Staff Software Engineer

About the role

Were looking for a high-calibre Staff Software Engineer to help shape how we build and scale our products at Definely.

Were looking for someone who is highly product-minded intellectually curious and motivated by solving meaningful user this role youll operate across the stack shaping both the user experience and the underlying systems while helping define how we design build and scale our platform.

Youll work closely with product design and engineering leadership to shape both what we build and how we build it. As a Staff Engineer youll drive technical and product decisions raise the bar for quality and play a key role in evolving our architecture as we scale.

What youll do

• 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

What youll bring:

• 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

Well be lucky if you:

• Have led or significantly shaped architecture in a scaling product

• Have experience building AI-powered or data-heavy user experiences

• Enjoy working in product-driven fast-paced environments

• Care deeply about usability performance and craft in development

• Have experience mentoring or acting as a technical leader across teams

What we can offer you:

• 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

About Definely

At Definely were building the Review layer for legal work in the age of AI.

As AI transforms how contracts are drafted the challenge is no longer just generation its verification. Lawyers remain accountable for what goes out the door but the volume and complexity of AI-generated work is pushing traditional review to its limits.

Definely gives lawyers a structured way to understand and verify complex agreements modelling contracts as systems of definitions cross-references and dependencies surfacing hidden risks and making review more rigorous and defensible.

Trusted by leading law firms and global enterprises including A&O Shearman Slaughter and May BP and Barclays we integrate directly into the tools lawyers already use.

We recently raised our Series B and are backed by Microsoft Google and Octopus Ventures. This is a rare opportunity to shape a new category at the moment it becomes essential.

Data Privacy Notice

By submitting your application you agree that DEFEYENE LEGAL SOLUTIONS LIMITED (Definely) may collect process and store your personal data as part of our recruitment process. We will use the information you provide to assess your qualifications for the role you are applying for and to communicate with you regarding your personal data will be stored for up to 12 months after which it will be securely deleted unless we have another lawful basis to retain it. You have the right to access correct or request the deletion of your data at any more details on how we handle your personal data and your rights please send us an email to and we will send your our privacy policy.

If you have any concerns about how your data is being processed please do not hesitate to contact us.

Required Experience:

Staff IC