Application Security Engineer / Penetration Tester
VerteX Tech • Security, Colorado, United States
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Role & seniority
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Graduate / early-career to mid-level (mix of ~1+ to 3+ years)
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Potential tracks: Software Engineering (full-stack), AppSec/Pentest, QA automation, DevOps/IT basics, IT Project Management, Java Core/OOP
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Work includes full-time with occasional overtime for global clients
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Stack/tools (from requirements)
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Backend/full-stack: Node.js, TypeScript, Python, PHP, .NET/C#, Java
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AppSec/Pentest: Burp, SAST/DAST, security testing tools, AI/LLM-assisted auditing
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Testing/automation: Selenium, Appium, TestNG, JUnit (plus automated test scripts)
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Web/front-end (basic/varies): HTML/CSS/JS, “modern front-end technologies”
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Infra/engineering basics: Linux, networking fundamentals, web deployment, cloud familiarity
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Dev workflow: Git, CI/CD basics, Terraform basics, scripting
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Other: Golang (concurrency), HTTP knowledge, SQL/relational DBs
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Top 3 responsibilities
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Build/maintain web/app solutions with scalability and security in scope
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Develop automated testing (UI/mobile where relevant) and improve test coverage
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Security validation and reporting (web/API/desktop) including use of security tools and AI-assisted auditing
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Must-have skills
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CS background or degree aligned to tech roles (CS mentioned; others include IT/Philology/Comms/Marketing)
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English proficiency: B2/C1 (or Upper-Intermediate/B2 depending on track)
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**Analyt
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Full Description
We seek a tech-savvy (CS background) graduate with B2/C1 English, strong analytical skills, and a client-oriented mindset, ready for full-time work and occasional overtime with global clients.
3+ years of software engineering experience; proficiency in Node.js, TypeScript, Python, PHP, .NET/C#, or Java; strong full-stack skills, hands-on AI coding tools, problem-solving, independent work, B2 English, and willingness to work with modern front-end technologies
3+ years in AppSec/Pentest (Web, API, Desktop), proficiency in security tools (Burp, SAST/DAST, RE), and expertise in leveraging AI/LLMs for automated auditing, combined with strong English reporting skills and the ability to work independently.
2+ yrs exp, Arabic native + Upper-Intermediate English, degree in Philology/Comms/Marketing, skilled in multi-format content creation for various platforms
Web application development in various domain areas with an emphasis on ensuring scalability and web security
Create, maintain, and enhance automated test scripts using various testing frameworks and tools, such as Selenium, Appium, TestNG, JUnit, etc
Strong Linux knowledge, networking fundamentals, web deployment experience, cloud familiarity, Git/Terraform/CI/CD basics, scripting skills.
1+ year of IT experience with strong Golang skills (including concurrency), excellent HTTP knowledge, experience with HTML/CSS/JS, SQL and relational DBs, Git proficiency, and Upper-Intermediate (B2) English.
1+ year experience in IT project management, fluent English, strong SDLC knowledge, client-oriented mindset, eagerness to learn, openness to feedback, and a positive never-give-up attitude.
Excellent knowledge of Object-Oriented Programming principles, solid understanding of Java Core functionalities.
