apps in Swift (SwiftUI, UIKit) and/or Kotlin (Jetpack Compose), including new features, legacy modernisation and justified rewrites • Own platform architecture, including modularisation, MVVM / Clean Architecture / TCA, dependency injection, offline-first and data sync strategies • Build and evolve server-driven UI (SDUI), including component schemas, client-side rendering, schema versioning, backward compatibility and graceful fallbacks • Practise AI-driven development using coding agents and copilots for implementation, refactoring, test generation and code review • Integrate backend services through REST, GraphQL and gRPC, and secure apps end to end • Set and enforce engineering standards covering code review, unit/UI/snapshot testing, CI/CD, signing and app-store release management with phased rollouts • Build observability and product quality through crash reporting, analytics, feature flags, performance and startup-time budgets • Deliver accessibility and localisation for regulated clients • Work with client product owners, designers, backend engineers and QA; estimate, plan and demo work to stakeholders • Mentor mid-level engineers, raise Exerizon’s mobile practice standards, and support proposals and pre-sales demos

🎯 Requirements

• 6+ years of native mobile development, including 3+ years in Swift (iOS) and/or Kotlin (Android); at least two apps shipped to production and maintained through multiple releases • Deep knowledge of your platform — iOS: SwiftUI and UIKit, Swift Concurrency or Combine, Xcode toolchain; Android: Jetpack Compose, Kotlin Coroutines and Flow, Android Jetpack, Gradle — with a working understanding of the other platform • Hands-on experience with mobile security in regulated environments: OAuth2 / OIDC and strong customer authentication flows, secure storage, certificate pinning, OWASP MASVS, and closing pen-test findings • Solid testing and CI/CD practice: XCTest or JUnit, UI and snapshot tests, automated pipelines, code signing, store submission and release management • Proven ability to own architecture decisions and refactor large legacy codebases safely, with measurable improvements in build time, crash rate or release cadence • Experience designing or integrating a server-driven UI framework: component schemas, a client renderer, schema versioning and A/B-tested layouts; understanding of where SDUI pays off and where it hurts (offline, performance, accessibility) • AI-driven development as part of your workflow: daily use of coding agents and copilots, understanding of their failure modes, and review of AI-generated code to the same standard as your own • Fluent API integration: REST and GraphQL, OpenAPI contracts, and collaboration with backend teams on API design • Experience delivering apps in banking, insurance, fintech or healthcare, including PII handling and regulatory constraints (PSD2 / SCA, GDPR) • Clear communication with non-engineers: explaining trade-offs to a product owner and estimating honestly • Full professional fluency in Polish and English

🏖️ Benefits

• Real ownership of the apps you build and direct contact with client product owners — no ten-layer review pyramid • Competitive compensation on B2B contract • Annual training and certification budget • Remote work model with access to a central Warsaw office • A seat at the table in shaping a young firm: our mobile practice, engineering standards, hiring and culture