Lead Software Engineer

Broadband (UK) Limited; London; Hybrid; GBP 80,000 - 110,000; Full time

Job summary

A leading broadband technology startup in London is seeking a Lead Software Engineer with a pathway to CTO. The role involves shaping product architecture, mentoring engineers, and integrating AI models to improve broadband connectivity. Candidates should have 5-10 years of experience and a strong background in software development and leadership. This opportunity offers immediate impact and a chance to work closely with the founding team in a hybrid work environment.

Benefits

Impact from day one

Growth and mentorship

Freedom to innovate

Qualifications

• 5-10+ years of professional software engineering experience.
• Track record of building and scaling real-world products.
• Strong leadership skills and ability to guide teams.

Responsibilities

• Shape the architecture and technical direction of products.
• Mentor a growing team of engineers.
• Design and integrate AI models and algorithms.

Skills

Leadership

Software Development

AI/ML Integration

Team Mentorship

Problem Solving

Tools

Laravel

React

Python

AWS

GitHub

Docker

Job description

Overview

Lead Software Engineer with a path to CTO

Location: London, E14 5RE (Hybrid)

Job Type: Full-Time

A Once-in-a-Lifetime Opportunity

We're BroadbandUK. We help millions each year make better broadband decisions, because fast, reliable internet improves everyday lives.

We've already launched the UK's first address-level price comparison service, built a speed test used by over 1 million people, and partnered with brands like Currys, Openreach, and The Telegraph.

But we're just getting started.

We're a high-growth, revenue-generating startup entering an exciting new phase. We're looking for a Lead Software Engineer with a path to CTO to join our founding team and help shape the future of connectivity in the UK.

This is a rare opportunity to help build a company from the ground up and become a household-name that touches the lives of millions.

We're now transitioning into an AI-first company, using large language models and automated workflows to transform how connectivity challenges are solved. Be part of a close-knit, ambitious team where you'll learn quickly and work on challenges that matter, and we hope you'll enjoy the journey as much as we do.

What you'll do

• As Lead Software Engineer and co-founder, you'll play a critical role in shaping the future of BroadbandUK. You'll work directly with the CEO and co-founders to:
• Mentor a growing team of engineers, guiding graduates and interns as they level up their skills.
• Shape the architecture and technical direction of our products, balancing scalability with speed of delivery.
• Design and integrate AI models and algorithms that unlock insights from national connectivity data to tackle real-world challenges.
• Leverage unique datasets from Ofcom, Openreach, independent networks and ISPs to uncover problems that directly impact how the UK connects.
• Advance the use of retrieval-augmented generation (RAG), combining LLMs with vector search, to push the boundaries of how AI can be applied to connectivity challenges.

Our stack

• Backend: PHP (Laravel), Python (for AI/ML workflows)
• Frontend: React, Next.js (preferred), with flexibility for other modern frameworks
• Infrastructure: AWS (including Lambda, S3, DynamoDB), DigitalOcean
• Data: MySQL, Redis, NoSQL stores
• Dev tools: GitHub, CI/CD, Docker
• AI & Automation: LLM APIs, vector databases, agentic workflow tools, n8n, Claude Code, Cursor

What we're looking for

• We know no one ticks every box, but proven experience in leading engineering teams and building and scaling real-world products is essential.
• 5-10+ years of professional software engineering experience, with a track record of building and scaling real-world products.
• Strong leadership skills: guiding teams and setting technical direction.
• An ownership mindset: you thrive in startup environments and like solving real problems and learning fast.
• Proven impact: you've built and scaled products, led projects that made a difference, contributed to open-source, or delivered results that truly moved the needle.

Why you'll love it here

• Impact from day one: your work goes live quickly and matters immediately.
• Big challenges, close-knit team: analytics and AI at national scale.
• Freedom to innovate: independent and privately funded, with focus over noise.
• Growth and mentorship: work closely with founders and engineers.

We see our team like a world-class orchestra; each person a virtuoso in their craft, together creating impact greater than the sum of our parts.

Apply Now

Be part of building what comes next. Apply now as BroadbandUK's Lead Software Engineer and help redefine how broadband is measured, compared and understood in the UK. To apply, send your CV with a short cover letter using the apply button. We look forward to hearing from you.

Tags: Lead Software Engineer, Laravel, React, Python, AWS, AI/ML, n8n, Claude Code, Cursor, Docker, Startups, DevOps