Help us build the world's fastest and most accurate email verification engine.
We are currently looking for talented individuals to join our remote-first team.
Remote • Full Time
We are looking for an experienced backend engineer to help us scale our verification engine. You will be working with Go, PHP, and Redis to process millions of emails per hour.
Apply NowRemote • Full Time
Help us reach more users. You will be responsible for SEO, content marketing, and paid acquisition strategies.
Apply NowAt KaijuVerifier, our engineering team designs low-latency DNS resolvers, asynchronous SMTP state machines, anti-abuse heuristics, and Swiss Precision web interfaces that process millions of verification probes every day. We operate as a high-autonomy, remote-first engineering organization where every developer ships production code directly to global edge nodes.
We look for systems thinkers who enjoy reading IETF RFCs (RFC 5321, RFC 7208, RFC 6376, RFC 7489), optimizing TCP/TLS socket pools, reducing p99 API tail latency, and building transparent self-serve tools that save B2B companies thousands of dollars per month. Our engineering culture emphasizes deep protocol mastery, zero-bloat architecture, and measurable customer impact. Every member of the KaijuVerifier team works directly on core challenges such as adaptive anti-greylisting state machines, real-time disposable domain graph indexing, multi-tab Excel workbook streaming, and low-latency edge APIs that process millions of B2B and consumer verifications daily without data retention. We publish open-source diagnostic tooling, benchmark our resolvers against global anycast DNS infrastructure, and offer flexible remote work from anywhere in Europe or the Americas.
| Engineering Discipline | Core Technical Domain at KaijuVerifier | Work Mode & Compensation Structure |
|---|---|---|
| Core Network & SMTP Systems Engineer | Async socket pools, TLS 1.3 handshakes, FCrDNS & anti-greylisting | 100% Remote (EU / Americas) · Base + Equity + Hardware Stipend |
| DNS & Threat Intelligence Researcher | 112k+ disposable domain crawler, MX fingerprinting & spam-trap traps | 100% Remote · Open-source & IETF research support |
| Full-Stack Product & DX Engineer | Sub-second REST APIs, SheetJS .XLSX pipelines & Swiss UI system | 100% Remote · Direct ownership of user-facing growth tools |
Yes. Our distributed systems, DNS telemetry, and developer experience teams work asynchronously across European and North American time zones with competitive equity and hardware stipends.
We build high-concurrency network probes, custom DNS resolvers, low-latency REST APIs, and browser-native WebAssembly/SheetJS data pipelines focused on Swiss Precision reliability.