Join Judge.me to solve real-world commerce problems for hundreds of thousands of global merchants. You will own core product features end-to-end, writing clean Ruby on Rails and JavaScript code while navigating ambiguity to drive high-impact outcomes. This role offers clear career progression into Staff or Leadership tracks within a results-driven, engineering-first culture.
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Senior Software Engineer (Fullstack) at Judge.me
Judge.me is looking for a Senior Fullstack Engineer to join their London team and help shape the future of trust in e-commerce. Powering hundreds of thousands of merchants globally, this role offers the chance to ship high-impact features using Ruby on Rails and AWS while enjoying a hybrid Shoreditch-based lifestyle. If you're a high-execution engineer looking for a path to Staff or Lead roles within a culture that values craft and results over bureaucracy, this is your next career move.
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Location
London, United Kingdom
Compensation
£100-105k
Company
Judge
Role overview
Technology, Information and Internet
[Our Mission: Fixing Trust in Commerce]
For a decade, we’ve been on a mission to close the Trust Gap — commerce’s most expensive problem in a world where distance and digital interfaces separate buyers and sellers, we’re building the definitive trust infrastructure that enables global trade to flourish.
We recognise that trust is not binary but a spectrum, and our work continually expands the boundaries of commerce itself. Every improvement we deliver unlocks new transactions that previously wouldn’t have happened.
[Our Impact Today]
- Shopify’s #1 Review Solution with 29k+ five‑star merchant reviews
- Global scale: used by 600,000+ shops across 140+ countries
- 70M+ orders processed monthly, generating 2M+ verified buyer reviews
- 40% YoY organic growth, achieved without paid marketing or sales teams
What you will do
- Own and ship core product features end-to-end, from initial design through to delivery on a global scale.
- Drive engineering excellence by writing maintainable code across Rails, JavaScript, SQL, and AWS while improving system reliability.
- Identify and remove friction in the internal developer experience by enhancing tooling, automation, and observability workflows.
Who this is a fit for
- Expert-level experience with Ruby on Rails and modern JavaScript, with a track record of delivering high-quality production systems.
- Strong product intuition and the ability to decompose complex, ambiguous requirements into clear, executable technical steps.
- Pragmatic mindset focused on continuous improvement, utilizing AI and automation to accelerate development velocity and team output.
Why this role is remarkable
- Significant scale and impact, building trust-based commerce tools used by over 200,000 active merchants across the globe.
- Exceptional career mobility with defined growth paths into Staff Engineer or Engineering Management roles as the team scales.
- High-performance culture that prioritizes deep work, short feedback loops, and sustainable excellence over long hours and bureaucracy.
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.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
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 your profile’s a match and Judge wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.