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Harnham
Principal Product Engineer

Principal Product Engineer

Hybrid

Manchester, United kingdom

£ 110,000 /year

Senior

Full Time

06-10-2025

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Skills

Ruby Problem-solving react AWS

Job Specifications

Job Title: Product Engineer

Location: Remote

Salary: PS72,000 - PS110,000 + stock options

I'm working with a fast-growing SaaS scale-up software organisation.

They're looking for a Principal Product Engineer who thrives in a collaborative, product-focused environment. You'll be part of a cross-functional squad (PM, designer, engineers, data) and involved throughout the product lifecycle - from ideation to release.

Tech Stack

Frontend: React (core), Storybook, some legacy Marionette (Backbone.js).
Backend: Ruby on Rails (relative flex on this).
Infrastructure: AWS (serverless functions with Lambda, cloud hosting)..

Interview Process

Tech + product chat (30m): exploration of experience and product mindset.
Coding exercise (1h15m): React-based technical task.
Product engineering exercise (1h): problem-solving + approach to building.
Values interview with founders (1h).

About the Company

Harnham provides specialist Data and AI recruitment and staffing services, along with bespoke training solutions, across multiple industry verticals, operating in the UK, the USA and EU - contact us today to discuss your requirements: info@harnham.com Our recruitment and talent teams cover all aspects of the data and AI pipeline, from collection to consumption, across multiple data roles and functions. Whether you need full-time staff, contract talent, specialized training, Data-qualified graduates, or C-suite executives... Know more