Backend Security Engineer | Remote - Contract

Xperteez Technology • ,

7h • Remote

About The Position

In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters. You'll create realistic, interesting and challenging coding tasks for AI to solve involving feature implementation and bug fixes, and implement deterministic verifiers that accept reasonable valid solutions and reject everything else.

Requirements

• Python3
• JAVA
• Rust
• Algorithms
• Basics C++
• Typescript
• bug fixing
• feature implementation
• codebase refactoring
• performance optimization
• pentesting
• Security audit
• Strong backend experience in Java, Node.js, Go, Rust, Typescript, Python, C++ or similar
• A track record building scalable services and APIs
• Comfort with debugging, performance work and automated testing
• Solid code review instincts

Nice To Haves

• A cybersecurity or SecOps background is a big plus — secure coding, appsec, pentesting, vulnerability assessment, OWASP/CWE, or security-focused reviews.
• Proven experience in backend development, with a track record of delivering high-quality and performant projects.
• Background in cybersecurity, such as penetration testing, vulnerability assessment, or security code reviews.
• Demonstrated success in identifying and resolving software bugs and system bottlenecks.
• Experience with codebase refactoring and implementing complex features in large-scale applications.
• Strong understanding of algorithms, data structures, and foundational computer science concepts.
• Excellent analytical, problem-solving, and technical communication skills.

Responsibilities

• Create realistic, interesting and challenging coding tasks for AI to solve involving feature implementation and bug fixes.
• Implement deterministic verifiers that accept reasonable valid solutions and reject everything else.

Benefits

• Compensation is output-based; experts are paid per task that meets the project specifications.
• Flexible, you pick the hours and days (including weekends if desired)

What This Job Offers

• Job Type: Part-time
• Career Level: Senior
• Education Level: No Education Listed