At a Glance
- Tasks: Build next-gen AI systems for financial services, focusing on safety and compliance.
- Company: Aveni, a leading AI FinTech recognised for innovation and excellence.
- Benefits: Remote-first work, 34 days holiday, flexible benefits, and personal development opportunities.
- Other info: Inclusive culture with clear career growth paths and mentorship opportunities.
- Why this job: Join a dynamic team shaping the future of AI in finance and make a real impact.
- Qualifications: Strong Python skills, AWS experience, and a passion for AI and compliance.
The predicted salary is between 60000 - 80000 € per year.
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
Aveni is building next-generation AI systems for UK financial services, where safety, compliance, and trust are non-negotiable. We're hiring a Senior Software Engineer to work on AI and agentic platform capabilities that power intelligent, automated workflows for financial services. This is a high-impact role building foundational technology that underpins Aveni's AI-first strategy.
Your work will focus on:
- Systems that govern how AI agents behave in regulated financial contexts, designing and implementing policy enforcement, safety controls, behavioural monitoring, and evaluation frameworks.
- Joining at a pivotal moment as Aveni scales from startup to enterprise-grade AI FinTech, working on problems that matter: making AI safe, auditable, and trustworthy in high-stakes financial environments.
What You’ll Be Doing
- Build Production-Grade Systems
- Design and implement scalable Python services powering AI-driven workflows
- Develop resilient, observable systems with strong error handling and compliance traceability
- Work within a serverless, event-driven AWS architecture
- Own Delivery End-to-End
- Take ownership of features from design through to production
- Collaborate with Product, AI Platform, and Compliance teams
- Contribute to sprint planning, estimation, and delivery
- Shape AI & Agentic Systems
- Build intelligent workflows using LLMs and agentic architectures
- Integrate AI models into production systems
- Design guardrails, policy enforcement, and behavioural monitoring for AI agents
- Mentor & Elevate the Team
- Support and guide junior and mid-level engineers
- Lead code reviews and promote engineering best practices
- Contribute to documentation, demos, and knowledge sharing
- Drive AI-Augmented Engineering
- Use AI coding tools to accelerate development and improve quality
- Help define best practices for AI-assisted software engineering
What We’re Looking For
- Must Have
- Strong Python expertise in production environments
- Experience building cloud-native systems on AWS (Lambda, DynamoDB, S3, EventBridge)
- Experience working with LLMs or AI/ML systems
- Strong understanding of APIs, async systems, and scalable architecture
- Nice to Have
- Experience with AI safety, guardrails, or policy enforcement
- Background in agentic systems or autonomous workflows
- Experience in financial services or regulated environments
- Familiarity with Node.js / TypeScript, Terraform or CDK
- Knowledge of observability tools and ML fundamentals
You’ll Thrive If You Are
- Pragmatic and able to balance speed with long-term quality
- Curious about AI, especially safety and responsible usage
- Comfortable working in a fast-moving scale-up environment
- A strong communicator who can explain complex ideas clearly
- Passionate about mentoring and raising team standards
Career Growth
This role offers a clear path into Staff or Lead Engineer positions, where you’ll:
- Drive architectural decisions across multiple teams
- Own complex, cross-cutting AI systems
- Shape Aveni’s long-term AI platform strategy
Join Us in Making a Difference
At Aveni, we believe that diversity drives innovation. We’ve built our business to ensure an inclusive workplace where everyone feels valued and empowered to contribute their best work. If you’re passionate about technology and its ability to drive positive change for the future of financial services, we’d love to hear from you. Even if you don’t meet 100% of requirements, we’d like to hear from you anyway if you believe you’d fit in. Apply now to join us on our mission to transform the financial services industry through AI.
Benefits at Aveni. What you’ll love:
- Remote-first working across the UK
- Work abroad policy
- Co-working spaces available
- 34 days holiday (including flexible bank holidays) and your birthday off
- Company-wide off-sites
- Optional Personal Development Plan
- Flexible benefits platform
- Protection essentials including Life Insurance, Income Protection, Critical Illness cover, and Pension (up to 5% matched employer contribution with optional increased contributions)
- Private health and dental care
- Potential share options
- Enhanced family leave
Senior Software Engineer (Python) in Guildford employer: Aveni
Aveni is an exceptional employer, offering a dynamic and inclusive work culture that prioritises innovation and employee growth. With a remote-first approach and access to co-working spaces across the UK, employees enjoy a healthy work-life balance alongside generous benefits such as 34 days of holiday, personal development plans, and comprehensive health coverage. Joining Aveni means being part of a rapidly scaling FinTech that values diversity and empowers its team to make a meaningful impact in the financial services industry through cutting-edge AI technology.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Software Engineer (Python) in Guildford
✨Tip Number 1
Network like a pro! Reach out to people in the industry, especially those at Aveni or similar companies. Use LinkedIn to connect and engage with them; you never know who might refer you for that Senior Software Engineer role!
✨Tip Number 2
Show off your skills! Prepare a portfolio or GitHub repository showcasing your Python projects, especially those involving AI or cloud-native systems. This will give you an edge during interviews and demonstrate your hands-on experience.
✨Tip Number 3
Ace the interview by being ready to discuss real-world problems. Think about how you would design scalable systems or implement safety controls in AI. Practise explaining your thought process clearly, as communication is key in a collaborative environment.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining Aveni and being part of our mission to transform financial services with AI.
We think you need these skills to ace Senior Software Engineer (Python) in Guildford
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that align with the Senior Software Engineer role. Highlight your Python expertise, cloud-native systems experience, and any work with AI/ML systems to catch our eye!
Craft a Compelling Cover Letter:Use your cover letter to tell us why you're excited about Aveni and how you can contribute to our mission. Share specific examples of your past work that demonstrate your ability to build production-grade systems and mentor others.
Showcase Your Projects:If you've worked on relevant projects, whether in a professional or personal capacity, make sure to mention them. We love seeing real-world applications of your skills, especially if they involve AI safety or compliance.
Apply Through Our Website:We encourage you to apply directly through our website for the best chance of getting noticed. It’s the easiest way for us to keep track of your application and ensure it reaches the right people!
How to prepare for a job interview at Aveni
✨Know Your Python Inside Out
Make sure you brush up on your Python skills, especially in production environments. Be ready to discuss your past projects and how you've implemented scalable Python services, as this will be crucial for the role.
✨Familiarise Yourself with AWS
Since the role involves working within a serverless, event-driven AWS architecture, it’s essential to understand AWS services like Lambda, DynamoDB, and S3. Prepare to talk about your experience with these tools and how you've used them in previous projects.
✨Understand AI Safety and Compliance
Given Aveni's focus on AI safety and compliance, make sure you can articulate your understanding of policy enforcement and behavioural monitoring in AI systems. Think of examples where you've had to consider compliance in your engineering work.
✨Show Your Mentorship Skills
Aveni values team collaboration and mentorship, so be prepared to share experiences where you've guided junior engineers or contributed to code reviews. Highlight your passion for raising team standards and fostering a collaborative environment.
