You will lead the technical evolution of a high-impact platform connecting elite professionals with global leadership opportunities. This role involves decoupling a mature Rails monolith into modern services, building AI-enhanced matching tools, and mentoring a talented engineering team. You will drive technical strategy while shipping end-to-end features in a collaborative, cross-functional environment.
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London, United Kingdom£80k-£100k + Equity
Senior Ruby / Rails Engineer at Fast-growing HR-tech SaaS
Are you a Rails expert looking for a high-impact role at a profitable, mission-driven scale-up? This London-based HR-tech leader is looking for a Senior or Staff-level Engineer to help evolve their platform. You'll lead architectural shifts from monolith to services and build AI-powered features that connect global talent with leadership roles. If you have 10+ years of experience and a passion for building generational technology in a collaborative, hybrid environment, this is your chance to shape the future of a rapidly growing platform recognized for its excellence and innovation.
Overview
Role overview
Company
About the company
Fast-growing HR-tech SaaS platform
Responsibilities
What you will do
- Lead the migration of core platform services from a monolithic architecture to more scalable, maintainable systems.
- Develop and implement AI-powered discovery features to improve matching efficiency for high-stakes professional placements.
- Mentor mid-level engineers through code reviews and architectural guidance to foster a culture of continuous learning.
Candidate profile
Who this is a fit for
- 10+ years of professional experience with Ruby on Rails and a deep understanding of web application architecture.
- Strong full-stack proficiency including modern JavaScript frameworks like Vue.js or React and CSS frameworks like Tailwind.
- Proven track record of autonomously solving complex problems and driving technical change in a fast-paced startup environment.
What makes it remarkable
Why this role is remarkable
- Impactful mission-driven work focused on democratizing access to senior-level career opportunities globally.
- Profitable and stable scale-up recognized for rapid growth and a commitment to technical excellence.
- High-agency environment where you will influence architectural decisions and lead significant 0-to-1 technical initiatives.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack