Senior Software Engineer

Senior / Staff Software Engineer — AI Platform

New York City | Full-time | On-site, five days per week

Build the engineering foundations of an AI business with substantial venture backing, paying customers and a large market to pursue.

Our client is an early-stage company developing AI software to automate complex financial operations. Backed by established venture investors and experienced technology and finance leaders, the business has secured multi-million-dollar funding and already generates millions in annual recurring revenue.

The opportunity is to turn that early commercial traction into a platform capable of supporting much broader adoption—and help shape the architecture that gets it there.

The opportunity

You’ll own foundational systems used across the engineering team: agent infrastructure, orchestration, data services and the tooling needed to operate AI reliably in production.

This is a hands-on role with meaningful architectural influence. You’ll work directly with founders and customers, translate difficult operational problems into reusable software, and see your decisions become part of the company’s core platform.

What you’ll build

• Agent frameworks, orchestration, verification and observability systems.
• Data infrastructure that brings fragmented financial information into a reliable, consistent foundation.
• Shared platform services and developer tools that help other engineers ship faster.
• End-to-end product capabilities, extending into the frontend when needed.

What we’re looking for

• Strong Python backend or platform engineering experience, with a track record of building core infrastructure at scale.
• Deep understanding of distributed systems and data infrastructure.
• Personal ownership of a significant engineering project spanning teams and running successfully in production.
• Confidence making architectural decisions with incomplete information and taking them through to delivery.
• Ability to work across TypeScript and React when required, and communicate directly with customers.
• Fluency with AI coding tools such as Cursor or Claude Code.
• A Computer Science degree, or a related technical degree with substantial CS content, from a leading US computer science programme.

Early-stage startup experience and exposure to financial systems, enterprise integrations or payments would be valuable.

Stack: Python, TypeScript, React and AWS.

Location: New York City, five days per week in the office.

Visa support: OPT, H-1B transfers and H-1B sponsorship available.

Apply to discuss the company, its backing and the scope of the role in confidence.