Freelance Cybersecurity Specialists in NairobiFreelance Cybersecurity Specialists in Nairobi
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Stephen Kisong'e's avatar
Stephen Kisong'e
Nairobi, Kenya
Cyber Security Analyst
Cyber Security Analyst
Cover image for AI-Assisted CTF Solving and Bug
AI-Assisted CTF Solving and Bug Bounty Hunting I integrated Cyber-Ornith Obliterated, an uncensored cybersecurity model running locally in LM Studio, with HexStrike AI through MCP to execute tools on Kali Linux. I demonstrated the setup by solving Root-Me’s HTML source-code CTF challenge. The model retrieved the page, inspected its HTML and identified a password exposed in a comment. I verified the command output and submitted the answer, successfully completing the challenge. Beyond CTFs, I built this project to support AI-assisted bug bounty hunting, including web response analysis and vulnerability investigation within authorized scope, with human oversight and verification of findings.
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32
Cover image for AI Agent Hacking & Security
AI Agent Hacking & Security Testing Explored how an AI agent can be manipulated through adversarial interactions, with a focus on AI agent hacking, prompt injection, sensitive data exposure, and unsafe agent behavior. The lab uses an AI agent connected to controlled internal data and tools, creating a realistic environment for testing how the agent responds when an attacker attempts to bypass its instructions, access information it should not reveal, or influence how it uses its capabilities. The assessment demonstrates the practical attack surface of modern AI agents and how seemingly simple interactions can become security issues when an agent has access to sensitive data or external capabilities. The testing was performed against fictional data in an isolated environment for authorized security research.
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28
Cover image for Designed and implemented a hands-on
Designed and implemented a hands-on AI red teaming environment using Microsoft PyRIT to evaluate the security of a local Retrieval-Augmented Generation application. The project connected a Parrot OS testing environment to a Windows-based AnythingLLM RAG application, with DeepSeek running locally through LM Studio. I configured PyRIT to communicate with the AnythingLLM workspace through a custom HTTP target and used controlled adversarial objectives to examine how the application handled requests involving financial records, customer information, payroll data, and restricted credentials. The testing workflow included API connectivity validation, isolated Python environment setup, automated prompt execution, response collection, and evidence review. The lab was built entirely around fictional Kiso Secure business data, allowing realistic sensitive-data disclosure scenarios to be tested without using real customer information or credentials. The resulting workflow demonstrates how automated AI red teaming can be used to identify potential data leakage, retrieval-boundary weaknesses, and unsafe handling of sensitive information in AI-powered applications.
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Cover image for Built a controlled Kiso Secure
Built a controlled Kiso Secure AI red teaming lab using Promptfoo to test a local RAG application for prompt injection, system prompt leakage, indirect prompt injection, and sensitive data exposure. The setup used AnythingLLM with a Kiso Secure knowledge base, automated adversarial testing, and a hardened workspace to compare security behavior before and after remediation.
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0
158
Cybersecurity Specialist(12)
Gabriel Chege's avatar
Gabriel Chege
Nairobi, Kenya
Expert Tech Writer on Cybersecurity & Cloud Computing
Expert Tech Writer on Cybersecurity & Cloud Computing
Cover image for Emerging Cyber Threats to Home Networks
Emerging Cyber Threats to Home Networks
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26
Cover image for Understanding Cloud Privacy Risks and Mitigation Strategies
Understanding Cloud Privacy Risks and Mitigation Strategies
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29
Cover image for How Edge Computing is Changing On-Site data Processing.
How Edge Computing is Changing On-Site data Processing.
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29
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Cybersecurity Specialist(1)
Elvis Obi's avatar
Elvis Obi
proNairobi, Kenya
I design for people and companies that care about craft.
$10k+
Earned
4x
Hired
5.0
Rating
85
Followers
I design for people and companies that care about craft.
Cover image for Amber - Life Insurance Mobile App
Amber - Life Insurance Mobile App
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11
Cover image for Landing Page Website Redesign
$5K+ earned
Landing Page Website Redesign
3
938
Cover image for Amber - Mobile App for Emergency Reports
Amber - Mobile App for Emergency Reports
6
713
Cover image for ThreadAR - E-Commerce Platform for AR Body Measurements
$4.1K+ earned
ThreadAR - E-Commerce Platform for AR Body Measurements
1
6
568
Cybersecurity Specialist(1)
brian John's avatar
brian John
Nairobi, Kenya
Diverse Tech Expert: Web & AI Solutions
Diverse Tech Expert: Web & AI Solutions
Cover image for mininet simulation in kali linux
mininet simulation in kali linux
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6
Cover image for Artificial intelligence
Artificial intelligence
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12
Cover image for machine learning
machine learning
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10
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Cybersecurity Specialist(1)
Faith Njoroge's avatar
Faith Njoroge
Nairobi, Kenya
Freelance designer creating impactful visuals
Freelance designer creating impactful visuals
Cover image for RECOVERING HACKED ACCOUNTS
RECOVERING HACKED ACCOUNTS
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2
Cover image for RECOVERING HACKED ACCOUNTS
RECOVERING HACKED ACCOUNTS
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3
Cover image for RECOVERING HACKED ACCOUNTS
RECOVERING HACKED ACCOUNTS
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2
Cover image for 301 Moved Permanently
301 Moved Permanently
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2
Cybersecurity Specialist(4)