Senior Application Engineer

TelefonicaTech

London, England, United Kingdom Hybrid permanent

Posted: January 30, 2026

Required Skills

Job Description

Telefónica Tech (part of the Telefónica Group) is a leading NextGen Tech solutions provider with a highly diversified team of over 6,000 exceptionally skilled employees and +60 nationalities.

We serve more than 5.5m customers every day in over 175 countries, with a global ecosystem of market-leading partners. Global strategic hubs: Spain, Brazil, the UK, Germany.

The Telefónica Tech UK&I hub has an end- to-end portfolio of market leading services and develops integrated technology solutions to accelerate digital transformation through: Cloud, Data & AI, Enterprise Applications, Workplace Services and Cyber Security & Networking.

Values: Open, Bold, Trusted

Trusted Partners:

• Microsoft: Top 3 Service Providers, Azure Expert Status, Fastrack & Inner Circle Partner
• HPE: Platinum Partner – FY23 UK&I Solution Provider of the Year
• Palo Alto & Crowdstrike: part of our NextDefense Cyber Security Portfolio
• Fortinet: Elite VIP Program – one of only 2 in the UK
• AWS: Advanced Solution & Managed Service Provider Program

Senior Application Engineer / Developer 

Do you want to build AI and cloud-native applications that make customers go wow?  

Do you want to test the limits of software delivery, AI engineering, and application patterns?  

Do you want to build intelligent applications that no one has thought about? 

If so, this role is for you. We are searching for an application engineer or developer who naturally wants to get hands-on to build AI and cloud-native applications, pushing the limits for what is technically possible.  

Key Responsibilities: 

• Build, test and deploy modern applications 
• Reimagine software delivery in the age of AI and cloud 
• Test AI code generation to ensure it works correctly

Skills / Experience 

• Full-stack software engineering experience, designing, building and operating modern applications 
• Hands-on expertise with a tech stack consisting of modern programming languages and cloud platforms  
• Proficiency in modern software development practices, including Agile methodologies, DevOps, and CI/CD pipelines 

Key Words:

Cloud Modernisation - Cloud Modernization - Application Architect - Full Stack Engineer - Application Modernisation - AppMod - Application Engineer - Software Architect - Cloud - Azure - AWS - GCP - Application Architecture - Application Developer

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 a 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. 

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