Security Engineer- Smart Contract Auditor (Crypto / Blockchain)

Location Type

Remote

Role

Cybersecurity

Level

Mid

Language (main)

Solidity

About Caiz

Revolutionizing Islamic Finance with Blockchain Technology

Look no further than Caiz – The First Islamic Ecosystem Built on Blockchain .

At Caiz, our mission is clear: to create a Fiqh compliant financial ecosystem that provides our community with fair and easy access to ethical financial products and services. We believe in empowering individuals to build a strong financial future while engaging in long-term economically beneficial behavior.

We are a passionate team reshaping finance, and we are expanding our dynamic workforce. Join us in a collaborative work environment focused on creating a fast and compliant money transfer structure.

Caiz is an ethical and Sharia-compliant blockchain and cryptocurrency project founded in 2022, headquartered in Bratislava, Slovakia. It aims to provide inclusive financial solutions that align with Islamic principles, avoiding interest (riba), speculation (gharar), and unethical investments. The project promotes financial freedom and inclusivity by integrating technology with ethical values to serve both individuals and institutions globally.

The core of Caiz is the Caiz Chain, a blockchain solution governed by the Islamic Federated Byzantine Agreement (IFBA), ensuring ethical blockchain governance and compliance with KYC and AML standards for secure and legitimate transactions. Caiz Coin, the digital currency of the ecosystem, enables users to send money, save, and invest in a fair and accessible manner, supported by features such as smart contract functionality compliant with Islamic finance (Fiqh), real-time transaction transparency through Caiz Scan, and a digital wallet for secure storage and instant transactions.

Caiz also fuels financial engagement through a rewards system called Caiz Earn and provides API solutions for businesses and fintech platforms to integrate ethical finance. The project is positioning itself as the first mover in Islamic-compliant blockchain finance with a strong regulatory foundation, audited compliance, and a scalable technology platform. It targets fintech and banking collaborations as well as institutional investors who want to participate in Sharia-compliant financial growth.

The company behind Caiz, Caiz Trade S.r.o., is officially registered in Bratislava-Rača, Slovakia. The project emphasizes ecological responsibility by adopting eco-friendly blockchain technologies. Caiz is preparing for broader exchange listings to expand accessibility and participation in its financial ecosystem. Overall, Caiz represents a pioneering effort to blend modern fintech innovations with the ethical and moral guidelines of Islamic finance, aiming to create a fair financial system for a new era.

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About the Job

Tasks

We are seeking an experienced Security Engineer – Smart Contract Auditor to ensure the robustness, transparency, and safety of our blockchain ecosystem. The role requires deep technical expertise in smart contracts, blockchain security, and cryptographic protocols.

Responsibilities:

Conduct comprehensive audits of smart contracts, blockchain protocols, and decentralized applications (dApps).
Identify, analyze, and remediate vulnerabilities in smart contracts, including reentrancy, overflow/underflow, logic errors, gas optimization issues, and governance risks.
Design and implement security best practices for smart contract development and deployment.
Collaborate with blockchain engineers to review architecture and propose secure design improvements.
Perform penetration testing and threat modeling specific to blockchain and DeFi environments.
Write detailed audit reports, including vulnerabilities, risk assessments, and recommendations.
Monitor deployed contracts and blockchain infrastructure for abnormal activities and potential exploits.
Stay updated on the latest blockchain security threats, vulnerabilities, and industry best practices.
Educate internal teams on security awareness, safe coding practices, and emerging risks.

Requirements

Experience:

3–5 years of experience in blockchain security, smart contract auditing, or cybersecurity roles.
Strong understanding of Ethereum, Solidity, and EVM-based chains (experience with other chains like BSC, Polygon, Polkadot, or Layer-2s is a plus).
Hands-on experience auditing DeFi protocols, staking contracts, NFTs, or DAO governance contracts.
Proven experience with blockchain security tools (e.g., MythX, Slither, Echidna, Foundry, Tenderly, Hardhat, Truffle).
Knowledge of cryptographic principles (hashing, signatures, zero-knowledge proofs) and applied security.
Experience publishing or contributing to audit reports, whitepapers, or security advisories is a strong plus.
Expert in Solidity, smart contract development, and debugging.
Strong analytical and problem-solving skills for identifying complex vulnerabilities.
Proficiency in penetration testing, fuzzing, and formal verification methods.
Ability to clearly document findings and communicate with both technical and non-technical stakeholders.
Familiarity with secure coding guidelines and blockchain threat landscapes.

Level of studies: Bachelor’s or Master’s degree in Computer Science, Cybersecurity, Cryptography, or related technical field.

Language Requirements: Fluent in English

Benefits

Benefits at Caiz:

Competitive Financial Compensation: We offer financial benefits that reflect the value of your work and dedication.
Work Flexibility: Enjoy the flexibility to work from home, the office, or even abroad.
Annual Holidays: Generous paid time off to help you maintain a healthy work-life balance.
Relocation Assistance: We provide relocation support for employees moving to new locations.
Professional Development: Opportunities for training, certifications, and career growth.
Employee Recognition: Programs to celebrate and reward your achievements and contributions.
Inclusive & Collaborative Culture: A supportive and diverse work environment where your voice matters.
Diversity, Equality, and Inclusion: We are committed to fostering a workplace that values diversity and promotes equality and inclusion for all employees.

Don’t miss this opportunity – apply now and be part of the Caiz revolution.