Backend Security Engineer - Remote

October 7, 2026

Senior Software Engineer – Cybersecurity & Backend Job Type Contractor (15 hrs/week) Location Remote Schedule Flexible Required Skills • Python 3, Java, Rust, TypeScript, C++ • Algorithms & Data Structures • Bug Fixing & Feature Implementation • Codebase Refactoring • Performance Optimization • Penetration Testing • Security Auditing Job Summary Work on challenging coding and security tasks designed to help train next-generation AI systems. You'll create realistic coding problems, implement features and bug fixes, and build deterministic verifiers to evaluate solutions. What We're Looking For • Strong backend development experience in Java, Node.js, Go, Rust, TypeScript, Python, C++, or similar • Experience building scalable services and APIs • Strong debugging, performance optimization, and automated testing skills • Solid code review and software engineering practices • Experience with cybersecurity, penetration testing, vulnerability assessment, or security audits • Familiarity with secure coding, AppSec, OWASP, and CWE is a plus Responsibilities • Develop and debug complex software • Implement new features and resolve software issues • Refactor and optimize existing codebases • Create realistic coding and security tasks • Develop reliable deterministic verification systems • Identify vulnerabilities and potential security risks • Apply strong algorithms, data structures, and software engineering principles Preferred Qualifications • Proven backend development experience • Cybersecurity or security engineering background • Experience with penetration testing or security audits • Strong understanding of algorithms, data structures, and computer science fundamentals • Excellent analytical, problem-solving, and technical communication skills

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