Test Automation Engineer (Word Add-In)

The role

Were looking for an experienced Test Automation Engineer with strong expertise in both manual and automated testing to ensure the quality reliability and performance of Definelys innovative LegalTech products.

In this role youll take the lead in fully automating our Microsoft Word Add-In across both Windows and OfficeJS (web-based) including AI-powered features that help legal professionals draft review and execute contracts with greater speed and accuracy.

Our customers rely on Definely for accuracy trust and seamless workflows and youll be a key player in maintaining these high standards while scaling our testing capabilities across multiple platforms.

Key Responsibilities

• Gain a deep understanding of Definelys products and business use cases designing comprehensive test strategies plans and scripts for maximum coverage.

• Develop maintain and execute automated test suites in C# for AI and non-AI services.

• Perform end-to-end testing across both Windows and OfficeJS (web) platforms including acceptance integration UI/UX performance security smoke and regression testing.

• Design and execute automation for the OfficeJS version of the Word Add-In ensuring consistent behavior across desktop and web environments.

• Create and maintain clear test documentation ensuring traceability and reproducibility for all tests.

• Identify log and track defects with detailed reports collaborating with developers to improve software stability and user experience.

• Actively participate in code reviews and QA process improvements advocating for best practices and continuous quality enhancements.

• Continuously improve testing coverage and efficiency by introducing new tools frameworks and AI-assisted testing techniques (e.g. GitHub Copilot Claude Code).

• Collaborate closely with product managers architects developers and QA engineers to align on quality goals and deliverables.

About you

• 5 years of professional product focused testing experience (manual and automation) for desktop and/or web applications including API and end-to-end testing expertise.

• Proficient in C# for building maintaining and executing automated test suites.

• Strong knowledge of software QA methodologies tools and processes.

• Experience mapping test strategies to requirements creating detailed test plans preparing test data and executing tests efficiently.

• Familiarity with AI-assisted tooling (e.g. GitHub Copilot Claude Code) to improve testing speed and reliability.

• Hands-on experience with test case management tools (e.g. TestRail).

• Solid understanding of relational and/or non-relational databases.

• Comfortable working with agile development practices such as Scrum or Kanban.

• Excellent collaboration and communication skills with experience working closely with developers and cross-functional teams.

• Familiarity with tools like Postman Linear Notion GitHub TeamCity Octopus Deploy and cloud platforms such as Microsoft Azure and AWS.

• A self-starter who takes ownership enjoys learning and sharing knowledge and has a practical down-to-earth approach.

Nice to have

• Experience testing AI/LLM-based solutions including model accuracy correctness and performance validation.

• Familiarity with Azure OpenAI Service AWS Bedrock or similar AI platforms.

• Experience testing OfficeJS applications or add-ins.

• Background in the LegalTech domain or other highly regulated industries.

• QA certifications (e.g. ISTQB) or other relevant software testing certifications.

About Definely

At Definely were on a mission to simplify the way legal professionals access and understand complex information in legal documents. Trusted by a global community of customers our LegalTech solutions integrate seamlessly into lawyers daily workflows making it easier to draft review and navigate even the most complex contracts.

Our products provide instant access to essential information enabling legal teams to review clauses and provisions in context reduce risk and work more efficiently all without disrupting their flow. At Definely were dedicated to solving real challenges faced by legal professionals.

Joining Definely means becoming part of a forward-thinking collaborative team that prioritises innovation and people. We create a supportive environment driven by a shared commitment to connection growth and success.

Recognised in the top 25 of Deloittes prestigious UK Technology Fast50 in 2023 and backed by Microsoft Google and Octopus Ventures were trusted by leading law firms and in-house legal teams including A&O Shearman Dentons Deloitte and Barclays to streamline their workflows and mitigate risks.

What we offer

Competitive Salary

• We offer a highly competitive salary that reflects your skills experience and contributions.

Impact & Growth

• Join a fast-growing startup where your ideas matter; experiment innovate and see your work come to life.

High-Performance Culture

• Work in a truly meritocratic environment alongside ambitious driven professionals who push each other to excel.

Prestigious Partnerships

• Collaborate with some of the worlds top law firms financial institutions and multinational corporations.

Prime London Location & Hybrid Flexibility

• Enjoy a vibrant office in the heart of Aldgate with the option to work in a hybrid environment. We tend to come into the office 2-3 times a week although you can come in more!

Ongoing Learning & Development

• Access top-tier training mentorship and continuous support to advance your career.

Time Off

• Enjoy 25 days of holiday per year plus UK bank holidays to recharge and unwind.

Pension Plan

• Secure your future with our competitive pension scheme.

Private Healthcare

• Access to Vitality healthcare including dental and optical.

Flexible Working

• Work in a way that suits your lifestyle with the freedom to balance professional and personal priorities.

Enhanced Parental Leave

• We support working parents with generous parental leave policies that go far beyond statutory requirements.

Cycle to Work Scheme

• Save on a new bike and accessories while promoting a healthier more sustainable commute.

Workplace Nursery Scheme

• Saving working parents lots of money through our salary sacrifice scheme!

Top-Quality Equipment

• Get the tools you need to perform at your best from cutting-edge tech to ergonomic office setups.

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.