Senior AI Software Engineer

About the role

Aveni is seeking a hands-on Senior AI Software Engineer to build and ship AI-powered products into production for the financial services sector. You will own features end-to-end, engineering the systems, services, interfaces, and integrations that leverage LLMs to create intelligent workflows for banking and advisory teams. This role involves working across the full stack, from backend microservices and cloud infrastructure to responsive frontend interfaces.

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.
• 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.
• Uphold engineering best practices including clean code, automated testing, and CI/CD.
• Mentor engineers and collaborate with product teams to deliver customer-ready features.

Required skills

• Node.js
• TypeScript
• React
• LLM integration
• Prompt engineering
• RAG
• Agentic workflows
• AWS
• Microservices
• Distributed systems
• API design

Nice to have

• NestJS
• LangGraph
• Langfuse
• Financial services domain knowledge

Qualifications

• Relevant degree or equivalent practical experience

Benefits

• 34 days holiday
• Birthday off
• Company-wide off-sites
• Personal Development Plan
• Flexible benefits platform
• Life Insurance
• Income Protection
• Critical Illness cover
• Pension
• Private health and dental care

About the Company

Aveni builds production-ready agentic systems for financial institutions, replacing fragmented processes with intelligent, end-to-end workflows. Recognised as Fintech of the Year for two consecutive years, the company is backed by leading investors and commercially supported by major financial institutions.