Founding Software Engineer at Cypress Labs | GB | Rezi

Founding Software Engineer at Cypress Labs

Founding Software Engineer

Cypress Labs · GB

3 weeks ago

Founding Software Engineer

Cypress Labs · GB

a month ago
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About the Role

Cypress is building a generational company to enable the future of ownership by creating a platform that continuously models businesses as they run, constructing a living representation that agents can act on and owners can collaborate with. This changes who can own a business, how those businesses are operated, and how far they can go.

Responsibilities

  • Extend the core platform: event sourcing, domain modeling, agent orchestration
  • Ship, operate, monitor, maintain production infrastructure
  • Build AI agent capabilities: tool design, context assembly, sub-agent architectures, evals
  • Integrate external systems: POS, accounting, labor scheduling, weather, banking APIs
  • Onboard new merchants, diagnose issues, and translate operational needs into system capabilities

Requirements

  • Experience shipping production software at an organization where craft and tempo are taken seriously
  • Range across the stack, having worked across backend, infrastructure, and data layers
  • Ability to quickly grasp unfamiliar concepts
  • Craft in code: clean, concise, well-reasoned, with an instinct to simplify
  • Systems thinking: reasoning about component interaction, state management, data flow, and performance under load
  • Comfort with mathematical concepts such as stochastic differential equations, Bayesian inference, and Monte Carlo methods
  • Experience building with LLMs beyond wrapper apps, integrating AI with structured tools, domain logic, and feedback loops
  • High agency: energized by ambiguity to find clarity
  • Customer instinct: comfortable talking to business owners, handling messy real-world data, and translating evidence into engineering priorities

Skills

  • Event sourcing
  • Domain modeling
  • Agent orchestration
  • Production infrastructure management
  • AI agent development
  • External system integration (POS, accounting, labor scheduling, weather, banking APIs)
  • LLM integration
  • Backend development
  • Infrastructure development
  • Data layer development

Location

  • London

Work Type

  • In person
  • Full-time

Experience Level

  • Open to a broad range of experience levels if work demonstrates high learning rate

Salary/Compensations

  • £100k to £155k base
  • Meaningful equity reflecting a founding role

Benefits

  • Founding-team equity
  • Direct ownership of the stack

About the Company

  • Cypress Labs is backed by top-tier venture capital and a roster of angel investors with operational expertise.
  • Founded by Spencer Wilson (MIT, Marshall Scholar, UCL neuroscience PhD, previously Ctrl-Labs and Trisk Bio) and Josh Hone (first commercial hire at bootstrapped Quorum, COO at venture-backed Column).
  • We aim for a high revenue-to-headcount ratio and a high-trust, high-ownership culture.
  • Product is already working with early design partners.

Equal Opportunity

  • Read our recruiting privacy notice for how Cypress uses your application information and how to exercise your privacy rights.