Manasseh
Mmadu

1. v3.1ActiveJuly 2022 to present

   Zapier

   Senior Site Reliability Engineer (Remote)

   Joined as SRE. Promoted to Senior SRE in June 2025.

   • Led the zero-downtime migration of the global routing layer to a serverless, Envoy-backed stack, enabling canary rollouts and region-aware routing.
   • Saved over $400k a year with AWS VPC endpoints and an admission webhook that pulls images for 10,000+ services through an ECR cache.
   • Built Kubechecks, an open-source controller that checks Argo CD changes in CI, and tuned Argo CD to manage 5,000+ applications.
   • Built SLO operators that automate SLO management, and onboarded teams until they were adopted across the organisation.
   • Raised Grafana reliability to 99.5% and Thanos to 99.9% by sharding Prometheus, running Thanos in HA and cutting cardinality.
   • Led cross-team initiatives: zero-downtime upgrades of every cluster, signed Git commits in every repository, and recurring cost and security reviews.

   Kubechecks

2. v2.0RetiredApril 2020 to May 2022

   Deimos

   Site Reliability Engineer (Remote)

   • Mentored four SRE interns in Kubernetes, GitOps and cloud operations. All four were promoted within 12 months.
   • Automated provisioning across AWS, GCP and Azure with Terraform and Ansible, and brought existing infrastructure under Terraform.
   • Bootstrapped and upgraded Kubernetes clusters with Kops and kubeadm, secured with OpenID login and RBAC.
   • Introduced GitOps with Argo CD, and automated DNS and certificates with ExternalDNS and cert-manager.
   • Sped up slow Azure and GitLab pipelines with cached builds and leaner artifacts.
   • Set up HashiCorp Vault for Kubernetes, VMs and applications, and monitoring with Elastic Stack and Prometheus.

   Open-source Terraform modules

3. v1.0RetiredMay 2018 to July 2019

   eHealth4Everyone

   Backend Engineer (Remote)

   • Built a SaaS product that deploys DHIS2 servers automatically, using Ansible, Docker Compose, Celery and RabbitMQ.
   • Extended the open-source OnaData project for multi-platform data collection and better data visualisation.
   • Raised stability with end-to-end and unit tests across the Django suite, run in GitLab CI before every deployment.
   • Cut query times with database optimisation and caching, and upgraded projects to Django 2.0 and Python 3.

   OnaData

• January 2014 to November 2019

  Federal University of Technology, Minna

  Bachelor of Engineering in Computer Engineering

  • Graduated with First Class Honours.
  • Member of a research group working on 5G, wireless sensor networks and software-defined networks.
  • Co-founded a community that mentors new developers: FUT Developers Circle

• Certifications

  • Google Cloud Certified Professional Cloud Architect
  • Google Cloud Certified Professional DevOps Engineer
  • Certified Kubernetes Application Developer (CKAD)
  • Linux Kernel Internals and Development (LFD420)

1. 01

   Reka

   Cloud resource manager that stops, resumes or cleans up unused resources.

   View project

2. 

   02

   Dhistance

   SaaS that automates deploying DHIS2 instances, built with Django, Ansible, Docker and Celery.

   View project

3. 

   03

   Datakojo

   Online survey platform built with Django and Celery.

   View project

4. 

   04

   Signalum

   Linux tool that detects and analyses Wi-Fi and Bluetooth connections, with a desktop app.

   View projectDesktop app

5. 

   05

   Search Engine Parser

   Python package that queries popular search engines and returns titles, links and descriptions.

   View projectAPI

6. 

   06

   Gophie

   Search, stream and download movies without the ads.

   View project

Check out more on my GitHub or my open source organization.

• Paintballing
• Meetups
• Movies
• Reading
• Gaming
• Open source