Join Cosine.sh as our founding Partnerships Manager to scale our SI and reseller ecosystem. You will deepen relationships with partners like EY and Deloitte, driving commercial opportunities within regulated sectors. Reporting to the Head of Partnerships, you’ll own the full lifecycle—from outreach to closing—delivering $1M+ in partner-sourced revenue during your first year.
Partnerships Manager at Cosine.sh
As the founding Partnerships Manager at Cosine.sh, a $15 million YC W23 AI lab building autonomous software-engineering agents, you will scale an elite partner ecosystem including EY and Deloitte to drive $1M+ in revenue within mission-critical sectors like defense and national security. This London-based role provides the unique opportunity to work alongside the co-founders to navigate complex air-gapped deployments and rigorous security reviews, making it the perfect move for a technically fluent leader with the zero-to-one hustle required to build a world-class channel from scratch in the rapidly accelerating field of enterprise AI.
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Location
London, United Kingdom
Compensation
£100k-£140k + Equity
Company
Cosine
Role overview
Software
Cosine is an autonomous, on-premise coding agent post-trained on human reasoning data to deliver unmatched software-engineering accuracy, security, and speed for regulated enterprises.
What you will do
- Own the day-to-day relationship management and outreach for system integrators and boutique consultancies serving financial services, defense, and government sectors.
- Structure complex partnership agreements and execute joint go-to-market motions to secure 5+ revenue-generating partnerships within your first three months.
- Collaborate with technical leads at SIs to navigate architecture-level integrations, security reviews, and air-gapped deployment models for enterprise clients.
Who this is a fit for
- Proven track record in SI or boutique consultancy partnerships, having delivered significant partner-sourced revenue at a venture-backed startup or top-tier enterprise vendor.
- Deep familiarity with regulated industries such as financial services or defense, including navigating complex procurement processes and rigorous security/compliance requirements.
- Technically fluent and comfortable discussing on-premise architecture, security models, and API integrations with senior technical stakeholders and partner leads.
Why this role is remarkable
- Build from zero to one with a YC W23 lab backed by $15 million in funding to revolutionize software engineering in high-stakes regulated environments.
- Directly influence the growth of a partner ecosystem that already includes titans like EY, Deloitte, and Cognizant, turning established relationships into massive revenue streams.
- Work in a high-autonomy environment alongside the CCO and co-founders, shaping the go-to-market strategy for cutting-edge, air-gapped AI deployments.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
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What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Cosine wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.