Senior Remote-First Blockchain Security Architect
Saudi Arabia
Listed on 2026-02-20
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IT/Tech
Blockchain / Web3, Cybersecurity, Data Security
Senior Blockchain Security Engineer – Full‑time, contract through MLabs, supporting a UAE‑based enterprise blockchain and fintech client.
Remote‑first model with a preference for candidates in Eastern Europe, MENA, or India.
Job DescriptionMLabs is hiring a Senior Blockchain Security Engineer to secure smart contracts, blockchain integrations, and protocol‑level components within a custom enterprise blockchain ecosystem. This role requires deep expertise in smart contract vulnerabilities, secure architecture design, and threat modeling in decentralized systems. The ideal candidate will have hands‑on experience auditing smart contracts and identifying vulnerabilities in production blockchain environments.
Responsibilities- Conduct security reviews and audits of smart contracts and blockchain components.
- Identify, document, and mitigate vulnerabilities in decentralized systems.
- Perform threat modeling and risk assessments.
- Collaborate with smart contract, protocol, and backend teams to improve security posture.
- Implement secure development standards and best practices.
- Support incident response and vulnerability remediation.
- Contribute to security documentation and review processes.
- 5+ years of software engineering or security engineering experience.
- Strong experience auditing Solidity smart contracts.
- Deep understanding of common blockchain vulnerabilities (reentrancy, overflow, access control, front‑running, etc.).
- Experience with security analysis tools (e.g., Slither, Mythril, Foundry, etc.).
- Strong understanding of blockchain architecture and transaction lifecycle.
- Experience working in production blockchain environments.
- Preferred: experience participating in formal smart contract audits.
- Preferred: experience with Layer‑1 or Layer‑2 security.
- Preferred: experience in fintech or regulated environments.
- Background in application security or penetration testing.
- Experience working in distributed remote teams.
- Competitive international compensation.
- Long‑term engagement on an enterprise blockchain platform.
- Opportunity to secure advanced blockchain infrastructure.
- Career growth within MLabs’ global engineering network.
Due to the high volume of applications we anticipate, we are unable to provide individual feedback to all candidates. If you do not hear back within 4 weeks, please assume that you have not been successful on this occasion. We appreciate your interest and wish you the best in your job search.
Commitment to Equality and AccessibilityAt MLabs, we are committed to offering equal opportunities to all candidates. We ensure no discrimination, provide accessible job adverts, and offer information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities. If you need reasonable adjustments during the hiring process or would like the job advert in an accessible format, please email human‑resources@mlabs at the earliest opportunity.
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