Senior Full-Stack Engineer - AI Agent Platform

Ebury helps ambitious businesses unlock global growth, and we take the same approach with our people. We encourage innovation and movement, collaboration and problem-solving, and foster an environment where everyone can feel they belong, are valued, supported and empowered to succeed.

If you’re a collaborator who wants to help transform how businesses operate globally, get in touch - we’d love to discuss how Ebury can accelerate your career so you can shape the future.

Senior Full-Stack Engineer - AI Agent Platform

London Victoria Office - Hybrid: 4 days in the office, 1 day working from home

About the Role

We're building an AI-powered financial crime investigation platform that's transforming how Ebury's compliance teams work. Our AI agents will process thousands of screening cases, reducing analyst workload while maintaining regulatory standards.

We're looking for a Senior Full-Stack Engineer to help us scale our platform and raise the engineering bar. You'll architect and deliver complex features across the entire stack - from React frontends to Python backends to LLM integrations - while mentoring teammates and shaping our technical direction.

This is a unique opportunity to work at the intersection of AI/ML, fintech, and compliance - building production AI systems that handle real financial crime investigations at scale.

What You'll Do

Architect and build end-to-end features across our React frontend and FastAPI backend, making sound technical decisions that balance speed with maintainability

Design AI agent workflows using LangGraph for screening automation, RAG pipelines, and multi-agent orchestration

Lead technical initiatives - own complex features from design to production, breaking down ambiguous problems into actionable work

Integrate complex data sources (internal APIs, third-party services like LexisNexis, data warehouse) with robust error handling and observability

Improve platform reliability - implement monitoring, alerting, and performance optimizations for production AI systems

Mentor and uplift junior and mid-level engineers through code reviews, pairing, and technical guidance

Shape engineering practices - contribute to architecture decisions, coding standards, and team processes

Collaborate cross-functionally with Product, Design, Compliance, and other engineering teams to deliver impactful solutions

Tech Stack

Frontend

React, TypeScript, Material-UI

Module Federation (Micro-frontend architecture)

Vite, Vitest

Backend

Python 3.13, FastAPI

LangGraph (AI agent orchestration)

LlamaIndex (RAG/vector search)

AWS Bedrock

DynamoDB, OpenSearch Serverless

Infrastructure

AWS (ECS Fargate, Lambda, API Gateway, S3)

Terraform, GitHub Actions

Docker, Kubernetes

Sentry, Langfuse (LLM observability)

What We're Looking For

Must Have

5+ years of professional software engineering experience

Strong React + TypeScript skills - you can architect complex frontend applications with good state management, performance, and testing

Strong Python backend experience - FastAPI, Django, or Flask with async programming, clean architecture, and production-grade code

System design skills - you can design scalable, maintainable systems and articulate trade-offs clearly

API design expertise - REST, WebSockets/SSE, and understanding of distributed systems patterns

Database proficiency - SQL and NoSQL (DynamoDB, PostgreSQL, OpenSearch), including query optimization and data modeling

Testing mindset - you write comprehensive tests and advocate for quality across the team

Ownership mentality - you take features from idea to production, proactively identifying and solving problems

Strong communication - you can explain complex technical concepts to engineers and non-engineers alike, and write clear documentation

Mentorship ability - you enjoy helping others grow and have experience guiding less experienced engineers

Nice to Have

LLM/AI experience - LangChain, LangGraph, RAG pipelines, prompt engineering, or fine-tuning

Production AI systems - experience with LLM observability (Langfuse), token management, streaming, and reliability patterns

AWS expertise - Lambda, ECS, DynamoDB, OpenSearch, Bedrock, or similar cloud services

Streaming architectures - SSE, WebSockets, event-driven systems

Fintech/compliance background - AML, sanctions screening, KYC, or regulated industry experience

Micro-frontend experience - Module Federation, independent deployability

Infrastructure as Code - Terraform, CDK, or similar

What Sets Senior Apart

We're looking for engineers who demonstrate

Technical leadership - You don't just complete tasks; you identify the right problems to solve and influence technical direction

Systems thinking - You consider the broader context: scalability, security, observability, and maintainability

Proactive communication - You surface risks early, propose solutions, and keep stakeholders informed

Quality advocacy - You raise the bar for testing, code review, and documentation across the team

Pragmatic decision-making - You balance ideal solutions with delivery timelines, making conscious trade-offs

Continuous learning - You stay current with industry trends and bring new ideas to the team

Why Join Us ?

Greenfield AI Product : You'll help shape a product from early stages, not maintain legacy code. Your architectural decisions will have lasting impact.

Technical Leadership : Drive technical direction for a growing team. Mentor engineers and establish patterns that scale.

Cutting-Edge A I: Work with the latest LLM technologies in production - LangGraph, RAG, multi-agent systems, and more.

Real Impact : Our AI agents process thousands of compliance cases. You'll see your work making a difference within weeks.

Startup-within-Enterprise : Small, autonomous team with startup speed, backed by enterprise resources and stability.

About us

Ebury delivers sophisticated, integrated solutions — business accounts, hedging, and financing — on a single platform with a seamless workflow. Our success is built on a simple premise and singular purpose: To help businesses operate and scale globally.

Since its founding in 2009, Ebury has always been a fast-growing leader in fintech. Today, we bring together 2000+ Eburians across nearly 70 cities and we’re always looking to add to our team.

At the heart of our offering is a proprietary platform, purpose-built to help businesses seamlessly streamline and manage global cash flow. We focus on continuous product evolution and innovation to build the infrastructure for borderless growth and help our clients scale at every stage.

The opportunities at Ebury are as diverse as our people, ranging from business development to engineering roles across our tech pillars.

We believe in inclusion. We stand against discrimination in all forms and are against the intolerance of differences that makes us a modern and successful organisation. At Ebury, you can be whoever you want to be and still feel a sense of belonging no matter your story.