Senior Backend Engineer – AI-Powered Marketplace (Equity)

Company: Jack & Jill
Apply for the Senior Backend Engineer – AI-Powered Marketplace (Equity)
Location: London
Job Description:

Jack & Jill is looking for a Senior Backend Software Engineer to join their Growth squad in London, UK. The successful candidate will own the core ecommerce journey, working with cutting-edge AI technology to revolutionize the secondhand fashion market.

With a competitive salary of £100k–£140k plus equity, this role will involve designing backend systems for millions of items. Ideal applicants will have extensive experience in backend development and a knack for product engineering within fast-paced environments.

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Posted: July 7th, 2026