Senior Security Research Engineer (SecureChain)

TuxCare Inc.; Madrid; Remote; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Remote work worldwide

Flexible hours

Paid vacation 24 days per year

Private medical insurance

Co-working and gym/sports reimburse.

Education budget

Patent reward for innovative ideas

Job summary

TuxCare Inc. is seeking a Senior / Principal Security Research Engineer to launch the Security Research & Automation function of SecureChain. You will be the first engineer in a new team, building production-grade tools for research and automation.

Responsibilities include owning the malicious-code detector, extending detection with static/dynamic analysis, coordinating disclosure, and publishing evidence-backed security research with Marketing. Fully remote options available.

Qualifications

• Security research background in malware or software supply-chain research.
• Strong Python or other systems language; you build tools and pipelines that run in production.
• CI pipelines, test automation and operating services.
• Advanced written and spoken English.
• Experience with more than one package ecosystem (e.g. PyPI, npm, Maven, Go, Linux distributions).

Responsibilities

• Own SecureChain's malicious-code detector: alert review and classification, test corpus, quality benchmarks, false-positive and coverage metrics.
• Extend detection with artifact scanning, static signals, dynamic analysis and external intelligence.
• Build repeatable pipelines that discover new vulnerabilities in software that SecureChain and ELS support, with priority on high/critical risks and on EOL versions customers still use.
• Reproducing findings, proving impact and reachability, and storing evidence so another researcher can repeat the result.
• Developing AI-assisted methods to generate and test candidate fixes, and feeding them into our patch automation.
• Owning TuxCare CNA work: CVE assignment, record quality and coordinated disclosure with upstream projects.
• Preparing technical write-ups and research publications together with Marketing.

Skills

Security research

Python

CI pipelines

Static analysis

Fuzzing

AI-assisted tools

Multi-ecosystem experience

Technical reporting

English language

Job description

TuxCare provides security solutions for Linux and open-source software used by enterprise organizations. Our products help companies automate vulnerability patching, reduce downtime, maintain security and compliance, and support critical systems throughout their lifecycle. Learn more about TuxCare: tuxcare.com.

We are looking for a Senior / Principal Security Research Engineer to start the Security Research & Automation function of SecureChain.

SecureChain is TuxCare's open-source software supply chain security product. It provides packages rebuilt from verified source code, scanned for malware and supply chain risks. Learn more: tuxcare.com/securechain-for-oss.

The Mission

You will be the first engineer of a new function, with a plan to grow it to three or four people. You are a security researcher first, and you build production-quality tools and pipelines to scale your research.

The Function Has Three Goals

• Detect malicious code before SecureChain publishes a package.
• Build pipelines that find and help fix high and critical vulnerabilities in maintained and end-of-life open-source software.
• Publish useful, evidence-backed security research after coordinated disclosure.

You Will Be Responsible For

• Owning SecureChain's malicious-code detector: alert review and classification, test corpus, quality benchmarks, false-positive and coverage metrics.
• Extending detection with artifact scanning, static signals, dynamic analysis and external intelligence.
• Building repeatable pipelines that discover new vulnerabilities in software that SecureChain and ELS support, with priority on high/critical risks and on EOL versions customers still use.
• Reproducing findings, proving impact and reachability, and storing evidence so another researcher can repeat the result.
• Developing AI-assisted methods to generate and test candidate fixes, and feeding them into our patch automation.
• Owning TuxCare CNA work: CVE assignment, record quality and coordinated disclosure with upstream projects.
• Preparing technical write-ups and research publications together with Marketing.

Your First 90 Days

• Days 1-30: take over the malicious-code detector, its sample review and CNA responsibilities; inventory services, data, prompts, corpus and open work.
• Days 31-60: improve the detector and its review workflow, measure alert volume, false positives and cost; start a vulnerability-discovery pilot on 5-10 packages of one ecosystem.
• Days 61-90: expand discovery across the ecosystem, complete coordinated disclosure where applicable, publish the first research output.

Requirements

Must-haves:

• Security research background: malware or software supply-chain research, vulnerability discovery and root-cause analysis.
• Strong Python or another suitable systems language; you build tools and pipelines that run in production.
• CI pipelines, test automation and operating services.
• Practical use of static analysis, fuzzing and sandboxing.
• Heavy, daily use of AI-assisted tools in research and engineering.
• Experience with more than one package ecosystem (e.g. PyPI, npm, Maven, Go, Linux distributions).
• Clear research reports and experience with coordinated disclosure.
• Advanced written and spoken English.

Nice-to-haves

• Published CVEs, advisories or security research.
• Experience with CNA operations or vulnerability databases (CVE, OSV).

This is not a SOC analyst, compliance, penetration testing or general software development role.

Benefits

What's in it for you?

• A focus on professional development.
• Interesting and challenging projects.
• Fully remote work with flexible working hours, that allows you to schedule your day and work from any location worldwide.
• Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves.
• Compensation for private medical insurance.
• Co-working and gym/sports reimbursement.
• Budget for education.
• The opportunity to receive a reward for the most innovative idea that the company can patent.