Product Engineer (Frontend) at Kernel

✨ The Stack take on this Kernel job

• 🏢 Kernel has 8 jobs here, 6 with visa sponsorship see all
• 🛂 Skilled Worker visa. Standard minimum salary: £41,700 a year guide

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Design and build user-facing features with Next.js, React and TypeScript, owning projects end‑to‑end from idea to deployment.
- Collaborate closely with product, design and backend engineers to deliver high‑quality, performant UI and UX.
- Write maintainable, tested frontend code and help maintain shared frontend infrastructure and performance tooling.
- Implement and support integrations with CRMs and third‑party APIs; automate developer workflows to speed delivery.
- Participate in roadmap planning, provide technical input and help shape product and infrastructure decisions.

Requirements:
- 6+ years software or product engineering experience with strong frontend expertise (Next.js, React, TypeScript).
- Good UI/UX sensibilities and attention to detail in implementing complex interfaces.
- Familiarity with LLM application patterns (RAG, prompt engineering) or strong motivation and ability to learn quickly.
- Experience working autonomously in small, high‑velocity teams and communicating clearly across disciplines.
- Nice to have: backend experience (Node.js, Postgres), CRM familiarity, and experience with performance optimisation at scale.

Responsibilities

You will design and develop user-facing product features while collaborating with cross-functional teams to deliver exceptional experiences. Additionally, you will maintain scalable code, support CRM integrations, and contribute to technical roadmap discussions.

Requirements

The role requires 6+ years of software engineering experience with expert-level proficiency in frontend technologies like NextJS, React, and TypeScript. Candidates should possess strong UI/UX sensibilities and experience with LLM application development patterns.

Key skills

• Frontend engineering — in 15 other listings on The Stack
• NextJS — in 25 other listings on The Stack
• React — in 277 other listings on The Stack
• TypeScript — in 467 other listings on The Stack
• UI/UX design — in 13 other listings on The Stack
• LLM application development — in 7 other listings on The Stack
• RAG — in 41 other listings on The Stack
• Prompt engineering — in 59 other listings on The Stack
• NodeJS
• Postgres
• Tailwind
• n8n
• Product engineering
• API integration
• Performance optimization

On The Stack (as of 2026-11-05)

• Kernel has 7 other listings on The Stack, 5 of them marked as offering visa sponsorship.
• 214 visa-sponsored jobs in the United Kingdom on The Stack, posted in the last 60 days.
• The top of its stated salary (GBP 140,000 per year) is higher than 6 of the 16 other GBP per-year salaries stated by listings in the United Kingdom on The Stack.

Frequently asked questions about Kernel

Is this Product Engineer (Frontend) role still open?

It was posted on 2026-04-16. Listings more than 30 days old may no longer be active, so check Kernel's site before applying.

Does Kernel offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Kernel's site.

Where is this role located?

The listing gives the location as London, United Kingdom. It is marked on-site.

What is the salary for this role?

The listing states a salary of GBP 110,000–140,000 per year.

What skills does this role ask for?

The listing names: Frontend engineering, NextJS, React, TypeScript, UI/UX design, LLM application development, RAG, Prompt engineering, NodeJS, Postgres, Tailwind, n8n, Product engineering, API integration, Performance optimization.