Security Research

Transmit Security, Tel Aviv-Yafo, Gush Dan, Israel +1

The role

Transmit Security is a top player in its field and is heading into an exciting year. In this role, you will take an integral part in researching, designing, and improving advanced fraud and abuse detection capabilities for a cutting-edge SaaS product.

We are looking for a hands-on security researcher who combines an attacker mindset, fraud-domain curiosity, strong technical depth, and data analysis skills. You will investigate real-world fraud patterns, reproduce attacker techniques, analyze telemetry, enrich our data collection capabilities, discover new security signals, and work closely with product, data, and engineering teams to turn research insights into production-grade detection and prevention mechanisms.

What you need

At least 3 years of experience in security research, fraud research, detection engineering, threat research, mobile security research, browser security research, or a similar hands-on technical role.
Bachelor’s degree in Computer Science, Cybersecurity, Data Science, or a related field or equivalent hands-on experience.
Strong hands-on experience with at least one of the following areas:
Desktop or mobile browsers, browser APIs, browser automation, browser fingerprinting, web signals, or client-side web security.
Native mobile applications for Android or iOS, mobile OS behavior, device signals, emulators, mobile automation, app instrumentation, or mobile security.
Strong understanding of web technologies, mobile technologies, APIs, application behavior, and modern attack techniques.
Strong Python skills and experience building research tools, automation, data analysis workflows, detection prototypes, or feature engineering pipelines.
Experience analyzing messy real-world data, investigating anomalies, validating hypotheses, and drawing practical conclusions from incomplete information.
Familiarity with machine learning training and validation concepts, such as train/test split, validation sets, overfitting, leakage, feature quality, precision/recall, false positives, false negatives, and model evaluation.
Ability to produce data features in a structured, reliable, and model-friendly way.
Ability to think like an attacker while designing reliable, scalable, and explainable defenses.
Strong problem-solving skills, independence, persistence, and a “getting things done” attitude.
Excellent communication and interpersonal skills.
Ability to work closely with engineering, product, and data science teams and translate research insights into practical product capabilities.

Advantages

Experience with both browser-based and mobile-native research.
Experience with fraud domains such as account takeover, new account fraud, identity theft, money mule activity, payment fraud, or first-party fraud.
Knowledge of bots, automation frameworks, credential stuffing, scraping, and anti-detection techniques.
Experience with browser internals, JavaScript runtime behavior, DOM APIs, WebView behavior, browser automation, headless browsers, or browser anti-detection techniques.
Experience with mobile app lifecycle, permissions, sensors, networking, storage, mobile identifiers, rooted/jailbroken devices, hooking, instrumentation, repackaging, or anti-tampering techniques.
Experience with browser fingerprinting, mobile fingerprinting, device intelligence, behavioral biometrics, or client-side telemetry.
Experience with malware analysis, phishing kits, remote access tools, proxy/VPN infrastructure, or underground fraud ecosystems.
Experience with detection quality measurement, false-positive analysis, rule tuning, model evaluation, feature evaluation, or production monitoring.
Experience using notebooks, pandas, SQL, data visualization tools, or other analysis environments for research and validation.
Experience working with data scientists, ML engineers, or ML training pipelines.

#LI-TL1 #LI-Hybrid

Security Research

The role

Security Research

The role

What you will do

What you need

Advantages

About Transmit Security

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