Loading...

Infrastructure & Platform Engineering

Mulenga Katebe

Platform & Cloud, Mail & Messaging, Network Engineering, DNS & Resilience, Full-Stack Tooling, VoIP & Telephony

I design, build, and run the systems other people's work depends on — from the router to the running application — and I've been doing it for over twenty years.

20+
Years in infrastructure
100+
Domains under management
500+
Mailboxes served
1
Person who owns it end to end

20+

Years

of infrastructure & platform engineering

I design, build, and run the systems other people's work depends on — from the router to the running application — and I've been doing it for over twenty years.

Self-hosted infrastructure, not cloud configuration alone

The one who designs it is the one who gets paged when it breaks

Twenty-plus years, still hands-on with the hardware

What I Do
Domains under management

100+

Multi-backend mail platform handling delivery across every one of them — MTA/IMAP infrastructure with automated cross-backend routing.

Mailboxes served

500+

One person owns it end to end — design, build, and the pager when it breaks.

Technical Skills

Platform & Infrastructure

KubernetesLinux AdministrationHigh AvailabilityCI/CDDocker

Networking

Cisco / MerakiMikroTik RouterOSFiber & Wireless DesignFirewall & NATVoIP

Mail & DNS

Postfix / DovecotDNS ArchitectureAnti-Spam / Anti-AbuseTLS & Certificates

Development

JavaScriptPythonC#RustReact / Node.jsHTML / CSSPHP

Data & Security

Database AdministrationCybersecurityRate LimitingIncident Response

What I Actually Do

Not a job title — the real capabilities behind it. I design the architecture, build the automation, and I'm the one who gets paged when it breaks.

Platform & Cloud

Self-hosted infrastructure at production scale

Architected and operate a self-hosted Kubernetes platform from the ground up.
  • Multi-node, highly-available control plane with automatic failover
  • CI/CD pipelines that deploy directly to production
  • Container orchestration for a real, multi-service application fleet
Mail & Messaging

Email infrastructure that just works

Built and run a multi-backend mail platform handling delivery for 100+ hosted domains.
  • MTA/IMAP infrastructure with automated cross-backend routing
  • Spam and abuse filtering with recipient validation to prevent backscatter
  • Fingerprint-based abuse prevention — blocks the bad device, not the shared IP
Network Engineering

Connectivity that survives failure

Design and install fiber, wireless, and hybrid networks — then engineer them to fail gracefully.
  • Fiber-optic and enterprise wireless mesh design and installation
  • Virtual-IP failover across redundant nodes, verified under real fault conditions
  • Router, firewall, and NAT configuration for high-security environments
DNS & Resilience

Infrastructure that doesn't have a single point of failure

Own authoritative DNS infrastructure built for geographic and provider redundancy.
  • Geo-redundant, health-checked nameservers with automatic ISP-link failover
  • Database-level replication as a backup query path, not just a cold standby
  • Provider migration planning that never lets resolution go dark mid-transition
Full-Stack Tooling

Internal tools people actually use daily

Build the dashboards and admin tools that make operating complex systems tractable.
  • React/Node.js applications for operations, billing, and administration
  • Real-time monitoring dashboards and self-service tooling
  • APIs that other internal systems build on top of
VoIP & Telephony

Telephony deployed across distributed sites

Design and deploy cloud and on-premise VoIP systems for multi-location organizations.
  • Cloud-based VoIP server deployment with rate-limiting for security
  • Multi-site telephony rollout and remote phone provisioning
  • Fleet-management and operational systems integration

Let's Work Together

Tell me what you're building

There's no form wired up here yet — email or call directly and I'll get back to you.

Email Me Call Me
© 2026 Mulenga Katebe. All Rights Reserved.
Designed By HTML Codex