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.
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
Requirements
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
This role offers a clear path into Staff or Lead Engineer positions
- Drive architectural decisions across multiple teams
- Own complex, cross-cutting AI systems
Benefits at Aveni. What you’ll love:
- Remote-first working across the UK
- 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)
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