✅ DevSecOps Engineer | Certified Ethical Hacker | 7+ Years Experience
✅ Web, API, Network & Active Directory Penetration Testing
✅ 85% Faster Remediation via AI-Powered Automation
✅ Reported Vulnerabilities to Starbucks, Walmart, Lenovo, Oppo, Splunk & More
✅ CVE-2021-28861 | Bugcrowd & Responsible Disclosure Programs
Hi! I'm Hamza, a DevSecOps Engineer, Certified Ethical Hacker, and backend developer turned security automation specialist. With over 7 years of experience, I don't just find vulnerabilities; I help you fix them faster using AI-driven workflows embedded directly into your development pipeline.
I've worked with global enterprises and confidential clients — including a major US money transfer vendor and a large engineering firm — to secure web apps, cloud infrastructures, Active Directory environments, and proprietary systems. My approach combines offensive security with developer empathy, ensuring your team ships secure code without sacrificing speed.
🔧 What I Can Do For You
🔐 Penetration Testing: Web applications, REST/SOAP/GraphQL APIs, thick clients, mobile apps, internal/external networks, Active Directory enumeration & privilege escalation, lateral movement, adversary simulation
☁️ Cloud Security: AWS (S3, EC2, RDS, SES), Azure, GCP, Docker, Kubernetes, kube-hunter
⚙️ DevSecOps & CI/CD: Integrate SAST, DAST, SCA tools AI-assisted remediation Shift-left security gates
🐧 Linux & Server Admin: VPS setup, Nginx + reverse proxy, SSL installation & troubleshooting, DNS, Cloudflare
🛡️ Active Directory Security: Enumeration, privilege escalation, lateral movement, AMSI bypass techniques
📦 Backend Development: Python, PHP, Node.js, Bash, PowerShell Firebase + Cloud Functions SQL/NoSQL
🧹 WordPress Security: Malware removal, plugin customization, performance optimization (up to 90% improvement)
📜 Certifications
eCPPT – Certified Professional Penetration Tester (2025)
CRTA – Certified Red Team Analyst (2025)
CAP – Certified AppSec Practitioner (2024)
🏆 Recognized & Proven
CVE-2021-28861 – Identified open redirect vulnerability in Python's HTTP server
Alibaba CDN – Achieved stored XSS and responsibly disclosed
Bug Bounty & Responsible Disclosure – Starbucks, Walmart, Lenovo, Oppo, CM. com, EURid, Tomorrowland, Splunk, and 15+ private programs
Published Writeup – User PII theft via XSS & parameter pollution
💬 Why Work With Me?
"Hamza reduced our vulnerability remediation time by 85% by integrating AI-assisted remediation into our CI/CD pipeline."
— Client Engagement
I don't just hand you a 100-page report and disappear. I work with your team to prioritize findings, provide context-aware fix guidance (powered by LLMs), and ensure vulnerabilities actually get fixed, not just found.
Whether you need a one-time penetration test, continuous security integration, or an emergency WordPress malware cleanup, I bring the same rigor, communication, and results.
Penetration Testing
Server Administration
Malware Removal
Ethical Hacking
Vulnerability Assessment
WordPress Bug Fix
DevOps
AI Security
AWS CloudFront
Mateusz S.
Prague, Czech Republic
$130/hr
4.6
32 jobs
I am an experienced consultant specializing in research and development of Robotics systems. With over a decade of professional experience in robotics, I strive for customer success and delivering products as quickly as possible.
As you will see from my profile, I work mostly with wheeled mobile robots and drones, often utilizing Robot Operating System (ROS).
In my view, good practices and iterative development are key to creating high-quality products. When I'm working with you, I'll make sure to understand your product, and make sure that everything I'm delivering for you is aligned with your mission.
I take excellent care of honing my skills and staying up to date on the current state of Robotics, thus each week I release a new issue of my Weekly Robotics newsletter.
Below you will find some highlights of my expertise:
ROS:
* Navigation stack
* Localization stack
* ros_control
* cartographer, slam_toolbox, AMCL
* Deploying ROS on custom robotic solutions
* Developing drivers for sensors and actuators
Drones:
* Px4 flight stack
* ArduPilot (ArduCopter, ArduRover)
* Developing drivers for custom sensors for the above flight stacks
* Using ROS on a companion computer for high-level control
Sensors experience:
* ToF sensors (single points and arrays)
* Ultra Wide Band (UWB) localization
* RTK GPS
* Single and multiplane LiDARs (Hokuyo, RPLIDAR, Livox, Ouster OS-1)
* IMUs (RazorIMU, Bosch BNO055, PhidgetSpatial, Xsens)
* Tracking modules (Realsense T265)
* 3D Cameras (Realsense D435i)
Embedded System
C#
C++
C
Desktop Application
Python
Robot Operating System
Mechatronics
Robotics
Drone
Max T.
Prague, Czech Republic
$120/hr
4.9
151 jobs
Hi everyone! I’m Max, and I’ve been delivering commercial electronics development and production services for over 12 years. What drives me isn’t just the technology—it’s the process of turning ideas into real, working products.
I genuinely enjoy working with electronics, which is why I don’t see the people I work with as “clients” but as partners. To create outstanding results, you need more than just technical skills—you need passion, ownership, and a collaborative mindset.
My rate might be on the higher side, but I deliver fast and efficiently, so the overall final time (and cost) often ends up lower than average.
Key Services:
- New Product Design
- Existing Design Improvements
- Prototyping & Mass Production Management
- Sourcing and Production in China/EU
APPLICATIONS
• RF design (GPS/GSM/BLE/Wi-Fi/Zigbee)
• AI Processing Systems
• FPGA
• CPU (Allwinner, i.MX6, i.MX7, i.MX8, and others)
• Ethernet
• Android/Linux and other processor-based devices
• USB 2.0/3.0, USB-C
• IoT
• SMPS power supply, wireless QI chargers
• GaN Chargers and wall adapters
• Embedded MCU systems
• MEMS (Accelerometer, Gyroscope, Magnetometer)
• LED lighting
SERVICES
• PCB Design & Layout
• Electrical Engineering
• Realistic 3D PCB Modeling
• Prototyping (PCBA)
• Cost-effective design consulting
• Mass production management
• DFM guide
OUTPUTS
• Schematic drawing
• PCB Layout
• Gerber files / Drills
• BOM
• Pick&Place
• 3D Models
Electronic Circuit Design
Raspberry Pi
LED Physics
Altium Designer
Power Electronics
Microcontroller Programming
PCB Design
WiFi
Kilian V.
Prague, Czech Republic
$50/hr
5.0
6 jobs
Hi, I'm Kilian — a full-stack Web3 and AI developer based in Prague, Czech Republic with a proven track record of shipping products and winning hackathons.
I've shipped 11+ projects across Web3, SaaS, desktop apps, and games — working with technologies like NextJS, TypeScript, Solidity, Rust, Tauri, and Svelte across multiple blockchains including Ronin, Polkadot, and Base.
Hackathon Achievements (6 hackathons, 8 awards):
- ETHGlobal Cannes — Best Consumer App on Ronin, 1st Place
- Polkadot Web0 Berlin — Main Track Winner + Ink Alliance Bounty + UX Bounty (3 prizes)
- ETHWarsaw — Best Mini App on Base, 1st Place
- ETHGlobal Buenos Aires — Best Consumer/AI dApp on Ronin, 2nd Place
- Sub0 Symbiosis — XX Network Bounty, 1st Place ($3,000)
- Polkadot Cloud Hackathon — Community Roots Meetup Prize
Notable Projects:
- Ronkeverse — Built NFT casino games, landing pages, leaderboard systems, and backend infrastructure on Ronin
- Allstake — Sole developer of a cross-chain Web3 platform with NFT marketplaces, staking, auctions, and raffles
- Minefield Navigator — First developer hire for a SaaS platform helping e-commerce sellers expand into Europe
- The Agency — An autonomous multi-agent AI system built on Claude Code
My core stack: NextJS, TypeScript, Solidity, Tailwind CSS, and smart contract development. I also work with Rust, Tauri, Svelte, PhaserJS, and various blockchain ecosystems.
I'm passionate about building innovative decentralized applications and bringing creative ideas to life. Let's connect and build something great together.
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