We're building Sender Registry to make it much easier to know when an email isn't what it claims to be. To do that, we need smart, curious people who are excited about building something genuinely useful.
We're still small, we're growing quickly and we're only at the beginning. That means your ideas matter, your work makes a visible difference and you'll have a real voice in where we go next.
We're looking for curious people who want to understand how attacks really work and enjoy finding solutions rather than simply following a script. Most importantly, we want people who are excited by the opportunity to join us early, bring their own ideas and play a genuine part in shaping the product and the company we're building.
Sender Registry is a business email intelligence network. We help businesses spot suspicious senders, impersonation and fraud before anyone clicks, replies or pays.
Sender Registry started with one simple problem: watching family members get fooled by increasingly convincing fake emails. That idea has grown into a network where one person spotting a threat can help protect everyone else using it. We're still early and still small but we're building quickly. That makes this an exciting time to join us and means the people we hire now will have a genuine role in shaping what Sender Registry becomes.
Real earning upside
Competitive base salary plus uncapped commission. Perform well and there is no ceiling on it.
Proper time off
20 days holiday on top of your local public holidays, because good work needs a rested brain.
Ground floor, real growth
Direct access to leadership, no layers to fight through and real opportunities to move into senior roles as we scale.
Message us on LinkedIn and tell us what you would bring.
You can change this at any time.
Every object in the registry (a sender, a domain, a campaign) moves through five stages as independent evidence builds:
This is deliberately separate from Risk and Confidence. How much of the network agrees is a different question from how dangerous something looks, or how certain we are.
Every campaign gets scored across 8 axes: infrastructure, domain patterns, message templates, link behaviour, attachment patterns, target industries, target roles, and campaign velocity. All plotted as a fingerprint.
Sender Registry compares every campaign's fingerprint against every other campaign's using cosine similarity: the same technique used to compare documents by meaning, not just matching words. A high match (we only ever suggest one above 55% similarity) means two campaigns that look unrelated on the surface may share real infrastructure, even under completely different domain names.
Senders, domains, URLs, attachments, campaigns, brands and suppliers all become nodes in a shared relationship graph, built from real evidence: a sender using a domain, a domain appearing in the same report as another domain, a report belonging to a campaign.
On a phone, we deliberately don't force a giant graph onto a small screen. Instead you get a focused view: the object you're looking at, and everything directly connected to it, with a tap to move to any of those connections in turn.
Add Sender Registry to your home screen and turn on notifications from your account - both free, both take under a minute. From then on, anything urgent (a payment-diversion campaign, an executive impersonation attempt) reaches you as a real notification on your lock screen, the same way any other app alerts you.
Every notification is sent end-to-end encrypted directly to your device - nothing is readable in transit by anyone other than your phone.
Open Verify Before You Act, point your camera at a QR code, and capture it. The image is decoded and the destination it leads to is checked exactly the same way we already check a QR code found inside a forwarded email - the same detection, just with your camera as the front door.
You'll see whether the destination is safe, blocked, or worth a second look, with a plain explanation either way.
On Android, once the app is added to your home screen, "Sender Registry" simply appears as an option in your phone's normal Share menu - the same one you'd use to send a photo to a friend. Share a suspicious text or link straight in, review it, and submit.
On iPhone, Apple's own software doesn't allow a website to appear in the Share menu automatically. A short, one-time setup (a free "Shortcut") gets you the same result - after that one step, it behaves identically on both phones.
Sender Registry