Remote Senior AI Software Engineer - LLM & AI Systems

Lloyds Banking Group; Peggs Green; Remote; GBP 120,000 - 160,000; Full time

Job summary

Aveni is redefining how financial institutions use AI by building production-ready agentic systems that streamline workflows for banks, advisers, and financial services firms. We are seeking a hands-on Senior AI Software Engineer with strong full-stack experience to ship AI-powered products in production, leveraging FinLLM (the UK's first LLM for Financial Services) and other LLMs.

You will own features end-to-end across backend, frontend, and cloud infrastructure, mentoring engineers and

Qualifications

• Extensive software engineering background building, deploying, and running production AI applications.
• Strong hands-on experience with Node.js, TypeScript and production React.
• Experience with prompt engineering, agentic workflows, RAG, and LLM integration.
• Knowledge of AI evaluation frameworks, monitoring, and observability.
• Deep understanding of AWS, cloud-native engineering, APIs, and integration patterns.
• Experience with microservices, messaging patterns, event-driven and distributed architectures.
• Commitment to quality, clean code, testing, and CI/CD.

Responsibilities

• Build production-ready, AI-powered products integrating LLM capabilities, RAG, and agentic workflows into real-world processes.
• Select models, orchestrate prompts, design systems, and implement AI tooling (e.g., LangGraph, Langfuse).
• Design evaluation, monitoring, and observability to ensure reliability and readiness for production.
• Develop scalable, event-driven microservices and APIs using Node.js and TypeScript.
• Build modern, responsive React frontends to make AI useful in customer workflows.
• Architect cloud-native systems on AWS (Lambda, ECS/Fargate, API Gateway, SQS/SNS, DynamoDB, RDS).
• Implement microservices, distributed-system principles, and strong operational controls for integration into financial products.
• Uphold engineering best practices: clean code, automated testing, CI/CD, and operational excellence.
• Diagnose and improve production behaviours relating to reliability, latency, cost, and AI quality.
• Mentor engineers, contribute to team growth, and collaborate closely with product and engineering to deliver customer-ready features.

Skills

Node.js

TypeScript

React

Prompt engineering

LLM integration

RAG

AWS

Microservices

CI/CD

Observability

Tools

LangGraph

Langfuse

NestJS

Job description

Aveni is redefining how financial institutions use AI by building production-ready agentic systems that streamline workflows for banks, advisers, and financial services firms. We are seeking a hands-on Senior AI Software Engineer with strong full-stack experience to ship AI-powered products in production, leveraging FinLLM (the UK's first LLM for Financial Services) and other LLMs.

You will own features end-to-end across backend, frontend, and cloud infrastructure, mentoring engineers and