Founding Engineer

Ralio; Greater London; On-site; GBP 120,000 - 190,000; Full time

Benefits offered by this job

Ownership equity

Impactful work

Flexible hours & location

Job summary

Ralio is building the payments layer for AI Agents. As a Founding Engineer in Greater London, you will architect the product, shape the tech stack, and drive execution from scratch.

The role offers ownership equity and a high-impact environment with strong early investor backing. You’ll own core platform components, guardrails, and integrations with payment providers, while growing a founding engineering team.

Qualifications

• Experience building products with AI.
• Proficiency in Python and TypeScript; strong frontend (React) and backend (Supabase) skills.
• Ability to work across architecture, product, and engineering with high autonomy.

Responsibilities

• Own end-to-end delivery of product features from architecture to frontend and deployment.
• Shape the technical vision and make foundational decisions about the stack and infrastructure.
• Wear many hats: engineer, product thinker, problem-solver.
• Help build a platform enabling AI Agents to pay safely and securely.

Skills

AI product development

Full-stack development

Tools

Autogen

LangGraph

Google ADK

OpenAI Agents SDK

Job description

Compensation: Competitive salary + significant stock options

The Opportunity

Ralio is the payments layer for AI Agents. If you can imagine the challenges that this brings, please keep reading.

We’re backed by very strong early investors and are now hiring Founding Engineers to help shape the product, architecture, and engineering culture from the ground up.

This is a high-impact, high-agency role. You are the architect of our future codebase and the seed of our future engineering team.

What you’ll build

You will build the platform that AI Agents need to be able to pay safely. This involves building AI Agents, guardrails and integrations with payment providers, among other things.

What You’ll Do

• Own end-to-end delivery of product features, from architecture and APIs to frontend, UX, infrastructure and deployment
• Shape the technical vision and make foundational decisions about our technology stack and infrastructure
• Wear many hats: engineer, product thinker, problem-solver
• You’ll be challenged, you’ll grow, you’ll build something exciting

Who You Are

• A Builder: You’re excited by building from scratch. You care about craft, but you also understand the importance of speed.
• Product-Minded: You care about why we are building a feature, not just how. You are willing to push back on founders if a feature doesn't make sense for the user.
• Comfortable with Ambiguity: You don't need a detailed spec sheet. You can take a high-level goal and figure out the implementation details.
• Language Agnostic: You may have a preferred stack, but you are willing to pick up whatever tool does the job best.

You want to join a company early enough that your fingerprints are everywhere, but with the backing and clarity to go fast.

What You’ll Bring

• Experience building products with AI
• Familiarity with agentic frameworks like Autogen, LangGraph, Google’s ADK, OpenAI Agents SDK
• Programming languages are a tool, ideally you are proficient in more than one, but we use Python and Typescript
• You have full stack experience, we use React and Supabase
• Experience with payments systems is a plus

What We Offer

• Ownership: Significant equity package. You are not just an employee; you are a partner in our success
• Impact: Your work will be on the edge of what’s possible. No red tape, no bureaucracy
• Flexibility: We are in a rapidly changing environment, so we prioritise face to face communication as it’s still the most effective style. We are at the same time outcome driven and flexible on working hours and location
• The Team: We are experienced fintech founders with payments and AI background, and we are backed by a great group of investors and advisors.
• Growth: You are not only guaranteed, but expected to grow
• Benefits: Other great perks like health & wellness allowance