BLOCKCHAIN DEVELOPER (ON-SITE)

BLOCKCHAIN DEVELOPER (ON-SITE LISBON)

Portuguese company hires for on-site position

📍 Location: Lisbon - Entrecampos, Portugal

⚠ Candidates must already live in Portugal

🗣️ Language Requirements: Fluent in Portuguese and English (min B2+)

🕓 Experience Levels: 4+ years

⚠ Instructions: Please send your CVs in English and make sure to include all skills and experience that match the requirements of the opportunity. This will significantly increase your chances of success

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Role Overview

We are seeking an experienced Blockchain Developer to design and implement secure, resilient, and innovative blockchain-based solutions in a cybersecurity-focused environment. This role is fully on-site in Lisbon and requires strong technical experience with smart contracts, blockchain architectures, and secure coding standards.

⚠ Important: All mandatory requirements listed below must be clearly stated in the CV for proper evaluation.

Responsibilities

• Design, develop, and maintain blockchain-based systems focused on security, transparency, and verifiability.
• Implement, test, and audit smart contracts, ensuring integrity, performance, and protection against vulnerabilities.
• Collaborate with cross-functional teams to integrate blockchain components into existing platforms and services.
• Research and evaluate emerging blockchain technologies and propose innovative solutions aligned with business and security needs.
  
  

Mandatory Requirements

(These must appear explicitly in the CV)

• Solid experience in blockchain development, including consensus mechanisms and blockchain security fundamentals.
• Strong proficiency in Solidity, Rust, or similar blockchain-oriented programming languages.
• Proven experience applying secure coding practices in blockchain environments.
• Bachelor’s degree in Computer Science or a related field (preferred but not mandatory).
• English proficiency: B2 or C1 (spoken and written).
  
  

Nice to Have

• Experience with zero-knowledge proofs (ZKP) or zero-trust security ecosystems.
• Background in cybersecurity, cryptography, or distributed systems.
  
  

Work Model

• 90–100% on-site in Entrecampos (Lisbon) — mandatory.
• Full-time position in the cybersecurity sector.
  
  

Keywords That Must Be in the CV

• Blockchain Development
• Smart Contracts
• Solidity / Rust
• Consensus Algorithms
• Blockchain Security
• Secure Coding Practices
• English B2/C1
• On-site Lisbon
  
  

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