[Hiring] Senior Software Engineer @Aveni

Role Description

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.
• Working at the intersection of platform engineering, AI/ML systems, and compliance-by-design architecture.
• Addressing high-stakes problems: making AI safe, auditable, and trustworthy in 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.

Qualifications

• 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.

Requirements

• 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.

Benefits

• 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.