Senior Frontend Engineer (Competitive + Equity) at Fast-growing adtech platform

Jack & Jill/External ATS; Greater London; On-site; GBP 100,000 - 125,000; Full time

Job summary

A growing technology company in London is seeking a Senior Frontend Engineer to architect and scale the frontend for an ad platform managing over 450,000 ads monthly. This senior role is ideal for candidates with 5+ years of experience in React and Next.js, particularly those with expertise in Zustand and a passion for performance testing. Competitive compensation and equity options are offered in this fast-paced startup environment.

Qualifications

• 5+ years building production React/Next.js apps, with explicit Zustand expertise.
• Skilled at state management in large, complex, data-heavy applications.
• Believes testing is paramount and thrives in a fast-paced startup culture.

Responsibilities

• Architect and scale the frontend for an app launching 450,000+ ads/month.
• Implement robust state management to handle complex, async, and data-heavy workflows.
• Build production-grade testing frameworks to support safe continuous deployment.

Skills

React

Next.js

State management

Zustand

Testing frameworks

Job description

This is a job that Jill is helping to recruit for on behalf of one of our customers. To apply, speak to Jack.

Title: Senior Frontend Engineer (Competitive + Equity) at Fast-growing adtech platform

Salary: Competitive + Equity

Company Description: Fast-growing adtech platform

Job Description: Architect and scale the frontend for a platform managing hundreds of thousands of ads monthly. This senior role involves designing features that directly impact top advertisers, collaborating with experienced founders, and shaping the frontend architecture. You'll implement robust state management, build production-grade testing frameworks, and ship end-to-end features for a profitable, fast-moving adtech startup.

Location: London, UK

Why this role is remarkable:

• Design and deliver features directly impacting top advertisers on a high-scale platform.

• Join a profitable, well-funded adtech startup backed by experienced founders.

• Shape frontend architecture, raise the bar for state management, testing, and performance.

What you will do:

• Architect and scale the frontend for an app launching 450,000+ ads/month.

• Implement robust state management to handle complex, async, and data-heavy workflows.

• Build production-grade testing frameworks to support safe continuous deployment.

The ideal candidate:

• 5+ years building production React/Next.js apps, with explicit Zustand expertise.

• Skilled at state management in large, complex, data-heavy applications.

• Believes testing is paramount and thrives in a fast-paced startup culture.

How to Apply:

To apply for this job speak to Jack, our AI recruiter.

Step 1. Visit our website.

Step 2. Click 'Speak with Jack'.

Step 3. Login with your LinkedIn profile.

Step 4. Talk to Jack for 20 minutes so he can understand your experience and ambitions.

Step 5. If the hiring manager would like to meet you, Jack will make the introduction.