Usman Tahir Qureshi profile picture

Hello, I'm

Usman Tahir Qureshi

DevOps / Site Reliability Engineer

Atlanta, GA

AWS Platform Engineering 24/7 Incident Response Zero-Downtime Delivery
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2+

Years Reliability Engineering

5

Major Infrastructure Initiatives

0

Downtime During Key Migrations

Live SRE Console

$ |

Monitoring production systems...

|

Get To Know More

About Me

0

Years

Site Reliability & DevOps / Cloud Infrastructure

Education

BS Computer Science

MS Applied Computer Science

How I Operate

Reliability

I design systems for uptime first. Clean runbooks, strong alert signal quality, safe change windows so upgrades and migrations happen without production disruption.

Automation

I build dependable platforms with measurable operational outcomes.

Collaboration

As a DevOps and Site Reliability Engineer, I focus on production resilience, automation, and observability. Delivered zero-downtime PostgreSQL and Redis upgrades, improved on-call response, and built stronger deployment guardrails for platform teams.

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Explore My

Experience

DevOps / Site Reliability Engineer

Greensky LLC | March 2025 - April 2026 | Atlanta, GA


Operated AWS infrastructure across production and development environments, managed distributed Aurora RDS PostgreSQL and Redis services, automated rollouts with GitLab CI/CD, and drove reliability improvements through on-call incident response, root cause analysis, and DR exercises.

Research Scientist (Software Engineer)

Grand Valley State University | Feb 2024 - March 2025 | Grand Rapids, MI


Designed and deployed AWS infrastructure using CloudFormation, implemented CI/CD with GitHub Actions, and built AI-native application features including a retrieval-augmented chatbot integrated into the GVSU Laker mobile app.

Platform Reliability Engineering

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AWS

Experienced

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Linux (RHEL/Ubuntu)

Experienced

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Python

Experienced

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Bash

Experienced

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Docker & Kubernetes

Intermediate

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GitLab CI/CD

Experienced

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GitHub Actions

Experienced

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AWS CDK

Intermediate

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CloudFormation

Experienced

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Datadog / Splunk

Intermediate

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CloudWatch

Intermediate

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PostgreSQL / Redis

Intermediate

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Incident Response

Intermediate

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IAM / DevSecOps

Intermediate

Software Development

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HTML

Experienced

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CSS

Experienced

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JavaScript

Intermediate

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TypeScript

Intermediate

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Node JS

Intermediate

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React JS

Intermediate

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REST APIs

Intermediate

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Swift

Intermediate

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Kotlin

Intermediate

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Flutter

Intermediate

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SQL

Intermediate

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Git

Intermediate

Reliability Impact Chart

Hands-on impact across your recent platform initiatives.

Zero-Downtime Upgrades
96%
Incident MTTR Improvements
88%
Infrastructure Automation
92%
Observability Modernization
84%

Incident Response Simulator

Fast reaction game inspired by on-call triage.

Press start to begin a 20-second incident shift.

Score: 0 Time: 20s
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Highlighted Resume

Projects

Aurora PostgreSQL Major Version Upgrade

Aurora PostgreSQL Major Version Upgrade

Orchestrated a zero-downtime major version upgrade for the Kong API Gateway PostgreSQL database across all lifecycle environments, including production cutover during maintenance windows without service disruption.

ElastiCache Redis Fleet Modernization

ElastiCache Redis Fleet Modernization

Executed rolling Redis replication-group upgrades from v5 to v7 across every environment, using staged node replacement and continuous validation to maintain zero downtime.

Rundeck Platform Migration and GitLab Pipeline Integration

Rundeck Migration + GitLab Pipeline Integration

Migrated MySQL schemas, upgraded Rundeck v3 to v5, completed DNS cutover with no production downtime, and re-architected operational jobs into version-controlled GitLab pipelines.

Snowflake Security Logging Pipeline

Snowflake Security Logging Pipeline

Built an end-to-end ingestion pipeline for Snowflake authentication events, enabling clear, tagged, and reliably routed security telemetry for downstream monitoring.

S3 Bucket Fleet Migration to CDK

S3 Bucket Fleet Migration to CDK

Contributed to an internal CDK library and migrated S3 buckets across lifecycles into a standardized Bucket Manager framework, improving governance and consistency.

GVSU Laker Mobile iOS App

GVSU Laker Mobile iOS App

E-commerce Application

E-commerce Application

Journal Application iOS

Journal Application (iOS)

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Recent Writing

Blog

Featured · Career

What on-call taught me that no course ever could

Your first pager alert at 3 AM changes how you think about reliability forever. Lessons from real incidents, not sandbox exercises.

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AWS · Career

The Most Expensive Word in Cloud Engineering: “Later”

How “we’ll fix it later” becomes alert fatigue, cloud cost creep, and hidden reliability risk across production environments.

Read Full Article

AWS · Observability

US-EAST-1 Outage Lesson: Redundancy Isn’t Recoverability

Multi-region architecture is only half the story; real resilience starts after failover when operational dependencies surface.

Read Full Article

CI/CD · Linux

When RHEL Patching Failed Quietly Across Environments

A kernel retention issue quietly blocked CVE patching until pre-patch `/boot` checks and lifecycle parity fixed the workflow.

Read Full Article

CI/CD · Kubernetes

We updated the ConfigMap. The app had no idea.

Env vars from a ConfigMap are injected at pod startup — Kubernetes won't push updates into running containers. File mounts do update automatically. Same resource, completely different behavior.

Read Full Article

AWS · ECS · Observability

It wasn't an app crash — ECS was silently OOM-killing it

Clean exits, no errors, automatic restarts — but ECS kills from outside the process and leaves no evidence inside it. Two task definition fields set identically was all it took.

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CI/CD · Terraform

The Terraform apply that locked us out

One cancelled pipeline job never released its state lock. Twenty minutes later, the whole team was blocked from deploying anything — including the hotfix that started it all.

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AWS · Platform Engineering

Moving 1.8 billion S3 objects without anyone noticing

S3 replication works. Knowing when 1.8 billion objects actually finished — and closing the old pipe before it silently corrupts the new bucket — is the hard part.

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CI/CD · Security

The CVE that was already fixed, but kept getting flagged

We patched it three times and it kept coming back — because floating Docker tags meant the image scanned and the image running were never actually the same bytes.

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CI/CD · Kubernetes

The rolling deploy that took down everything at once

Pipeline green, staging clean — and the service went completely dark. Two unset fields and Kubernetes defaults that don't guarantee what their name implies.

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AWS · Security

One open endpoint. Full AWS access.

IMDSv1 sits enabled by default on EC2 instances with no auth required — the same vector that exposed 100 million Capital One records. One command fixes it.

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AWS · IAM · Security

Least privilege sounds simple. At scale it quietly breaks everything.

Nobody grants wildcards maliciously. They happen at 4 PM on a Friday before a release — and IAM Access Analyzer plus SCPs are what contain the blast radius.

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More Writing

Read more articles

Explore the full collection of posts on reliability engineering, AWS operations, observability, incident response, and platform delivery.

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Get in Touch

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