We’re looking for a Senior Solutions Engineer to bridge the gap between our development team and our brand partners. This hybrid role combines hands-on technical expertise with client-facing responsibilities to ensure smooth onboarding, successful integrations, and a best-in-class customer experience. You will act as a trusted technical advisor to our retail partners, owning the pre-sales technical process, managing onboarding, and translating complex brand requirements into scalable solutions. Your developer background will enable you to dive deep into our platform and integrations, while your excellent communication skills will help you confidently present technical information to non-engineering stakeholders. If you enjoy solving complex technical problems and thrive in presenting and collaborating with diverse stakeholders, this role offers a unique chance to drive impact both inside the company and with our brand partners. Who We Are • We’re a small, ambitious product team of experienced technologists. • We care deeply about the products we build and take full ownership of them. • We experiment regularly and iterate quickly. • We build and evolve new products that make a difference to our customers, our team, and the business. • We care about scale. Our business is growing rapidly and we use modern, best-practice approaches to stay ahead. • We believe in collaborative design and architecture, and empower each other to lead. • We’re embracing AI development tools and look for measurable gains from using them. If we achieve 2x speed regularly, we consider that a success. Who We’re Looking For • Key Skills: Typescript, Python, React & AWS • Experienced software engineer or developer with a solid understanding of backend and frontend technologies, APIs, and integration patterns • Proven track record in a client-facing technical role such as solutions engineer, pre-sales engineer, technical consultant, or developer advocate • Comfortable communicating complex technical concepts clearly and confidently to technical and non-technical audiences. • Experience working with e-commerce platforms and integrations, ideally including Shopify, BigCommerce, or similar • Strong problem solver with the ability to independently manage projects from concept through delivery • Enthusiastic about using AI and automation tools to improve workflows and efficiency • Familiar with A/B testing, analytics, and growth-focused product development • AWS experience is a plus • Startup or scale-up experience is highly desirable What We Offer • Competitive salary • 32 days holiday (take public holidays whenever you like) with a 3-day carryover policy • £600 annual wellbeing allowance • MacBook Pro • Hybrid working • Regular team socials Interview Process • 15-minute intro phone call – we’ll get to know you and tell you more about Harper and the role. • 30-minute video call culture and tech fit interview – we’ll dive into your experience and motivations • 60-90-minute in-person tech scenario interview – we’ll give you a scenario and ask you questions about this • Offer 🎉