Founding Engineer

Location: Hybrid in London (we currently have an office in Shoreditch)

Compensation: Salary + Stock Options (so you share in our collective success)

The Opportunity

Ralio is the payments layer for AI agents. We’ve raised over $2.5 million from strong early investors and are now hiring Founding Engineers to shape the product, architecture and engineering culture from the ground up. This is a high-impact, high-agency role; you will be the architect of our codebase and the seed of our engineering team.

You will build the platform that allows AI agents to transact safely. This includes engineering high-throughput payment integrations, designing robust agent guardrails, and architecting systems that prevent fraudulent transactions.

What You'll Do

• 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.

Who You Are

• A Builder: Excited by building from scratch; you balance craft with the importance of speed.
• Product-Minded: You care about the why behind every feature and are willing to challenge assumptions to ensure product-market fit.
• Comfortable with Ambiguity: You don’t need a detailed spec sheet; you can take a high-level goal and determine the implementation details.
• Language Agnostic: You have a preferred stack but are willing to pick up whatever tool solves the problem best.

What You'll Bring

• 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.

What We Offer

• True Ownership: A significant equity package reflecting your role as a foundational partner.
• High Impact: Work at the cutting edge of AI and fintech, free from bureaucracy.
• Outcome-Driven Flexibility: We prioritize high-bandwidth, face-to-face communication, while maintaining flexibility regarding hours and location.
• Experienced Team: Join seasoned fintech founders backed by top-tier investors. We believe in high-intensity work balanced with long-term well-being.