Senior Full Stack Mobile Application Developer

Description

Summary: The Senior Full Stack Mobile Application Developer designs, develops, and deploys scalable, secure mobile applications and backend services within a FinTech/Digital Payments environment, leading end-to-end development. Highlights: 1. Lead end-to-end mobile app development in FinTech/Digital Payments 2. Design, develop, and maintain cross-platform mobile applications 3. Integrate essential third-party services and enforce secure coding **About the Role** The Senior Full Stack Mobile Application Developer is responsible for designing, developing, and deploying scalable, secure, and high\-performance mobile applications and backend services. You will lead end\-to\-end mobile app development — from UI/UX implementation and API integration to cloud deployment and production support — within a fast\-paced FinTech / Digital Payments environment. This role requires strong technical expertise in Flutter, React Native, Android/iOS development, RESTful APIs, cloud platforms, and database management, combined with a deep commitment to security, compliance, and user\-centered design. **Key Responsibilities** **Mobile Application Development** · Design, develop, and maintain cross\-platform mobile applications using Flutter or React Native · Implement responsive, intuitive, and accessible mobile UIs following modern UI/UX principles and design systems · Develop and maintain native Android (Kotlin/Java) and iOS (Swift/Objective\-C) modules as needed · Optimize mobile application performance, startup time, and memory usage across device types and OS versions **Backend \& API Development** · Build and integrate RESTful APIs and Microservices for mobile front\-end consumption · Design and manage scalable backend services using modern frameworks and cloud\-native architectures · Handle asynchronous operations, data caching, and efficient API communication patterns **Security \& Authentication** · Implement secure authentication and authorization mechanisms: o OAuth 2\.0 o JWT (JSON Web Tokens) o Single Sign\-On (SSO) o Biometric Authentication (fingerprint, face ID) · Enforce secure coding practices aligned with PCI\-DSS and banking security standards **Third\-Party Integrations** · Integrate essential third\-party services including: o Payment Gateways o SMS/OTP Services o Push Notifications (Firebase, APNs) o Identity Verification \& eKYC Solutions (Regula, Daon, Smart Engines SDKs) o Apple Pay \& Google Pay o QR Payments \& NFC Payments **Database \& Cloud Management** · Work with relational and NoSQL databases: o PostgreSQL \| MySQL \| SQL Server \| MongoDB · Deploy and manage applications on Microsoft Azure (or equivalent cloud platforms) · Implement CI/CD pipelines for automated build, test, and deployment workflows **Testing, Quality \& Deployment** · Perform unit testing, integration testing, and UI testing to ensure application reliability · Conduct performance tuning, memory profiling, and load testing · Participate in UAT/SIT environments for release management and defect resolution · Troubleshoot production issues and provide timely resolution support **Collaboration \& Leadership** · Work closely with product managers, UX/UI designers, QA teams, and business stakeholders · Participate in code reviews and enforce development standards and best practices · Mentor junior developers, guide technical decision\-making, and contribute to team growth · Prepare and maintain technical documentation, API references, and architectural guidelines · Stay current with mobile development trends, FinTech innovations, and platform updates **Required Qualifications \& Experience** **Education \& Experience** · Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field (or equivalent professional experience) · 5\+ years of hands\-on experience in full\-stack mobile application development · Proven experience building and deploying cross\-platform mobile apps using Flutter or React Native · Strong portfolio of end\-to\-end mobile applications delivered to production **Technical Skills** · Expert proficiency in Flutter/Dart and/or React Native/JavaScript/TypeScript · Strong knowledge of native Android (Kotlin/Java) and iOS (Swift/Objective\-C) development · Deep understanding of RESTful APIs, Microservices architecture, and asynchronous programming · Solid experience with secure authentication (OAuth 2\.0, JWT, SSO, Biometric) · Experience integrating payment gateways, push notifications, and eKYC SDKs · Strong database skills: PostgreSQL, MySQL, SQL Server, MongoDB · Cloud deployment experience on Microsoft Azure · Proficiency with Git, CI/CD pipelines, and modern DevOps practices · Knowledge of PCI\-DSS compliance, data encryption, and secure data storage **Professional Competencies** · Strong analytical and problem\-solving abilities with meticulous attention to detail · Excellent communication and cross\-functional teamwork skills · Proven ability to work in agile environments and manage multiple priorities · Customer\-focused mindset with commitment to delivering exceptional user experiences · Self\-motivated learner with passion for FinTech, digital payments, and banking innovation **Preferred Skills \& Attributes** · FinTech / Digital Payments / Banking domain experience — especially in payment gateways, digital wallets, and eKYC onboarding flows · Experience integrating Apple Pay, Google Pay, QR Payments, and NFC\-based payments · Hands\-on experience with Regula, Daon, or Smart Engines identity verification SDKs · Experience with PCI\-DSS compliance and financial data security standards · Background in Digital Wallets and Super App architectures · Experience in Microservices Architecture and containerization (Docker, Kubernetes) · Exposure to AI\-powered mobile applications, chatbots, and recommendation engines · Familiarity with multi\-language UI support (English/Arabic) · Experience with unit testing frameworks (JUnit, XCTest, Flutter Test) and TDD/BDD practices Pay: From QAR8,000\.00 per month Location: * Doha (Required) Work Location: In person