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 challenging projects and contribute to the growth of our company Collaborative and dynamic work environment Professional development and growth opportunities Competitive salary and benefits package Recruitment Process – AI Screening with TARA As part of our recruitment process, candidates may be invited to complete an initial AI-powered screening with TARA, the ALLPS.AI interview agent.TARA helps us make the hiring process faster, fairer, and more consistent by asking structured, role-relevant questions based on the job requirements. The interview is designed to understand your experience, skills, motivation, and suitability for the role. The AI screening interview may include: Questions about your professional background and relevant experienceRole-specific technical or functional questionsQuestions about your motivation, availability, and communication skillsThe interview can usually be completed online in 15-20 minutes at a time that is convenient for you. Your responses will be reviewed as part of the overall selection process, together with your CV, application details, and any follow-up interviews with the hiring team. Candidate Experience.: We use AI to support the recruitment process, but final hiring decisions are made by people. Human recruiters and hiring managers remain involved in reviewing candidates and making selection decisions.We are committed to a transparent, respectful, and fair candidate experience. Your data will be handled confidentially and in accordance with applicable data protection requirements. If you are a motivated and experienced Mobile Application Developer looking for a new challenge, please submit your application, including your resume and a cover letter, to our website. We look forward to hearing from you.