Senior Android Engineer – Native Apps & Secure Integrations

Xebia Group; Polska; On-site; PLN 120,000 - 180,000; Full time

Job summary

Xebia Group is seeking a skilled native Android developer to join the New Ventures Core Tech area in the EU. You will integrate partner ecosystems into the Purchaser’s high-traffic mobile app and design secure identity verification and authentication flows.

Work with product and engineering teams to deliver robust, high-performance mobile experiences, using deep-linking, secure WebView integrations, and RESTful APIs. EU work permit is required.

Qualifications

• Strong professional experience in native Android development.
• Deep expertise in Kotlin and/or Java.
• Experience consuming and integrating B2B RESTful APIs in mobile apps.
• Proven experience implementing secure session management and authentication.
• Hands-on with secure WebView integrations, token handovers, and OAuth.
• Understanding of deep-linking and its Android implementation.
• Ability to design smooth, responsive, high-performance UIs.
• Strong problem-solving skills in a complex, integration-heavy environment.
• Work from EU region and a work permit are required.

Responsibilities

• Develop native Android solutions within the New Ventures Core Tech area, integrating partner ecosystems into the Purchaser’s mobile app.
• Design and implement smooth customer journeys and custom native dashboards.
• Develop secure identity verification and authentication flows.
• Build robust deep-linking mechanisms and secure WebView integrations to connect the app with external partner systems.
• Integrate remote B2B RESTful APIs and ensure reliable communication with external services.
• Implement secure session management, token handovers, and OAuth flows.
• Collaborate with product and engineering teams to deliver high-performance mobile experiences.
• Contribute to technical decisions and ensure integrations meet high security and performance standards.

Skills

Android dev

Kotlin/Java

REST APIs

OAuth flows

WebView

Deep linking

UI performance

Security

Problem solving

Job description

Xebia is a global AI-first, digital transformation, and engineering partner. With over 25 years of experience and a team of 5,000 professionals across 16 countries, we help organizations design and build scalable products, platforms, and data-driven solutions.

We specialize in Artificial Intelligence, Data and Cloud, Intelligent Automation, and Digital Products, combining deep technical expertise with a strong focus on engineering excellence and a people-first culture.

In the CEE region, we’re a team of nearly 1,000 experts delivering modern applications, data platforms, and AI solutions for clients such as Millennium, ING, Play, Edenred, Arabian Drilling, FedEx, Leroy Merlin, Truecaller, Volotea, Schmitz Cargobull, and many, many more.

You will be:

• developing native Android solutions within the New Ventures Core Tech area, integrating partner ecosystems directly into the Purchaser’s high-traffic mobile application,
• designing and implementing smooth customer journeys and custom native dashboards,
• developing secure identity verification and authentication flows,
• building robust deep-linking mechanisms and secure WebView integrations to connect the mobile application with external partner systems,
• integrating remote B2B RESTful APIs and ensuring reliable communication between the mobile application and external services,
• implementing secure session management, token handovers, and OAuth flows,
• collaborating with product and engineering teams to deliver high-performance and seamless mobile experiences,
• contributing to technical decisions and ensuring that integrations meet high standards of security, performance, and usability.

Your profile:

• strong professional experience in native Android development,
• deep expertise in Kotlin and/or Java,
• extensive experience consuming and integrating B2B RESTful APIs in mobile applications,
• proven experience implementing secure session management and authentication mechanisms,
• hands-on experience with secure WebView integrations, token handovers, and OAuth flows on mobile,
• strong understanding of deep-linking and its implementation in Android applications,
• ability to design and develop smooth, responsive, and high-performance user interfaces,
• strong problem-solving skills and ability to work effectively in a complex, integration-heavy environment,
• Work from the European Union region and a work permit are required.

Nice to have:

• familiarity with Android mobile accessibility guidelines and best practices,
• experience with mobile subscription flows,
• experience integrating native payment SDKs.

Recruitment Process:

CV review – HR call – Interview – Client Interview – Decision