1mo
Save
Mark Applied
Hide
Senior Security Researcher
Santa Clara, California, United States
$140k-$226k/yr OnsiteFull Time
3+ YOEBachelor's degree or equivalent experience, 3+ years in offensive security or vulnerability research, experience with reverse engineering/fuzzing/exploit development, familiarity with penetration testing, strong OS/network/application security knowledge.
Large Language Models (LLMs), LLMs, Reinforcement Learning, RLHF, Supervised Fine-Tuning (SFT), AI agents, fuzzers
1w
Save
Mark Applied
Hide
Principal Security Researcher
Redmond or San Francisco
$143k-$275k/yr HybridFull Time
3+ YOEPrincipal-level threat operations and research experience, strong incident response/threat hunting skills, experience with adversary simulation, Kusto/KQL proficiency, and ability to meet Microsoft security screening.
Microsoft Defender, Kusto, KQL, MITRE ATT&CK
1mo
Save
Mark Applied
Hide
Security Researcher
Kyiv or Ukraine or New York City or Israel
RemoteFull Time
5+ YOE5+ years cybersecurity research experience (supply-chain attacks, malware analysis), familiarity with npm/PyPI/Maven, production software delivery, SDLC and CI/CD, and ability to leverage AI tools.
npm, PyPI, Maven, CI/CD
3mo
Save
Mark Applied
Hide
Security Researcher
Miami, Florida, United States
HybridFull Time
3+ YOE3–5 years in cybersecurity; malware analysis and threat research on Windows/macOS; experience with YARA, Sigma; vulnerability lifecycle knowledge; security tooling familiarity.
YARA, Sigma, Binary Ninja, WinDbg, Sysinternals, Mac Monitor, Python, PowerShell, Bash
1w
Save
Mark Applied
Hide
Senior AI Security Researcher
Durham or Texas or North Carolina or Virginia or Washington or California
$224k-$431k/yr RemoteFull Time
12+ YOE12+ years in AI security, cybersecurity research, or applied ML; demonstrated research impact; bachelor's in CS/ML/cybersecurity or equivalent; experience leading AI-security research and building production security ML systems.
Python, PyTorch, JAX, TensorFlow, scikit-learn, Pandas, NumPy, Spark, BigQuery
1mo
Save
Mark Applied
Hide
Offensive Security Researcher, Kernel & Embedded Security
New York City, New York, United States
OnsiteFull Time
Conduct offensive security research to find and fix vulnerabilities across Apple products to protect users; work as part of a security engineering and research team.
2w
Save
Mark Applied
Hide
Senior Security Researcher
New York or United States
$135k-$165k/yr HybridFull Time
Deep knowledge of internet protocols, javascript signal collection, and adversarial techniques; proven scripting experience with Python and JavaScript; experience researching fraud/abuse in Ad Tech or cybersecurity; strong analytic and communication skills.
Selenium, Playwright, Puppeteer, Python, JavaScript, SQL
2mo
Save
Mark Applied
Hide
Security Researcher, Agentic AI Threats
San Francisco, California, United States
$293k-$405k/yr HybridFull Time
Strong security, systems, and software engineering skills; cloud, OS, containers, and CI/CD experience; ability to design security controls and run evaluations; collaborate with stakeholders.
Cloud, Containers, CI/CD, Operating Systems, Security Tools, Penetration Testing
2mo
Save
Mark Applied
Hide
RFP -- Security Researcher
United States
$80/hr RemoteContract, Part Time
3+ YOEContract security researcher for SecureDrop; remote; up to 30 hrs/week; six-month engagement; USD 80/hr.
Python, Typescript, Rust, Linux, AppArmor, SELinux, Qubes OS, Tails, Tor, OpenPGP
1w
Save
Mark Applied
Hide
Senior AI Security Researcher
Durham or North Carolina or Texas or Virginia or Washington or California
$224k-$431k/yr HybridFull Time
12+ YOE12+ years in AI/security research or related fields; ability to build research systems in Python and modern ML tooling; strong cybersecurity foundation; BS or equivalent in CS/ML/cybersecurity.
Python, PyTorch, JAX, TensorFlow, scikit-learn, Pandas, NumPy, Spark, BigQuery
1w
Save
Mark Applied
Hide
Network Security Researcher
Pittsburgh or Arlington
OnsiteFull Time
2+ YOEAdvanced degree in computer science or related field with 2–8 years relevant experience; strong network fundamentals, threat research, proficiency in at least one language (Python, Go, Ruby, C, Java, Scala), experience with network telemetry and large datasets, and ability to obtain Department of War security clearance.
Python, Go, Ruby, C, Java, Scala, YAF, Zeek, Suricata
2w
Save
Mark Applied
Hide
Security Researcher
Wilmington, Delaware, United States
RemoteFull Time
5+ YOE5+ years in cybersecurity (SOC/SIEM/Threat Intel/Cloud Security), experience with SaaS security, large-scale log analysis, SQL (ClickHouse), familiarity with SIEM/XDR (Splunk, Sentinel, Chronicle).
SQL, ClickHouse, Splunk, Sentinel, Chronicle, SIEM, XDR, Okta, Azure AD, Google IAM, APIs
1mo
Save
Mark Applied
Hide
Principal Product Security Researcher
United States
$201k-$226k/yr RemoteFull Time
Lead product security research, translate threat intel into strategic roadmaps, and drive cross-functional security initiatives.
Threat intelligence, Security research, Risk management, Secure architecture, Product security tooling
2mo
Save
Mark Applied
Hide
Senior Security Researcher
Columbus or Herndon
OnsiteFull Time
4+ YOETS/SCI eligibility; Bachelor's in a technical field or 4 years related experience; reverse engineering tools; Linux; C/assembly; vulnerability research; exploit development.
Ghidra, Binary Ninja, IDA, Disassemblers, Debuggers, Fuzzers, Linux, Networking, C, Assembly, ARM, MIPS, x86
2w
Save
Mark Applied
Hide
Public Facing Security Researcher
United States
RemoteFull Time
3+ YOE3+ years in Web3, strong public presence and speaking experience, technical expertise in Web3 security, comfortable engaging community and media.
1w
Save
Mark Applied
Hide
Senior Network Security Researcher
Pittsburgh or Arlington
OnsiteFull Time
5+ YOEAdvanced degree or equivalent experience in CS or related field; subject-matter expertise in network telemetry, threat research, scripting (e.g., Python/Go), and large-scale data analysis; ability to travel and obtain Department of War security clearance.
Python, Go, Ruby, C, Java, Scala, YAF, Zeek, Suricata, PCAP
1mo
Save
Mark Applied
Hide
Security Researcher - Bot Detection Adversarial Research
Israel or United States
RemoteFull Time
5+ YOE5+ years R&D developer/researcher/tester experience; deep knowledge of HTTP & TLS; programming in JavaScript/TypeScript/Python/C++; penetration testing or offensive security certs (OSCP, OSEP); reverse engineering and anti-bot experience; fluent English.
JavaScript, TypeScript, Python, C++, HTTP, TLS
3w
Save
Mark Applied
Hide
Senior Security Researcher (200041077)
United States
OnsiteFull Time
N/A
3mo
Save
Mark Applied
Hide
Geriatrics Researcher
Salt Lake City, Utah, United States
OnsiteFull Time
Ph.D. with established or early-stage research career and secured funding.
1mo
Save
Mark Applied
Hide
Senior Researcher, AI Security (Pittsburgh, Pennsylvania, US)
Pittsburgh, Pennsylvania, United States
OnsiteFull Time
PhD in Computer Science (or related), strong publication record in top ML/AI/security venues, expertise in LLM-agentic systems, robotics security, federated learning or multi-agent systems, and rapid prototyping experience.
Python, TypeScript
Explore Jobs