Description

I'm a software engineer specialised in cryptography and secure systems, with hands-on experience in Fully Homomorphic Encryption (FHE), post-quantum cryptography and secure backend development across R&D and defense environments.

I help companies review and improve their cryptographic implementations, integrate encryption mechanisms into real systems, and produce clear security documentation for technical and non-technical audiences.

If your team is handling sensitive data, preparing for a security audit, or integrating advanced cryptographic techniques and needs a specialist who can deliver practical, production-ready guidance — I can help.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

Telefonica
Software Engineer
TELECOMMUNICATIONS
July 2025 - Today (1 year)
Madrid, Spain
Developed secure backend systems and REST APIs across C++, Kotlin and C# within a 7-person defense R&D team, building and Dockerizing full-stack applications end-to-end. Designed a GitLab CI/CD security pipeline with SAST, SBOM generation and automated CVE scanning — catching 3 critical vulnerabilities before production. Built a binary publish registry reducing compilation time from 15 minutes to seconds, saving the team ~2 hours daily. Acted as technical bridge between the cryptography specialist and the rest of the team.
Kotlin C++ Google Protocol Buffers Java Native Interface CI/CD
Secure Identity Technologies S.L.
Software Engineer
July 2023 - July 2025 (2 years)
Madrid, Spain
Built IoT cybersecurity backend applications and APIs in a startup environment, developing and Dockerizing full-stack systems from backend to frontend following Agile methodologies. Implemented Fully Homomorphic Encryption for privacy-preserving data processing — enabling computation directly on encrypted data without exposing plaintext, supporting GDPR/LGPD compliance. Developed post- quantum key exchange mechanisms and contributed to client-facing technical documentation and presentations.
FHE Fully Homomorphic Encryption Cybersecurity Post-quantum cryptography C#
IDBOTIC
Software Engineer Internship
November 2022 - July 2023 (8 months)
Developed applications using FHE and post-quantum cryptography (e.g., Kyber), gaining hands-on experience in secure software development within software-hardware integrated environments.