Mobile Developer - iOS & Android / LLMs 9-Month Contract

Out client is building mobile apps that bring advanced AI directly to users’ fingertips, and they're looking for a number of Mobile Developers with iOS and Android experience to help make it happen. Our client breakthrough tools are transforming how large language models run, enabling apps that are smarter, greener, and more efficient.

Backend backed by global investors and major EU support, our clients technology is already reshaping how AI is deployed worldwide by cutting costs, slashing model sizes, and making systems faster, greener, and more accessible.

These are fixed term 9 month contracts, working on a hybrid model in Barcelona.

You will receive a base salary, plus bonus and retention bonus.

In this role you’ll:

• Design and build native iOS and Android apps with AI-powered features
• Integrate cutting-edge LLM and NLP capabilities into real-time user experiences
• Collaborate with designers, product managers, and AI engineers
• Deliver secure, high-performance apps to millions of users

What you’ll need:

• Experience developing and shipping apps on both iOS (Swift/Obj-C) and Android (Kotlin/Java)
• Familiarity with REST APIs, cloud services, and app store deployment
• An eye for mobile UI/UX best practices
• BSc in Computer Science, Software Engineering, or related technical field.
• 2+ years’ experience developing and releasing iOS and Android mobile applications, including API/cloud integrations.
• Proficiency in Swift and Objective-C for iOS; Kotlin and Java for Android development.
• Familiarity with mobile UI/UX design principles, version control (Git), and use of Android Studio/Xcode.
• Experience integrating mobile apps with RESTful APIs and cloud services.

Desired skills:

• Experience building mobile apps with LLM, NLP, or generative AI features.
• Familiarity with cloud ML services (AWS, Azure, GCP, OpenAI)
• Prior experience publishing and maintaining apps on both App Store and Google Play.
• Interest in mobile data security and user privacy protections.

This is a unique opportunity to combine mobile development expertise with frontier AI technology, shaping products that will change the way people interact with intelligent systems.

In accordance with local employment laws, applicants must have current, valid authorisation to work in Spain at the time of application. We are unable to sponsor employment visas for this role. Applications from individuals without existing work authorisation for Spain cannot be considered.

If this sounds interesting and you'd like to learn more, click the link below to apply or email me with a copy of your CV on [email protected]

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