Mobile Application Developer (Cross-Platform Mobile Engineer)

Location: Basel, Switzerland Contract Duration: 3 years, with possible extension Experience Required: 3+ years. Industry Experience: Utilities & Energy ( Energie & Wasserversorgung) or Telecommunications or Banking & Financial Services or Information Technology & Services Role Overview

We are looking for an experienced Mobile Application Developer to support a long-term enterprise project in Basel. This is a 3-year contract role with the possibility of extension. The ideal candidate will have strong hands-on experience in designing, developing, and maintaining secure, scalable, and high-performance Mobile applications. The role requires solid expertise across the following technologies.

• Core Mobile Frameworks: React Native and hybrid native mobile integrations, including the ability to connect cross-platform mobile interfaces with native iOS and Android components where required.
• Data Formatting & Transport: RESTful APIs, SOAP/XML protocols, JSON data packets and XML structural mapping for secure and reliable communication between mobile applications and backend services.

Strategic Scope: Commands the technical lifecycle of mission-critical mobile software systems, deploying responsive client utilities optimised for field-force operations, real-time tracking, and asset management on portable enterprise-managed endpoints. Core Responsibilities

• Mobile Application Development: Develop, implement and maintain mobile applications, components, modules and interfaces based on business and operational requirements.
• API & Web-Service Integration: Connect mobile applications to backend web services using SOAP/REST interfaces and common web technologies such as HTTP(S), HTML5, XML and JSON.
• Cross-Platform Compatibility: Ensure mobile applications run reliably across different mobile device platforms, including iOS and Android.
• Monitoring & Error Analysis: Implement or connect monitoring solutions for software errors, input errors, performance and access patterns in mobile applications.
• Secure Authentication Integration: Integrate mobile applications with standard authentication and authorisation protocols such as OAuth2, OpenID Connect and SAML.
• Testing & Documentation: Support integration testing, technical documentation, production defect analysis, change requests and lifecycle improvements.

Required Skills & Experience

• Minimum of 3 to 5+ years of demonstrable enterprise mobile application development experience, preferably within multi-tier enterprise application environments.
• Strong hands-on experience with React Native for building scalable, maintainable and high-performance cross-platform mobile applications.
• Experience with hybrid native integrations, including the ability to connect React Native applications with native iOS and Android components where required.
• Practical experience integrating mobile applications with backend services using RESTful APIs, SOAP/XML protocols, JSON data packets and XML structural mapping.
• Good working knowledge of modern web technologies, including HTML5, CSS 3.0, TypeScript and JavaScript.
• Experience implementing secure authentication and authorisation flows using OAuth2, OpenID Connect and SAML.
• Good understanding of mobile application performance, offline behaviour, API error handling, device compatibility and user experience across iOS and Android platforms.
• Ability to work independently as well as part of a distributed project team.
• Languages : Flawless bilingual/native-level business German communications proficiency (C1/C2 level written and spoken) is required. The candidate must present seamlessly in German during the technical panel interview (Anbieterfachgespräch).
• Swiss Compliance : Must hold EU/EFTA nationality or possess an active, valid Swiss permanent residency/work card (C Permit or unrestricted B/G Permit).
• What We Offer:**
• Opportunity to work on chall