Developer‑First Payments Platform API Engineer

Jack & Jill

Full-time IT & Technology
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Location
london, england, United-Kingdom
Posted
May 31, 2026

Job Description

Company Description

VC-backed fintech infrastructure startup

Location

London, UK

Job Description

You will join a high-performance team building core payments infrastructure and data security primitives. This role involves owning the entire product lifecycle from customer discovery to shipping production-grade APIs. You will work across the stack to develop solutions for tokenization, network integrations, and 3D Secure for major global merchants.

Why this role is remarkable

  • Work on mission‑critical infrastructure where security and precision are paramount for global transaction volume.
  • Backed by top‑tier VCs with a lean team of approximately 25 people, ensuring high impact and ownership.
  • Opportunity to shape the product roadmap and technical culture of a rapidly scaling developer‑first company.

What you will do

  • Design and build developer‑facing APIs and full‑s...