Senior Blockchain Security Auditor & Penetration Tester - Upwork - Anywhere
Upwork
We are seeking an experienced Blockchain Security Auditor / Penetration Tester to conduct a comprehensive security assessment of a proprietary distributed cryptographic security platform.
This engagement requires a senior-level security professional capable of performing deep manual review and adversarial penetration testing of a blockchain-integrated cryptographic system.
Scope of Work (High-Level)
The selected expert will perform a full-spectrum security assessment including:
• Smart Contract Security Review
Logic vulnerabilities
Access control issues
State manipulation risks
Transaction-level attacks
• Cryptographic Implementation Review
Secure key handling practices
Entropy and randomness validation
Hashing and derivation review
Secure memory handling practices
• Backend & API Penetration Testing
Authentication/authorization testing
Injection vulnerabilities
Session handling review
Rate limiting & abuse testing
• Infrastructure & Network Review
Node exposure analysis
Cloud configuration review
TLS and transport security validation
Misconfiguration detection
• Adversarial Simulation
Attempted unauthorized access
Privilege escalation attempts
Data extraction attempts
System resilience under attack
Deliverables
A comprehensive written audit report including:
Executive Summary
Detailed Technical Findings
Risk Severity Classification
Proof-of-Concept Evidence (if applicable)
Remediation Recommendations
Overall Security Posture Assessment
The report should be suitable for internal stakeholders and future enterprise review.
Requirements
Proven blockchain security audit experience
Prior smart contract audits (please share examples)
Demonstrated penetration testing background
Ability to produce structured professional audit reports
Senior-level experience only
Automated scan-only submissions will not be considered.
Confidentiality
Shortlisted candidates will be required to sign a Non-Disclosure Agreement before receiving arch