Founding Engineer: AI Payments & Platform Architect

Ralio; Greater London; Hybrid; GBP 100,000 - 180,000; Full time

Benefits offered by this job

Equity stake

Hybrid work in London

Job summary

Ralio, London-based payments layer for AI agents, is hiring founding engineers to architect our codebase and guide engineering culture from the ground up. Hybrid in London with an office in Shoreditch, you will design high-throughput payment integrations, robust guardrails, and scalable systems to prevent fraudulent transactions.

You will own end-to-end delivery across architecture, APIs, frontend, and deployment, shape the technical vision, and operate as both engineer and product thinker in a

Qualifications

• AI Experience: Proven track record of building products integrated with AI.
• Agentic Proficiency: Familiarity with agentic architectures and frameworks (e.g., LangGraph, OpenAI Agents SDK).
• Versatility: Proficient in multiple programming languages (we primarily use Python and TypeScript).
• Full-Stack Capability: Hands-on experience with our stack: React, CLI development, MCPs, IaC, and PostgreSQL.
• Efficiency-Focused: A mindset for automation and continuous improvement.
• Domain Expertise: Experience with payment systems is highly valued.

Responsibilities

• Own End-to-End Delivery: From architecture and APIs to frontend, UX, infrastructure, and deployment.
• Shape Technical Vision: Make foundational decisions about our technology stack and infrastructure.
• Wear Many Hats: Act as an engineer, product thinker, and problem-solver.
• Drive Impact: Translate high-level business goals into scalable technical architecture.

Skills

AI Experience

Agentic Proficiency

Versatility

Full-Stack Capability

Efficiency-Focused

Domain Expertise

Python

TypeScript

React

CLI development

IaC

PostgreSQL

Tools

LangGraph

OpenAI Agents SDK

Job description

Ralio, London-based payments layer for AI agents, is hiring founding engineers to architect our codebase and guide engineering culture from the ground up. Hybrid in London with an office in Shoreditch, you will design high-throughput payment integrations, robust guardrails, and scalable systems to prevent fraudulent transactions.

You will own end-to-end delivery across architecture, APIs, frontend, and deployment, shape the technical vision, and operate as both engineer and product thinker in a