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# Cyber Security Engineer

- **Company:** Búsqueda Avanzada
- **Location:** Madrid, Spain (Remote available)
- **Salary:** €62,400.0
- **Contract:** Contract
- **Skills:** Java (Programming Language), Artificial Intelligence, Software System Penetration Testing, Application Performance Management, Software Bug Management, C++ (Programming Language), Cyber Security, Software Debugging, Python (Programming Language), Information Technology Security Auditing, Software Engineering, TypeScript, Rust (Programming Language), Cyber Threat Analysis, Backend, Data Analytics, Codebase, Code Restructuring, Vulnerability Analysis, Golang
- **Published:** September 27, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

1. Expertise in one or more languages: Python3, Java, Rust, Go, C++, or TypeScript.
 2. Proven experience in debugging, bug fixing, and backend development for complex systems.
 3. Strong background in cybersecurity practices, including pentesting, security audit, and vulnerability assessment.
 4. Proficiency in algorithms, codebase refactoring, and optimizing software for performance and security.
 5. Ability to communicate complex technical findings clearly and concisely.
 6. Familiarity with secure software development lifecycles and modern threat landscapes.
 7. Experience contributing to AI-related or data-driven projects is a plus, but not required.

## Description

the company is selecting Cyber Security Engineers to contribute technical expertise to a dynamic customer project. In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required your domain knowledge is what matters.
What we're looking for:

 1. Analyze, debug, and resolve software bugs and vulnerabilities across diverse codebases.
 2. Implement new features and enhance existing functionality in projects using Python3, Java, Rust, Go, C++, or TypeScript.
 3. Refactor legacy code to improve maintainability, security, and performance.
 4. Perform codebase audits, penetration testing, and other security assessments to identify and mitigate risks.
 5. Contribute to backend development and optimize application performance for scalability and security.
 6. Document findings, suggest improvements, and provide real-world insights to improve AI training datasets.


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- [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock)
- [Getting to Know Your Legacy (System) with AI-Driven Software Archeology](https://www.wearedevelopers.com/videos/1437-getting-to-know-your-legacy-system-with-ai-driven-software-archeology)
- [Security Blindspots and How to Learn About Them - Anna Oliveira](https://www.wearedevelopers.com/videos/1754-security-blindspots-and-how-to-learn-about-them-anna-oliveira)
- [Scoring 2000 Products per Request: Performance Pitfalls in Golang](https://www.wearedevelopers.com/videos/2073-scoring-2000-products-per-request-performance-pitfalls-in-golang)

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