Neutron stars and Senior Software Engineers (Node.js, Next.js, NestJS, NoSQL)

Company: Mongoose Gray
Apply for the Neutron stars and Senior Software Engineers (Node.js, Next.js, NestJS, NoSQL)
Location: London
Job Description:

Neutron stars are unbelievably dense, thus a single teaspoon of neutron star material would weigh a billion tonnes on Earth. We need razor-sharp builders. Don’t be a neutron star.

There are 2 versions of this ad. Below is the anodyne version. Bonus points if you can find the more analeptic version. And provide proof of your quest. Good luck!

  • The Senior Software Engineer will work for a hypergrowth SaaS scaleup.
  • The Senior Software Engineer will earn £150,000 plus equity.
  • The Senior Software Engineer will enjoy hybrid working in London.
  • The Senior Software Engineer will be engineer first, SRE second.
  • The Senior Software Engineer will have a decade of engineering experience.
  • The Senior Software Engineer will work closely with the Head of Engineering on technical strategy and architecture decisions.
  • The Senior Software Engineer will have agentic workflow design skills.
  • The Senior Software Engineer will mentor a small team of accomplished engineers.
  • The Senior Software Engineer will live and breathe startup culture.
  • The Senior Software Engineer will be highly analytical and numerate.
  • The Senior Software Engineer will have a stellar academic track record.
  • The Senior Software Engineer will be responsible for building and maintaining highly secure, performant and scalable systems.
  • The Senior Software Engineer will nurture and oversee the building of reliable data pipelines by our Data Engineering team.
  • The Senior Software Engineer will get close to the product.
  • Senior Software Engineer will implement microservices magic, all hosted on the Cloud (GCP preferred).
  • The Senior Software Engineer will design, build, and operate production systems that leverage LLMs as reasoning engines.
  • The Senior Software Engineer will orchestrate multi-step agentic workflows to complete tasks autonomously.
  • The Senior Software Engineer will need the 3 Ns. Node.js, Next.js and NestJS. No joke.
  • The Senior Software Engineer will be familiar with NoSQL databases.
  • The Senior Software Engineer will have the vision to architect, design and build scalable systems across the full stack.
  • The Senior Software Engineer will work extensively with Claude Code.

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Posted: September 20th, 2026