We Optimise Your Tech Stack
Rather than simply purchasing industry-leading technology and struggling with integration or adoption, we focus on ensuring your processes run as efficiently as possible, using only the resources you truly need. Whether you lack time or expertise, RE:STACK is here to help you maximise your ROI and get your business back on track.






Our Vision
We help recruitment agencies unlock the full potential of Bullhorn to drive efficiency and increase profits. Through impactful, revenue-boosting training and configuration, we inspire teams to work smarter, aim higher, and achieve lasting success.
Our Values
Problem Solving
We provide customised, data-driven solutions that address specific challenges, leveraging technology to enhance recruitment operations and deliver sustainable growth. We believe that there is always a solution.
Passion
We bring enthusiasm and energy to everything we do, inspiring clients, colleagues and the wider industry. Our passion for innovation, learning, and problem-solving drives us to go above and beyond, delivering exceptional value and lasting success.
Delivering Impactful Results
We are dedicated to achieving measurable outcomes that drive success for our clients, ensuring their recruitment processes and technologies are efficient and profitable.





Meet the Team
Founder & CEO
Holly Langley

I began my career in recruitment operations, spending seven years developing a deep understanding of Bullhorn. During that time, I realised my real passion was helping recruitment businesses get more value from their CRM and automation.
Since launching in 2022, I’ve worked with agencies facing the same challenges: limited marketing support and a lack of Bullhorn expertise to build effective workflows.
RE:STACK brings together specialists in recruitment data, marketing, and operations to deliver practical workflows and templates that help agencies win more clients, engage contractors, improve productivity, and unlock the full potential of their Bullhorn automation.
Bullhorn & Operations Specialist
Alana Carroll

With over 15 years of experience in recruitment operations, I’ve worked with organisations ranging from specialist agencies to global multinational firms.
My focus has been on data protection, analytics, and ensuring technology delivers measurable ROI while maintaining strong compliance standards.
I’ve built extensive expertise in Bullhorn, developing a deep understanding of how to optimise the platform for different recruitment environments.
What drives me most is helping teams get more from their technology, creating smarter, more efficient ways of working that deliver real operational impact.
Technical Consultant
Jamie Rich

I started my career at cube19, a fast-growing recruitment analytics start-up, through to its acquisition by Bullhorn. I then spent several years at Bullhorn as a Senior Technical Consultant, managing end-to-end Analytics rollouts for enterprise clients, working closely with senior stakeholders to turn their needs into a working, adopted platform.
I later completed an MSc in Data Science while working as an AI & Automation Analyst, building LLM-powered workflows and a data platform from scratch.
That mix of Bullhorn expertise and technical skills is what I bring to RE:STACK. Finding the smoothest path to getting clients live and seeing real value.
Bullhorn, Automation & AI Specialist
Nadia Mullins-Hills

With over 18 years in recruitment and the past decade focused on operations and technology, I’m passionate about helping agencies unlock the full potential of the systems they already have.
From CRM implementations to process optimisation and automation, I work at the intersection of recruiters, operations, and technology.
My approach is hands-on and practical, focusing on scalable solutions that improve performance.
Ultimately, my goal is to help recruiters spend less time on admin and more time building relationships by making better use of the tools they already have.
PA to the Directors
Abby Turner

I've spent my career building the operational backbone that allows businesses to thrive. From Executive Assistant to Account Manager to Business Manager, I've learned that every successful growth story starts with strong foundations. Robust processes, clear systems, and organised teams that can scale.
Working closely with founders and leadership teams across recruitment has reinforced this: the agencies that win are the ones with bulletproof operations behind the scenes.
At RE:STACK, I help build and refine those systems, creating the structure and efficiency that frees teams to focus on what they do best, building relationships and closing deals.
Sales & Partnerships Director
Chris Little

I began my career in recruitment technology at cube19, joining the business at inception and helping scale its commercial function through to its acquisition by Bullhorn. After the acquisition, I joined Bullhorn as Global Analytics Sales & Strategy Specialist, leading Bullhorn Analytics worldwide and driving growth across a global client base.
Having seen first-hand how powerful recruitment technology can be when fully adopted, I joined RE:STACK as Sales & Partnership Director. My focus is helping agencies unlock the full potential of their tech stack, turning Bullhorn and automation into measurable ROI and sustainable performance.
Bullhorn & Operations Specialist
Sam Smith

I’ve spent over 15 years working in office and operations roles across industries including construction, facilities management, manufacturing, and recruitment.
My background is primarily in office management, with a long-standing interest in automation and improving operational efficiency. After more than four years in recruitment, I’ve gained a strong understanding of both recruiter and operations challenges.
I’m passionate about showing how AI and technology can reduce manual work, minimise human error, and help teams work more efficiently by making the most of what automation can offer.
Bullhorn Specialist
Callum O'Rourke

I help recruitment agencies get more from Bullhorn by combining CRM optimisation, automation and analytics to improve efficiency, increase adoption and drive measurable business outcomes. Over the past seven years, I've delivered transformation projects across the UK, US, Europe and MENA, from Bullhorn implementations to automation strategy and process redesign. I take a holistic approach, aligning technology, people and process to solve operational challenges and support business growth.
Turning complex problems into practical solutions is what I enjoy most, helping agencies unlock the full potential of their technology so recruiters spend less time on admin and more time delivering value to their clients.
Head of Technology & Email Deliverability
Ben Fielding

I help businesses get the most out of their technology, specialising in email delivery, security, and infrastructure.
Working with recruitment agencies and service providers has given me a strong understanding of the communication and compliance challenges agencies face.
At RE:STACK, I focus on ensuring customers maintain strong email deliverability, from authentication and sending practices to diagnosing issues when messages don’t land where they should. My goal is to build reliable, scalable systems so recruiters can focus on relationships, not technology problems.
Ready to increase your Bullhorn ROI?
Most agencies are getting a fraction of what Bullhorn can deliver.
Not because the technology falls short, because optimising it takes specialist knowledge, consistent focus, and a team that genuinely understands both recruitment and the platform.
That's precisely what RE:STACK provides. No generalists, no guesswork. Just deep Bullhorn expertise, applied directly to your business, your processes, and your goals.
If you're ready to turn Bullhorn from a cost into a competitive advantage, let's talk.