Senior Frontend Engineer at Evervault Limited

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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-m...