Senior Frontend Engineer (£70k-£150k + Equity) at Evervault Limited

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

She will pick the best candidates from Jack's network

The next step is to speak to Jack.

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.

Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website.
Step 2. Click 'Talk to Jack'.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.