Humanloop Logo

Humanloop

Product Engineer

Posted 6 Days Ago
Hybrid
London, England, GBR
Entry level
Hybrid
London, England, GBR
Entry level
Build and ship customer-focused software across the full stack for an AI developer platform. Responsibilities include developing Python backend services, TypeScript and React frontend features, deploying infrastructure on AWS, writing clean and effective code, and solving customer needs end-to-end. The role involves working with LLM evaluation, fine-tuning, and experimentation tools in a fast-moving early-stage environment.
The summary above was generated by AI
About Humanloop

Large Language Models and AI more generally are the next computing platform. Millions of developers will be building with this technology and at Humanloop you'll have a chance to work at the frontier and shape the future.

You'll get the chance to work really hard on a problem that matters alongside super-smart people who are passionate about what they do. The environment is fast-paced with new features being shipped every week or even every day. The customers we get to work with are themselves inspiring AI startups who are also trying to use this amazing new technology to build products and services that were previously science fiction.

About the role

Skills: JavaScript, Python, React

A Product Engineer is a product-focused full stack Software Engineer.

We’re a small, smart and hard working team, working in a very fast moving space at the frontier of AI. It's crucial that you can quickly work throughout the stack to deliver product end-to-end while caring deeply about solving underlying customer needs. Meaningful impact is guaranteed.

It doesn’t matter what languages and tools you know when you join us, but it does matter that you can write clean, effective code and craft elegant solutions. We aim for a clean, simple modern stack, which is currently:

  • Python backend (FastAPI, Postgres)

  • TypeScript frontend (Next.js, React, Tailwindcss)

  • AWS for most of our infrastructure

About you
  • You care deeply about customer needs and solving them with product.

  • You're excited by our mission and the potential of machine learning and artificial intelligence.

  • You are able to, or want to be able to, work at every level of the stack.

  • You’re excited by being one of the first employees in an early-stage company where you can have autonomy and impact.

  • You want to grow. The success of our company is a function of the people in our team. Your growth rate will be directly causal to Humanloop's growth rate. We spend a lot of time thinking about each other’s success paths.

  • You get excited about learning new things, writing blog posts and going to conferences to talk about all things product and engineering.

Experience

We think that people with amazing ability can come from all sorts of backgrounds, not necessarily prestigious schools or companies. You primarily need to prove that you can write excellent, clean code and care deeply about building great product. You can demonstrate this through your own projects, OSS contributions or experience at other companies. When looking at your contributions, we value quality over quantity.

Offices in London and San Francisco

We find that in person time allows us to move faster, learn from each other and have more fun. Everyone is in the office on Tuesdays and Wednesdays. On other days you can choose to work from home or in the office. Our London office has most of product and engineering, and our new SF office is primarily focused on GTM.

Technology

Our current stack is

  • A Python backend with pytorch for our deep learning framework

  • Next/React for our frontend

  • AWS for most of our infrastructure

We're building software tools to help developers and founders evaluate how well their LLM apps are working and improve them through finetuning and experiments. By using Humanloop, companies can build much more defensible products on top of models like GPT-3.

HQ

Humanloop London, England Office

London, United Kingdom

Similar Jobs

2 Days Ago
Hybrid
London, Greater London, England, GBR
Senior level
Senior level
Artificial Intelligence • Software
Own customer problems end to end within small product-engineering pods, from discovery through production and iteration. Design robust, observable systems; direct AI agents to produce implementation and tests; review and harden their output; and work across frontend, backend, data, and infrastructure. Senior staff engineers set technical direction, raise quality standards, lead cross-cutting work, make decisions under ambiguity, and take accountability for customer and business outcomes.
Top Skills: Artificial IntelligenceCC++PythonRust
2 Days Ago
Hybrid
London, Greater London, England, GBR
Entry level
Entry level
Artificial Intelligence • Software
Build and ship production systems end-to-end within small, cross-functional pods. Product Engineers discover customer problems, design solutions, direct AI agents, review and harden generated code, and work across front end, back end, data, and infrastructure. The role emphasizes robust systems, testing, observability, performance, resource efficiency, product judgment, customer engagement, and ownership of outcomes in a polyglot, AI-native environment.
Top Skills: AICC++PythonRust
2 Days Ago
Hybrid
London, Greater London, England, GBR
Entry level
Entry level
Artificial Intelligence • Software
Build and operate production systems end-to-end within small, cross-functional pods. Product Engineers discover customer problems, design solutions, direct AI agents, review and harden generated code, and work across frontend, backend, data, and infrastructure. The role requires strong engineering judgment, testing and observability practices, product and design awareness, comfort with ambiguity, and ownership of customer outcomes. Staff-level responsibilities include setting technical direction, maintaining quality standards, and leading cross-cutting engineering work.
Top Skills: Ai AgentsAutomated TestingCC++ObservabilityProduction SystemsPythonRust

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account