Work with us

Oxford Semantic Technologies (OST) is a rapidly growing deep tech start-up, spun out from the University of Oxford and backed by leading investors including Samsung Ventures and Oxford Science Enterprises. Our clients include some of the world’s largest companies.

We provide leading edge artificial intelligence software, capable of representing and using knowledge captured from human experts to draw new insights from big data. One of our founders is a winner of the BCS Lovelace Medal, awarded for significant contributions to advances in computer science.

Our users are applying this technology to help solve some of the biggest problems in business and society, such as assisting with medical diagnosis, combatting financial crime, autonomous vehicle safety, and the latest search and recommender systems.

We are looking for people who want to work in a fast pace and high growth start up environment, alongside some of the leading people in computer science, and share our vision to help every organisation harness the full power of their knowledge, expertise and data.

Why OST?

You’ll be working in a team producing some of the most advanced artificial intelligence software, based on cutting edge research from the University of Oxford.

Work alongside and learn from the leaders in the knowledge representation and reasoning field, knowledge engineering and computer science.

This is an opportunity to be involved at an early stage in our company’s history, to make a real impact with the work that you do, and not be just another cog in the machine.

What we offer

  • Competitive salary
  • Office located in Oxford City centre with flexible working
  • Competitive compensation and share options
  • Private healthcare with options for family cover
  • Generous personal pension contributions
  • Supportive colleagues with open feedback encouraged
  • Regular social events to enhance our one team ethos
  • OST is an equal opportunities employer and encourages diversity in our team
Oxford Semantic Technologies is an Oxford University Spinout, founded by three Professors.

OST Jobs

Account Executive

We are looking for an account executive that will nurture inbound marketing leads through to close, bringing the power of our leading AI technology to a wider audience.

Your impact

Reporting to the Chief Commercial Officer, you will use your strong relationship building and business acumen skills to nurture inbound marketing leads through to closing the deal, growing our customer base and net new revenue.  You’ll be a key member of a small sales and marketing team, with the opportunity to make a real difference, as we scale up our sales activities.

What you will work on

Your number one priority is to be responsible for potential customers that contact us, educating and guiding them through the customer journey as quickly as possible, through to winning the customer’s business.  You’ll often need to manage customers’ procurement processes.

You’ll work as part of a wider sales team that includes coordination with the CCO, sales engineer and marketing colleagues to ensure we respond efficiently and effectively to customer requirements, and present the clear value of our technology in solving the customer’s challenges.

We’ll also need you to pitch in with other sales activities, such as supporting existing customers to drive renewals and upselling, and drive advocacy for our technology.  You’ll be a key user of our CRM platform (HubSpot) to ensure we optimise the customer experience.

What we are looking for

For this role, we’re just looking for the right person. If you’ve already got experience and qualifications in technical software sales, then we’d love to hear from you. If you’ve got no experience but have business acumen and are a natural relationship builder, then we’d love to hear from you too.

  • Natural relationship builder with business acumen and a 2:1 or above degree (experience in consultative and/or technical software sales and winning business welcomed)
  • Able to understand and present technically complex solutions – supporting evidence would be welcome
  • Experience or strong awareness of customer services and delivering the best customer experiences to achieve advocacy
  • Highly motivated, organised, proactive and tenacious with a growth mindset, and an interest in technology and people
  • Willing to travel worldwide, work to targets and support other sales and marketing activities
  • Team player that frequently engages with colleagues to get the job done
  • Ready to take on an exciting challenge, as part of a small and rapidly growing business 
  • Must be entitled to work in the UK

How to apply

Please submit applications via LinkedIn.

Senior Frontend Developer (React)

We are currently hiring for a Senior Frontend Developer to help build a new application which will bring the power of our leading knowledge graph and semantic reasoning engine, RDFox, to a wider audience.

Your impact

Reporting to the Chief Technology Officer, you will use your knowledge of best practices in modern frontend development to drive the development of the new interface forward, in close collaboration with the Lead UX Designer and the existing development team.

You should have strong ideas about how to establish high-quality code bases for state-of-the-art frontend applications and the ability to communicate the value behind each practice to your developer colleagues. With these skills, you will help set the development of the new application on a course for success.

What you will work on

Your number one priority will be to ensure that the new interface is developed to the required standard as efficiently as possible. You will achieve this through your own contributions, as well as through mentorship of developers with less frontend experience. You will be empowered to identify modern development patterns that improve efficiency and help establish a high build quality.

What we are looking for

  • Five to ten years’ experience working on front-end, web development with a minimum of two years’ in a lead developer role.
  • At least two years’ experience with React; knowledge of Next.js and Vercel are highly desirable.
  • Experience of working with design systems; experience with Figma and Storybook would be beneficial.
  • Knowledge of a wide range of browser APIs including state management.
  • Experience of developing new web interfaces from scratch.
  • Knowledge of common browser based security risks and how to mitigate them.
  • Experience of mentoring junior developers in all of the above.
  • Availability for hybrid work with at least three days a week at our office in Central Oxford.

How to apply

Please submit applications via LinkedIn.


Oxford Semantic Technologies is a spin out of the University of Oxford and is backed by leading investors including:
Oxford Science Enterprises
Samsung Venture Investment
Oxford University Innovation