Remote Senior AI Software Engineer

Lloyds Banking Group; Mexborough; Remote; GBP 70,000 - 110,000; Full time

Job summary

Aveni is redefining how financial institutions use AI, building production-ready agentic systems that streamline banks, advisers, and asset managers.

The team delivers end-to-end AI-enabled products, from model selection and prompt orchestration to monitoring, observability, and regulatory compliance.

We seek a hands-on Senior AI Software Engineer with strong full-stack skills to ship AI-powered solutions using FinLLM and other LLMs in production.

Qualifications

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

Responsibilities

• Build production-ready AI-powered products integrating LLM capabilities and agentic workflows.
• Select models, orchestrate prompts, design systems, and implement AI tooling.
• Design evaluation, monitoring, and observability for production readiness.
• Develop scalable, event-driven microservices and APIs using Node.js/TypeScript.
• Build modern React frontends to integrate AI into customer workflows.
• Architect cloud-native systems on AWS (Lambda, ECS/Fargate, API Gateway, DynamoDB).
• Implement microservices with strong operational controls for financial products.
• Uphold engineering best practices: clean code, automated testing, CI/CD.
• Diagnose production issues related to reliability, latency, and cost.
• Mentor engineers and collaborate with product teams to deliver features.

Skills

LLM/AI production

Node.js/TypeScript

React frontend

Prompt engineering

AWS cloud

Microservices

Observability

Tools

LangGraph

Langfuse

NestJS

AWS

API design

Job description

Key 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.

What We're Looking For

• Essential Experience Extensive software engineering background, building, deploying, and running production LLM/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,

Nice to Have Experience

• Experience with NestJS or similar backend frameworks.
• Familiarity with LangGraph, Langfuse, or other AI orchestration and observability tools.
• Knowledge of AI implementation in regulated/high-trust environments, ideally in financial services.
• Systematic evaluation design for LLM outputs and agentic workflows.
• Experience delivering agentic systems in production.

Aveni is redefining how financial institutions use AI. We build real, production-ready agentic systems that reshape how banks, advisers, and financial services firms operate, replacing fragmented processes with intelligent, end-to-end workflows. Our achievements include being recognised as Fintech of the Year for two consecutive years and winning Best Specialist Technology Service at the Professional Adviser Awards 2025. Backed by leading investors, including Puma Private Equity, and commercially supported by Lloyds Banking Group and Nationwide Building Society, we previously completed one of Scotland's largest Series A rounds. As the adoption of AI accelerates in financial services, we're scaling our team to meet growing demand.

The Role

We’re seeking a hands-on Senior AI Software Engineer with strong full-stack experience to build and ship AI-powered products into production, leveraging FinLLM (the UK's first LLM for Financial Services) and other LLMs. You won't build or train