Senior Software Engineer

Senior Software Engineer // London hybrid // Fintech // £120,000

Want to take ownership of greenfield AI projects in a growing fintech?

You'll be joining a growing London fintech building data and analytics technology for hedge funds, asset managers and professional credit investors.

They've built their reputation around high-quality financial data and are now pushing further into AI, LLMs and agent-based products. With an engineering team of around 14 people, you'll have the chance to work on greenfield technology, influence how new products are built and have a genuine impact without getting lost in a huge engineering organisation.

You’ll take projects from idea to production, designing the architecture, making technical decisions, writing the code and leading delivery.

You'll be working across Node.js, Python and AWS, taking ownership of:

• Designing architecture and making key technical decisions
• Building greenfield AI and LLM-powered features
• Writing production code across Node.js and Python
• Working with AWS and Infrastructure as Code
• Designing and developing databases, particularly PostgreSQL
• Technically leading other engineers through delivery

This isn't a people-management role. You'll stay close to the code while having significant technical and architectural ownership.

• Strong AWS knowledge
• Architecture and technical leadership experience
• Previous experience within finance or financial services
• Practical experience building AI/LLM features into products
• Database experience, ideally PostgreSQL
• DynamoDB and Elasticsearch are a bonus

• 2 days per week in central London
• Greenfield AI and agent-based projects
• 25 days holiday + bank holidays
• Health insurance and pension
• Choice of high-quality tech kit
• Learning and development

If you want to stay hands-on, solve complex engineering problems and help shape new AI-powered products, this is an opportunity to do it in a growing fintech where your work will have real impact.