Senior Engineer

permutable.ai; Greater London; On-site; GBP 100,000 - 125,000; Full time

Job summary

A rapidly growing AI firm in the United Kingdom seeks a Senior Engineer to play a key role in scaling product and systems. You will work closely with the Head of Platform to deliver vital parts of the core product stack, including real-time APIs and data pipelines. The ideal candidate has senior engineering experience in a scale-up environment and excels in mentoring engineers. This role offers an opportunity to influence the engineering foundation while staying hands-on.

Benefits

Opportunity to grow into staff/principal responsibilities

Small team with high trust and low bureaucracy

Qualifications

• Experience in a scale-up or fast-growing startup.
• Strong background in data-intensive systems.
• Ability to contribute to architecture and execution.

Responsibilities

• Execute on platform strategy and delivery.
• Deliver key parts of the core product stack.
• Act as a senior technical leader and mentor within the team.

Skills

Senior engineering experience

Backend engineering background

Mentoring engineers

Pragmatic decision-making

Experience with LLM or financial/market data products

Tools

Agile methodologies

Job description

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

• Agile

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

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Senior Engineer • London Area, United Kingdom, United Kingdom