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: Be part of a diverse team with excellent career growth opportunities.
- 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 like React or Angular.
The predicted salary is between 80000 - 100000 £ 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.
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 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 Reply
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, extensive training opportunities, and a commitment to work-life balance through flexible working arrangements. Our dedication to equality and diversity ensures a supportive environment where your contributions are valued and your career can flourish.
StudySmarter Expert Advice🤫
We think this is how you could land Principal Front End Engineer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Solirius Reply or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Solirius Reply.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Solirius Reply.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Solirius Reply that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Principal Front End Engineer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Solirius Reply.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Solirius Reply and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Solirius Reply
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Solirius Reply uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
