Remote | Backend Security Engineer — \$30–\$100/hour

About the position

We are sharing a specialised consulting opportunity for experienced Backend Security Engineers with strong expertise in backend development, secure coding, application security, penetration testing, vulnerability assessment, debugging, and software quality to contribute to an advanced AI training and software-engineering evaluation project. Selected professionals will create realistic coding tasks involving feature implementation, bug fixing, and security-sensitive backend scenarios, while building deterministic verifiers that distinguish valid solutions from incorrect or unsafe implementations. No prior experience in AI is required.

Responsibilities

  • Develop and evaluate backend services using Java, Node.js, Go, Rust, TypeScript, Python, C++, or similar languages
  • Apply secure-coding principles across realistic software-engineering scenarios
  • Review backend architectures for reliability, scalability, and security
  • Identify implementation choices that introduce operational or security risk
  • Apply strong engineering judgement across production-style codebases
  • Evaluate code for application-security weaknesses and vulnerable patterns
  • Apply experience with penetration testing, vulnerability assessment, and security reviews
  • Identify issues aligned with common OWASP and CWE categories
  • Assess whether proposed solutions introduce exploitable behaviour or unsafe assumptions
  • Provide clear technical reasoning around identified security issues
  • Design challenging coding tasks involving feature implementation and bug fixes
  • Define clear technical requirements, constraints, and expected behaviours
  • Implement robust features within existing or unfamiliar codebases
  • Ensure tasks allow reasonable valid implementation approaches
  • Apply algorithms, data structures, and sound software-engineering principles
  • Diagnose complex software defects and identify root causes
  • Resolve bugs and system bottlenecks across varied backend systems
  • Refactor existing code to improve clarity, maintainability, and reliability
  • Optimise performance while preserving correct system behaviour
  • Validate changes through automated testing and structured technical review
  • Build deterministic verifiers for coding tasks and submitted solutions
  • Ensure verification accepts valid implementations while rejecting incorrect outputs
  • Develop tests covering expected behaviour, edge cases, and failure conditions
  • Review code for correctness, maintainability, performance, and security
  • Document technical reasoning and evaluation decisions clearly

Requirements

  • Strong professional experience in backend software engineering
  • Expertise in Java, Node.js, Go, Rust, TypeScript, Python, C++, or a comparable language
  • Proven experience building scalable services and APIs
  • Strong background in secure coding, application security, or SecOps
  • Experience with penetration testing, vulnerability assessment, or security audits
  • Familiarity with OWASP, CWE, and common software-security weaknesses
  • Strong debugging, automated-testing, and performance-optimisation skills
  • Experience implementing complex features in production codebases
  • Strong code-review instincts and attention to software quality
  • Experience refactoring mature or large-scale systems
  • Solid understanding of algorithms, data structures, and core computer-science concepts
  • Excellent analytical, problem-solving, and technical communication skills
  • Ability to work independently and apply professional judgement without outside assistance

Nice-to-haves

  • No prior experience in AI is required.

Benefits

  • Independent contractor engagement
  • Fully remote
  • Flexible schedule; contributors may choose their working hours and days, including weekends
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Common Interview Questions And Answers

1. HOW DO YOU PLAN YOUR DAY?

This is what this question poses: When do you focus and start working seriously? What are the hours you work optimally? Are you a night owl? A morning bird? Remote teams can be made up of people working on different shifts and around the world, so you won't necessarily be stuck in the 9-5 schedule if it's not for you...

2. HOW DO YOU USE THE DIFFERENT COMMUNICATION TOOLS IN DIFFERENT SITUATIONS?

When you're working on a remote team, there's no way to chat in the hallway between meetings or catch up on the latest project during an office carpool. Therefore, virtual communication will be absolutely essential to get your work done...

3. WHAT IS "WORKING REMOTE" REALLY FOR YOU?

Many people want to work remotely because of the flexibility it allows. You can work anywhere and at any time of the day...

4. WHAT DO YOU NEED IN YOUR PHYSICAL WORKSPACE TO SUCCEED IN YOUR WORK?

With this question, companies are looking to see what equipment they may need to provide you with and to verify how aware you are of what remote working could mean for you physically and logistically...

5. HOW DO YOU PROCESS INFORMATION?

Several years ago, I was working in a team to plan a big event. My supervisor made us all work as a team before the big day. One of our activities has been to find out how each of us processes information...

6. HOW DO YOU MANAGE THE CALENDAR AND THE PROGRAM? WHICH APPLICATIONS / SYSTEM DO YOU USE?

Or you may receive even more specific questions, such as: What's on your calendar? Do you plan blocks of time to do certain types of work? Do you have an open calendar that everyone can see?...

7. HOW DO YOU ORGANIZE FILES, LINKS, AND TABS ON YOUR COMPUTER?

Just like your schedule, how you track files and other information is very important. After all, everything is digital!...

8. HOW TO PRIORITIZE WORK?

The day I watched Marie Forleo's film separating the important from the urgent, my life changed. Not all remote jobs start fast, but most of them are...

9. HOW DO YOU PREPARE FOR A MEETING AND PREPARE A MEETING? WHAT DO YOU SEE HAPPENING DURING THE MEETING?

Just as communication is essential when working remotely, so is organization. Because you won't have those opportunities in the elevator or a casual conversation in the lunchroom, you should take advantage of the little time you have in a video or phone conference...

10. HOW DO YOU USE TECHNOLOGY ON A DAILY BASIS, IN YOUR WORK AND FOR YOUR PLEASURE?

This is a great question because it shows your comfort level with technology, which is very important for a remote worker because you will be working with technology over time...

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