Job Description

The Role

End-to-End Engineering Ownership

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

Front-End Excellence

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

Back-End & Platform Engineering

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

Quality & Engineering Standards

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

Performance & Scalability

Optimise systems for performance, reliability, and scale
Work with large-scale data systems (MySQL, NoSQL, search platforms)
Identify bottlenecks and proactively improve system efficiency

Collaboration & Leadership

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

Requirements

Essential

Strong full stack engineering experience, owning end-to-end delivery
Proven backend expertise in PHP (Laravel)
Strong JavaScript (ES6+) skills with modern frameworks (React/Vue/Angular)
Experience designing and building RESTful APIs and scalable systems
Experience with MySQL and NoSQL databases (e.g. Couchbase, MongoDB)
Strong understanding of system architecture and microservices
Experience with event-driven systems (e.g. RabbitMQ, Pub/Sub) and cloud environments (GCP)
Familiarity with Docker and CI/CD pipelines
Strong engineering practices: testing, code quality, and production ownership

Desirable

Experience in eCommerce or marketplace platforms
Cloud experience (GCP)
Experience with NoSQL (e.g. Couchbase) and Search platforms (e.g. Constructor & Solr)
Experience working in microservices architecture

Benefits

Work Arrangement: UK remote role; must be based in the UK with full right to work

Compensation: £450-£600 per day, DOE. Contract until 31st August 2026. Please confirm your outside IR35 day rate upon application.

About the Company

Who are OnCommerce?

OnCommerce is a global selling platform that powers a growing network of retail channels, including:

OnBuy - The only marketplace in the world to give customers instant Cashback on everything
easyShop - An all-new marketplace created in collaboration with the easy® family of brands
Comet - The iconic UK tech brand making its return later this year

OnCommerce is growing fast, launching new brands and scaling to power the future of ecommerce.

Be Part of the Story

OnCommerce is constantly evolving. Everyone here plays a hands-on role in shaping what comes next, building brands that make an impact across global markets. There's no red tape or rigid corporate structure; just smart people taking ownership and figuring things out as we build something big together. The pace is fast, priorities shift, things aren't always perfectly set up, and you'll often need to get stuck in and solve problems. But if you thrive in that kind of environment, you'll have real influence, real ownership, and the chance to grow with a rapidly scaling business.

About OnBuy

OnBuy have quickly become recognised as being one of the fastest-growing eCommerce companies in the world. We are on a mission to provide 'the most transparent and fair-trading platform' for sellers, and a place where buyers can easily find what they need, every day. What sets OnBuy apart from other marketplaces is that we don't compete with our sellers, we don't sell our own products and we don't have our own warehouses, which creates a more efficient business model that allows us to focus on the customer experience and helps us to reinforce trust in our sellers, and the platform itself.

Similar Jobs