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Rivulo

Rivulo

Job listing

London, United Kingdom£100K + Equity

Principal Engineer at Seed-funded AI automation startup

Join an elite team as the first technical hire for a London-based AI startup led by founders with multiple successful exits. This isn't just another wrapper; you'll be building the infrastructure that allows non-technical teams to deploy complex, reliable agent-led workflows. With 2% equity, radical autonomy, and a technical stack moving toward the frontier of multi-model orchestration, this is a career-defining opportunity to shape a company from the ground up while solving deep engineering challenges in LLM reliability and browser automation.

Overview

Role overview

As the first technical hire, you will take over the codebase from the technical co-founder to build a scalable, production-grade platform. You'll architect systems that convert user demonstrations into autonomous AI workflows using multi-model orchestration. This is a high-autonomy role for a hands-on builder eager to solve complex AI reliability and infrastructure challenges.

Company

Rivulo

Rivulo

Software

Seed-funded London AI startup led by multi-exit founders building a bridge for non-technical teams to deploy reliable, agent-powered automation systems.

Responsibilities

What you will do

  • Own the technical evolution of the platform, transitioning the v1 MVP into a robust, high-scale infrastructure capable of handling thousands of concurrent AI workflows.
  • Design and implement sophisticated multi-model AI orchestration, coordinating LLMs like GPT-4, Claude, and Gemini to optimize cost and performance for complex tasks.
  • Lead the development of smart systems for AI-powered workflow understanding, browser automation, and integrations with enterprise tools like Slack and Google Workspace.

Candidate profile

Who this is a fit for

  • Proven full-stack expert with deep experience in TypeScript, React, and a willingness to master or evolve a Laravel/PHP backend into a modern Node.js ecosystem.
  • Deep technical proficiency in AI engineering, including prompt engineering, context window management, and handling real-time streaming and reliability for LLM APIs.
  • Entrepreneurial mindset with the ability to move fast in a 0-to-1 environment, comfortable wearing multiple hats and engaging directly with customers to solve problems.

What makes it remarkable

Why this role is remarkable

  • Join as the first engineering hire with 2% equity, working directly alongside experienced founders who have successfully scaled and exited multiple companies.
  • Operate with radical transparency and a self-management philosophy where you own the technical roadmap without bureaucratic hurdles or unnecessary sign-offs.
  • Build at the frontier of AI, moving beyond simple wrappers to create deep integrations, browser automation, and sophisticated token-management systems for real-world business operations.

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