Definely · 2 months ago
Senior Software Engineer (React)
United States
Full-time
Remote
Mid, Senior Level
4+ years expDefinely is on a mission to simplify the way legal professionals access and understand complex information in legal documents. The Senior Software Engineer will play a key role in shaping the front-end architecture and collaborating closely with product and design teams to deliver scalable solutions for legal professionals.
Artificial Intelligence (AI)LegalLegal TechSaaSSoftware
Responsibilities
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
Qualification
Required
4+ years of hands-on experience building production React applications
Strong proficiency in React, TypeScript, JavaScript, HTML, CSS, and modern web technologies
Experience integrating with Microsoft Office, especially Office.js and Word add-ins
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
Preferred
Knowledge of Microsoft Office Add-in guidelines and Office Store submission processes
Experience optimising in-browser text editors for speed and responsiveness
Prior experience in product-focused or startup environments
Exposure to AI-powered developer tools and automation workflows
Benefits
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
£750 annual learning & development budget
Private healthcare (incl. dental & optical)
Enhanced parental leave
Additional perks: Cycle to Work, Workplace Nursery salary sacrifice scheme, and top-quality equipment
Company
Definely
Definely is a legal tech company that develops AI-powered tools for drafting, editing, and proofreading legal documents.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$42.51MKey Investors
Innovate UKRaine VenturesOctopus Ventures
2025-06-09Series B· $30M
2024-07-31Grant· $0.75M
2024-07-18Series Unknown
Leadership Team
Feargus MacDaeid
Co-Founder & Chief Strategy Officer
Recent News
2025-08-29
2025-06-18
2025-06-16
Company data provided by crunchbase