Back End Developer

Mentor Talent Acquisition; Greater London; On-site; GBP 60,000 - 80,000; Full time

Benefits offered by this job

Private health insurance

Dinner when working late

Team off-sites

Job summary

Mentor Talent Acquisition is seeking a skilled backend engineer in Greater London. In this role, you will take ownership of backend systems that support AI-driven research workflows. You'll design scalable systems, integrate various platforms, and enhance internal tools. Ideal candidates have strong experience in Python or TypeScript, as well as familiarity with PostgreSQL and modern data platforms. Join a rapidly growing company with a vibrant startup culture, and enjoy perks like private health insurance and team off-sites.

Qualifications

• Strong experience owning backend systems end-to-end.
• Excellent skills in Python or TypeScript.
• Familiarity with PostgreSQL and platforms like Snowflake or BigQuery.

Responsibilities

• Design and scale backend systems for LLM workflows.
• Build data pipelines integrating product and CRM systems.
• Develop automation tools to enhance company efficiency.
• Own systems from architecture to production.
• Contribute to the engineering culture and technical direction.

Skills

Backend systems ownership

Python

TypeScript

PostgreSQL

Modern data platforms

Startup environment adaptability

Job description

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