As a Software Engineer at Aveni, you’ll be responsible for building and scaling the products that sit on top of FinLLM (the UK's first LLM for the Financial Services industry) and other LLMs, enabling financial institutions to adopt AI safely and effectively.

You won’t be expected to build or train the LLMs themselves, instead you’ll be engineering the platforms, services, user interfaces and integrations that bring those models to life in the hands of advisers, analysts and banking teams.

Your work will focus on:

• Designing and implementing robust event-driven microservices and APIs
• Building scalable, cloud-native systems on AWS
• Developing modern, responsive React front-ends
• Integrating LLM-powered capabilities into real-world workflows
• Collaborating closely with product and AI specialists to turn ideas into reliable, customer-ready features

What you’ll be working with

You should be comfortable with most of our core technologies:

• Node.js and TypeScript
• React and modern front-end tooling
• AWS (e.g., Lambda, ECS/Fargate, API Gateway, SQS/SNS, DynamoDB, RDS)
• NestJS or equivalent back-end frameworks
• Microservices and event-driven architectures

We also actively embrace AI coding assistants (such as Claude Code) to speed up development, improve code quality and reduce repetitive work — and we encourage engineers to use these tools effectively.

What we’re looking for:

• Experience building production systems using Node.js / TypeScript
• Hands-on experience developing UIs with React
• Solid understanding of cloud-native engineering on AWS
• Experience with microservices, messaging patterns and distributed systems
• A commitment to clean code, testing, observability and operational excellence
• A proactive and motivated mindset — someone who wants to build, ship and iterate quickly
• Interest in AI-powered products and a drive to learn

Join Us in Making a Difference

At Aveni, we believe that diversity drives innovation. We're committed to building a team that reflects the diverse communities we serve and creating an inclusive workplace where everyone feels valued and empowered to contribute their best work. If you're passionate about leveraging technology to drive positive change and want to be part of a team that's shaping the future of financial services, we'd love to hear from you. We know that some people are likely to only apply where they meet 100% of requirements, but we’d like to hear from you anyway. Apply now to join us on our mission to transform the financial services industry through AI!

What we offer:

• A collaborative and innovative work environment
• Career growth opportunities towards Technical Lead and beyond
• Exposure to cutting-edge AI-first engineering practices
• 34 days holiday plus your birthday off
• Share options
• Remote and flexible working
• Life insurance
• Income protection
• Private health care
• Eyecare
• On-going career development and training
• Freebies and discounts
• Emotional wellbeing (Employee assistance programme provides access to 24/7 employee counseling and emotional support)
• Cycle to work scheme
• Pension scheme (employer contribution matched up to 5%)

We’re a remote-first company across the UK, with regular off-sites and in-person gatherings that are always fun, motivating and team-focused.

If you want to build high-impact technology at the frontier of applied AI and help bring new products and intelligent agents to market, you’ll thrive here.