Principal Front End Engineer

Solirius Consulting

Principal Front End Engineer shaping architecture and development of web apps. Leading UI standards and mentoring engineers in a collaborative environment.

Posted 5/27/2026full-timeLondon • 🇬🇧 United KingdomLeadWebsite

Tech Stack

Tools & technologies

AngularAWSAzureCloudCypressGoogle Cloud PlatformGraphQLJavaScriptJestNext.jsReactTypeScriptVue.js

About the role

Key responsibilities & impact

Lead the design and implementation of scalable, maintainable front-end architectures
Drive technical strategy and establish engineering best practices for UI development
Build high-performance, responsive, and accessible web applications
Collaborate closely with Product, Design, and Back-End Engineering teams to deliver exceptional user experiences
Own and evolve shared component libraries, design systems, and front-end tooling
Improve application performance, reliability, observability, and developer experience
Mentor senior and mid-level engineers through technical guidance, code reviews, and architectural leadership
Evaluate and introduce modern front-end technologies and frameworks where appropriate
Influence roadmap planning and technical decision-making across multiple teams
Champion testing strategies including unit, integration, visual regression, and end-to-end testing
Ensure adherence to accessibility, security, and compliance standards
Lead incident response and root cause analysis for front-end production issues

Requirements

What you’ll need

Software engineering experience with significant focus on front-end development
Deep expertise in JavaScript, TypeScript, HTML5, and CSS3
Extensive experience with modern frameworks such as React, Next.js, Vue, or Angular
Strong understanding of front-end architecture patterns, state management, and component-driven development
Experience building and scaling design systems and reusable UI platforms
Strong knowledge of web performance optimisation techniques
Expertise in accessibility standards (WCAG) and responsive design
Experience with testing frameworks such as Jest, Cypress, Playwright, or Vitest
Strong understanding of CI/CD pipelines and modern development workflows
Proven track record of leading large-scale technical initiatives
Excellent communication and stakeholder management skills
Experience with micro-frontends or distributed front-end architectures (preferred)
Familiarity with cloud platforms such as AWS, Azure, or GCP (preferred)
Experience with GraphQL and modern API integration patterns (preferred)
Knowledge of observability and monitoring tools (preferred)
Experience leading globally distributed engineering teams (preferred)
Contributions to open-source projects or technical communities (preferred)

Benefits

Comp & perks

Competitive Salary
Bonus Scheme
Private Healthcare Insurance
25 Days Annual Leave + Bank Holidays
Up to 10 days allocated for development training per year
Enhanced Parental Leave
Paid Fertility Leave (5 Days)
Statutory & Contributory Pension
EAP with Help@Hand
Gym Membership Benefits
Flexible Working
Annual Away Days/Company Socials

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaScriptTypeScriptHTML5CSS3ReactNext.jsVueAngularweb performance optimisationaccessibility standards (WCAG)

Soft Skills

communicationstakeholder managementmentoringtechnical guidancearchitectural leadership