Skip to main content

We are Calvium

We accomplish incredible feats through working together. Technical skills, creativity, considered insight and problem solving combine to create results that are not only exceptional in their functionality – but visually, too. Complex ideas and requirements translate into products that run smoothly and efficiently, and ensure that the user experience is intuitive and engaging.

Senior UI Designer

Saliha Ahmed

Saliha is a designer with a background in digital, print, and packaging, with a particular focus on interface design. Passionate about creating inclusive digital experiences, Saliha explores how technology and design can bridge the gap between the digital and physical worlds, ensuring products are both intuitive and usable by everyone. Saliha earned a First Class Honours degree in Graphic Communication, bringing expertise in visual storytelling, user interface design, and accessible design principles to every project.

Chief Operating Officer

Róisín Alvy

Róisin (Ró) Alvy is Calvium’s Chief Operating Officer, bringing over 13 years of experience in developing data-driven digital products.A certified Scrum Master and UX specialist, Ró excels at transforming early-stage prototypes into accessible, secure and robust solutions across varied and highly regulated sectors.Since joining in 2018, she has focused on delivering real-world impact through responsible innovation. Passionate about environmental sustainability, Ró was instrumental in securing Calvium’s B Corp certification in 2025, reflecting her dedication to purpose-led technology.

Mariia
Junior Project Manager

Mariia Balenko

Mariia brings skills from her legal experience in Ukraine to projects across Calvium, contributing organisation, testing, data, content and research. She loves the variety of work, and relishes learning and building on new skills, including UX, UI, coding and languages. Outside work she volunteers for With Love to Ukraine, helps with interpretation for Ukrainians at a Bristol care home, and supports Ukrainian children in local primary schools.

Jules
Technical Manager

Julius Bangert

Julius has a broad background in design and development. He enjoys taking an interdisciplinary approach to creating engaging and compelling interactive experiences utilising new technologies and best practices. He takes particular joy in problem solving and coming up with innovative ideas.

Matty
Senior Project Manager

Matty Bateman

Matty is a certified Scrum Master and senior project manager with over ten years experience delivering software. Coming from the corporate space, working with large enterprise clients such as McDonald’s, Disney and Mott MacDonald; Matt transitioned into third sector three years ago. Working with Not For Profit and charity firms such as Chatham House, the British Medical Association and the UN Capital Development Fund reflects Matty’s passion for equality, accessibility and social value.

Tim
Head of New Business

Timothy Bull

Timothy Bull (Tim) is Head of New Business at Calvium, where he helps purpose-led organisations turn ambitious ideas into meaningful digital outcomes. With experience across Gartner and international SaaS businesses, Tim brings a thoughtful, evidence-led approach to growing into new markets. He enjoys working closely with teams and clients across research, design and delivery, and is particularly interested in how human-centred technology can support impact, accessibility and trust.

Technical Delivery Manager

Pablo Carrillo

Pablo Carrillo is our Technical Delivery Manager and in house iOS Specialist and has developed apps for clients such as Yodel and Fatbrain. Working in mobile development for over seven years, Pablo is also skilled in areas of projects, processes and planning. He holds a 5 year degree in Telecommunication Engineering, focused on telematics, from the Universidad de Sevilla in Spain. He has a special interest in mobile communications, networking and devices.

Chris C
Developer

Chris Clarke

Chris is a Developer with rich experience of building user-friendly data interface tools. Since his degree in software engineering, he has played key roles in teams building data-driven websites and SaaS applications within global data analysis corporations. At Calvium, Chris focusses on building cloud based web services, utilising a broad range of frameworks and technologies.
Ben
CTO, Founder

Ben Clayton

Ben Clayton is Calvium’s founding Technical Director. He specialises in system architecture, tools and mobile technologies. Ben has deep expertise in developing software platforms as well as native mobile apps, being highly skilled in both iOS and Android development. Ben is able to make apps communicate effectively with almost anything, from apps that control showers and set lighting controls to the more familiar API interfaces and back-end systems.

Andre
Developer

André Emiliano

André is a Developer specialising in iOS development. He contributed to a number of iOS apps for big UK retailers before joining Calvium. André holds a BSc in Computer Science and a MSc in Software Development. Originally from Portugal, Andre has a keen interest in problem solving, user experience and new technologies.

Marisa
Marketing Coordinator

Marisa Harlington

Marisa applies her extensive experience of producing communications materials for SME and third sector organisations to support Calvium’s external communications. She builds the company’s visibility and brand; ensuring the business values are shared clearly through regular multi-channel communications. Between work and family commitments, she volunteers as comms lead for a CIC, and marshalls at local Park Runs.

Harry
Developer

Harry Hartley

Harry is a Lead Full Stack Developer with over ten years of experience in software engineering. Graduating in Computer Science from the University of Bath, Harry has worked on projects across a diverse range of sectors from home automation systems, to financial trackers, holiday bookings, and even flight safety systems. As well as his broad experience as a software consultant in various disciplines, Harry brings specialist NextJS/Typescript skills to Calvium.

Jo M
Director Of Digital Innovation & Research

Jo Morrison

Jo works at the intersection of design, research and business. Focussing on digital innovation, she creates and delivers successful strategies and projects to maximise impact, accelerate growth and create rich customer experiences across a range of sectors – including property, the creative and cultural industries and education. Discovering the opportunities and value that bespoke digital placemaking affords clients involved in large scale urban developments is a core area of Jo’s work – with the aim of creating more pleasurable, sustainable and citizen-centred future cities.

Alternative Fuels Specialist

Jon Parsons

Jon is an experienced engineer, systems designer and innovation manager with a wealth of knowledge from his work at Rolls-Royce. He was most recently Emerging Capabilities manager, with previous roles including Systems Design Integration & Configuration (SDI&C) manager; Future Programmes SDI manager, and Systems Design Integration & Configuration (SDI&C) manager. He has led many methods improvement initiatives such as rapid capability deployment, Emergent Design, High Performance Computing and Digital Twins. Jon is a fellow of the Institute of Mechanical Engineers, holds a degree in Aeronautical Engineering Design and a Masters in Design Systems in Production.

Vitor
Developer

Vitor Alves Quintãos

Vitor is a developer with a history in native Android engineering. After getting his bachelor’s degree in Computer Science, he published his own Android apps and was part of a design and development start-up in Portugal, before joining us here at Calvium. Vitor now works primarily with React Native to engineer both front- and back-end.

Jo R
CEO, Founder

Jo Reid

Jo brings her consultancy expertise and vast mobile design experience to the heart of the executive team. Holding an MBA and BSc in Computer Science, Jo was formerly a senior researcher at Hewlett-Packard Laboratories. As well as captaining the Calvium ship, Jo offers our clients expertise in mobile experience design, particularly in regards to location and context aware applications.

Finance Manager

Amy Riddell

With three decades of experience in the finance industry, Amy is a trusted leader and expert in financial management. She has worked with businesses of varying sizes, from startups to large corporations, developing financial systems and strategies that ensure sustainability, profitability, and long-term success. Amy has continually demonstrated an ability to navigate complex financial landscapes, make data-driven decisions, and lead teams toward operational excellence, demonstrating not only technical skills but also a deep understanding of the broader business environment.

Fernando
Developer

Fernando Sánchez

Fernando studied Computer Science at the University of Seville, before starting his career as a full-stack developer. He’s spent time living and working in California, Singapore, Finland and remotely from several countries. Since 2015, he’s specialised in iOS and Android engineering and now lives in Seville, Spain.

Join the team

Check out our current job openings and discover exciting opportunities to grow your career while working with a team that values creativity, collaboration, and impact.