Fullstack Engineer - React Node/Python

Company Description Talan - Positive Innovation Talan is an international consulting group specializing in innovation and business transformation through technology. With over 7200 consultants in 21 countries and a turnover of 850M we are committed to delivering impactful future-ready solutions. Talan at a Glance Headquartered in Paris and operating globally Talan combines technology innovation and empowerment to deliver measurable results for our clients. Over the past 22 years weve built a strong presence in the IT and consulting landscape and were on track to reach 1 billion in revenue this year. Our Core Areas of Expertise - Data Technologies We design and implement large-scale end-to-end architecture and data solutions including data integration data science visualization Big Data AI and Generative AI. - Cloud Application Services We integrate leading platforms such as SAP Salesforce Oracle Microsoft AWS and IBM Maximo helping clients transition to the cloud and improve operational efficiency. - Management Innovation Consulting We lead business and digital transformation initiatives through project and change management best practices (PM PMO Agile Scrum Product Ownership) and support domains such as Supply Chain Cybersecurity and ESG/Low-Carbon strategies. We work with major global clients across diverse sectors including Transport Logistics Financial Services Energy Utilities Retail and Media Telecommunications. Job Description Contract Type Temporary / Contract (4 months) We are looking for a Fullstack Developer with at least 3 years of experience in mobile application development using Progressive Web Apps (PWA) to participate in the end-to-end delivery of a React-based mobile project. Please note this is a 4-month temporary contract. The selected candidate will work on a solution with a strong focus on performance user experience offline functionality and efficient data synchronization. Responsibilities - Analyze design and develop the project end-to-end. - Develop a mobile-first PWA using React and TypeScript. - Design and develop APIs connected to PostgreSQL. - Implement processes for efficient image management and storage. - Implement client-server synchronization processes and offline functionality. - Analyze and optimize application performance and architecture. - Define mobile-oriented UI/UX solutions. - Integrate authentication using OAuth 2.0 with Microsoft. - Handle the deployment of the solution. Qualifications - 3+ years of experience in mobile-first PWA development with React and TypeScript. - Experience developing APIs with Python/FastAPI and/or Node.js. - Experience working with PostgreSQL. - Experience with offline-first applications or limited connectivity environments. - Experience with caching strategies and offline functionality in PWAs. - Hands-on experience with Service Workers and IndexedDB. - Experience in image management and optimization for web/mobile applications. - Experience in client-server synchronization and offline data management. - Experience with OAuth 2.0 and/or Microsoft Entra ID (Azure AD). - Experience with deployments on AWS and/or Azure. - Experience in web/mobile performance optimization. - Strong understanding of mobile-oriented UI/UX. - Spanish at fluent or native level is Mandatory - Ability to work autonomously and contribute to architectural decisions. Nice to Have / Optional - Experience with offline-first architectures and data synchronization conflict resolution. - Experience with Microsoft Graph API particularly integration with Microsoft Teams and email services for sending notifications. Additional Information - B2B or freelancer contract. - Remote position working in the Spain time zone. - Be part of a multicultural team working on international projects. - Temporary / Contract (4 months) If you are passionate about data development tech we want to meet you - Talan Spains commitment to non-discrimination based on gender race ideology or any other reason in accordance with the companys Equality Plan and the current regulations on gender equality between women and men (Royal Decree-Law 6/2019).