Senior Product Engineer 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

About Kernel Kernel provides enterprise RevOps teams with AI-powered company data for their CRMs. We raised $14M in Series A funding from top VCs and operators at Plaid, OpenAI, and Slack to build an AI-native alternative to Dun & Bradstreet's entity and hierarchy data. RevOps teams at Navan, Gong, Mistral, and AlphaSense use Kernel to run their organizations. At Kernel, we process 7B+ tokens a day and run 1.8M+ agents daily, all on an architecture that’s intentionally simple: one database, one queue. It’s minimalism built for massive scale (For reference, Wikipedia has 2.3B tokens in the English wikipedia). Our queue processes a daily volume on par with the entire Visa network’s transactions (~365M/day). All of which has been built by a small but mighty team of engineers. The Role You are a T-shaped product engineer with a spike in backend engineering. You will work closely with the product and engineering team to build user-facing features, ship at pace, and support the existing infrastructure as we scale. You do not need to be a DevOps expert, but familiarity with AWS and Kubernetes is valuable. You take initiative, adapt quickly, and communicate clearly. The team is small and fast-moving, so you’ll be expected to make decisions and ship code autonomously. You will help the company grow from $3M to $30M ARR, owning projects end-to-end—from ideation to deployment—while helping shape how we build products and infrastructure at Kernel. What You’ll Be Doing Designing and developing product features that directly impact user workflows Collaborating with design, product, and other engineers to deliver exceptional user experiences Writing and maintaining clean, reliable, and scalable code across the stack Helping ensure performance and reliability for large-scale data operations Automating workflows to improve developer velocity and reduce manual work Supporting integrations with CRMs and third-party APIs Participating in roadmap discussions and contributing technical insights What You Bring 6+ years of software or product engineering experience Strong experience building and scaling production systems Comfort with backend engineering (NodeJS, Postgres, TypeScript) Strong understanding of LLM application development patterns (RAG, prompt engineering, consistency testing) - either through production experience or demonstrated personal projects. If you're new to LLMs but have shipped complex production systems in other domains and are comfortable rapidly learning new technologies, we'd still love to hear from you. Ability to operate autonomously in a small, high-velocity team Excellent communication and collaboration skills Some experience with Kubernetes or distributed systems It is a plus if you also have: Experience working on AI-driven or data-heavy products Frontend experience (NextJS, React, TypeScript) Understanding of CRM data models or workflow automation ⚠️ This role may not be for you if you: Need lots of structure or long-term roadmaps Prefer perfect specs before building Focus narrowly on backend or frontend only ❌ This role is definitely not for you if you: Prefer fully remote work (this role requires at least 3 days a week in the office) Don’t enjoy the pace of early-stage startups Want to manage a team rather than build What We Offer We will do our best to offer you a ride of a lifetime. It will not be easy, but it will be thrilling. 💰 Salary: £110,000 – £170,000 + equity 🗓️ 24 days holiday per year + bank holidays ✈️ 2 weeks work-from-anywhere 💼 Pension plan 💻 Top-spec equipment and central London office 🍽️ Free dinner at the office 🎉 Team events and dinners 🚀 Work directly with the founders to scale the systems that power enterprise AI 🛠️ Tech Stack Back-end (AWS): NodeJS, TypeScript, Postgres Front-end: NextJS, TypeScript, Tailwind Workflow automation: n8n ❤️ Team We are around 30 people with 7 engineers and 1 Product Manager, including: Sam Houghton, Founding Engineer Eleanor Leung, Senior Engineer David Saltares, Senior Engineer Stefan Sabev, Head of Product Tom Ankers, Senior Engineer Willis Chou, Senior Engineer 🎫 Visas & Relocation We sponsor visas for exceptional candidates and provide relocation support for those moving to London. Interview Process Stage 1: Introductory Call (40 minutes) Stage 2: Hiring Manager Call (40 minutes) Stage 3: Take-Home Task (≤ 2 hours) Stage 4: Technical Interview (90 minutes) Final Stage: Founders Interview - a conversation with Anders (CEO) and Marcus (CTO) focused on values alignment and long-term vision. Following Mutual Fit: Reference checks and offer stage.

Responsibilities

The engineer will be responsible for designing and developing product features that directly impact user workflows, collaborating across teams to deliver exceptional user experiences, and writing clean, scalable code across the stack. They will also help ensure performance and reliability for large-scale data operations and automate workflows to improve developer velocity.

Requirements

Candidates must have 6+ years of software or product engineering experience with strong proficiency in backend engineering using NodeJS, Postgres, and TypeScript, alongside comfort with LLM application development patterns. The role requires the ability to operate autonomously in a fast-moving team and excellent communication skills, with familiarity in AWS and Kubernetes being valuable.

Key skills

• Backend Engineering — in 127 other listings on The Stack
• NodeJS — in 24 other listings on The Stack
• Postgres — in 69 other listings on The Stack
• TypeScript — in 467 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
• Consistency Testing — in 1 other listing on The Stack
• AWS
• Kubernetes
• Distributed Systems
• NextJS
• React
• Tailwind
• CRM Data Models
• Workflow Automation

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

• Kernel has 7 other listings on The Stack, 6 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 170,000 per year) is higher than 8 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 Senior Product Engineer role still open?

It was posted on 2026-03-10. Listings more than 30 days old may no longer be active, so check Kernel's site before applying.

Where is this role located?

The listing gives the location as London, United Kingdom. It is marked remote.

What is the salary for this role?

The listing states a salary of GBP 110,000–170,000 per year.

What skills does this role ask for?

The listing names: Backend Engineering, NodeJS, Postgres, TypeScript, LLM Application Development, RAG, Prompt Engineering, Consistency Testing, AWS, Kubernetes, Distributed Systems, NextJS, React, Tailwind, CRM Data Models, Workflow Automation.