Joel Teo
Verified Expert in Engineering
Security Engineer Developer
Singapore, Singapore
Toptal member since November 23, 2021
Joel is a security engineer at ADDX, where he and a colleague maintain the security posture of the entire company. His responsibilities are handling vulnerabilities, remediation, threat modeling, and spearhead initiatives to improve the security of the business' cloud environment. Joel loves to build things to solve or automate practical problems for the people around him and tries out new technologies and concepts that he comes across, such as Kubernetes, Serverless, and containers.
Portfolio
Experience
- Python - 5 years
- Amazon Web Services (AWS) - 5 years
- Penetration Testing - 4 years
- DevOps - 4 years
- Security - 4 years
- Serverless - 3 years
- Kubernetes - 2 years
- Cloud Security - 2 years
Availability
Preferred Environment
Python, Amazon Web Services (AWS), Kubernetes
The most amazing...
...project I've done is automate the log's collection from an API, which saved the time needed to issue triage by 80%.
Work Experience
Security Engineer
ADDX
- Managed security operations and triage namely SIEM, internal penetration tests, threat modeling, red teaming, and MASNET announcements.
- Configured the security of an AWS multi-account Office 365 infrastructure.
- Dealt with external auditors and penetration testers like TRM and ISO 27001, among others. Reported to the senior manager on recommendations.
DevOps Engineer
Freelance
- Built and maintained pipelines to automatically make containers and push Kubernetes configurations to the cluster.
- Wrote documentation for developer teams to ensure that they learn how to use the pipelines and improve their efficiency.
- Troubleshot and performed root cause analysis of issues found in existing production infrastructure, and built tests and procedures to prevent it from happening again.
DevOps Engineer
Toptal Client
- Rebuilt and restarted the application from the existing infrastructure without detailed instructions.
- Troubleshot and fixed bugs present in the system to reduce user friction.
- Streamlined Terraform code to create and destroy environments removing unnecessary additional variables and improving security.
Security Consultant
SEC Consult
- Managed projects as project leader. I was the point of contact for multiple clients in the financial sector.
- Provided advisory and consultation to business units, business owners, and project teams regarding cloud security. Performed training and conducted projects as a cloud security SME.
- Performed penetration testing, vulnerability assessment, and risk management services to clients.
Experience
Price Aggregator for Multiple eCommerce Websites
Machine Learning Prediction Engine for HDB Houses
https://medium.com/@orangecola3/creating-and-using-a-machine-learning-model-with-aws-sagemaker-61818a39b769SecDevOps Pipeline Implementation
Two-tier Serverless Architecture
Certifications
AWS Certified DevOps Engineer Professional
AWS
Certified Information Systems Security Professional
ISC2
AWS Machine Learning Speciality
AWS
Certified Kubernetes Administrator
CNCF
Microsoft Certified | Azure Security Engineer Associate
Microsoft
AWS Solutions Architect Professional
AWS
AWS Certified Speciality | Security
AWS
Offensive Security Certified Professional
Offensive Security
Skills
Libraries/APIs
Node.js, React
Tools
Amazon EKS, AWS IAM, GitHub, Amazon Virtual Private Cloud (VPC), Shell, Terraform, AWS CloudFormation, Amazon Cognito, AWS CodeCommit, Amazon Elastic Container Service (ECS), VMware, GitLab CI/CD, GitLab, Amazon CloudWatch, Jenkins, Nessus, NMap, Postman, AWS CodeBuild, Celery, Amazon SageMaker, Git, Ansible, Amazon Simple Queue Service (SQS)
Languages
Python, PHP, SQL, Bash, Go, TypeScript, Ruby
Paradigms
DevOps, Penetration Testing, Microservices, Continuous Delivery (CD), Software-defined Networking (SDN)
Platforms
Kubernetes, Amazon Web Services (AWS), Linux, Unix, AWS Lambda, Amazon EC2, Ubuntu, AWS Elastic Beanstalk, Docker, Burp Suite, Kali Linux, Google Cloud Platform (GCP), Azure, Blockchain
Storage
Amazon S3 (AWS S3), Amazon Aurora, MySQL, Google Cloud Storage, Google Cloud, PostgreSQL, Amazon DynamoDB
Frameworks
ASP.NET, Flask
Other
Cloud Security, Security, Web Security, Mobile Security, Application Security, Network Protocols, Cloud Infrastructure, Cloud, IT Security, Shell Scripting, AWS DevOps, Serverless, CI/CD Pipelines, Site Reliability Engineering (SRE), ISO 27001, Amazon RDS, Networks, API Gateways, AWS Auto Scaling, Load Balancers, System Administration, GitOps, Infrastructure as Code (IaC), AWS Certified DevOps Engineer, Containers, Machine Learning, AWS CodePipeline, Storage, Cisco, Cisco Networking, Prometheus
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