Back End Developer

Company:  Mentor Talent Acquisition
Location: London
Closing Date: 06/07/2026
Hours: Full Time
Type: Permanent

Job Description

London (Farringdon)


We’re building LLM-powered workflow tools to support investment research for private market investors, used by leading private equity and consulting firms globally. The company is profitable, bootstrapped, and growing quickly, with a team of 30+ across London, NYC, and Sydney.

The Role

This is a high-ownership backend engineering role focused on building and scaling systems that power an AI-driven research platform.

You’ll work across backend systems, data pipelines, integrations, and internal infrastructure — partnering closely with product, commercial, and operations teams to automate workflows and improve decision-making.


What You’ll Do

  • Design and scale backend systems supporting LLM workflows, vector search, and orchestration
  • Build data pipelines and internal platforms integrating product, CRM, and financial systems
  • Develop automation and internal tooling to improve company efficiency
  • Own systems end-to-end — from architecture to production
  • Contribute to engineering culture and technical direction


Example Projects

  • Customer Health System: unify product usage, CRM, and feedback into actionable insights
  • User Feedback Pipeline: process calls with LLMs to extract themes and product insights
  • Billing Infrastructure: build systems for complex B2B pricing and automated invoicing
  • Internal Data Platform: create reliable pipelines and APIs for reporting and operations


About You

  • Based in London (or willing to relocate)
  • Experience owning backend systems end-to-end
  • Strong in Python or TypeScript
  • Strong PostgreSQL and familiarity with modern data platforms (Snowflake, BigQuery, etc.)
  • Comfortable working in fast-moving startup environments
  • Enjoy translating business problems into scalable technical systems


Nice to Have

  • Experience with AI/LLM workflows or internal platforms


Benefits

  • Private health insurance
  • Gym membership
  • Dinner when working late
  • Team off-sites



For more info or to apply, please share your CV to [email protected].

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Mentor Talent Acquisition
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