Senior Full-Stack Product Engineer

Location: In person, London Type: Full-Time NB: We are able to sponsor visas Note on Salary: For exceptional candidates with strong product impact and relevant experience, we are open to offering compensation above the specified range. 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 Full-Stack Product 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. About the Role As a Senior Full-Stack Product Engineer, you will: 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 our product features, explainability, speed and accuracy. What You’ll Do Front-end: Build interfaces that clearly explain the decisions made by our system without overloading the user. Back-end: Build systems that can scale to large volumes of requests without sacrificing reliability. AI: Use the latest in LLMs, agents and computer vision to build systems that are faster, more thorough and more accurate than humans. Devops: Ensure that we maintain fast deployments and good CI/CD practices to maximise development velocity. Prompt Engineering: Develop and test prompts to optimise model performance and deliver high-quality outputs. Model Fine-Tuning: Adapt and fine-tune large language models and vision models for specific use cases. Custom Model Training: Train and deploy bespoke AI models tailored to solve unique compliance challenges. Collaboration: Work closely with the engineering and product teams to translate customer needs into actionable AI solutions. Iterate: Continuously iterate on our AI systems to improve performance, reduce errors, and deliver value to customers. Our Culture Deliver Value Fast Speed starts with clarity. We first understand what value actually means, for the customer, the business, or the system, and then take the shortest credible path to delivering it. We move quickly without cutting corners on quality, security, or trust. Outcome Obsessed We obsess over details and take full ownership of wider outcomes, not just tasks. We think like the user, execute with rigor, and validate that every detail works in real conditions. If something falls short, we fix it properly and prevent recurrence, always raising the bar. Relentless Urgency We move with urgency because time matters. We prioritise what truly moves the outcome, make decisions with imperfect information, and act decisively. Urgency means focus, momentum, and driving meaningful progress without unnecessary delay. What We’re Looking For Experience: 4+ years in a full stack / product engineering role, as well as experience using AI/ML and computer vision. Technical Expertise: Proficient in TypeScript, React and NodeJS, and with good product intuition. AI Skills: Hands-on experience with prompt engineering, fine-tuning pre-trained models, and training custom models, including vision models. Product Mindset: Strong understanding of how AI can solve real-world problems, with a focus on customer needs. Interests: Ability to stay updated with the latest advancements in AI and apply them effectively. Collaboration: Excellent communication skills to work across teams and explain complex AI concepts to non-technical stakeholders. Ownership: A proactive, problem-solving mindset with the ability to take full responsibility for projects and outcomes. Growth-Oriented: Excited to learn new skills, tackle challenges, and adapt as the company scales. Why Join Us? Be part of an early-stage startup with significant ownership and influence over the AI strategy. Work on cutting-edge AI technologies that transform how businesses operate. Collaborate with a passionate, mission-driven team dedicated to innovation. Work from anywhere in the world for 4 weeks a year, in addition to regular team off-sites. Competitive salary and equity package, with bi-annual salary review and yearly performance based equity refresh. Ready to Build the Future of AI Powered Anti- Financial Crime? If you’re excited to shape the future of compliance with state-of-the-art AI solutions, we’d love to hear from you. Apply now to become an Arvanaut as our Full-Stack Product Engineer. About Arva AI 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 institutions handle AML, KYB and KYC reviews, cutting costs by 80%.