At a Glance
- Tasks: Build innovative AI tools using Claude to transform marketing workflows.
- Company: Join Grant Thornton, a forward-thinking firm driving positive change in the industry.
- Benefits: Flexible contracting options, community support, and opportunities for professional growth.
- Other info: Be part of a supportive community that values your unique contributions.
- Why this job: Make a real impact in AI while working on exciting projects that enhance your skills.
- Qualifications: Experience with Claude or similar LLMs and strong prompt engineering skills.
The predicted salary is between 60000 - 80000 € per year.
Who we are
At Grant Thornton we’re building something bold. We’re doing things differently - looking to the future, driving ambitious growth and pioneering positive change in our industry. Providing audit, tax and advisory services, we empower clients through strategic insight, curiosity, and genuine partnership. And we empower our people with real opportunity. Our journey from great to exceptional is well underway. With significant investment behind us and a clear strategy for growth, there’s real momentum.
Our Agile Talent Community (ATC) brings together experienced contract professionals who want choice without losing connection. You work where you add the most value, alongside teams who treat you as a partner rather than a placeholder.
Grant Thornton's Marketing function is delivering an ambitious AI transformation programme — building a suite of Claude-powered agents that automate and augment the full marketing workflow, from brief writing and content production through to campaign measurement and optimisation. We're looking for a hands-on AI builder to join the team and turn problem statements into working tools, fast.
If you’re an experienced AI prompt engineer / Agent builder, you'll take scoped agent briefs and build production-ready Claude-powered tools — designing prompt architecture, testing against real marketing scenarios, iterating based on feedback, and documenting what you've built so the team can maintain and extend it. You'll work across multiple agents simultaneously, managing your own prioritisation within a defined delivery roadmap. You’ll be given the opportunity to take on short- to medium-term projects that sharpen your expertise, stretch your thinking, and give you a different angle on familiar challenges - all without locking you into a single path. You can engage with us through your own limited company or on inside IR35 terms - whichever way gives you the freedom you’re looking for.
Skills we are looking for:
- Proven experience building with Claude or comparable LLMs — not theoretical, demonstrably shipped
- Strong prompt engineering skills: system prompts, chain-of-thought design, output structuring, guardrails and escalation logic
- Ability to read a problem statement and move to a working prototype without needing the brief to be perfect
- Experience working in marketing, content, or communications contexts is a strong advantage
- Comfortable working at pace in a delivery-focused environment with real stakeholder visibility
Why Consultants choose the ATC:
- Work that moves you forward: When a project fits your skills, we’ll get in touch, but you choose whether it’s right for you. That means working on engagements that genuinely build your portfolio and expand your expertise.
- The freedom of contracting without the hidden admin: You’re not left to navigate the freelance world alone. Our Agile Talent team helps you understand freelance regulation and connects you with people who broaden your thinking through our teams and clients.
- Community you can actually feel: Connection shouldn’t disappear just because you’re contracting. From market insights to wellbeing sessions to networking events, you’ll be part of a community designed to make the independent path less isolated and more impactful.
Our culture and values:
We have a culture where talented people thrive – where high performance is not just expected but enabled. It’s a culture built on clarity, curiosity, and care. One that challenges us to aim higher, where we’re encouraged to make the most of an abundance of resources to fuel our own development, and where we support each other to grow, learn, and succeed. Our open and accessible culture means you’ll interact with leaders who are interested in you and everything you bring to our firm. The things that set you apart, we value them. That’s why we give you the freedom to bring your whole self to work and pursue your passions inside and outside of work.
How to join:
We keep the process straightforward, because the real work happens once you’re here. Submit your CV and basic details through our online application. If there’s a match, a recruiter will reach out to discuss. Meet key stakeholders for a focused conversation. Complete your background checks, join the Agile Talent Community, and start exploring the opportunities we have to offer. If you need adjustments at any point in the process, please let us know during the application stage - we aim to make sure our roles are accessible to everyone.
AI prompt engineer/ Agent builder (Claude) employer: Grant Thornton UK
At Grant Thornton, we pride ourselves on being an exceptional employer that champions innovation and personal growth. Our Agile Talent Community fosters a collaborative environment where you can engage in meaningful projects that enhance your skills while enjoying the flexibility of contracting. With a culture rooted in clarity, curiosity, and care, we empower our people to thrive and make impactful contributions, all while being part of a supportive community that values your unique talents.
StudySmarter Expert Advice🤫
We think this is how you could land AI prompt engineer/ Agent builder (Claude)
✨Tip Number 1
Network like a pro! Connect with folks in the industry on LinkedIn or at events. Don’t just wait for opportunities to come to you; reach out and start conversations about your skills and interests.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your AI prompt engineering projects. This is your chance to demonstrate what you can do with Claude and similar LLMs, so make it shine!
✨Tip Number 3
Prepare for interviews by practising common questions related to AI and marketing. Think about how you can articulate your experience with prompt engineering and problem-solving in real-world scenarios.
✨Tip Number 4
Apply through our website! It’s the easiest way to get noticed. Plus, it shows you’re serious about joining our Agile Talent Community and being part of something bold at Grant Thornton.
We think you need these skills to ace AI prompt engineer/ Agent builder (Claude)
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that align with the AI prompt engineer role. Highlight your hands-on experience with Claude or similar LLMs, and don’t forget to showcase your prompt engineering skills!
Craft a Compelling Cover Letter:Use your cover letter to tell us why you’re the perfect fit for this role. Share specific examples of how you've turned problem statements into working prototypes and how you thrive in fast-paced environments.
Showcase Your Projects:If you’ve worked on relevant projects, include them in your application. We love seeing real-world applications of your skills, especially in marketing or content contexts. It helps us understand your approach and creativity!
Apply Through Our Website:We encourage you to submit your application through our website. It keeps things organised and ensures your details reach the right people quickly. Plus, it’s super straightforward – just follow the prompts!
How to prepare for a job interview at Grant Thornton UK
✨Know Your Claude Inside Out
Make sure you’re well-versed in Claude and similar LLMs. Brush up on your prompt engineering skills, especially system prompts and chain-of-thought design. Being able to discuss your hands-on experience with specific examples will show that you’re not just theoretical but ready to dive into practical applications.
✨Showcase Your Problem-Solving Skills
Prepare to demonstrate how you can take a vague problem statement and turn it into a working prototype. Think of past projects where you’ve done this and be ready to walk through your thought process. This will highlight your ability to work independently and efficiently, which is key for the role.
✨Familiarise Yourself with Marketing Contexts
Since the role involves working within marketing workflows, brush up on relevant marketing concepts and tools. Be prepared to discuss how your AI solutions can enhance content production and campaign optimisation. Showing that you understand the marketing landscape will set you apart from other candidates.
✨Embrace the Agile Mindset
Grant Thornton values agility, so be ready to talk about your experience in fast-paced environments. Share examples of how you’ve managed multiple projects simultaneously and prioritised tasks effectively. This will demonstrate that you can thrive in a delivery-focused setting and adapt quickly to changing needs.
