Job Title
Senior Frontend Engineer
Salary
£70k-£150k + Equity
Company Description
Evervault Limited – VC-backed fintech infrastructure for encryption and data security
Job Description
You will join the Cards team to build core payments infrastructure that tokenizes and secures sensitive data at scale. As a Product Engineer, you will own the entire lifecycle of card security primitives, designing developer-facing APIs and shipping full-stack solutions that power transaction volume for industry leaders like Ramp and Rippling.
Location
London, UK
Why this role is remarkable
* Solve complex infrastructure challenges involving card network integrations, 3D Secure, and confidential computing at a high-growth startup processing $5B+ annually.
* Join an elite ~25-person team backed by tier-one investors including Sequoia Capital, Index Ventures, Kleiner Perkins, and Ribbit Capital.
* Work in a developer-first environment where you have a direct line to product direction and ship code that serves the internet's biggest merchants.
What you will do
* Design and build robust, developer-facing APIs and UI components for secure card data tokenization and orchestration.
* Work directly with customers to understand their payment stacks, debug complex integrations, and shape the product roadmap based on real-world needs.
* Own features end-to-end, moving across the stack from backend services in Rust to frontend SDKs and documentation in TypeScript.
The ideal candidate
* Significant experience shipping production‑grade products, with 3–10+ years in software engineering and a strong foundation in CS, math, or physics.
* Deeply product‑minded with a relentless focus on developer experience and the ability to articulate technical decisions clearly to customers.
* Strong technical taste and a desire to go deep into payments domain expertise, including card networks, encryption, and distributed infrastructure.
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