Hi there!
I'm Muhammad Shahid a cryptographer, cybersecurity specialist, and software developer with a strong mathematical foundation in complexity theory and algorithm design. I hold a master's degree in mathematics and a bachelor's degree in computer science, and I've spent several years applying my expertise to advanced research and real-world projects across both academia and industry.
I specialize in:
Cryptography & Security Protocols designing and implementing cryptographic algorithms, proofs, and secure systems.
Blockchain & Decentralized Systems applying cryptographic primitives to smart contracts, consensus, and secure distributed applications.
Software Development proficient in Python, C, Go, and MATLAB for cryptographic computation, data analysis, and system design.
Algorithm Design & Analysis optimizing performance and reasoning rigorously about computational complexity.
I'm a fast learner who thrives in collaborative environments and enjoys tackling intellectually challenging problems. My work focuses on precision, efficiency, and secure, elegant solutions grounded in solid mathematical reasoning.
If your project involves cryptography, blockchain, security engineering, or complex algorithmic computation, I'd love to discuss how I can help bring your idea to life.
Let's connect and build something exceptional.
Cryptography
Mathematics
Security Analysis
MATLAB
Elliptic Curve Cryptography
Python
Mathematical Software
Blockchain Security
Golang
C
Mixed Integer Linear Programming
Kainat M.
Islamabad, Pakistan
$20/hr
4.7
112 jobs
I help startups, SaaS companies, fintechs, and enterprises strengthen their security posture, achieve compliance, and reduce cyber risk through practical, business-focused cybersecurity solutions.
With 12+ years of hands-on experience, I specialize in Governance, Risk & Compliance (GRC), ISO 27001 implementation, penetration testing, SOC operations, vulnerability management, and technical security documentation. My approach combines deep technical expertise with compliance knowledge to deliver secure, scalable, and audit-ready environments.
What I Can Help You With
✔ ISO 27001 implementation, ISMS development & audit readiness
✔ Risk assessments, gap analysis & security control implementation
✔ Governance, Risk & Compliance (GRC)
✔ Web, API & Network Penetration Testing (OWASP Top 10)
✔ Vulnerability Assessments (Nessus, OpenVAS, Burp Suite, Nmap)
✔ Security Operations Center (SOC) & SIEM (IBM QRadar, Splunk, Wazuh)
✔ Incident Response & Digital Forensics
✔ Network & System Administration (Windows Server, Active Directory, Microsoft 365)
✔ Cloud Security (AWS & Azure)
✔ Security Policies, Procedures, SOPs & Technical Documentation
✔ Vendor Security Reviews & Third-Party Risk Assessments
Technical Expertise
Security & Compliance
ISO 27001
NIST Cybersecurity Framework
GDPR
SOC 2
PCI DSS
Security Risk Management
Security Tools
IBM QRadar
Splunk
Wazuh
Burp Suite
Nessus
OpenVAS
Nmap
Metasploit
Kali Linux
Wireshark
Recent Experience
• Delivered ISO 27001 implementation and GRC consulting for SaaS, fintech, and regulated organizations.
• Performed web application, API, and infrastructure penetration testing with detailed remediation reporting.
• Designed and optimized SOC monitoring, SIEM use cases, and incident response workflows.
• Developed security policies, risk assessments, audit documentation, governance frameworks, and executive reports.
• Supported organizations with compliance readiness, security architecture reviews, and vendor risk assessments.
Education & Certification
• MS in Computer Engineering
• PECB Certified ISO/IEC 27001 Lead Implementer
Why Clients Hire Me
✔ 12+ years of practical cybersecurity experience
✔ Strong technical and compliance expertise
✔ Clear communication and professional technical writing
✔ Security solutions aligned with business objectives
✔ Reliable, detail-oriented, and committed to delivering high-quality results
Whether you need an ISO 27001 consultant, penetration tester, SOC specialist, cybersecurity advisor, or technical security writer, I can help you build secure, compliant, and resilient systems.
Let's discuss how I can support your next cybersecurity project.
Digital Forensics
Penetration Testing
Vulnerability Assessment
Ethical Hacking
Python
Article Writing
Artificial Intelligence
Network Security
Incident Management
Zero Trust Architecture
Technical Support
ISO 27001
Kali Linux
SOC 2
Technical Writing
Content Writing
Information Security Audit
Cybersecurity Management
Compliance Consultation
Computer Network
Mustafa Z.
Islamabad, Pakistan
$15/hr
5.0
21 jobs
I’m a specialist in Network Security, OSINT, Dark Web Monitoring, Reverse Engineering, Python Scripting, Automation, Malware Analysis, Malware Removal, Software Testing and Code Refactoring. I also deliver secure and reliable web development solutions.
Services I Provide:
- Network Security & Penetration Testing: audits, vulnerability assessments, malware analysis, malware removal
- GRC & Compliance: risk assessments, security policies and procedures, compliance assessments, control reviews, security gap assessments, risk management and compliance documentation
- SIEM & Incident Response: log monitoring, threat detection, rapid response
- OSINT, Dark Web Monitoring & Digital Forensics: investigations, digital footprint analysis, dark web searches and exposure monitoring, forensic evidence collection and analysis.
- Python Automation & Scripting: web scraping, data collection, workflow automation
- Programming Languages: html, css, javascript, php, mysql, c++, c
- Software Testing & QA: functional, security and performance testing
- Secure Web Development: web apps with security-first design
- Network Simulation & Configuration: cisco packet tracer, gns3
I provide clear communication, actionable reports, and practical solutions. Let’s secure your systems, automate tasks or build your next web project!
Digital Forensics
Information Security
Reverse Engineering
Malware Detection
Linux
Network Security
Vulnerability Assessment
Computer Network
Artificial Intelligence
Security Operation Center
Docker
Python
Cybersecurity Tool
Malware Removal
C++
C
Cloud Computing
Software Testing
Web Development
Computing & Networking
Abdullah A.
Islamabad, Pakistan
$40/hr
4.6
86 jobs
Top Rated Cybersecurity Consultant with 65+ successfully completed Upwork projects and enterprise cybersecurity consulting experience.
Security is not just about finding vulnerabilities. It is about understanding how systems, applications, and infrastructure work together and identifying the weaknesses that matter most.
I help businesses assess, design, and strengthen their security posture through independent cybersecurity consulting, technical security assessments, and practical engineering solutions. Whether you are securing a web application before launch, reviewing source code, evaluating network security, validating cryptographic implementations, or assessing enterprise security architecture, my goal is to provide clear, actionable recommendations rather than generic reports.
My work spans application security, network security, cryptography, secure code review, security architecture, and infrastructure security. I also work on advanced security engineering projects involving software protection, compiler-based obfuscation, reverse engineering, and cryptographic implementation analysis where specialized expertise is required.
My professional experience includes enterprise cybersecurity consulting, solution evaluation, technical architecture reviews, vendor assessments, security strategy, and security engineering. I have also completed freelance projects covering penetration testing, secure code review, cryptography research, security assessments, network security, enterprise security, and technical consulting.
Areas I can help with include:
• Web Application and API Security Assessments
• Penetration Testing and Vulnerability Assessment
• Source Code Security Review
• Security Architecture and Design Review
• Network and Infrastructure Security Assessment
• Cryptography and Encryption Review
• Reverse Engineering and Software Protection
• LLVM Obfuscation and Security Engineering
• Security Tool and Technology Evaluation
• Risk Assessment and Technical Security Consulting
I believe good security should be practical, measurable, and aligned with business objectives. I approach every engagement with the same mindset: understand the problem, validate the risks, provide technically sound recommendations, and deliver work that clients can trust and confidently implement.
If you are looking for a dependable cybersecurity consultant who combines technical depth with practical, business-focused security advice, I would be glad to discuss your project.
Cryptography
Algorithm Development
Digital Forensics
Penetration Testing
Security Analysis
Network Security
Computer Network
Python
Java
Linux System Administration
Cisco Certified Network Associate
Network Penetration Testing
Risk Analysis
Security Assessment & Testing
Sardar Sufian A.
Abbottabad, Pakistan
$20/hr
4.9
32 jobs
Hi, I’m Sufian — a Certified Cybersecurity Professional (ISC2 | CEH | CHFI | OPSWAT ICIP) with a solid background in penetration testing, digital forensics, incident response, and secure infrastructure design.
With over 4 years of hands-on experience, I specialize in:
🔍 Penetration Testing (Web, Network, and Infrastructure – OWASP, MITRE, Burp, Nmap, etc.)
🧪 Digital Forensics & Incident Response (Windows & Linux artifacts, Magnet Axiom, ExifTool, registry & log analysis)
🛡 Security Assessments & Hardening (HIPAA/NIST-compliant reviews, GPO lockdowns, firewall configurations)
🖥 Virtual Labs & Simulations (EVE-NG, Proxmox, ESXi, Cyber Range setups, CTF lab builds)
🔧 Server & Network Security (VPNs, pfSense, FortiGate, VLANs, AD/LDAP, remote access security)
I’ve worked with clients globally on high-impact security projects — from setting up secure AVD infrastructures, to analyzing malware-infected systems, to crafting realistic cyber defense training labs.
If you need a dedicated, technically sharp, and confidentiality-focused expert in cybersecurity, I’d love to hear about your project. Let’s secure your digital environment, together.
Digital Forensics
Information Security
Cybersecurity Tool
Python
Network Penetration Testing
C++
Cybersecurity Management
Network Security
Academic Writing
Academic Research
Aqib T.
Khanpur, Pakistan
$25/hr
4.9
16 jobs
Want to deploy production-ready AI models, automate complex visual/text workflows, or build rigorous data pipelines? I bridge the gap between advanced research and scalable engineering.
As an ML Engineer and Data Scientist with a Master’s degree, I specialize in building deterministic, high-performance AI systems. From fine-tuning LLMs and training computer vision models to engineering leakage-aware research datasets, I deliver clean, reproducible, and production-grade code.
Whether you are a startup needing a custom RAG pipeline or an enterprise optimizing massive datasets, I ensure your models perform with mathematical precision.
🚀 CORE CAPABILITIES
• AI Systems, LLMs & Automation
Building robust RAG pipelines, structured data extraction systems, and automated workflows using Gemini, OpenAI, and Claude APIs. Expert in prompting strategies that yield deterministic, enterprise-grade outputs.
• Natural Language Processing (NLP) & Dataset Engineering
Experienced with Hugging Face Transformers for text classification, summarization, and multi-label categorization. Specialized in building leak-aware, balanced training/validation pipelines (e.g., CVEfixes vulnerability dataset parsing).
• Computer Vision & Synthetic Data Generation
Hands-on experience with object detection, image segmentation (U-Net variants), and custom preprocessing. I design synthetic image/video generation pipelines using state-of-the-art tools (Runway, Vidu, Veo, Stable Diffusion) for specialized model training and simulation datasets.
• Machine Learning & Deep Learning (PyTorch & TensorFlow)
End-to-end model development, validation, and optimization using PyTorch, TensorFlow, and Scikit-Learn. Expert at resolving class imbalances, handling massive datasets, and model benchmarking.
• Statistical Modeling & Time Series
Deep mathematical background in optimization, logistic/linear regression, hypothesis testing, and time-series forecasting. Experienced with complex real-world data analysis (e.g., NHANES health prediction models).
• Data Quality & Engineering
Advanced data cleaning and curation using Python, R, CleanLab, and Argilla to isolate and eliminate noise, outliers, and duplicates before they hit your training loop.
🛠️ TECHNICAL TOOLKIT
• Languages: Python, R, Bash, SQL
• AI/ML Frameworks: PyTorch, TensorFlow, Scikit-Learn, Hugging Face
• Data Tools: CleanLab, Argilla, Pandas, NumPy, Excel (Pivot Tables)
• Visualization: R (ggplot2), Python (Matplotlib, Seaborn)
• Generative Media: Veo, Runway, Vidu, Stable Diffusion API
Let’s turn your data into a competitive advantage. Click the "Invite to Job" button to discuss your project requirements!
Cryptography
Python
Artificial Intelligence
Statistical Analysis
Machine Learning
R
Hugging Face
Data Analytics
Data Science
Natural Language Processing
Computer Vision
PyTorch
Generative AI
Large Language Model
Deep Learning
Stable Diffusion
AI Image Generation
AI Video Generation
Data Visualization
UGC
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