Full Stack Engineer

Liberty Global · London

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ABOUT US

Liberty Global is a world leader in converged broadband, video and mobile communications services. We deliver next-generation products through advanced fibre and 5G networks that connect 85 million subscribers across Europe and the United Kingdom. Our businesses operate under some of the best-known consumer brands, including Virgin Media-O2 in the UK, VodafoneZiggo in The Netherlands, Telenet in Belgium, Sunrise UPC in Switzerland, Virgin Media in Ireland and UPC in Eastern Europe.

Our consolidated businesses generate annual revenue of more than $7 billion, while our joint ventures in the U.K. and the Netherlands generate combined annual revenue of more than $17 billion.

Liberty Global Ventures, our global investment arm, has a portfolio of more than 50 companies across content, technology and infrastructure, including strategic stakes in companies like Plume, ITV, Lions Gate, Univision, the Formula E racing series and several regional sports networks.

JOB PURPOSE

Design, build and evolve the AI-first telecom platforms that serve millions of Liberty Global customers across multiple countries. As a Full Stack Engineer, you will be one of the most technically skilled hands on the platform – writing production code, shaping architectural decisions, and ensuring the systems we build are scalable, secure and genuinely ready for the demands of enterprise-scale telecoms.

You will work closely with the VP Software Engineering and the wider platform team to translate architectural direction into working software, challenge technical assumptions with depth and evidence, and play a significant role in raising the engineering bar across the organisation.

KEY ACCOUNTABILITIES

Platform Design & Architecture

• Design and own critical platform components, contributing to the overall architecture and ensuring consistency with the reference architecture set by the VP Software Engineering.
• Evaluate and propose solutions to complex technical challenges, balancing performance, scalability, security and maintainability.
• Lead architecture reviews and technical design sessions for key platform features, bringing depth and rigour to the process.
• Define integration patterns and data flows across platform services, ensuring components work together reliably at scale.

Engineering & Delivery

• Write production-quality code across the full stack – from backend services and APIs through to front-end interfaces and infrastructure as code.
• Deliver features and platform capabilities end to end, from design through build, test and deployment into production.
• Contribute to production readiness: documentation, runbooks, monitoring and observability – ensuring nothing ships until it’s genuinely ready.
• Maintain and improve existing platform components, addressing technical debt and performance issues with clear prioritisation.

Standards & Quality

• Champion engineering best practices across the team: code quality, testing, CI/CD, security, and observability.
• Conduct thorough code and architecture reviews, providing constructive, evidence-based feedback that raises the standard.
• Contribute to and help maintain the engineering standards and guardrails established at VP level, making them practical and usable day to day.

Build Partner Engagement

• Work alongside build partners on platform delivery, providing technical direction and reviewing their designs and code to the same standard as internal work.
• Identify and flag risks or gaps in partner delivery early, feeding back to the VP Software Engineering with clear, actionable recommendations.

Collaboration & Knowledge Sharing

• Collaborate closely with AI/ML, DevOps, Infrastructure and Product teams to deliver integrated platform capabilities.
• Share technical knowledge across the engineering organisation – through documentation, internal talks, or hands-on pairing – building capability and reducing single points of failure.

WHAT SUCCESS LOOKS LIKE (6–12 MONTHS)

• Key platform components designed, built and running in production with strong stability, performance and security outcomes.
• Architecture decisions made with clear technical rationale, consistently documented and applied across the platform.
• Code and design reviews that visibly raise the quality bar – the team builds better because of your involvement.
• Build partner output reviewed and challenged effectively, with early identification of risks and clear escalation when needed.
• Engineering standards embedded in day-to-day practice, not just documented on a page.

KNOWLEDGE & EXPERIENCE

Essential

• Exp of hands-on full stack engineering experience, delivering complex platforms in enterprise environments.
• Strong proficiency across the full stack – backend (Python, Java or equivalent), frontend frameworks, APIs, databases and infrastructure as code.
• Depth in distributed systems design: you understand how to build services that scale, fail gracefully and recover quickly.
• Experience working with cloud-native infrastructure (AWS, GCP or Azure) and container orchestration (Kubernetes or equivalent).
• Proven ability to translate complex architectural requirements into clear, deliverable engineering plans.
• Strong experience in code and architecture review – giving and receiving feedback that improves the work.
• Comfortable working in fast-paced delivery environments with clear prioritisation and a bias for shipping.
• Experience collaborating with or reviewing the output of SI / vendor build partners.

Preferred

•  Experience building or contributing to AI/ML platforms – particularly integrating LLMs, speech, or multimodal models into production systems.

•  Familiarity with data pipelines, data quality processes and the infrastructure that supports AI/ML at scale.

•  Experience with DevOps, CI/CD pipelines and observability tooling.

•  Exposure to telecom or large-scale consumer-facing platforms.

SKILLS & BEHAVIOURAL COMPETENCIES

Technical Depth & Judgement

• Consistently makes sound technical decisions, balancing short-term delivery with long-term platform health.
• Goes deep into complex problems – doesn’t stop at the surface, finds the right answer and explains why.

Quality & Standards

• Holds themselves and others to a high bar on code quality, security and production readiness.
• Makes engineering standards better by making them practical – not just written, but followed.

Collaboration & Communication

• Works effectively across teams – engineering, product, build partners – and communicates technical decisions clearly.
• Shares knowledge generously: documentation, pairing, review – builds the team up, doesn’t hoard expertise.

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Pragmatism & Delivery

• Balances doing things right with doing things fast – pragmatic about trade-offs, clear about where corners cannot be cut.
• Owns their delivery end to end and takes pride in shipping things that work, not just things that are finished.

PRE-EMPLOYMENT SCREENING

If your application is successful, your personal data may be used for a pre-employment screening check, which will be performed by a 3rd party provider (Sterling), on behalf of Liberty Global. Depending on the vacancy and applicable law, a pre-employment screening may include employment history, qualifications, contract information, right to work, and other information (such as media information) that may be necessary for determining your qualifications and suitability for the position.

You can read more about how we process your data here: Privacy & Security Policy – Liberty Global. If you wish to exercise your privacy rights please contact: Peopleservices@Libertyglobal.com

Liberty Global is an equal opportunity employer. If you are curious and resilient with a limitless mindset, we’re eager to hear from you, no matter your background.

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