X402 — Casper, WY · São Paulo, BR
X402 designs, deploys and runs mission-critical systems: hybrid cloud architecture, secure networks, compliance-grade storage, real-time communications and AI-driven automation — and keeps them running.
From the rack to the cloud to the AI layer on top. X402 takes ownership of the whole stack — architecture, implementation and day-2 operations — so the systems that run your business don't depend on luck.
Deep, hands-on AWS work — SES, S3, KMS, Lambda, CloudFront, Route53, Kinesis Firehose — plus Oracle Cloud, Microsoft 365 and Azure tenancy design. Everything reproducible, documented and least-privilege.
Proxmox VE clusters, ZFS storage, immutable backup chains with Proxmox Backup Server, and hybrid designs that bridge on-premises hardware with public cloud where it makes sense.
Encrypted WireGuard meshes across sites, EdgeRouter and Ubiquiti deployments, VLAN segmentation, firewalling and zero-standing-access policies for sensitive environments.
Agentic workflows and automation pipelines built on Claude and the Anthropic API — document processing, operations tooling and business automation that actually ships to production.
WebRTC conferencing, TURN/STUN infrastructure, SIP telephony and full-stack email systems — DKIM, SPF, DMARC, inbound processing and deliverability done right.
Evidence-grade data retention: WORM storage with S3 Object Lock, KMS encryption, RFC-3161 trusted timestamping and audit trails built for regulators and courtrooms, not just checklists.
Not slideware. These are systems we designed, built and operate.
Peer-to-peer video conferencing with no accounts and no data retention — share a 6-digit code and talk. WebRTC mesh for up to 8 participants, screen sharing, self-hosted TURN for NAT traversal, delivered worldwide through CloudFront.
Every inbound message is hashed with SHA-256, timestamped against a DigiCert RFC-3161 authority and written to KMS-encrypted S3 buckets under a 10-year COMPLIANCE-mode object lock. DKIM-signed bytes preserved intact — cryptographic proof of what was sent, when.
Full-node infrastructure run against live networks: block producer and redundant relays with hardened key handling, monitored performance and automated failover — infrastructure where five minutes of downtime is measured in missed blocks.
Proxmox virtualization spanning multiple physical locations, stitched together with an encrypted WireGuard mesh: segmented VLANs, immutable backups, UPS-backed power, monitored from a single pane — datacenter discipline at every scale.
Chosen for reliability and operability — every item here is in active use, not résumé filler.
X402 is run by Mathias Cordeiro — an engineer who stays for the operations.
Most consultancies design a system, hand over a PDF and disappear. X402 works the other way around: everything we architect, we also run. That changes how you build — when you're the one answering the pager, you choose boring technology, automate ruthlessly and write the documentation you'll need at 3 a.m.
X402 takes on infrastructure, automation, communications and AI-integration work for businesses that need their systems to simply keep working — operating from the United States and Brazil, for clients anywhere.
Tell us what you're running — or what keeps breaking — and we'll tell you honestly whether we can help. Replies come from a human, usually within a day.