Legal Prompt Engineer in London

We build legal drafting technology for moments that matter — when the stakes are high, the documents are complex, and speed can’t come at the cost of control. Our platform helps legal teams move faster through contracts using automation, collaboration, and AI — without taking judgment away from the lawyers who own the risk. We believe technology should amplify expertise, not replace it. Avvoka is trusted by leading law firms, banks, and global enterprises, and we’ve grown through product strength and word of mouth alone. With headcount and revenue increasing by over 70% year on year, we’re now scaling from a product‑led success into a globally recognised legal‑tech brand. We’re at an inflection point: evolving how the world’s most sophisticated legal teams work — and building a company where thoughtful people can do the best work of their careers.

Why Join Us

This is a rare opportunity to help build cutting edge tools from the ground up — not inherit them. You’ll be part of a small, ambitious team with the freedom to create, experiment and raise the bar for legal tech. You’ll work alongside smart, supportive people who move fast and care deeply about quality. If you’re motivated by ownership, pace and visible impact, you’ll feel at home here.

Who You Are

We are seeking a bright, analytical individual with a legal background to join our team as a Legal Prompt Engineer. This role is at the intersection of law and technology, where you’ll harness the power of LLMs to automate contract creation and generate legally sound document templates. If you’re excited by the challenge of blending legal expertise with cutting‑edge AI, we want to hear from you.

Department: Product

Reports to: Head of Product

Working Hours: Generally 9:00–17:30 GMT, with 1 hour’s lunch break

Compensation: Competitive, based on experience

Start Date: Flexible — we’d love you to join soon

Key Responsibilities

• Prompt Engineering & Development
  • Design and craft effective prompts to guide LLM outputs for generating legal documents and creating contract templates.
  • Develop and iterate on multiple prompt strategies to enhance accuracy and output/relevance in a contract context.
  • Ensure prompt structures are aligned with legal requirements and industry best practices.
  • Identify areas within the application that might benefit from the introduction of AI.
• Testing & Quality Assurance
  • Work with our AI‑engineers to execute rigorous testing protocols to validate that the AI‑generated content is outputting as expected.
  • Collect and analyse token data to assess prompt efficacy and output quality.
  • Continuously refine prompts based on testing outcomes to maintain high standards.
  • Apply your legal expertise to ensure generated documents adhere to legal best‑practice.
  • Interpret complex legal requirements and embed them into AI‑driven features within the Avvoka application.
  • Collaborate with the Customer Success team and our clients to verify that outputs meet real‑world legal needs.
• Legal Content Integration
  • Apply your legal expertise to ensure generated documents adhere to legal best‑practice.
  • Interpret complex legal requirements and embed them into AI‑driven features within the Avvoka application.
  • Collaborate with the Customer Success team and our clients to verify that outputs meet real‑world legal needs.
• Cross‑Functional Collaboration
  • Partner with Customer Success, Engineering, and Product teams to align AI outputs with client requirements.
  • Communicate technical and legal insights clearly to technical and non‑technical stakeholders.
  • Contribute to interdepartmental projects aimed at optimising template automation and document generation.
• Data Analysis & Iterative Improvement
  • Monitor trends in AI‑generated documents and identify areas for enhancement.
  • Utilise computational tools to track prompt performance and gather actionable insights.
  • Propose data‑driven recommendations to continuously improve prompt design and overall process efficiency.

Person Specification

It would be ideal that the candidate:

• Has a law degree or possesses legal experience, with a solid understanding of contract law and legal document standards.
• Is a qualified lawyer, who is also passionate about AI.
• Demonstrates strong analytical skills and attention to detail, with an aptitude for creative problem‑solving.
• Is capable of mastering new technologies and enjoys working at the intersection of law and innovation.
• Exhibits excellent written communication skills and the ability to collaborate effectively across teams.
• Is passionate about legal tech and driven to transform legal workflows through AI‑driven solutions.
• Has a strong demonstrable interest in commercially available LLMs.

It would be desirable that the candidate:

• Is very familiar with AI and prompting.
• Possesses basic programming or scripting skills (e.g., Python, SQL) to support technical tasks.
• Has experience in legal tech, contract automation, or document assembly platforms.
• Is comfortable in a fast‑paced, dynamic environment and thrives on continuous learning.

Our Hiring Process

• CV Review: Our People team reviews all applications carefully.
• Screening Call (15m): A quick virtual chat with our People team to learn more about you and answer any initial questions.
• Stage 1 – Assessment Interview (30–45m): A virtual assessment interview with the Hiring Manager focused on your experience and approach.
• Stage 2 – Senior Interview (for senior roles): An additional conversation with members of the leadership team.
• Meet the Team: Where possible, we’ll invite shortlisted candidates to visit our WeWork Waterloo office to meet the wider team.
• We aim to make an offer to the successful candidate within a month of application, but this will vary by role and seniority.

Benefits

• Flexible WFH allowance - flexible days in office based on operational requirements.
• Private health insurance through VitalityHealth (post‑probation), including discounted gym memberships.
• Access to WeWork amenities (coffee, community events, modern workspaces).
• Summer Fridays – finish early every other Friday in July and August.
• Monthly socials and quarterly team events.
• Annual learning and development budget.
• Home office IT allowance.
• 25 days’ annual leave plus public holidays.
• Company pension scheme.
• Right to request flexible working arrangements.
• A collaborative, transparent company culture with real opportunities for growth.

Equal Opportunities

We are an equal opportunity employer that celebrates diversity and inclusion. We welcome applications from individuals of all backgrounds, identities, and experiences - including those from underrepresented groups - and are happy to provide reasonable adjustments for candidates with disabilities during the recruitment process.