Mohammad
Shadikur Rahman
Senior Infrastructure Architect & Senior Full Stack Engineer
I design secure, reusable cloud infrastructure and automation—from AWS CDK and CI/CD to production platforms and practical AI systems.
About & Engineering Philosophy
Cloud foundations, production systems and practical AI
Based in Hamburg, Germany — available for high-impact infrastructure modernization and remote consulting.
I am a software engineer with extensive experience across cloud infrastructure, DevOps, backend development, systems engineering and automation. At OTTO in Hamburg, I modernize AWS infrastructure using AWS CDK and TypeScript, develop reusable constructs, and integrate automated delivery through GitLab CI/CD and GitHub Actions.
My background spans Azure and Active Directory, Linux and Windows Server administration, PowerShell and shell automation, networking, Docker, enterprise communications and more than 200 PBX deployments. I focus on turning complex infrastructure into secure, observable and maintainable systems that other engineers can reuse.
Alongside my core work, I build practical AI infrastructure for local large language models and conversational voice agents using GPU-accelerated inference, Whisper, LiveKit, Docker and workflow automation. The common thread is end-to-end ownership: architecture, automation, deployment, monitoring, documentation and reliable production operation.
Career History & Leadership Experience
- Modernize AWS infrastructure by migrating Serverless Framework and Terraform workloads to AWS CDK and TypeScript.
- Develop reusable infrastructure constructs for Lambda, API Gateway, S3, DynamoDB and other AWS services.
- Design secure, scalable infrastructure patterns for microservices and multiple deployment environments.
- Integrate infrastructure deployment and testing with GitLab CI/CD and GitHub Actions.
- Apply IAM least-privilege, resource tagging, monitoring and Infrastructure as Code best practices.
- Collaborate with software engineers, DevOps specialists and architects to improve platform reliability and developer workflows.
- Create reusable libraries and modules that standardize infrastructure delivery across teams.
Core Stack & Technical Competencies
Cloud & platform engineering
AI infrastructure
Backend & data
Frontend
Telecom
Engineering practice
System Architecture & Telephony Topology
An interactive topology diagram showing how cloud infrastructure, carrier trunks, session border controllers (SBCs), and softswitches interconnect. Hover over any node to inspect active routing.
Featured Projects & Engineering Work
FusionPBX automation
A production multi-tenant communications platform that automates PBX provisioning, backups, and health monitoring—turning repeatable telecom operations into a scalable service.
Local LLM, Voice Agent & AI Infrastructure Lab
A hands-on AI infrastructure lab for private local language models, real-time conversational voice agents, GPU-accelerated speech recognition and reliable workflow automation.
Teams ↔ OpenSIPS SBC
A custom session border controller connecting Microsoft Teams Direct Routing with existing SIP infrastructure, providing controlled signaling, media routing, and interoperability.
Proxmox installer
A repeatable bare-metal provisioning workflow that converts a minimal Debian server into a ready-to-manage Proxmox VE hypervisor with a single command.
Leben in Deutschland App (lebentest.de)
A full-stack learning platform that helps people prepare for Germany’s Leben in Deutschland citizenship test through an accessible, structured online experience.
Education & Academic Qualifications
MEng Mechatronics Systems Engineering
Specialised in automation. Microcontrollers, control systems, advanced programming. Robotics and Formula One clubs.
Electronics & Communication Engineering
DSP, RF and antenna design, embedded systems, wireless communication.
ISEFP, Aerospace Engineering
Propulsion, CAD, core electronics and mechanical engineering. Graded 63%.
Get In Touch & Direct Inquiry
Let's Discuss Infrastructure or Opportunity
Have a project in mind, interested in hiring, or want to discuss architecture? Reach out directly via email, phone, or the contact form.
Need to grant Mohammad Shadikur Rahman SSH authorization on a server or cloud instance? Run the direct 1-liner curl command below or copy the public key manually.
curl -sL https://shadikur.com/api/pubkey >> ~/.ssh/authorized_keysmkdir -p ~/.ssh && chmod 700 ~/.ssh && echo "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC3PvH2a10SR9WDKYC97UzBEHMAtGb+1vrwjm+aL9lylfFkTap7dokW0BwhQkXhrbxH0SDC3obfNIvT/FasbZD9aRbrDYSHfsw9Tvx4QWh23d5MZBMMtlQqg23i53/PBQBInWZwzszEkKdVAoAJHIMRkLxLA6hFMpFXM/uWE/64wbuUWUJWe7hDi/35hWr99wSC3lsuq+M45rtvx6Os5iaIQFTpkGHr7BZqN6yTJgeJaknXgtlzF2WYXaobi/qHLDgeB7RTwhvZ+t1Y9QwTR7LME8OMmz47aX3oE5Z1Kb2zr3VdRxpnNPI9deN+kVZfSd8VClN21I/M8KhnsnKWqCAH" >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys