Founding Solutions Engineer - (Enterprise) in Harrow

Location: London; full in-office working as default

Start date: ASAP

Reports to: CTO, with dotted line to CRO and CEO

Compensation: £60k–£90k base (potential to go higher depending on experience) plus equity

At Cosine, we’re building autonomous AI engineers that plan, write, and ship code inside real development workflows. Cosine is designed for on-premise and virtual private cloud (VPC) deployments, including fully air-gapped environments. 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.

This role is based in our Hoxton office, five days a week, because close collaboration, fast feedback, and shared context matter for the problems we’re solving.

The role at Cosine focuses on making our technology legible, credible, and evaluable to sophisticated engineering teams. This role sits at the intersection of:

• Deep technical understanding (agents, ML systems, evals, infrastructure)
• Enterprise-facing technical communication
• Hands-on support for real-world evaluations and pilots

What You’ll Do:

• Support enterprise evaluations and pilots (core responsibility)
• Act as a technical counterpart to enterprise engineering teams during evaluations, pilots, and early deployments
• Join architecture reviews, technical deep dives, and security-focused conversations
• Explain how Cosine works in practice: its agent architecture, training approach, evaluation methods, and operational constraints
• Help teams understand where Cosine excels, where it currently has limits, and how to evaluate it responsibly
• Identify repeated technical objections, points of confusion, and failure modes encountered during real-world evaluations
• Create best-in-class technical content (informed by reality)
• Produce long-form technical explainers grounded in real evaluation learnings
• Translate research-level concepts into content that CTOs, Staff+ engineers, and technical evaluators can reason about
• Create clear diagrams, walkthroughs, and examples that help engineers form accurate mental models
• Produce high-quality video content where it meaningfully increases clarity or trust
• Own Cosine’s technical narrative (enterprise-first)
• Maintain a consistent voice that emphasises credibility, honesty, and depth, especially for regulated enterprises
• Capture and feed back real-world technical insights
• Share structured feedback with product, research, and engineering teams
• Produce early technical case studies and evaluation write-ups

How Success Will Be Measured (first 6–12 Months):

• Enterprise engineers can accurately explain Cosine’s architecture, evaluation approach, and differentiation after engaging with Cosine.
• Technical objections during evaluations become clearer, fewer, and more repeatable over time.
• Prospective customers report increased confidence in evaluating Cosine safely.
• Insights from enterprise evaluations directly inform product decisions, documentation, and evaluation strategy.
• Sales and leadership rely on this role as a trusted technical voice in high-stakes conversations.

You’ll Thrive Here If You:

• Have deep technical credibility: you’ve worked as a software engineer, ML engineer, or in a highly technical role
• Are fluent in modern ML and agentic systems
• Can engage directly with senior engineers and architects at large enterprises
• Enjoy being close to the action: joining pilots, and technical deep dives
• Can independently investigate a technical topic and turn that understanding into clear explanations
• Are obsessed with clarity and accurate mental models
• Are energised by working closely with a research-driven engineering team
• Want autonomy and ownership, and are excited by shaping a function from first principles
• Experience producing polished technical demos, walkthroughs, or explanatory videos is a plus

Cosine is an equal opportunity employer. We value diverse backgrounds, perspectives, and ways of thinking, and we’re committed to creating an inclusive and respectful workplace.

Compensation, Benefits & Ways Of Working:

• Competitive salary, benchmarked to the market
• Equity / share options
• 30 days’ holiday + bank holidays
• Genuine 9–5 working hours
• Dog-friendly office
• Daily lunch provided
• Monthly team breakfasts and socials
• Pension
• High-quality equipment to do your best work

This role won’t suit everyone. But if you want structure, clarity, strong collaboration, and a team that takes both the work and work-life balance seriously, it’s a great place to be.