Remote AppSec Engineer - Part-Time, Flexible Hours

Appsierra Group; American Samoa; On-site; USD 58,000 - 192,000; Part time

Job summary

Appsierra Group is seeking an Applications Security Engineer (AppSec) to join our remote, part-time team (~15 hours/week). The role blends backend software engineering with security practices to evaluate and improve AI systems.

You will design real-world coding tasks, build verifiers, and review code across languages, while identifying vulnerabilities and applying secure coding principles. The position emphasizes practical AppSec experience, vulnerability assessment, and secure coding, with

Qualifications

• Strong backend development experience with major languages.
• Experience building scalable services and APIs.
• Strong debugging, performance optimization, and automated testing skills.
• Solid code review and software engineering judgment.
• Practical AppSec or cybersecurity experience.

Responsibilities

• Design realistic coding tasks involving feature implementation, bug fixing, refactoring, and application security.
• Build deterministic verifiers that accept valid solutions and reject incorrect ones.
• Work with backend codebases and scalable services across languages like Java, Node.js, Go, Rust, TypeScript, Python, and C++.
• Debug complex software issues and identify performance bottlenecks.
• Review code for correctness, maintainability, performance, and security.
• Identify vulnerabilities and assess security risks in applications.
• Apply secure coding principles and modern AppSec practices.
• Document reasoning, expected behavior, vulnerabilities, and evaluation criteria.
• Create high-quality inputs to improve AI coding and software systems.

Skills

Backend development

API development

Debugging

Performance optimization

Automated testing

Code review

Application security

Secure coding

Penetration testing

Vulnerability assessment

OWASP CWE

Algorithms & data structures

Problem solving

Technical communication

Tools

Java

Node.js

Go

Rust

TypeScript

Python

C++

Job description

Appsierra Group is seeking an Applications Security Engineer (AppSec) to join our remote, part-time team (~15 hours/week). The role blends backend software engineering with security practices to evaluate and improve AI systems.

You will design real-world coding tasks, build verifiers, and review code across languages, while identifying vulnerabilities and applying secure coding principles. The position emphasizes practical AppSec experience, vulnerability assessment, and secure coding, with