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Job title: Founding Outbound SDR

Location: London

Start date: ASAP

Reports to: CRO

Compensation: £40k–£65k (£30–£45k base + £10–£20k bonus) plus equity

Cosine at a glance

• 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 makes us unique is our in-house ML research lab that post-trains LLMs (e.g. GPT-5, gpt-oss, Kimi) on proprietary software-engineering reasoning data to dramatically increase their coding accuracy. In 2024 this gave us a state-of-the-art score of 72% on OpenAI’s SWE-Lancer benchmark
• Cosine is now the only available managed product that can be fully air-gapped and deployed on premises, exciting many bulge bracket but extremely risk sensitive and strict enterprises that have rejected all other solutions on the market. We've got our first pilots up and running with global investment banks and defence primes and are now looking to scale our GTM function

The role

You’ll build Cosine’s outbound motion from zero to one, embedding agentic processes from the very start: define ICPs, craft sequences, book meetings with senior engineering leaders, and convert them into SAOs that become our first flagship customers.

Your responsibilities:

• Prospect & research: Build high‑quality target lists across priority verticals (FS, Defence, Gov, advanced manufacturing) and personas (CTO, VP Engineering, Head of AI innovation)
• Run sequences: Design multi‑touch, multi‑channel outreach (email, LinkedIn, calls) with crisp, technical‑aware messaging, and harnessing AI and outsourced partners
• First‑call qualification: Hold initial conversations to confirm fit