Senior Front End Engineer

🚀 Senior Frontend Engineer – Next.js / React

Location: Monument WeWork in London

Type: Full-Time

About Admanage.ai

We’re building the Cursor for ad management.

Admanage.ai helps companies launch ads 10x faster on Meta & TikTok. Created by top performance marketers who’ve managed over $50M+ in ad spend. Our mission? Level the playing field by giving every business access to enterprise-grade ad automation tools.

We make it easy to launch hundreds of ads in seconds, saving advertisers hours. And we’re building AI-powered tools to programmatically create, launch, and manage ads, which is where you come in.

We’re profitable, fast-moving, and backed by experience, not just ideas. We commit to GitHub multiple times a day and ship continuously.

Why This Role Rocks

This is a senior-level frontend role where you’ll design and deliver features that directly impact how the top advertisers launch and manage hundreds of thousands of ads per month. You’ll collaborate with the founding team (ex-Photoroom, ex-ZOE, ex-Nextdoor), shape our frontend architecture, and raise the bar for state management, testing, and performance.

You’re not here to maintain, you’re here to build a complex UI that’s robust and well-tested.

🔧 Tech Stack

Frontend: Next.js 14, React 18, TailwindCSS, Radix UI, Framer Motion

State Management: Zustand

Testing: Vitest

Backend (light exposure): Node.js, Prisma, MySQL

Infra: R2 Cloudfalre, AWS S3, Vercel

Auth: NextAuth.js

APIs: Facebook Marketing API, TikTok Ads API

What You’ll Do

Architect and scale the frontend for an app launching 500,000+ ads/month

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

Build production-grade testing frameworks (unit, integration, E2E) to support safe continuous deployment

Ship features end-to-end: idea → build → optimize for robust testing, speed and UX

You Might Be a Fit If You…

Have 5+ years building production React/Next.js apps

Are skilled at state management in large, complex apps

Believe testing is part of building, not an afterthought

Care about performance, UX, and clean design systems

Communicate clearly, move fast, and thrive in a startup culture

💡 Bonus Points For

Experience with ad APIs (Meta, TikTok, IG)

Prisma + MySQL experience

CI/CD pipeline knowledge (Vercel, GitHub Actions)

💰 Perks & Benefits

Thirdspace Gym membership

Competitive Salary

25 days holiday + bank holidays

WeWork Office in Monument

Team offsites (Past: Canada, South England)

Join Us If You Want To…

✅ Build alongside experienced engineers and founders

✅ Work with a modern stack and ship fast

✅ Solve hard UX and state management challenges in adtech

✅ Own what you build and shape our engineering culture

✅ Grow into a Lead role as the company scales

How to Apply

Send your GitHub, LinkedIn, and 2-3 lines on the hardest frontend problem you’ve solved lately. Bonus: links to anything you’ve built that makes you proud.

Interview Process

We start with a take home task where you’ll be asked to identify bugs in a sample github repo and indicate how you would fix it.