API Development
Building robust, scalable REST and GraphQL APIs with proper authentication, rate limiting, and comprehensive documentation.
Hello There! I am
Rayhan Zahwan Saleh
Founder Cycology Community | Full-Stack Web Developer | IoT Developer | Cybersecurity Enthusiast | AI Researcher
I am Rayhan Zahwan Saleh, a technology engineer with a strong passion for Cyber Security. Since 2019, I have been actively studying and exploring various aspects of the field, including Pentesting, CTF (Capture the Flag), Bug Fixing, and web development. Additionally, I have been dedicating time to learning and developing AI, with the goal of creating tools that simplify tasks for users and fellow developers. Integrity and exceptional work quality are fundamental principles that guide my professional journey.
Services
Database Architecture
Designing efficient database schemas, optimizing queries, and implementing data migration strategies for maximum performance.
Cloud Infrastructure
Deploying and managing scalable cloud solutions with containerization, microservices architecture, and CI/CD pipelines.
Technical Skills
Technologies and tools I work with daily
Cybersecurity
Ethical Hacking
Penetration Testing
Red Teaming
Vulnerability Assessment
Network Security
Cyber Defense
Information Security
Cyber Threat Intelligence (CTI)
Cyber Threat Hunting (CTH)
Privacy Security Ops
AI Security
Bug Hunter
Vulnerability Management
Web Application Firewalls
IT Security Policies & Procedures
Programming Languages
SQL
Scripting
Frameworks & Libraries
CodeIgniter
AJAX
Socket.io
WebRTC
Databases
Databases
Cloud & DevOps
Server Side Programming
Back-end Operations
Emerging Technologies
Chatbot Development
Data Science
Data Analysis
Automation
Printed Circuit Board (PCB) Design
Professional & Business Skills
Scrum
Leadership
Communication
Community Outreach
Public Speaking
Analytical Skills
Software Development
Full-Stack Web Development
API Development
RESTful WebServices
Web Application Development
Business Logic
Education
Academic journey and achievements
2024 - Present
Telkom University
Master of Computer ScienceCurrently pursuing advanced studies in computer science, focusing on cutting-edge technologies and research methodologies.
2019 - 2023
Institut Teknologi Telkom Surabaya
Bachelor of Informatics Engineering (B.I.E.) GPA: 3.78Specialized in Cyber Security with practical experience in Pentesting, CTF (Capture the Flag), Bug Fixing, and web development. Active in various student organizations and extracurricular activities.
π Founder - Cycology (Cyber Security)
π€ Robotics
π» Programming
π Volleyball
π Basketball
Professional Certifications
Industry-recognized credentials and achievements
Cybersecurity & Security
Certified Network Security Practitioner (CNSP)
Fortinet Certified Associate Cybersecurity
Ethical Hacker
Fortinet FortiGate 7.4 Operator
Cybersecurity Awareness - CAPC
Cyber Security Foundation Professional - CSFPCβ’
Cybersecurity Awareness Learner
Cisco Networking & Analytics
Junior Cybersecurity Analyst Career Path
Introduction to Cybersecurity
Networking Basics
Networking Devices and Initial Configuration
Endpoint Security
Cyber Threat Management
Cloud & Development
LFD121: Developing Secure Software
LFC111: Open Source Technical Documentation
LFEL1003: Creating Edge IoT Solutions
Cilium Gateway API
Discovery: SecOps Engineer
Business & Governance
ISO/IEC 27001 Information Security Associateβ’
Business Model Canvas Essentials - BMCEPCβ’
AI Security & Governance
PrivacyOps Certification
Scrum Fundamentalsβ’ (CASFβ’)
Lifelong Learning
Certified AppSec Practitioner (CAP)
25
Professional Certifications
8
Certification Bodies
2025
Latest Certifications
4
Categories
Learning & Professional Development
Continuous learning through courses and training
Recent LinkedIn Learning Courses
Advanced Python: Build Hands-On Projects with Design Patterns
Interactive coding course focused on design patterns for advanced Python developers, including Builder, Adapter, and Command patterns.
July 2024Cloud Native Projects: AWS Serverless
Comprehensive course on AWS Lambda serverless framework with Python, Java, and Go implementations.
August 2024Microsoft Azure Cosmos DB Developer Specialty (DP-420) Cert Prep
Advanced training on optimizing Azure Cosmos DB solutions, query performance, and indexing strategies.
May 2025Technical Skills Development
iOS 17 Development Essential Training
Comprehensive iOS development course covering Xcode fundamentals, UI development with SwiftUI, and multi-screen applications.
April 2025Juniper Networks Certified Associate JNCIA-Junos (JN0-105) Cert Prep
Network administration course covering Junos OS fundamentals, routing, configuration management, and firewall filters.
April 2025NumPy Essential Training: MatPlotlib and Linear Algebra
Advanced NumPy features including Matplotlib plotting, universal functions, and linear algebra capabilities for data science.
January 2025Hardware & IoT Development
Raspberry Pi Essential Training
Comprehensive training on Raspberry Pi fundamentals, GPIO control, and project development for IoT applications.
July 2023Python Practice: Operations
Hands-on coding challenges focusing on string operations, formatting, and algorithm implementation in Python.
April 2025Professional & Soft Skills
Nano Tips for Developing Magnetic Charisma
Leadership and communication strategies for building authentic charisma and creating better professional connections.
February 2025Responding to Unreasonable Customer Demands
Customer service excellence training focusing on de-escalation techniques and maintaining professionalism.
February 2025Git Essential Training
Comprehensive version control training covering Git workflows, branching, collaboration, and troubleshooting.
September 2023
15+
Completed Courses
4
Learning Categories
2025
Latest Learning
LinkedIn
Primary Platform
Professional Organizations
Leadership and community involvement
π
Cycology (Cyber Security Community)
Founder August 2020 - PresentCYCOLOGY is a community focused on the world of cyber security, ethical hacking, digital forensics, and all aspects related to cyber security. We serve as a platform for professionals, students, and cyber enthusiasts to share knowledge, engage in discussions, and develop skills to tackle challenges in the digital era.
Community of cyber security professionals and students
Educational platform for ethical hacking and digital forensics
Website: ctf.cycologysec.org
Work Experience
Professional journey and career milestones
Jun 2023 - Present
PT Looyal Indonesia
Back End Developer Kota Surabaya, East Java, IndonesiaActively involved in AI project development, leveraging machine learning algorithms and data analytics to enhance productivity and efficiency. Working on intelligent systems that automate repetitive tasks, provide valuable insights, and streamline decision-making processes.
π€ AI Development
π Data Analytics
β‘ Process Automation
Jan 2023 - May 2023
Surya Indah Mobil Pamekasan
Fullstack Web Developer Pamekasan, East Java, IndonesiaDeveloped a comprehensive System Information and Point of Sale (POS) website using Laravel, JavaScript, and Ajax. Created centralized system for inventory management, customer records, and employee information with seamless transaction capabilities.
π Automotive Industry
πΌ POS System
π Inventory Management
Mar 2022 - Sep 2022
PT PERKEBUNAN NUSANTARA XII
Full Stack Developer Surabaya, East Java, IndonesiaDeveloped web module for Android supporting annual Tebang Muat Angkut (TMA) activity. Built upon information system with API integration, focusing on logging, loading, and transporting operations with real-time data synchronization.
π± Agriculture Industry
π± Mobile Integration
π Real-time Sync
Apr 2022
PT Jasa Marga (Persero) Tbk
Cyber Security Analyst Surabaya, East Java, IndonesiaConducted comprehensive vulnerability analysis and penetration testing on client's website before hosting deployment. Provided detailed security assessment reports and recommendations to mitigate identified risks and enhance security posture.
π Vulnerability Assessment
π΄ββ οΈ Penetration Testing
π Security Reporting
Jun 2019 - Mar 2023
Institut Teknologi Telkom Surabaya
Assistant Software Engineer Kota Surabaya, East Java, IndonesiaServed as Lecturer's Assistant contributing to various computer science fields including Data Structure Algorithms, Web Development, Desktop Development, and Android Development. Provided support in teaching and enhanced technical skills across multiple programming domains.
π Academic Support
π» Multi-platform Development
π Teaching Assistant
Let's Connect!
Ready to bring your ideas to life? Let's create something amazing together!
50+
APIs Developed
99.9%
System Uptime
10k+
Req/Sec Handled
π§
Email
rayhanzahwans1@gmail.com
π¬
Response Time
Usually within 24 hours
π
Timezone
GMT+7 (Jakarta)