Senior Mobile Engineering

Job Description This is a remote position. Location: Remote Engagement Type: Project-based Assignment; B2B Contract Duration: 6 months with possible extension Timezone: CET ± 3 hours Be part of our Global Engineering Network! Our client is seeking an experienced Mobile Engineer to support the development of innovative mobility and smart services applications. The consultant will contribute to the design, development, and optimization of modern mobile applications that integrate real-time data, intelligent services, and user-centric experiences across iOS and Android platforms. Key Responsibilities Develop and maintain mobile applications with real-time voice/video features using WebRTC. Integrate native call frameworks (CallKit for iOS, ConnectionService for Android) for seamless VoIP experiences. Implement VoIP push notifications and background call handling. Collaborate with backend engineers on media server/TURN integration and session orchestration. Optimize application performance and ensure smooth experience across devices. Participate in code reviews and maintain high development standards. ​ Troubleshoot and resolve application issues, bugs, and performance bottlenecks. Requirements Ideal Profile 5+ years of mobile development (Flutter or native), with 2+ years in real-time voice/video applications. Strong understanding of mobile application architecture and design patterns (MVP, MVVM, BLoC). Hands-on experience with WebRTC client implementation. Proficiency with CallKit (iOS) and ConnectionService (Android). Experience with VoIP push notifications and real-time session management. Familiarity with RESTful APIs and asynchronous data handling. Knowledge of mobile UI/UX best practices and responsive design principles. Familiarity with Git and mobile CI/CD pipelines. Strong analytical, troubleshooting, and problem-solving skills. Why Partner with Us? · Clear scope with no ambiguity over deliverables. · Opportunity for repeat engagements based on performance. Selection Process 1. Proposal Submission o Submit your professional profile/CV by applying for the role. 2. Business Alignment Call o 30-minute virtual discussion with a Human Capital Consultant to review scope and expectations. 3. Verification o Opportunity to complete Castille Vetting (background and compliance checks). 4. Client Skills Review o Direct interview with the end client to discuss project specifics. o Project-specific technical assessment (if required). Ongoing Business Support · Access to CX guidance and market insights through our professional network.