Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Lead a team of React developers and create innovative legal tech solutions.
- Company: Join Definely, a forward-thinking LegalTech company backed by industry giants.
- Benefits: Enjoy competitive salary, equity, hybrid work, and generous holiday allowance.
- Why this job: Shape the future of legal technology while mentoring a talented team.
- Qualifications: 5+ years in React development with strong leadership skills.
- Other info: Be part of a dynamic team with excellent growth opportunities.
The predicted salary is between 36000 - 60000 ÂŁ per year.
Join to apply for the Staff React Engineer role at Definely. Following our recent $30M Series B funding, we are expanding the team to accelerate development of our legal technology products integrating with Microsoft products through Office.js.
About the Role
We are looking for a Staff Engineer to guide two mid‑senior React developers, providing architectural guidance and technical direction. You will shape product direction and product triad.
What you’ll do
- Team Leadership & Mentorship – Lead and inspire a team of React developers, foster collaboration, mentor, promote best practices, maintain high code quality.
- Technical Excellence – Architect and develop sophisticated React applications integrated with Microsoft Word, M365, Word Online using Office.js, write clean, efficient code, drive scalable solutions, think outside of OfficeJS limitations.
- Product Development – Collaborate with cross‑functional teams to deliver innovative features, create exceptional UIs prioritising UX and accessibility, optimize performance.
- Quality & Documentation – Establish testing, debugging processes, maintain documentation, implement security best practices.
- Problem Solving & Innovation – Troubleshoot complex challenges, contribute to architectural discussions, improve developer productivity via tooling and AI.
What you’ll bring
- Minimum 5 years of product‑focused React development experience.
- Proven leadership in software development teams.
- Expert proficiency in React, TypeScript, JavaScript, HTML, CSS.
- Strong experience with Microsoft Office integration (Office.js, Word add‑ins).
- Experience with agentic coding assistants such as Claude Code.
- Excellent English communication skills.
- Demonstrated ability to work autonomously with clear direction to others.
- Extensive experience in remote environments.
- Passion for knowledge sharing and team growth.
- Optimization skills for React (memoization, code splitting, etc.).
- Strong grasp of Git, CI/CD pipelines.
- Excellent problem‑solving, collaboration, and communication skills.
- Ability to work effectively in a fast‑paced, agile environment.
We’ll be lucky if you have
- Knowledge of Microsoft Office Add‑in guidelines and Office Store submission processes.
- Background in LegalTech or professional services software.
- Experience with in‑browser text editors and performance optimization.
- Experience in product‑focused or startup environments.
- Exposure to AI‑powered developer tools and workflows.
What we offer
- Competitive salary & annual bonus
- Equity in Definely
- Quarterly team socials & annual company offsite
- Hybrid working (Tues & Thurs in‑office) + 1 month “work from anywhere”
- 25 days holiday + bank holidays
- ÂŁ750 annual learning & development budget
- Private healthcare (incl. dental & optical)
- Enhanced parental leave
- Additional perks: Cycle to Work, Workplace Nursery salary sacrifice scheme, top‑quality equipment
About Definely
At Definely, we simplify how legal professionals access and understand complex information in legal documents. Trusted by a global community, our LegalTech solutions integrate seamlessly into lawyers’ daily workflows, making drafting, reviewing, and navigating contracts faster and safer. Joining Definely means being part of a forward‑thinking, collaborative team that prioritises innovation and people. We support growth and success for our team and customers. Recognised in the top 25 of Deloitte’s prestigious UK Technology Fast50 in 2023 and backed by Microsoft, Google, and Octopus Ventures, we are trusted by leading law firms and in‑house legal teams worldwide.
Staff Engineer in City of London employer: Definely
Contact Detail:
Definely Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Staff Engineer in City of London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work at Definely or similar companies. A friendly chat can sometimes lead to insider info about job openings or even a referral.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best React projects, especially any that involve Microsoft Office integration. This will give you an edge and demonstrate your technical excellence right off the bat.
✨Tip Number 3
Prepare for the interview by brushing up on your leadership and mentoring experiences. Be ready to share specific examples of how you've guided teams and fostered collaboration in past roles.
✨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, it shows you’re genuinely interested in joining our awesome team at Definely.
We think you need these skills to ace Staff Engineer in City of London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Staff Engineer role. Highlight your experience with React, TypeScript, and Microsoft Office integration. We want to see how your skills align with what we're looking for!
Showcase Leadership Experience: Since this role involves guiding a team, don’t forget to showcase any leadership or mentorship experience you have. We love seeing how you've inspired others and promoted best practices in your previous roles.
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about legal technology and how you can contribute to our mission at Definely. We want to know what makes you tick!
Apply Through Our Website: We encourage you to apply through our website for a smoother process. It helps us keep track of applications and ensures you get all the updates directly from us. Plus, it’s super easy!
How to prepare for a job interview at Definely
✨Know Your Tech Inside Out
Make sure you brush up on your React, TypeScript, and Office.js skills. Be ready to discuss how you've used these technologies in past projects, especially in integrating with Microsoft products. This will show that you’re not just familiar with the tech but can also apply it effectively.
✨Showcase Your Leadership Skills
Since this role involves guiding mid-senior developers, be prepared to share examples of how you've led teams in the past. Talk about your mentoring style, how you foster collaboration, and any best practices you’ve implemented to maintain high code quality.
✨Prepare for Problem-Solving Scenarios
Expect to face some technical challenges during the interview. Think of complex problems you've solved in previous roles and be ready to walk through your thought process. Highlight your innovative solutions and how they improved developer productivity or user experience.
✨Understand the Product and Company Culture
Do your homework on Definely and its LegalTech products. Familiarise yourself with their mission and values, and think about how your experience aligns with their goals. Showing genuine interest in the company will set you apart and demonstrate that you’re a good cultural fit.
