Senior Frontend Developer
Senior Frontend Developer

Senior Frontend Developer

Full-Time 60000 - 80000 £ / year (est.) No home office possible
Definely

At a Glance

  • Tasks: Design and build sophisticated React applications for legal professionals worldwide.
  • Company: Join Definely, a forward-thinking LegalTech company backed by industry giants.
  • Benefits: Competitive salary, share options, remote work, and a £750 learning budget.
  • Why this job: Shape the future of legal tech while mentoring others and driving innovation.
  • Qualifications: 4+ years in React development and strong collaboration skills.
  • Other info: Dynamic team culture with excellent career growth opportunities.

The predicted salary is between 60000 - 80000 £ per year.

We’re looking for a Senior Engineer with strong technical depth and a passion for building exceptional user experiences. You’ll play a key role in shaping our front-end architecture, collaborating closely with product and design teams, and delivering scalable, performant solutions used by legal professionals worldwide.

As a senior member of the team, you’ll act as a technical expert and a trusted partner helping to guide best practices, influence decisions, and mentor others through collaboration and example.

What you’ll do:

  • Design and build sophisticated React applications integrating with Microsoft Word, M365, and other Office products using Office.js.
  • Write clean, scalable, and maintainable code while driving performance and reliability.
  • Collaborate with product, design, and engineering teams to deliver user-focused, accessible features.
  • Contribute to architectural discussions and help shape the evolution of our tech stack.
  • Mentor and support team members through knowledge sharing, code reviews, and best practice guidance.
  • Troubleshoot complex technical challenges and drive continuous improvement through automation and AI-assisted workflows.
  • Maintain high-quality standards with robust testing, documentation, and security practices.

What you’ll bring:

  • 4+ years of hands-on experience building production React applications.
  • Familiarity with agentic coding assistants such as Claude Code or similar AI tools.
  • Excellent communication and collaboration skills in English.
  • Proven ability to work independently while contributing effectively to team goals.
  • Experience working successfully in hybrid or remote development environments.
  • Solid understanding of React performance optimisation (e.g. memoisation, code splitting, avoiding unnecessary re-renders).
  • Experience with Git, version control best practices, and CI/CD pipelines.

We’ll be lucky if you have:

  • Knowledge of Microsoft Office Add-in guidelines and Office Store submission processes.
  • Prior experience in product-focused or startup environments.
  • Exposure to AI-powered developer tools and automation workflows.

What we offer:

  • Competitive salary + bonus
  • Share options
  • Quarterly team socials & annual company offsite
  • Hybrid or remote working for this role
  • 1 month “work from anywhere”
  • Take your birthday off
  • £750 annual learning & development budget
  • Enhanced parental leave
  • Additional perks: Cycle to Work, Workplace Nursery salary sacrifice scheme, and top-quality equipment

At Definely, we’re on a mission to simplify the way legal professionals access and understand complex information in legal documents. Trusted by a global community of customers, our LegalTech solutions integrate seamlessly into lawyers' daily workflows, making it easier to draft, review and navigate even the most complex contracts.

Joining Definely means becoming part of a forward-thinking, collaborative team that prioritises innovation and people. We create a supportive environment driven by a shared commitment to connection, growth and success.

Senior Frontend Developer employer: Definely

At Definely, we pride ourselves on being an exceptional employer that fosters a culture of innovation and collaboration. As a Senior Frontend Developer, you'll enjoy competitive salaries, share options, and a generous learning budget, all while working in a supportive environment that values your growth and well-being. With the flexibility of hybrid or remote work, plus unique perks like a month of 'work from anywhere' and enhanced parental leave, we ensure our team members thrive both personally and professionally.
Definely

Contact Detail:

Definely Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Frontend Developer

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 React projects and any cool integrations you've done with Microsoft products. This will give potential employers a taste of what you can bring to the table.

Tip Number 3

Prepare for those interviews! Brush up on common technical questions related to React and performance optimisation. Practising coding challenges can also help you feel more confident when it’s time to shine.

Tip Number 4

Apply through our website! We love seeing applications come directly from passionate candidates. Plus, it gives you a chance to showcase your enthusiasm for joining our innovative team at Definely.

We think you need these skills to ace Senior Frontend Developer

React
Office.js
Performance Optimisation
Git
CI/CD Pipelines
Communication Skills
Collaboration Skills
Mentoring
Troubleshooting
Testing Practices
Documentation
Security Practices
Agile Development
Knowledge of Microsoft Office Add-in Guidelines

Some tips for your application 🫡

Show Off Your Skills: When you're writing your application, make sure to highlight your experience with React and any cool projects you've worked on. We want to see how you can bring exceptional user experiences to life!

Be Clear and Concise: Keep your application straightforward and to the point. Use clear language to describe your past roles and responsibilities, especially those that relate to front-end development and collaboration with teams.

Tailor Your Application: Make sure to customise your application for us! Mention specific technologies and practices from the job description that you’re familiar with, like Office.js or performance optimisation techniques.

Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any important updates from our team!

How to prepare for a job interview at Definely

Know Your Tech Stack

Make sure you’re well-versed in React and the specific technologies mentioned in the job description, like Office.js. Brush up on performance optimisation techniques such as memoisation and code splitting, as these will likely come up during technical discussions.

Showcase Your Collaboration Skills

Since this role involves working closely with product and design teams, be prepared to discuss your past experiences in collaborative environments. Share examples of how you’ve successfully mentored others or contributed to team goals, especially in hybrid or remote settings.

Prepare for Architectural Discussions

Think about how you would approach architectural decisions and improvements. Be ready to share your thoughts on evolving tech stacks and how you’ve contributed to similar discussions in previous roles. This shows you’re not just a coder but a strategic thinker.

Demonstrate Problem-Solving Skills

Expect to face some complex technical challenges during the interview. Prepare to discuss how you’ve troubleshot issues in the past and driven continuous improvement through automation or AI tools. This will highlight your ability to think critically and adapt.

Senior Frontend Developer
Definely

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