Jay Tillu

@jaytillu

Information Security Engineer

IndiaJoined February 2023

About

Hello! I'm Jay Tillu, an Information Security Engineer at Simple2Call. I have expertise in security frameworks and compliance, including NIST, ISO 27001, and ISO 27701. My specialities include Vulnerability Management, Threat Analysis, and Incident Response. I have also earned certifications in Google Cybersecurity and Microsoft Azure. I’m always eager to connect and discuss cybersecurity—let's get in touch!

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Jay Tillu's blogs

CyberSecurity Blogs - Jay Tillujaytillu.hashnode.dev224 posts

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Recently published

JTJay Tillujaytillu.hashnode.devJun 24, 2025 · 4 min read

Understanding IAM Roles in AWS: Trusted Entities, Types, and Practical Use Cases AWS SAA

Arjun had just stepped into his new role as a Cloud Security Engineer. His team was building microservices on AWS. On Day 1, a developer pinged him: “Hey bro, our EC2 instance needs access to S3. Can you create an IAM User and share the access key?”...

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JTJay Tillujaytillu.hashnode.devJun 18, 2025 · 5 min read

Learn how AWS RCPs Implement Security Boundaries Effectively

Arjun had just joined a fast-growing fintech startup as a Cloud Security Engineer. His mission?Secure the entire AWS infrastructure across dev, test, and production accounts. The company was using AWS Organizations to manage accounts, and they alread...

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JTJay Tillujaytillu.hashnode.devJun 17, 2025 · 8 min read

AWS Security Groups vs. Network ACLs: What You Need to Know

Arjun, a new Cloud Security Engineer, just joined a fast-growing fintech startup. His job? To secure their AWS infrastructure. One morning, Arjun’s manager dropped a bomb. “We’re going live with our EC2-powered web app next week. Set up the VPC-leve...

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JTJay Tillujaytillu.hashnode.devJun 16, 2025 · 5 min read

How to Set Up a Private EC2 Network on AWS with NAT and Secured SSH Access

Arjun had just landed his new role as a Cloud Security Engineer at a fintech startup. On Day 2, his manager dropped this on him: “Build a secure AWS network. No public exposure. We want a private EC2 that can access the internet — but no one should ...

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JTJay Tillujaytillu.hashnode.devJun 13, 2025 · 5 min read

What Are AWS Bastion Hosts and How Do They Work?

Arjun is a Cloud Security Engineer who is setting up a production-grade AWS architecture. His EC2 instance holds critical data, so he places it inside a private subnet — completely isolated from the internet. But then...He needs to SSH into that inst...

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Jay Tillu

About

Available for

Jay Tillu's blogs

Recently published

Understanding IAM Roles in AWS: Trusted Entities, Types, and Practical Use Cases AWS SAA

Learn how AWS RCPs Implement Security Boundaries Effectively

AWS Security Groups vs. Network ACLs: What You Need to Know

How to Set Up a Private EC2 Network on AWS with NAT and Secured SSH Access

What Are AWS Bastion Hosts and How Do They Work?

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Jay Tillu

About

Available for

Jay Tillu's blogs

Recently published

Understanding IAM Roles in AWS: Trusted Entities, Types, and Practical Use Cases AWS SAA

Learn how AWS RCPs Implement Security Boundaries Effectively

AWS Security Groups vs. Network ACLs: What You Need to Know

How to Set Up a Private EC2 Network on AWS with NAT and Secured SSH Access

What Are AWS Bastion Hosts and How Do They Work?