At a Glance
- Tasks: Lead the design and development of innovative web applications and user experiences.
- Company: Join Solirius Reply, a dynamic tech consultancy with a collaborative culture.
- Benefits: Enjoy competitive salary, private healthcare, flexible working, and generous leave policies.
- Other info: Opportunities for professional growth and involvement in diverse projects.
- Why this job: Make a real impact by solving complex problems with cutting-edge technology.
- Qualifications: Expertise in front-end development, JavaScript, and modern frameworks required.
The predicted salary is between 70000 - 90000 £ per year.
About Us
Solirius Reply, part of the Reply Group, delivers technical consultancy and application delivery to our clients in order to solve real world problems and allow our clients to respond to an ever-changing technical landscape. We partner closely with our clients, embedding our consultants into their businesses in order to provide a bespoke service, allowing us to truly understand our clients’ needs. It is this close collaboration with our clients that has enabled us to grow rapidly in recent years and will drive our ambitious future growth plans. We currently have over 300 consultants working with a variety of key clients from both the public and private sectors such as the Ministry of Justice, Department for Education, FCDOS, UEFA, International Olympic Committee and Mercedes Benz; with plans to increase our client base further in the near future. We operate as a flat organisation and believe in trusting and supporting our team to operate independently. We pride ourselves on being specialists at what we do, making the most of our consultants’ expertise in their fields in order to provide a best-in-class service to our clients. All our consultants have the opportunity to work on a range of different projects, providing a broad range of knowledge on which to develop their careers and progress in the direction they choose.
About you:
You are a motivated and adaptable professional with a strong analytical mindset and a passion for using technology to solve real-world problems. You enjoy working in collaborative, agile teams and take pride in delivering high-quality solutions that make a tangible impact. With strong communication skills and a consultative approach, you’re comfortable engaging with clients, understanding their needs, and translating them into effective outcomes. You understand and align with Solirius Reply Values.
The Role:
We are seeking a highly experienced Principal Front End Engineer to lead the architecture, development, and evolution of our web applications and user experiences. This role combines hands-on technical leadership with strategic influence across engineering, product, and design teams. As a Principal Engineer, you will define front-end standards, mentor engineers, drive platform scalability, and ensure exceptional performance, accessibility, and usability across our products.
Key Responsibilities:
- 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
Key Skills/Experience:
- 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
Preferred Qualifications:
- Experience with micro-frontends or distributed front-end architectures
- Familiarity with cloud platforms such as AWS, Azure, or GCP
- Experience with GraphQL and modern API integration patterns
- Knowledge of observability and monitoring tools
- Experience leading globally distributed engineering teams
- Contributions to open-source projects or technical communities
Benefits
What We Offer:
- 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
Equality & Diversity:
Solirius Reply is an equal opportunities employer. We are committed to creating a work environment that supports, celebrates, encourages, and respects all individuals and in which all processes are based on merit, competence and business needs. We do not discriminate on the basis of race, religion, gender, sexuality, age, disability, ethnicity, marital status or any other protected characteristics. Should you require further assistance or require any reasonable adjustments be put in place to better support your application process, please do not hesitate to raise this with us.
Principal Front End Engineer in London employer: Solirius Consulting
At Solirius Reply, we pride ourselves on fostering a collaborative and innovative work culture that empowers our employees to thrive. As a Principal Front End Engineer, you will have the opportunity to lead impactful projects while benefiting from a competitive salary, private healthcare, and generous training allowances. Our commitment to employee growth, flexible working arrangements, and a diverse environment makes us an exceptional employer for those seeking meaningful and rewarding careers in technology.
StudySmarter Expert Advice🤫
We think this is how you could land Principal Front End Engineer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the industry, attend meetups, and engage with online communities. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best projects and contributions. This is your chance to demonstrate your expertise in front-end development and make a lasting impression on potential employers.
✨Tip Number 3
Prepare for interviews by practising common technical questions and scenarios. Mock interviews with friends or mentors can help you feel more confident and articulate your thought process clearly.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who are proactive about their job search!
We think you need these skills to ace Principal Front End Engineer in London
Some tips for your application 🫡
Tailor Your Application:Make sure to customise your CV and cover letter to highlight your experience with front-end technologies like JavaScript, React, or Angular. We want to see how your skills align with the role, so don’t hold back on showcasing your relevant projects!
Show Your Passion:Let us know why you’re excited about this position! Share your enthusiasm for solving real-world problems through technology and how you enjoy working in collaborative, agile teams. A bit of personality goes a long way!
Highlight Your Leadership Skills:As a Principal Front End Engineer, we’re looking for someone who can mentor others and lead technical initiatives. Be sure to include examples of how you've guided teams or influenced project outcomes in your previous roles.
Apply Through Our Website:We encourage you to submit your application directly through our website. It’s the best way for us to receive your details and ensures you’re considered for the role. Plus, it’s super easy!
How to prepare for a job interview at Solirius Consulting
✨Know Your Tech Stack
Make sure you’re well-versed in JavaScript, TypeScript, HTML5, and CSS3, as these are crucial for the Principal Front End Engineer role. Brush up on modern frameworks like React or Vue, and be ready to discuss your experience with them in detail.
✨Showcase Your Problem-Solving Skills
Prepare examples of how you've used technology to solve real-world problems. Think about specific projects where you led the design and implementation of scalable front-end architectures, and be ready to explain your thought process.
✨Emphasise Collaboration
Since this role involves working closely with Product, Design, and Back-End teams, highlight your experience in collaborative environments. Share stories that demonstrate your consultative approach and how you’ve engaged with clients to understand their needs.
✨Prepare for Technical Questions
Expect to dive deep into front-end architecture patterns and performance optimisation techniques. Be ready to discuss testing strategies and CI/CD pipelines, as well as any experience you have with micro-frontends or cloud platforms like AWS.
