Senior Application Engineer

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 more than 60 nationalities. We serve more than 5.5 million customers every day in over 175 countries, with a global ecosystem of market‑leading partners. Global strategic hubs: Spain, Brazil, the UK, Germany.

Values: Open, Bold, Trusted

Job Description

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

Additional Information

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.

Inclusive Workplace

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.

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.

Job Details

Seniority level: Mid‑Senior level

Employment type: Full‑time

Job function: Information Technology

Location: London, England, United Kingdom