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César SánchezCS

César Sánchez

Data Scientist Predictive Maintenance Industry

€240/day
Madrid, ES
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About César

I am an engineer with experience in sectors such as aeronautics (design and maintenance) and railway (maintenance), currently focused on Data Science and data analysis. I combine a solid technical foundation with analytical skills to transform data into useful business decisions.

I work with tools like Python, SQL, and data analysis libraries, as well as supervised and unsupervised Machine Learning techniques to develop predictive models and extract relevant patterns.

I adapt quickly to each project, prioritizing problem understanding and constant communication with the client. I develop clear, efficient, and results-oriented solutions.

My goal is to provide real value: optimize processes, improve decision-making, and generate impact from the first moment. I seek collaborations where quality, efficiency, and trust are key.
  • Spanish

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • SII GROUP- AIRBUS
    Design Engineer
    AVIATION AND AEROSPACE
    February 2026 - Today (4 months)
    Madrid, Spain
    Electrical design on the A330MRTT program, participating in the documentation of electrical installations.
    Aeronautical Design
  • ALTEN-AIRBUS
    Design Engineer
    AVIATION AND AEROSPACE
    May 2022 - December 2024 (2 years and 7 months)
    Madrid, Spain
    Structures Engineer – Pylon A380 Demonstrator (Airbus France, Toulouse / Remote from Madrid) I participated in the design and development of the primary and secondary structure of the Pylon within the A380 demonstrator program, initially at Airbus facilities in Toulouse (France) during the first months of the project, and later remotely from Madrid. The work included defining structural concepts, 3D modeling, and feasibility analysis to ensure integrity and safety. One of the main technical challenges was the selection and application of suitable materials based on operating conditions: Titanium, used in critical areas subjected to high temperatures and loads, ensuring mechanical resistance and thermal stability. Aluminum alloys, applied in secondary areas where an optimal balance between weight and rigidity was required. Likewise, I collaborated closely with multidisciplinary teams (aero-structures, materials, systems, and manufacturing) to optimize the design. Key competencies developed: Structural design in large-scale aeronautical programs. Management of advanced materials (titanium, aluminum, aeronautical alloys). International experience at Airbus France (Toulouse) and remote work from Madrid.
  • ALSTOM
    Fleet Monitoring and Maintenance Engineer
    May 2021 - April 2022 (11 months)
    Madrid, Spain
    Monitoring and maintenance of Alstom's TGV 2N2 trains (Ouigo). Maintenance of different rolling stock and onboard systems. High responsibility ensuring departures from Madrid-Barcelona.

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Education

  • Data Science & AI Bootcamp
    The Bridge
    Bootcamp Data Science & IA
  • Master's in design technologies for
    PLM & Engineering Professional Study Center
    Master's in design technologies for Automotive and Competition Vehicles

Certifications

Skill set

Categories