Definely - Staff Frontend Engineer
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Requirements
• Minimum 5 years of hands-on, product-focused experience with React development • Proven leadership experience in software development teams • Expert-level proficiency in React, TypeScript, JavaScript, HTML, CSS, and modern web technologies • Strong experience with Microsoft Office integration, particularly Office.js and Word add-ins • Experience with agentic coding assistants such as Claude Code • Excellent English communication skills, both written and verbal • Demonstrated ability to work autonomously while providing clear direction to others • Extensive experience working effectively in remote environments • Passion for knowledge sharing and helping team members grow • Know how to optimize React apps (prevent useless re-rendering, memoization, code splitting etc) • Strong grasp of Git, version control best practices, and CI/CD pipelines. • Excellent problem-solving, communication, and collaboration skills. • Ability to work effectively in a fast-paced, agile environment. • Previous experience working with in-browser text editors, specially if you were part of optimisation efforts to make the experience snappier. • Experience in product-focused or startup environments. • Exposure to other AI-powered developer tools and workflows.
Responsibilities
• Lead and mentor a team of React developers, fostering collaboration, growth, and high coding standards • Architect and develop complex React applications integrated with Microsoft Word, M365, and Word Online using Office.js • Write clean, efficient, and maintainable code while ensuring scalable, high-performance solutions • Collaborate with cross-functional teams to deliver innovative, user-centric, and accessible features • Optimise application performance and responsiveness, overcoming Office.js limitations creatively • Establish strong testing, debugging, and documentation practices to maintain quality and reliability • Implement security best practices to protect user data and maintain system integrity • Troubleshoot complex technical issues and contribute to architectural decisions and tech-stack evolution • Enhance developer productivity through tooling, automation, and AI-assisted coding
Benefits
• London | Hybrid£100K – £130K • Offers Equity • Offers Bonus • Up to 16% annual bonus based on company and individual performance • UK | Remote£90K – £115K • Offers Equity • Offers Bonus • Up to 16% annual bonus based on company and individual performance • Upload your resume here to autofill key application fields. • Drop your resume here! • Parsing your resume. Autofilling key fields... • Please note: we’ve introduced application limits across all roles to help us keep our process fair and focused for every candidate. • Please note: • Candidates may submit one application within any 90 day period across any of our open roles. • We really appreciate everyone’s interest in joining Definely and this approach allows us to give each application the time and attention it deserves. • Please provide your full name • Please attach your CV • or drag and drop here • Please give us your salary expectations in your local currency • We require a linked professional profile to verify applicant authenticity and prevent AI-generated or fake applications. This helps ensure fairness, transparency, and integrity in our hiring process. • If yes, please let us know what would be helpful. We are committed to running an inclusive and accessible hiring process. This information will be treated confidentially and will only be used to support your application. • I prefer not to answer • Another Gender Identity • Heterosexual / straight • Asian or Asian American • Black or African American • Hispanic or Latine • Indigenous or Native American • Native Hawaiian or Other Pacific Islander • Person with disability • Refugee or immigrant • None of the above • Definely may use Artificial Intelligence with this application. Learn more.
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