Ship changes safely
Push to main and it goes live. I build GitHub Actions pipelines that deploy, clear caches and sign in to AWS with short-lived OIDC credentials instead of stored keys.
I build cloud infrastructure that deploys itself.
I'm Hammond, a cloud engineer in Warsaw. I turn manual AWS work into Terraform and pipelines your team can trust, and I bring ten years of IT experience to the problems your customers actually feel.
- Certified
- AWS Solutions Architect – Associate and Cloud Practitioner
- Right now
- Leading 14 technical support specialists at Oura
- Builds with
- AWS, Terraform, Docker and GitHub Actions
What I can do for your team
Rebuild any environment from code
Your AWS setup lives in Terraform, so it is reviewable, repeatable and easy to hand over. No one has to remember what was clicked in the console.
Run workloads on AWS
Serverless and container designs that scale without extra work, from a static site on S3 and CloudFront to services on ECS Fargate.
Find root causes, not symptoms
I work with engineers on backend, API and cloud issues, using Linux and API diagnostics and platform metrics to stop incidents coming back.
Lead the people on the front line
I lead 14 support specialists with clear workflows, coaching and shared metrics. Customers get faster answers, and engineers get fewer interruptions.
Results
What changed under my team at Oura, where I've led 14 technical specialists since December 2023.
30%
Fewer engineering escalations
Standard troubleshooting workflows and automation scripts handled more cases at the first line.
25%
Faster investigations
Linux and API-based diagnostic steps replaced guesswork.
21%
Faster average response time
Clearer processes and better tooling for the whole team.
17%
Higher customer satisfaction
Quicker, more accurate answers showed up in the scores.
15%
Fewer recurring incidents
Working with engineering on backend, API and cloud-integrated issues.
12%
Better platform reliability
Root causes found in operational metrics and passed to product and cloud teams.
Proof you can click
Claims are cheap, so here is working infrastructure. The first piece is the page you are reading.
How this page reached you
This site runs on the setup below. Send a request to follow it through, then push a change to see the cache reset.
Your browserAsks for hammondmutambara.com
Route 53DNS alias to CloudFront
CloudFrontHTTPS and edge cacheCache empty
S3Private bucket, read by CloudFront only
- Waiting for a request.
- Everything is Terraform: private S3 bucket, ACM certificate, CloudFront, Route 53 and the deploy role.
- Every push to main deploys through GitHub Actions with OIDC and clears the CloudFront cache.
- No AWS keys are stored anywhere in the repository.
Serverless URL shortener
A serverless AWS app that turns long links into short ones.
What it shows: I can design, build and automate a complete AWS app.
- Serverless design on AWS, so there are no servers to patch or scale.
- All infrastructure is defined in Terraform and can be rebuilt from scratch.
- GitHub Actions tests and deploys every change from the repository.
Three-tier app on ECS Fargate (in progress)
A containerised web, application and data stack, built to run at low cost.
What it shows: I can run containers on AWS with production habits and a small bill.
- Web, application and data tiers running as containers on ECS Fargate.
- Terraform defines the networking, services and permissions in its own repository.
- GitHub Actions deploys through OIDC, so no long-lived AWS keys are stored.
Serverless data processing pipeline
Files uploaded to S3 are processed by Lambda and stored in DynamoDB.
What it shows: event-driven design with least-privilege security.
- S3 uploads trigger Lambda functions for real-time processing.
- Lambda code with robust error handling writes results to DynamoDB.
- IAM roles and policies follow least privilege, and Terraform deploys the whole stack.
Dockerized web app on ECS
A containerised web app running as a managed Fargate service.
What it shows: image to running service, with infrastructure as code.
- Built the Docker image on EC2 and pushed it to DockerHub.
- Terraform provisions the ECS cluster, IAM roles and security groups.
- An ECS task definition pulls the image and runs it on Fargate.
PowerofMath, a full-stack web app
A responsive web app with a serverless AWS backend.
What it shows: I can build the product as well as the platform under it.
- Responsive HTML and CSS interface built from modular components.
- DynamoDB data model for flexible, fast retrieval.
- Secure API endpoints on Lambda and API Gateway.
Why work with me
I know both sides of the ticket
I came up through IT support and system administration before moving into cloud engineering. I design systems with the people who run them, and the people who rely on them, in mind.
If I do something twice, I script it
Most of my results above started as work someone was doing by hand. I turn repeat work into code, documentation and workflows that the whole team can use.
I keep learning in the open
Two AWS certifications in 2025, and projects on GitHub that you can read line by line. I'm based in Warsaw, Poland.
Toolbox
- Cloud
- AWS: EC2, S3, Lambda, ECS, Fargate, CloudFront, Route 53, DynamoDB, IAM, CloudWatch
- Containers
- Docker, Kubernetes, AWS ECS
- Infrastructure as code
- Terraform, CloudFormation
- CI/CD
- Git, GitHub Actions, automated deployments
- Scripting
- Python, Bash
- Networking
- TCP/IP, DNS, DHCP, VPN and firewalls, LAN/WAN design, Cisco and Juniper
- Systems
- Linux (Ubuntu, CentOS), Windows Server, Active Directory and Group Policy, VMware, VirtualBox
Where I've done it
Dec 2023 to now
Oura Ring
Technical Support Team Lead. Remote, leading 14 specialists.
2021 to 2023
Foundever
Technical Support Engineer and System Administrator. AWS, Linux, networking and security in Warsaw.
Mar 2017 to Jun 2021
TelOne
Technical Support Engineer. Active Directory, patching, networks and virtualisation in Zimbabwe.
Jan 2016 to Jul 2017
Nuestra Computers
IT Specialist. Servers, hardware and LAN/WAN support in Zimbabwe.
Credentials
July 2025
AWS Certified Solutions Architect – Associate
Verify this credentialMarch 2025
AWS Certified Cloud Practitioner
Verify this credential2021 to 2024
Bachelor of Information Technology
Warsaw University of Business
Have a cloud problem or an open role?
Tell me what you're trying to build or fix. I reply to every email, and a few lines about your setup is enough to start.
hammondcarlsen@gmail.com© 2026 Hammond Mutambara