Founding Head of Financial Services in London

Location: London; 4 days in-office, 1 day wfh

Reports to: Chief Commercial Officer

Cosine is the UK's frontier AI lab for autonomous software engineering. We build our agent tooling entirely in-house and post-train open-source models to deliver reliable, enterprise-grade coding performance in security-critical settings. Our offerings can be used as SaaS, deployed on VPC, on-prem or fully air-gapped. Through this flexibility, we are able to service large-scale, highly regulated enterprises and industries including defence, financial services and healthcare.

Mission

Own Cosine’s financial services engagement and GTM motion from founder-led relationship building into a repeatable commercial engine. The role exists to turn Cosine’s current sovereign AI momentum with banks, insurers, market infrastructure firms, payments companies, and other regulated financial institutions into deep executive relationships, clearly understood customer priorities, and qualified commercial opportunities. This is a critical sector-building role: part enterprise sales, part partnerships, part market development, part community-building, and part GTM leadership.

Core responsibilities

• Lead engagement with financial services coalition partners and target enterprises
• Build multi-threaded senior relationships
• Build Cosine’s understanding of FS sovereign AI priorities
• Build towards commercial opportunities
• Organise joint events and relationship-building forums
• Help build the GTM team in financial services

What good looks like in the first 6 months

• Multi-threaded relationships established across the most important accounts.
• A structured view of FS sovereign AI use cases, buyer priorities, objections, and buying triggers.
• Qualified opportunities progressing into discovery, technical deep-dives, pilots, or commercial proposals.
• A clear FS GTM playbook that future hires can build from.

Success metrics

• Number of priority FS accounts actively engaged.
• Number of senior stakeholder relationships built across target accounts.
• Quality of customer insight captured on sovereign AI priorities, deployment requirements, and use cases.
• Qualified FS opportunities created.

Cosine’s responsibilities

• Founder access for senior meetings and strategic accounts.
• Existing coalition relationships and warm routes into relevant FS organisations.
• Support from partnerships, marketing, product, engineering, ML, and legal where needed.

Candidate profile

This role is likely to suit someone who:

• Has sold, partnered, or built relationships inside financial services.
• Can credibly engage senior stakeholders while still doing the account-by-account follow-up work themselves.
• Understands complex enterprise buying cycles and knows how to move from relationship to qualified opportunity.
• Is comfortable with ambiguity, sector-building, and founder-led GTM.

Summary

The Founding Head of Financial Services should make Cosine impossible to ignore for the right FS organisations. They should understand what these institutions actually need from sovereign AI, build the relationships required to be taken seriously, create the forums where those conversations happen, and turn that trust into qualified commercial opportunities.

Why join Cosine

• Opportunity to sell a genuinely differentiated product into mission-critical defence and national security environments
• Meaningful early equity with real upside
• Direct impact on product direction and go-to-market strategy
• Small, elite team with high standards and strong technical depth

Equal Opportunity

We’re an equal opportunity employer. We value diverse backgrounds and encourage applications from everyone who meets the role requirements, even if you don’t tick every box.