OnBuy

OnBuy is an online marketplace that rewards loyalty.

51-100 employees
Founded 2016
$48.3M series a
Marketplace
Private Company

Open Positions1

United KingdomFull-TimeE-commercePosted
  • Build, scale, and evolve OnBuy’s core commerce platform across both front-end and back-end systems
  • Own engineering delivery end-to-end; from customer-facing experiences to underlying services and data systems
  • Operate within a cross-functional team and be accountable for shipping high-quality, scalable solutions that directly impact GMV, seller performance, and customer experience
  • Design, build, and maintain full-stack solutions across UI, APIs, and backend systems
  • Translate product requirements, designs, and wireframes into scalable, production-ready systems
  • Own features from concept → development → testing → release → monitoring
  • Build responsive, high-performance user interfaces using modern JavaScript frameworks
  • Translate UI/UX designs into clean, maintainable code
  • Optimise applications for speed, scalability, and usability
  • Design and develop scalable services and APIs
  • Work across monolith and microservices architecture (Laravel / PHP services)
  • Maintain and evolve legacy systems while building modern, scalable architecture
  • Own quality to production — testing is embedded, not a phase
  • Write and maintain automated tests (unit, integration, end-to-end)
  • Participate in and lead code reviews to ensure high engineering standards
  • Debug, troubleshoot, and resolve issues across the stack
  • Optimise systems for performance, reliability, and scale
  • Work with large-scale data systems (MySQL, NoSQL, search platforms)
  • Identify bottlenecks and proactively improve system efficiency
  • Work in cross-functional teams with Product, Design, QA, and other Engineers
  • Mentor and support less experienced engineers
  • Communicate technical concepts clearly to non-technical stakeholders
DockerPHPGCP+11 more

About OnBuy

OnBuy is a rapidly growing eCommerce company committed to providing a transparent and fair trading platform for sellers and an easy shopping experience for buyers. Unlike other marketplaces, OnBuy does not compete with its sellers, nor does it sell its own products or maintain warehouses, allowing for a focus on enhancing customer experience and building trust.

Tech Stack

widgetsmobile

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