At a Glance
- Tasks: Build and scale OnBuy’s core commerce platform across front-end and back-end systems.
- Company: Join one of the UK's fastest-growing tech companies on a mission to excel.
- Benefits: Competitive pay, flexible working, and opportunities for professional growth.
- Other info: Be part of a dynamic team focused on delivering high-quality, scalable solutions.
- Why this job: Make a real impact by owning engineering delivery from concept to release.
- Qualifications: Experience in full-stack development and a passion for innovative solutions.
The predicted salary is between 60000 - 80000 £ per year.
Who are On Buy?
On Buy are an online marketplace who are on a mission of being the best choice for every customer, everywhere.
We have recently been named one of the UK's fastest-growing tech companies in the Sunday Times 100 Tech list.
All achievements we are very proud of, but we don't let that go to our head.
We are all laser focused on our mission and understand the huge joint effort ahead of us needed to succeed.
Working at On
Buy: This is a critical role responsible for building, scaling, and evolving On Buy’s core commerce platform across both front‑end and back‑end systems.
As a Senior Full Stack Engineer, you will own engineering delivery end‑to‑end; from customer‑facing experiences to underlying services and data systems.
You will operate within a cross‑functional team and be accountable for shipping high‑quality, scalable solutions that directly impact GMV, seller performance, and customer experience.
This role moves beyond “front‑end vs back‑end” you are an Engineer responsible for outcomes, not layers.
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 Java Script frameworks Translate UI/UX designs into clean, maintainable code Optimise applications for speed, scalability, and usability Back‑End
