Senior Software Engineer

Aveni; Remote; GBP 50,000 - 70,000; Full time

Job summary

A leading financial technology company in the UK is seeking a Software Engineer to develop AI-driven solutions for the financial services sector. In this role, you will design and build robust microservices, collaborate with product teams, and work with cloud technologies like AWS. You’ll be part of a dynamic team that values innovation, diversity, and continuous learning. The position offers flexible working arrangements and numerous professional development opportunities within a supportive workplace culture.

Benefits

34 days holiday plus your birthday off

Remote and flexible working

Career growth opportunities

Private health care

Pension scheme with employer contribution

Qualifications

• Experience building production systems using Node.js / TypeScript.
• Hands-on experience developing UIs with React.
• Solid understanding of cloud-native engineering on AWS.
• Proactive attitude and motivation to build and iterate quickly.

Responsibilities

• Design and implement event-driven microservices and APIs.
• Build scalable systems on AWS.
• Integrate LLM-powered capabilities into workflows.
• Collaborate with product and AI specialists.

Skills

Node.js / TypeScript

React

AWS

Microservices

Clean code

AI development

Job description

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.

We have been recognised as Fintech of the Year for two consecutive years and awarded 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. Since then, we’ve continued to grow rapidly as adoption of AI in financial services accelerates, and we’re now scaling our engineering organisation to meet that demand.

Our engineering team includes experienced software engineers and PhD-level AI specialists, with strong ties to the University of Edinburgh, giving you access to exceptional expertise and opportunities for continuous learning as part of the day-to-day work.

The Role

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

• 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.