doorcheck
Careers

Help us check
every door.

We're a small, senior, remote-first team building AI email security that respects sovereignty — self-hostable down to the models. We ship fast, write things down, and never fake a number.

Open roles

All roles are remote-friendly. Send your resume (or your GitHub, or the thing you're proudest of) to careers@doorcheck.io with the role in the subject line.

Engineering
Senior Backend Engineer
Own microservices in the detection and remediation pipeline — high-throughput mail processing, campaign clustering, multi-tenant APIs. Node/Go, Postgres, ClickHouse, NATS, Kubernetes.
Engineering
AI/ML Engineer
The verdict engine: LLM routing and failover, token-optimized prompting, local classifiers, and the models behind the communication graph. Make “does this email make sense?” computable.
Engineering
Frontend Engineer
The console operators live in — incident views, campaign hunting, quarantine flows. Next.js/React, real-time data, dashboards that answer instead of alert.
Infrastructure
DevOps / SRE
Run the SaaS fleet and make the sovereign self-hosted distribution boring to install. Kubernetes, Helm, observability, air-gap-friendly packaging.
Infrastructure
Mail Systems Engineer
Deep Exchange on-premise, cPanel, and IMAP integration work — the connectors that give on-prem fleets first-class protection.
Security
Threat Analyst
Hunt campaigns across the network, tune detections, write the threat briefs we publish. Turn attacker behavior into fingerprints.
Go-to-market
Technical Account Manager
White-glove onboarding for beta customers — from OAuth consent to first purge. Part solutions engineer, part customer advocate.

Don't see your role? If you've run mail fleets, broken phishing kits, or shipped AI systems that had to work when the provider was down — write to careers@doorcheck.io anyway.

How we work

Remote-first
Async by default, written by habit. Timezones are a scheduling detail, not a hiring filter.
Sovereignty is the product
We build software customers can run without us — including the AI. That discipline shapes every design decision.
Ship, then sharpen
Small releases, real environments, fast feedback. Dev → beta → prod, never skipping a step.
Never fake a number
No invented stats, no imaginary certifications, no testimonial theater. If we can't stand behind it, we don't publish it.

Don't trust the email. Check it.

Connect your existing mail in minutes — no MX changes, sovereign self-hosted option, free during beta.

Get early access