Job Description : London | Full-Time | Senior Engineer

Permutable Technologies is a fast-growing AI company helping the world’s leading financial institutions make smarter decisions through real-time market intelligence and LLM-driven news analytics. We’re entering a critical scale-up phase and are hiring a Senior Engineer to work alongside a talented engineering team, helping us scale product, systems, and team maturity.

This role is for someone who has been through scale-up before and understands how to partner with platform leadership while remaining deeply hands-on. You’ll help turn strong commercial momentum into a robust, scalable engineering foundation.

What You’ll Be Doing

• Work in close partnership with the Head of Platform to execute on platform strategy and delivery
• Own and deliver key parts of our core product stack, including real-time APIs, data pipelines, and ML/LLM-powered analytics
• Act as a senior technical leader within the team—mentoring engineers and setting engineering standards
• Support customer-facing rollouts with Product and Commercial teams, ensuring production reliability
• Help improve engineering processes, observability, and system resilience as we scale
• Stay hands-on while helping the platform function operate more effectively

What You Bring

• Senior engineering with majority experience in a scale-up or fast-growing start-up
• Strong backend or platform engineering background (data-intensive systems a plus)
• Comfortable working alongside a platform lead, contributing to architecture and execution
• Experience mentoring engineers and leading by example
• Pragmatic decision-maker who balances speed with robustness
• Bonus: exposure to LLM, Transformers or financial/market data products

Tech We Work With

• Python, React, JavaScript
• AWS, Docker, Pulumi, Postgres
• Agile
• Transformer building, LLMs, time-series models
• Real-time data pipelines & scalable APIs

Why Join Permutable?

• A wide network of established institutional clients
• Frontier AI used in financial and commodities markets
• Small team, high trust, low bureaucracy
• Clear ownership and influence without management overhead
• Opportunity to grow into staff / principal responsibilities as we scale

Industry: Business Intelligence Platforms

• Employment Type: Full-time