Staff Software Engineer

🕒 May 11

🏢🏡 London – Hybrid

⏰ Full Time

🔴 Lead

🧑‍💻 Full-stack Engineer

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Definely

WebsiteLinkedIn

51 - 200 employees

Founded 2017

☁️ SaaS

🤖 Artificial Intelligence

🤝 B2B

SaaS • Artificial Intelligence • B2B

Definely is an AI-powered legal drafting and contract review platform designed for law firms and in-house legal teams. Integrated natively into Microsoft Word and offered as a suite of tools (Vault, Draft, Enhance, Cascade, Proof, PDF), Definely leverages large language models on an organization’s proprietary contract repository to surface precedent clauses, track the knock-on effects of edits, automate hundreds of proofreading checks, and extract defined terms from PDFs—while fitting into existing legal workflows.

📋 Description

• Lead the development of product features end-to-end, from problem shaping with product and design through to backend implementation, frontend delivery, and iteration • Design and build scalable, reliable systems that power AI-driven features and workflows • Translate complex AI capabilities into intuitive, performant, and trustworthy product experiences • Work across the stack using TypeScript and Python, contributing to both user-facing applications and backend systems • Drive improvements in performance, reliability, and overall product quality across the stack • Contribute to technical strategy and architectural decisions across the engineering team • Collaborate closely with design to deliver high-quality user experiences, while ensuring strong underlying system design • Raise the bar for engineering standards, including code quality, testing, and observability • Mentor and support other engineers, helping to elevate technical capability across the team

🎯 Requirements

• Significant experience building and scaling complex, user-facing products across the stack • Strong experience with modern frontend development (React, TypeScript) and solid backend experience (e.g. Python or similar) • Ability to design and reason about distributed systems, APIs, and data flows • Strong product mindset, you think in terms of user problems and outcomes, not just implementation • Experience working closely with product and design to shape solutions, not just deliver them • Ability to take ownership of ambiguous problems and drive them through to impact • Experience contributing to or leading architectural decisions across systems • Strong communication skills and ability to influence across teams

🏖️ Benefits

• Competitive salary & annual bonus based on performance • Equity in Definely • Quarterly team socials + holiday parties • Hybrid working + 1 month “work from anywhere” • 25 days holiday + bank holidays • Take your birthday off • £750 annual learning & development budget • Private healthcare (incl. dental & optical) • Enhanced parental leave + Workplace Nursery salary sacrifice scheme • Additional perks: Cycle to Work • Top-quality equipment

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