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Location
In office (London)
Seniority
Principal · 12+ years exp
Visa
Licensed UK visa sponsor
Employment
Full-Time

Confirmed on the employer's own hiring board on Nov 8, 2026. First seen by Alion on Oct 4, 2026. Meta scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Meta Platforms is an American technology company founded in 2004 as Facebook and renamed in 2021 to signal its investment in immersive computing. It operates the largest family of social and messaging applications in the world, comprising Facebook, Instagram, WhatsApp, Messenger and Threads, and earns almost all of its revenue from advertising sold against that audience. Headquartered in Menlo Park, California, the company also develops the open Llama language models and the Reality Labs division behind Quest headsets and Ray-Ban smart glasses.
Meta is seeking principal engineers to join our teams in building cutting-edge products that connect billions of people around the world. As a member of our team, you will oversee complex technical problems, build new features, and improve existing products across various platforms, including mobile devices and web applications. Our teams continuously improve the user experience, and we're looking for passionate individuals who can help us advance the way people connect globally. If you're interested in leading a team of engineers and researchers to work on exciting projects that have significant impact, we encourage you to apply.

Responsibilities

Drive the team's goals and technical direction to pursue opportunities that make your larger organization more efficient Effectively communicate complex features and systems in detail Understand industry & company-wide trends to help assess & develop new technologies Partner & collaborate with organization leaders to help improve engineering quality and delivery outcomes across the team and organization Identify new opportunities for the larger organization & influence the appropriate people for staffing/prioritizing these new ideas Lead long term technical vision and roadmap for large cross-company efforts Suggest, collect and synthesize requirements and create an effective feature roadmap Identify and resolve performance and scalability issues, and drive large efforts to reduce technical debt

Qualifications

Experience driving large cross-functional/industry-wide engineering efforts Experience influencing executive stakeholders through technical strategy proposals and cross-organizational roadmap alignment Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience Experience communicating and working across functions to drive solutions Proven track record of planning multi-year roadmap in which short-term projects ladder to the long-term mission 12+ years of programming experience in a relevant language OR 8+ years of programming experience in a relevant language with a PhD Experience utilizing data and analysis to explain technical problems and provide detailed feedback and solutions Demonstrated ongoing AI skill development (e.g., prompt/context engineering, agent orchestration) and staying current with emerging AI technologies Shipped at least one large-scale product to production, supporting millions of active users Demonstrated ability to integrate AI tools to optimize/redesign workflows and drive measurable impact (e.g., efficiency gains, quality improvements) Experience adhering to and implementing responsible, ethical AI practices (e.g., risk assessment, bias mitigation, quality and accuracy reviews) Experience building maintainable and testable code bases, including API design and unit testing techniques Experience building Android applications in Java using Android SDK Experience with multithreading programming and mobile memory management

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