Internship in LLM-Assisted Network Protocol Fuzzing

Applications are invited to apply for an internship at the IMDEA Software Institute, Madrid, Spain under the supervision of Dr. Juan Caballero. The internship will explore novel AI-assisted solutions for software security, in particular for the detection of software bugs in network protocols. The following are possible research areas for the internship: * Fuzzing * LLM-Assisted Protocol Analysis * Network protocol fingerprinting * Combinations of the above The internship results could be part of an academic publication and/or form the basis of a Master’s thesis. Candidates that excel may be offered a PhD position. ### **Who should apply?** Candidates should have **completed a B.Sc. degree** in computer science or a related discipline. Being in the process of obtaining a MSc degree in those areas is a positive. Candidates should have an interest in the above topics (e.g., fuzzing, LLMs, network protocols), and a strong commitment to research. Strong, demonstrable programming and tool-building skills using Python is required. Previous research on the above topics will also be considered in the evaluation. Good command of English both spoken and written is required. ### **Working at IMDEA Software** Ranked among Europe’s leading research institutes in Computer Security, IMDEA Software offers: * A collaborative, international environment in Madrid’s Montegancedo Science \& Technology Park. * Competitive salary, excellent public healthcare, unemployment and retirement benefits. * Travel support for presenting research results. * English as the working language (no Spanish required). The position is based in Madrid, Spain, where the IMDEA Software Institute is situated. Fully remote work is not possible. ### **Dates** The ideal duration of the position is 3 to 6 months. The tentative starting period is June 1, 2026, with flexibility. ### **How to apply?** Applicants interested in the position should submit their application at https://careers.software.imdea.org/ using the **Intern** option and reference code **2026-04-intern-netfuzz**. Review of applications will begin immediately and close when the position is filled or on **April 24th, 2026**. The recruitment process will comply with the IMDEA Software Institute’s OTM-R Policy (Open, Transparent and Merit-based Recruitment). For inquiries about the position, please contact: