Senior Software Engineer, Python

Aveni

Senior Software Engineer at Aveni developing AI solutions for financial institutions. Focus on Python services, AWS architecture, and regulatory compliance in financial sectors.

Posted 4/27/2026full-timeRemote • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

AWSCloudDynamoDBJavaScriptNode.jsPythonTerraformTypeScript

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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
Experience with AI safety, guardrails, or policy enforcement (Nice to Have)
Background in agentic systems or autonomous workflows (Nice to Have)
Experience in financial services or regulated environments (Nice to Have)
Familiarity with Node.js / TypeScript, Terraform or CDK (Nice to Have)
Knowledge of observability tools and ML fundamentals (Nice to Have)

Benefits

Comp & perks

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

ATS Keywords

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Hard Skills & Tools

Pythoncloud-native systemsAWSAPIsasync systemsscalable architectureAI/ML systemsobservability toolsAI safetyagentic systems

Soft Skills

ownershipcollaborationmentoringleadershipdocumentationknowledge sharingsprint planningestimationdeliverybest practices