Core Capabilities & Experience

• Proven track record of hands-on vulnerability discovery and security testing across blockchain protocols, smart contracts, nodes, and APIs, with a demonstrated ability to identify deep architectural bugs beyond automated scanning.
• Strong threat modeling and security architecture review experience applied directly to distributed cryptographic systems.
• Direct experience assessing cross-chain protocols, threshold signature schemes, or other cryptographic systems with complex trust assumptions, including the auditing or breaking of cross-chain bridges.
• Deep working knowledge of applied cryptography (e.g., BLS signatures, pairing-based schemes, polynomial commitments, and Fiat-Shamir constructions) and the ability to reason about cryptographic failure modes in production environments.
• Ability to analyze trust model tradeoffs, including state proof, multisig, and oracle attestation models, and evaluate their impact on the broader attack surface.

Functional & Technical Expertise

• Mastery of blockchain security and secure coding practices across both EVM-compatible and non-EVM chains.
• Proficiency with security testing tooling, including static analysis, dynamic analysis, and fuzzing, alongside experience developing custom fuzzing harnesses or security test infrastructure.
• Strong ability to read, review, and audit cryptographic code written in Rust and/or Java.
• Clear understanding of memory safety, constant-time correctness, secret handling, and the unique security risks at JNI boundaries.

Preferred Qualifications

• Experience designing and operating grammar-aware fuzzing campaigns against gRPC, JSON-RPC, or protocol-level endpoints.
• Experience building classifier pipelines to isolate security signals from noise, or building custom security automation tooling.
• Prior security work focused on Ethereum consensus clients or production threshold signature systems.
• Experience integrating AI-assisted workflows into security review and triage processes.

Benefits

• Competitive salary and compensation package.
• Opportunity to work at the forefront of enterprise Web3 infrastructure and cryptographic innovation.
• Collaborative, high-caliber engineering environment focused on solving complex, large-scale distributed systems challenges.
• Flexible working arrangements and comprehensive professional growth opportunities.

Interview Process

The interview pipeline consists of the following stages:

• Recruiter / HR Screening Call
• Hiring Manager Interview
• Technical Interview
• Technical Assignment
• Final Interview

Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search.

Commitment to Equality and Accessibility:

At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job-advert in an accessible format please let us know at the earliest opportunity by emailing human-resources@mlabs.city.

MLabs Ltd collects and processes the personal information you provide such as your contact details, work history, resume, and other relevant data for recruitment purposes only. This information is managed securely in accordance with MLabs Ltd’s Privacy Policy and Information Security Policy, and in compliance with applicable data protection laws. Your data may be shared only with clients and trusted partners where necessary for recruitment purposes. You may request the deletion of your data or withdraw your consent at any time by contacting legal@mlabs.city.