Diego Fernández Criado

Kotlin Multiplatform Developer

Toledo, Spain, CET

“The 1% improvements are what make the difference”

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diegofercri.dev/[email protected]
Diego Fernández Criado
esen

About

I'm passionate about UI and UX design. I'm enthusiastic about photography, cinema, and music, and I'm a gaming geek. My passion for technology, innovation, and perfection have brought me here.

Work Experience

Telefónica

09 ⁠/⁠ ⁠2025 ⁠-⁠ ⁠Present

Kotlin Multiplatform Developer

Development of desktop applications for Windows and Linux using Kotlin Multiplatform and the JVM, working across different layers of the product and taking on responsibilities in both implementation and technical design.
  • UI/UX development, business logic, and reusable components with Compose Multiplatform
  • Implementation of Unix sockets for communication between different instances of the app
  • Participation in architecture decisions, code reviews, and PRs
  • Cross-functional participation, collaborating with design, QA, backend, and product
  • Kotlin Multiplatform
  • Compose Multiplatform
  • Gitlab
  • Scrum

M2M Aplicaciones

03 ⁠/⁠ ⁠2025 ⁠-⁠ ⁠09 ⁠/⁠ ⁠2025

Cybersecurity Solutions Developer and Implementer

Interpretation and implementation of the National Security Framework (ENS), ensuring the regulatory compliance required for the company to keep providing services to businesses and public administrations.
  • Analysis and interpretation of ENS requirements for their implementation within the company
  • Deployment and configuration of firewalls and network segmentation to strengthen perimeter security
  • Design and implementation of backup and business continuity policies
  • Hardening and administration of Linux/Windows systems and servers
  • National Security Framework (ENS)
  • C#
  • Linux
  • Proxmox

Education

IES Azarquiel

09 ⁠/⁠ ⁠2023 ⁠-⁠ ⁠06 ⁠/⁠ ⁠2025
Multiplatform App Development

IES Azarquiel

09 ⁠/⁠ ⁠2021 ⁠-⁠ ⁠06 ⁠/⁠ ⁠2023
Microcomputer Systems and Networks

Skills

  • Git
  • GitHub
  • GitLab
  • Cloudflare
  • Proxmox
  • Docker Compose
  • Supabase
  • SQL
  • Java
  • Kotlin
  • Jetpack Compose
  • Figma
  • Design Systems
  • Scrum
  • OpenCode
  • AI/LLMs
  • BitWarden

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