Product Engineer (£80k-£150k + Equity) at VC-backed fintech SaaS startup

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Job Title

Product Engineer // Full-Stack

Salary

£80k-£150k + Equity

Company Description

VC-backed fintech SaaS startup

Job Description

You will build core infrastructure that automates complex financial workflows, replacing manual reviews with high-velocity AI systems. Working alongside engineers from top-tier tech firms, you will take ownership of features from discovery to production, collaborating directly with users to refine the product and scale the platform beyond its current global footprint.

Location

London, UK

Why this role is remarkable

  • Significant ownership at a prestigious accelerator-backed startup during a high-growth scaling phase.
  • Opportunity to modernize a massive global industry using a modern cloud-native stack and AI-driven automation.
  • Work directly with founders in a high-velocity environment that prioritizes technical rigour and rapid iteration.

What You Will Do

  • Architect and maintain full-stack software that powers end-to-end automated decision-making and payments.
  • Partner with internal and external users to translate complex operational requirements into intuitive product features.
  • Help shape the engineering culture and internal tooling of a rapidly expanding technical team.

The ideal candidate

  • Professional full-stack experience with React and Node.js in high-growth or top-tier tech environments.
  • A product-focused mindset with the ability to thrive in ambiguous, fast-moving startup conditions.
  • Strong technical communication skills and the desire to build products that solve real-world crises for users.

#J-18808-Ljbffr”, “datePosted”: “2026-05-17”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Jack & Jill”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__434442504__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=33” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “London” } } }
Company: Jack & Jill
Apply for the Product Engineer (£80k-£150k + Equity) at VC-backed fintech SaaS startup
Location: London
Job Description:

Job Title

Product Engineer // Full-Stack

Salary

£80k-£150k + Equity

Company Description

VC-backed fintech SaaS startup

Job Description

You will build core infrastructure that automates complex financial workflows, replacing manual reviews with high-velocity AI systems. Working alongside engineers from top-tier tech firms, you will take ownership of features from discovery to production, collaborating directly with users to refine the product and scale the platform beyond its current global footprint.

Location

London, UK

Why this role is remarkable

  • Significant ownership at a prestigious accelerator-backed startup during a high-growth scaling phase.
  • Opportunity to modernize a massive global industry using a modern cloud-native stack and AI-driven automation.
  • Work directly with founders in a high-velocity environment that prioritizes technical rigour and rapid iteration.

What You Will Do

  • Architect and maintain full-stack software that powers end-to-end automated decision-making and payments.
  • Partner with internal and external users to translate complex operational requirements into intuitive product features.
  • Help shape the engineering culture and internal tooling of a rapidly expanding technical team.

The ideal candidate

  • Professional full-stack experience with React and Node.js in high-growth or top-tier tech environments.
  • A product-focused mindset with the ability to thrive in ambiguous, fast-moving startup conditions.
  • Strong technical communication skills and the desire to build products that solve real-world crises for users.

#J-18808-Ljbffr…

Posted: May 17th, 2026