Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Own the design system and ship pixel-perfect UI in React.
- Company: Join an innovative AI-native integration company focused on seamless SaaS experiences.
- Benefits: Competitive salary, performance bonuses, lunch budget, and home office setup.
- Other info: Collaborative team environment with opportunities for growth and innovation.
- Why this job: Be the authority on UX and make a real impact on product quality.
- Qualifications: 4+ years of front-end engineering experience with a strong portfolio.
The predicted salary is between 80000 - 100000 ÂŁ per year.
The company is an AI‑native integration layer for SaaS products and agents: unified APIs, MCP‑friendly tooling and A2A (agent‑to‑app and app‑to‑app) bridges so builders can wire their products into hundreds of third‑party tools without hand‑rolling every integration. It handles managed auth, real‑time observability and connector sprawl so product teams can focus on great agent experiences instead of glue code. Your job is to make the surface they see feel as well‑engineered as the plumbing underneath.
Why this role exists: The product experience is the brand. This is the first dedicated UX Engineer role — you’ll be the in‑house authority on taste, polish and performance. You won’t be one of many contributors to the front end; you’ll set the standard everyone else works to: the component library, the design system, the micro‑frontend architecture, and the AI rules and tooling that let the rest of the team move fast without making a mess.
What you’ll actually do:
- Own the design system – define the visual language, build reusable primitives, and maintain the libraries that power every interface.
- Ship pixel‑perfect UI in React, with real ownership of theming, performance and motion.
- Make performance a feature – instrument Core Web Vitals, set bundle budgets, optimise hydration patterns and chase performance where it actually matters.
- Be the voice of quality – host design critiques, push back on product design when it matters, and be the person who asks “what happens in this edge case?”.
- Prototype and validate – turn product ideas into interactive proofs‑of‑concept that help PMs and designers converge on the right answer fast.
- Lift the whole team – create AI‑powered tooling and internal rules so every engineer can contribute to the front end at your level.
The split is roughly 70–80% front end, 20–30% back end (Node, React‑router, SvelteKit) — enough to remove performance bottlenecks without being a full‑stack role.
Who you’ll work with: You’ll report directly to the technical leadership and work most closely with the Product Manager and Product Designer day‑to‑day. The team is fast, flat and product‑focused: engineers own their features end‑to‑end and interact with product directly, so your decisions will show up quickly in what customers use.
Must‑haves:
- 4+ years professional front‑end engineering, with a portfolio that shows you care about the details.
- React & TypeScript at production scale (hooks, suspense, server components).
- A strong UX sense for B2B SaaS flows — you’ve lived through auth flows, billing pages and dashboards, and you know where the traps are.
Nice to have:
- Svelte, Web Components or other framework experimentation.
- Experience with auth flows (OAuth2, OpenID Connect) and secure front‑end patterns.
- Prior work on B2B developer tools or dashboards at the seed‑to‑Series‑B stage.
What’s on offer: £80,000–£100,000 base + annual company performance bonus. Meaningful EMI share options. £15/day lunch budget when working from the London office. £1,000 home office setup + £500/year top‑up.
If you read this far and you’d like your CV reviewed by a human, email mark@seekr.inc with "Watch me React" in the subject line. A couple of lines on why you think this might be a good fit — that’s all.
Senior Frontend Developer employer: SEEKR
Contact Detail:
SEEKR Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Frontend Developer
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with people on LinkedIn. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio that highlights your best work, especially projects that showcase your React and TypeScript expertise. Make sure it’s easy to navigate and visually appealing – just like the UI you’ll be building!
✨Tip Number 3
Prepare for interviews by brushing up on common frontend challenges and performance optimisation techniques. Be ready to discuss your thought process and how you tackle edge cases – they’ll want to see your UX sense in action!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take the initiative to engage with us directly.
We think you need these skills to ace Senior Frontend Developer
Some tips for your application 🫡
Show Off Your Portfolio: Make sure to include a link to your portfolio in your application. We want to see the projects you've worked on, especially those that highlight your attention to detail and UX sense in B2B SaaS flows.
Tailor Your CV: Customise your CV to reflect the skills and experiences that align with our job description. Highlight your experience with React, TypeScript, and any relevant frameworks like Svelte. We love seeing how you can fit into our team!
Be Authentic: When writing your cover letter or email, be yourself! Share why you're excited about this role and how you can contribute to our mission. We appreciate genuine enthusiasm and a personal touch.
Apply Through Our Website: We encourage you to apply through our website for a smoother process. It helps us keep track of applications and ensures you don’t miss out on any important updates from us!
How to prepare for a job interview at SEEKR
✨Know Your Tech Stack
Make sure you’re well-versed in React and TypeScript, as these are crucial for the role. Brush up on hooks, suspense, and server components, and be ready to discuss how you've used them in your past projects.
✨Showcase Your UX Sense
Prepare examples from your portfolio that highlight your understanding of B2B SaaS flows. Be ready to discuss specific auth flows, billing pages, and dashboards, and how you’ve navigated potential pitfalls in those areas.
✨Demonstrate Performance Optimisation Skills
Since performance is a key focus, come prepared to talk about how you’ve instrumented Core Web Vitals and set bundle budgets in previous projects. Share any experiences where you’ve chased performance improvements and the impact it had.
✨Be Ready for Design Critiques
As the voice of quality, you’ll need to host design critiques. Think about how you would approach giving constructive feedback and be prepared to discuss how you’ve pushed back on product designs in the past when necessary.