Senior Software Engineer

Senior Backend Software Engineer | AI Products

Location: London (Hybrid)

Defining how AI and finance work together, securely, intelligently, and at scale.

We're partnered with a fast-growing AI company building a highly secure Generative AI platform for the financial services sector. By combining LLMs, agentic AI and intelligent automation, they're helping some of the world's leading financial institutions unlock efficiency, improve decision-making and reduce risk.

As they continue to scale, they're looking for a Senior Backend Software Engineer to help build and evolve the backend systems that power their AI platform.

You'll work on scalable APIs, distributed systems, asynchronous workflows and real-time services, helping to deliver production-grade AI capabilities into enterprise environments. This is a hands-on engineering role where you'll work closely with product and engineering teams, influence technical direction and contribute to building software used by global financial organisations.

What you'll be doing

• Building and scaling backend services using TypeScript, Node.js and NestJS
• Designing and maintaining APIs, data models and distributed systems
• Working with PostgreSQL and multi-tenant SaaS architectures
• Building event-driven workflows and asynchronous processing pipelines
• Supporting AI-powered product capabilities and backend integrations
• Contributing to system design, architecture decisions and engineering best practices
• Mentoring engineers and helping drive a strong engineering culture

What we're looking for

• Strong commercial experience with TypeScript and Node.js
• Experience working with NestJS or similar backend frameworks
• Strong backend engineering and system design skills
• Experience building production SaaS platforms
• Strong PostgreSQL and database design knowledge
• Exposure to distributed systems, event-driven architectures or messaging technologies
• Interest or experience working with AI, LLM-powered products or modern AI platforms

Why join?

💪 Join a market-leading business operating at the forefront of Generative AI

🚀 Work on innovative products helping leading financial institutions operationalise AI at scale

🧠 High levels of ownership and autonomy, with a focus on outcomes and clean engineering

🔄 Continuous learning environment where experimentation and curiosity are encouraged

🌿 Collaborative, transparent culture with flat structures and a people-first approach

💻 Hybrid working – London office