Pre Sales Engineer in London

Our Perks

• £35,000 - £40,000 base pa (dependent on experience)
• Monthly Health & Wellness budget, increasing with length of service
• Annual Learning and Development budget, increasing with length of service
• Flexible working in a choice-first environment - we trust the way you want to work
• Work From Home Allowance
• 25 Holiday Days + your local bank holidays, plus an extra day for every year of service
• Your birthday off
• Enhanced Family Leave (UK Only), Fertility Leave, and Neonatal Leave
• Optional Healthcare Plan
• Life & income protection (Location dependent)
• Employee Assistance Programme (UK Only)
• The opportunity to share in the company's success through options
• If you're in London, a dog-friendly office with great classes, events, and a rooftop terrace

The Role

Our mission is to help large successful brands like Uber, Amazon, Wise, HelloFresh (and more!) put their customers at the centre of everything they do. Using best-in-class tech in a fast-developing AI space, our Customer Experience Intelligence platform continuously analyses explicit and implicit feedback to enable our clients to identify what they should do next.

We're now looking for a talented Pre Sales Engineer to join the team!

What You'll Be Doing

• The Pre-Sales Engineer role is primarily focused on the technical delivery of Proofs of Value (PoVs). Success is measured by the ability to execute reliable, credible PoVs using real customer data, producing outputs that can be confidently used in live sales cycles to support deal progression and conversion.
• The role initially involves limited direct customer exposure. Over time, progression comes through demonstrated technical judgement, curiosity, and a growing understanding of how high-quality technical execution drives commercial outcomes.
• Own and deliver the technical execution of Proofs of Value (PoVs) to support the Chattermill sales cycle, from initial setup through to delivery.
• Prepare, ingest, and transform customer data for PoVs, including data acquisition, ETL processes, data modelling, and validation.
• Build and maintain PoV outputs such as dashboards, analyses, and reports, aligned to agreed scope, success criteria, and customer use cases.
• Validate data quality, coverage, and assumptions to ensure PoV outputs are reliable, defensible, and fit for use in a commercial sales context.
• Clearly document PoV setup, data limitations, and technical decisions to support internal handover, reuse, and consistency.
• Collaborate closely with DataOps, MLOps, Sales, and Product teams to deliver PoVs efficiently and to an agreed quality standard.
• Maintain demo and PoV environments in line with product releases, platform capabilities, and best practices.
• As you grow in the Pre-Sales Engineer role, you will gradually contribute to customer facing activities such as technical Q&A, PoV presentations, and solution scoping, supported by training and coaching.
• Develop proactive technical judgement, anticipating data quality or coverage issues that could impact prospect confidence.
• Connect technical decisions to customer use cases and intended outcomes.
• Show curiosity beyond execution, understanding why data matters and how insights will be interpreted.
• Contribute to shaping PoV scope around high-value use cases in partnership with Sales and Solutions Consultants.

What You'll Need

• Experience translating business requirements and use cases into practical technical or analytical solutions.
• Coding ability in Python, with familiarity using modern AI-assisted development tools (e.g. Cursor, Claude).
• Proven experience building and running ETL workflows across varied data sources (CSV, JSON, APIs), with a solid grasp of data quality, validation, and error handling.
• Experience supporting trials, pilots, or Proofs of Concept, ideally in a commercial or pre-sales context.
• Comfortable working with imperfect or incomplete data, and clearly communicating assumptions, limitations, and trade offs.
• Strong analytical and problem-solving mindset, with the ability to diagnose customer challenges and deliver clear technical solutions.
• Curiosity about how technical architecture, data flows, and AI-driven insights connect to buying decisions and measurable customer value.
• Excellent communication and presentation skills, able to explain technical concepts to non-technical and senior stakeholders.

It Would Be a Bonus If You

• Experience working with cloud-based SaaS products; exposure to modern AI tools and platforms.
• Exposure to B2C industries such as e-commerce, subscription services, or consumer platforms.

Our Hiring Process

• Let's introduce ourselves – you'll complete an introductory asynchronous interview - we'd love to learn more about you, your ambitions, and what you're looking for in your next step.
• Get to know your would-be manager – you'll have a call with Tom Whitney, our VP Solutions Consulting, to learn more about the role and show off your experience.
• Show us how you work – you'll complete a short take home assignment and demo for the team.
• Get to know your would-be team – You'll meet people you'll be working closely with from the Commercial Team.
• How our values and your career goals align – you'll have a call with our cofounder to learn more about life at Chattermill and ensure we're the right place for your next stage of growth.

Our Values

• We are obsessed with experience – We take our mission to rid the world of bad Customer Experience seriously, and we practice what we preach.
• We believe in the power of trust – Whether it's with each other, our customers, partners, or other stakeholders, we always communicate with openness and trust.
• We act as responsible owners – Whether it's about the company, a team, a project, or a task, having the freedom to make decisions in our area of responsibility is a crucial driver for us.
• We share a passion for growth & progress – On every level, we're motivated by taking on new challenges – even if they seem out of reach. We recognise that we are learning machines and we always seek to action feedback and improve collectively.
• We set our ambitions high but stay humble – We've come together to build a product and a category that's never been seen before. While we're an ambitious bunch with lofty goals, we don't approach this goal carelessly.
• We believe the right team is the key to success – At Chattermill we've learned that all our important achievements have been the result of the right people collaborating together – that's why we need you to apply today!

Diversity & Inclusion

We want to enable exceptional experiences for everyone, and to achieve this we need everyone's voice in our team. We are on a mission to bring more diversity into the business and to give everyone (from all backgrounds and abilities) a chance to join us, even if they may not fit all of the requirements set out in this job spec. We realise that some may be hesitant to apply for a role when they don't meet 100% of the listed requirements – we believe in potential and will happily consider all applications based on the skills and experience you have, we'd love to be part of your growth and we encourage you to apply!