Technical GTM Lead

Job title:
Technical GTM Lead

Location: London; full in-office working as default

Start date: ASAP

Reports to: CRO

Compensation: Salary and Equity options available for discussion

Final date to receive applications: 01/11/26 at 23:59 UK time

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Cosine is a UK AI lab building models, applications and training infrastructure for mission-critical organisations.

We build coding agents that work across real software systems, specialised Lumen models, AI-native security products and the infrastructure needed to deploy advanced AI in demanding environments. Our customers include some of the world’s largest enterprises, including organisations operating behind strict security, regulatory and technical constraints.

We’re also training Lumen Sovereign, the first frontier large language model trained in the UK, with the support of the UK Government.

We’re now looking for a Technical GTM Lead to become the technical centre of gravity for our go-to-market team.

You’ll sit at the intersection of customers, sales, product, engineering and machine learning. You’ll show prospective customers what Cosine can do, help existing customers get deployed, build the technical assets that make our products compelling, and ensure what we learn in the field directly improves what we build.

This is not a traditional solutions consultant role. It is highly hands‑on. One day you may be running a technical evaluation with an enterprise engineering team; the next you may be debugging a deployment, building a demonstration environment, writing a technical blog or working with ML researchers to turn a new capability into something customers can understand and use.

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• Lead technical demonstrations and evaluations for prospective enterprise customers.
• Understand a customer’s development environment, architecture, security model and constraints, then tailor the conversation accordingly.
• Explain Cosine’s products, models, integrations, deployment options and security considerations with accuracy and confidence.
• Design and run technical evaluations, pilots and proofs of concept.
• Work alongside the commercial team to help turn technical interest into customer momentum.

• Create high-quality demo environments that show Cosine at its best.
• Build reusable repositories, workflows and customer scenarios across our coding agent, desktop application and Sparklr model‑training platform.
• Develop technical materials that help the wider GTM team explain, demonstrate and position Cosine effectively.
• Work with Product, Engineering and ML to turn new capabilities into compelling customer‑facing demonstrations.
• Create technical content such as blogs, product pages, webinars and enablement materials.

• Own the technical side of customer onboarding, from initial architecture conversations through to a working deployment.
• Help customers integrate Cosine with their existing repositories, development environments, infrastructure and enterprise systems.
• Support deployments across cloud, VPC, on‑premise and other controlled environments.
• Troubleshoot issues directly and coordinate with Engineering when deeper product support is required.
• Lead onboarding sessions and become a trusted technical counterpart for customer engineering, platform, security and AI teams.

• Act as the primary technical bridge between GTM and Cosine’s Product, Engineering and ML teams.
• Bring structured customer feedback into the product organisation,…