Flow Traders is looking for a Security Engineer with a strong interest in digital assets security, crypto threats, and smart contract risk management. In this role you will be part of a highly skilled security team, learning and contributing to the safe and secure growth of Flow Traders' security operations. You will additionally support the security of our blockchain infrastructure, digital asset wallets, DeFi interactions, and smart contracts.

The successful Security Engineer at Flow Traders will be highly self-motivated, has strong attention to detail, and a clear focus on innovation and protection, with a hacker mindset. This is a unique opportunity to join a leading proprietary trading firm with an entrepreneurial and innovative culture at the heart of its business. We value quick-witted, creative minds and challenge them to make full use of their capacities.

What you will do

This role will form part of flow traders’ wider security team, with a specialty in Digital Assets. As a result, your responsibilities will be split between:

Security Engineering

• Assist in monitoring and analyzing threats relevant to the Flow Traders global operations
• Contribute to incident response and investigations involving Flow Traders systems and platforms
• Take part in the security on-call schedule for incident handling

Digital Assets Security Engineering

• Collaborate with engineering, trading, and blockchain development teams to improve secure development practices and promote secure deployment of smart contracts, nodes and supporting infrastructure
• Analyzing threats relevant to the Flow trader’s crypto ecosystem, including protocol vulnerabilities, DeFi exploits, and wallet-related risks
• Help evaluate and integrate security tools for on-chain monitoring, anomaly detection, and smart contract auditing.
• Support the security review and risk assessment of smart contracts, DeFi protocols, and blockchain applications Flow Traders interacts with
• Participate in threat intelligence gathering related to blockchain networks, new attack vectors, and emerging threat actors in the crypto space

What you need to succeed

• 1–3 years of experience in cybersecurity, with a focus on blockchain security, digital assets, or a strong interest in these areas
• Familiarity with blockchain fundamentals, digital wallets, public/private key cryptography, and transaction mechanics
• Familiarity with cybersecurity fundamentals, such as authentication protocols, threat detection, security vulnerabilities
• Understanding of common crypto threats, such as private key leakage, reentrancy, and flash loan attacks
• Familiarity with EVM based chains and Solidity. Additional exposure is a plus
• Hands-on experience with scripting or programming (e.g., Python, JavaScript) to automate tasks or analyze blockchain data
• Eagerness to learn, attention to detail, and a passion for the rapidly evolving digital asset security landscape
• Creative and independent thinking
• This role is hybrid based in our Amsterdam location

Flow Traders does not accept unsolicited resumes from any professional staffing or search firms. All resumes, and any other information identifying potential candidates, submitted to any employee at Flow Traders via-email, the Internet or directly without a valid and signed search agreement will be deemed free to contact by Flow Traders without any restrictions and no placement fee of any kind will be paid in the event the candidate is hired by Flow Traders.