Principal Software Engineer

Job in Greater London, London, Greater London, W1B, England, UK

Listing for: Crossing Hurdles

Full Time position
Listed on 2026-04-17

Job specializations:

Software Development
AI Engineer (Applied/Software), Full Stack Developer, Software Engineer, Software Architect

Salary/Wage Range or Industry Benchmark: 80000 - 100000 GBP Yearly GBP 80000.00 100000.00 YEAR

Location: Greater London

Crossing Hurdles is a global recruitment consultancy assisting one of Europe’s leading software investors’ AI product incubators in hiring a Principal Software Engineer to build and scale real-world AI products used by thousands of customers worldwide.

This team operates like a serial startup engine — launching revenue-generating AI products inside established B2B businesses, combining startup ownership with enterprise scale.

Required Experience

10–15 years full-stack engineering experience
Built customer-facing products from 0→1
Startup / founding-team or early-stage environment experience
Experience building B2B SaaS applications
Hands-on AI/ML product experience (LLMs, agentic systems)
Bachelor’s or Master’s in Computer Science or related field
Comfortable working with C-suite stakeholders
Proven ability to mentor and lead engineers

What You’ll Do

Remain hands‑on in architecture and coding for critical systems
Build and mentor high-performance engineering teams
Drive real-world AI adoption across industries
Partner with executives and product leaders as a technical co‑leader
Own technical decisions impacting large customer bases from day one

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