Application Security Engineer x2

Valiant Technologies LLC; Weehawken (NJ); On-site; USD 96,000 - 131,000; Full time

Job summary

Valiant Technologies LLC is seeking an Application Security Engineer to focus on in-depth software security analysis, especially of third-party applications via a primarily Windows environment with some Linux. The role emphasizes building foundational security reasoning from first principles and requires strong reverse engineering capabilities.

The position involves hands-on work, collaboration with internal teams, and the ability to explain complex concepts clearly.

Qualifications

• Deep understanding of low-level computer fundamentals across OSes.
• Hands-on experience with hardware/OS concepts or performance analyses.
• Experience with emulation/virtualization and testing (e.g., QEMU).

Responsibilities

• Perform reverse engineering on binaries and analyze networks to uncover vulnerabilities and exfiltration.
• Familiarity with reverse engineering tools; building custom tooling aligns with the role.
• Ensure software complies with internal security guidelines and policies.
• Collaborate with domain experts, platform teams, support, and end users to deliver findings and practical mitigations.

Skills

Low-level systems knowledge

Reverse engineering

Binary Ninja familiarity

Tools

Binary Ninja

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Job Title: Application Security Engineer x2

Location: Weehawken, NJ

Duration: 8 Months + Extension

Bill Rate: $82/hour (C2C)

Job Type: W-2, 1099, C2C

Client: To Be Discussed Later

Work Authorization: US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Description

• Position: Security Consultant
• Core Focus: Software security analysis heavily emphasizing third-party applications introduced by employees.
• Primary Environment: Predominantly Windows software, with some Linux.

Primary Requirement: First-Principle Systems Knowledge

• Candidates must deeply understand how a computer functions at a low level, regardless of the operating system or software stack running on it.
• The ability to explain core concepts fundamental to modern computing is mandatory, as this foundation is required to effectively reason about security.
• Hiring managers will actively filter for this low-level understanding by looking for hands-on work experience, projects, or hobbies in the following areas:
• Compiler or Operating System design.
• Computer hardware design (especially secure hardware), including hardware interfacing and instrumentation.
• Code optimization.
• Emulation or Virtualization implementation and design (e.g., utilizing frameworks like QEMU for advanced testing or manipulation). Note: Merely using virtualization technologies as an end-user is insufficient.
• Vintage computing.

Technical Responsibilities & Capabilities

• Reverse Engineering & Analysis: Perform reverse engineering on binaries and conduct network analysis (e.g., interception, decryption) to uncover vulnerabilities, hidden data exfiltration, or unauthorized behaviors.
• Tooling: Familiarity with reverse engineering tools like Binary Ninja is a plus, but tool-agnostic capabilities are expected. Candidates who build custom offensive tooling, fuzzing frameworks, or automated testing protocols strongly align with the desired profile.
• Security Validation: Ensure software complies with internal security guidelines and internal policies (e.g., restricting unauthorized network connections).
• Collaboration: Work closely with internal domain experts, platform engineering teams, frontline support, and end users to deliver findings and suggest practical, balanced workarounds.

Experience & Qualifications

• Experience Level: 3–5+ years of relevant experience (mid-to-senior level).
• Valued Backgrounds: Prior experience in network/system administration, broad technical understanding of process flows, or participation in Capture-the-Flag (CTF) competitions.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.