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# Founding Engineer

- **Company:** Opportunityralio
- **Location:** London, UK
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Datasheets, Payment Systems, Python (Programming Language), TypeScript, ReactJS, Front End Software Development, Service Stack, Programming Languages
- **Published:** October 1, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/founding-engineer/49514127

## About the Role

problem-solver.Drive Impact: Translate high-level business goals into scalable technical architecture.Who You AreA 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 BringAI 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 OfferTrue 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. #J-18808-Ljbffr

## Description

Location: Hybrid in London (we currently have an office in Shoreditch)Compensation: Salary + Stock Options (so you share in our collective success)The OpportunityRalio 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 DoOwn 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