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Senior Engineer

arva ai • United Kingdom
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AI Summary

Build and iterate full-stack features for Arva AI's AI-powered anti-financial crime platform. Develop front-end, back-end, AI, devops, and MLops systems including prompt optimisation and model fine-tuning. Requires 4+ years of full-stack/product engineering experience with TypeScript, React, NodeJS, and AI/ML/computer vision.

Key Highlights
Senior Engineer role building full-stack features for an AI-powered anti-financial crime platform.
Work spans front-end, back-end, AI, devops, and MLops.
Includes prompt engineering, model fine-tuning, and custom model training.
Requires 4+ years of full-stack/product engineering experience plus AI/ML and computer vision experience.
Proficiency in TypeScript, React, and NodeJS is required.

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Key Responsibilities
Build and maintain full-stack product features across front-end, back-end, AI, devops and MLops.
Create systems that can improve over time based on feedback from humans in the loop, such as prompt optimisation and fine-tuning.
Explore applications of the latest developments of AI to enhance product features, explainability, speed and accuracy.
Build interfaces that clearly explain the decisions made by the system without overloading the user.
Build systems that can scale to large volumes of requests without sacrificing reliability.
Use the latest in LLMs, agents and computer vision to build systems that are faster, more thorough and more accurate than humans.
Ensure fast deployments and good CI/CD practices to maximise development velocity.
Develop and test prompts to optimise model performance and deliver high-quality outputs.
Adapt and fine-tune large language models and vision models for specific use cases.
Train and deploy bespoke AI models tailored to solve unique compliance challenges.
Work closely with the engineering and product teams to translate customer needs into actionable AI solutions.
Continuously iterate on AI systems to improve performance, reduce errors, and deliver value to customers.

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Technical Skills Required
TypeScript React NodeJS

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Benefits & Perks
Competitive salary and equity package
Bi-annual salary review
Yearly performance-based equity refresh
Work from anywhere in the world for 4 weeks a year
Regular team off-sites
Significant ownership and influence over the AI strategy

Job Description

Location: In person, London

Type: Full-Time

NB: We are able to sponsor visas

Arva AI is revolutionising financial crime intelligence with our cutting-edge AI Agents. By automating manual human review tasks, we enhance operational efficiency and help financial service providers onboard businesses more quickly while cutting operational costs by 80%.

As a Senior Engineer, you’ll play a pivotal role in building and iterating on full-stack features of our AI-powered anti-financial crime platform such as document fraud detection and web due diligence. You will also develop systems to automate the testing and improvement of our solution such as evals, prompt optimisation, and fine-tuning models.

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Job Overview
Posted Nov 08, 2026
Employment Full-time
Experience Mid-Senior level
Location United Kingdom
Category Programming
Company arva ai
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