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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