Software Engineer

MATRIX TECH PTE. LTD.; Singapore; On-site; SGD 60,000 - 120,000; Full time

Job summary

MATRIX TECH PTE. LTD. is hiring a new-graduate Software Systems Design Engineer focused on blockchain security and protocol design. You will explore cryptography, distributed systems, and attacker-minded design to harden wallet and core systems against protocol-level threats.

You will analyze protocols like Ethereum, Cosmos, Substrate, Solana, and contribute to defense-in-depth architecture, threat modeling, and security audits, with a strong emphasis on practical engineering work.

Qualifications

• Master's degree or above preferred in Computer Science, Cryptography, or Network/Cyber Security.
• New graduate or up to 2 years of work experience.
• Strong command of one systems programming language: Java, Go, Rust or C++.
• Familiar with threat modeling, secure coding standards, pentesting mindset, supply-chain security.
• Experience in distributed systems design, concurrency and performance optimization.

Responsibilities

• Analyze and evaluate how mainstream blockchain protocols work under the hood and redesign wallet systems grounded in secure cryptographic mechanisms.
• Develop hardening and mitigation plans for the wallet system against protocol-level vulnerabilities.
• Drive security-requirement-driven architecture changes and defense-in-depth for critical modules.
• Track cutting-edge blockchain attack techniques and translate research into ship-ready improvements.
• Participate in security audits of internal systems and open-source dependencies, driving remediation.

Skills

Systems programming

Distributed systems

Security mindset

Threat modeling

Code reviews

Education

Master's degree or above in Computer Science, Cryptography, or Network/Security

Job description

About the Role

We're hiring a new-graduate Software Systems Design Engineer focused on blockchain security and protocol design. You'll work at the intersection of cryptography, distributed systems, and adversarial security — redesigning and hardening wallet and core systems against protocol- and architecture-level threats. This is a builder's role for someone who thinks like an attacker and designs like an engineer.

Protocol Analysis & Design

• Analyze and evaluate how mainstream blockchain protocols work under the hood (Ethereum/EVM, Cosmos SDK, Substrate, Solana, etc.), and redesign wallet systems grounded in secure cryptographic mechanisms.
• Develop hardening and mitigation plans for the wallet system against known protocol-level vulnerabilities and emerging risks.

System Security Re-architecture & Hardening

• Drive security-requirement-driven re-architecture and maintenance of existing software systems.
• Embed security assumptions at the architecture level, designing and implementing defense-in-depth for critical modules to reduce single points of failure and ambiguous trust boundaries.

Research, Audit & Response

• Track cutting-edge blockchain attack techniques and defenses, and turn research into shippable system improvements.
• Participate in or lead security audits of internal systems and open-source dependencies, driving remediation and architectural improvements.

Background & Experience

• Master's degree or above preferred in Computer Science, Cryptography, or Network/Cyber Security.
• New graduate or up to 2 years of work experience.

Core Technical Skills

• Development & architecture: Strong command of at least one systems-programming language among Java / Go / Rust / C++. Proficient in distributed systems design, concurrency models, and performance optimization.
• Security domain knowledge: Familiar with threat modeling, secure coding standards, penetration-testing mindset, and supply-chain security.

Key Soft Skills

• Security mindset & risk thinking: Operates on a "zero trust" principle by default and reasons systematically about attack surfaces.
• Analysis & abstraction: Translates complex, ambiguous security requirements into clear, verifiable technical architecture and module designs.
• Engineering craft & influence: Builds a security culture across the team through design docs, code reviews, and tech talks.

Preferred Qualifications

• Deep understanding of the full technical stack of at least one mainstream blockchain (networking, consensus, execution, storage). Strong grasp of smart contract security and common vulnerability patterns.
• Practical command of how public-key cryptography, hash functions, zero-knowledge proofs, and threshold signatures apply — and where their risks lie — in real systems.