AI App Developer

At Telefónica Tech (part of the Telefónica Group) we believe in building a better world through secure digital enablement, focusing on empowering organisations through every stage of their digital journey, and solving their most complex business challenges with our comprehensive suite of technology solutions across Data & AI, Cyber Security, Cloud, Business Applications, and Modern Workplace.

Telefónica Tech, Business Applications is proud to be a member of the Microsoft Inner Circle placing the organisation in the top 1% of partners across the globe. As a Microsoft partner, we have many years of experience implementing and supporting several Microsoft solutions, working across Customer Service, ERP, CRM, and productivity tools to transform businesses.

Our people, with deep-rooted expertise and specialist knowledge, are the driving force behind our end-to-end solutions, which are also backed by our enduring global legacy and advanced capabilities. This combination puts us in a unique position to meet the evolving needs of our customers and guide them confidently through their digital transformation, as a trusted partner.

With expertise across four practices, Financial Services, Retail and Manufacturing, Public Sector, and Professional Services, Telefónica Tech, Business Applications is at the forefront of driving impactful change.

ROLE: This primary responsibility of the AI Applications Developer role is to make AI solutions available and appealing to business users. For this, the role requires a combination of technical expertise in modern application development, cloud-based AI services, and a focus on delivering business value. The role ultimately reports to the Principal AI Consultant(s) who oversee AI application presales, client delivery and internal enablement.

RESPONSIBILITIES:

• Delivery of projects involving Web Applications and AI for external clients
• Development of template Web Applications, prototypes and demos for use during client presentations
• Designing intuitive, contemporary, appealing user interfaces
• Maintaining and periodically updating applications in line with latest technologies, frameworks and approaches
• Satisfying the expectations and requirements of customers, both internal and external.
• Supporting others in their development
• Contributing to the internal and external community
• Collaborating with cross-functional teams to define and implement innovative solutions for the project direction.
• Conducting code reviews and ensuring adherence to best practices and standards.
• Troubleshooting and debugging applications to optimise performance.
• Supporting sales and presales to run client-facing demonstrations

Nice to have:

• Developing user-facing chatbots using LLMs (incl. Azure OpenAI)
• Using LangChain / LangGraph or similar for LLM orchestration
• Developing multi-agent processes with tool calling and routing
• Familiarity with AI coding agents such (Claude Code, Github Copilot)
• Understanding of core concepts of data science and machine learning
• Experience optimising apps for enterprise scale, incl. load balancing
• Experience developing Apps, AI and Data Pipelines within Databricks
• Developing custom data visualisations using D3.js or similar
• Familiarity with GraphQL for API development
• Experience with serverless architecture and functions
• Experience with responsive design and cross-browser compatibility
• Experience of delivering technical demos and presenting technical concepts to non-technical audiences
• Knowledge of web security standards and practices

EXPERIENCE & SKILLS:

• Front-end development (React.js, HTML, CSS)
• Rest API development and integration (Fast API, Flask / Django)
• Expertise in back-end development (Python)
• Development of MCP services and tools
• Experience using and integrating cloud AI services (Azure AI Search, Microsoft Foundry)
• SQL databases, structures, querying (Azure SQL Server)
• NoSQL databases, structures, querying (e.g. MongoDB)
• Version control systems and processes (Git, Azure DevOps)
• Containerisation of web applications (Docker)
• Deployment of applications to cloud infrastructure (Azure App Service)
• Implementing security measures (e.g. data encryption) and private networking on cloud
• infrastructure to productionise apps to enterprise scale
• CI/CD pipelines for automated testing and deployment (DevOps Pipelines)
• App authentication approaches (e.g. MS Entra)
• Ability to work independently with minimal day-to-day supervision
• Ability to identify, scope and propose opportunities for solution improvement using learnings
• across projects.
• Ability to generate multiple solutions based on a high-level problem statement
• Ability to communicate and collaborate effectively

Ready to Make an Impact?

• Join us in shaping the future of digital transformation at Telefónica Tech UK&I. Be part of a team that values your expertise, supports your growth, and fosters a positive work environment. Apply now to embark on a rewarding journey!
• We encourage applications from a wide range of individuals, irrespective of: age, disability, gender, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or beliefs and sexual orientation.
• We look forward to hearing from you!

We don’t believe hiring is a tick box exercise, so if you feel that you don’t match the job description 100%, but would still be a great fit for role, please get in touch.

At Telefónica Tech, we believe inclusion is the bridge that empowers everyone to be their authentic selves. We celebrate and respect our differences because diversity drives innovation and makes us stronger.

Be yourself with us, and feel that you belong.

We welcome applicants from all backgrounds and identities regardless of age, disability, gender reassignment, marital or civil partnership status, pregnancy or maternity, race, religion or belief, sex, and sexual orientation.

We are also committed to equity, accessible hiring practices, and creating an inclusive culture through many means including TogetHer (Women's network) and our Employee Resource Groups which include Diversity and Inclusion, Telefónica Tech Pride, Neurodiversity, ELEVATE (African and Caribbean heritage network), and Sustainability.

We don’t believe hiring is a tick box exercise, so if you feel that you don’t match the job description 100%, but would still be a great fit for role, please get in touch.