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Sergio ColadoSC

Sergio Colado

Freelance Software Engineer (Frontend)

€500/day
Valencia, ES
8-15 years
Typescript
React.js
React Native
JavaScript
HTML5

Average response time: 1 hour

About Sergio

  • Spanish

    Native or bilingual

  • English

    Fluent

  • German

    Conversational

  • Catalan

    Fluent

Can work on-site
Valencia (up to 50km)

Experience

  • Deutsche Kreditbank
    Freelance Senior Software Developer
    DIGITAL AND IT
    March 2022 - December 2024 (2 years and 9 months)
    Berlin, Germany
    • Delivered new features for a financial web application within a cross-functional, cross-departmental environment, aligning technical solutions with business objectives.
    • Contributed to frontend architecture through UI implementation, code reviews, debugging and maintenance of test suites and shared libraries.
    • Prototyped and validated solutions to complex frontend challenges, and communicated trade-offs and approaches across teams to drive alignment and execution.
    • Toolstack: TypeScript, React, Redux, Jest, PlayWright, RTL, D3, Docker, Figma.
  • Actio
    Freelance Senior Software Developer
    DIGITAL AND IT
    November 2021 - January 2022 (2 months)
    • Led the design and implementation of new features for a social knowledge-sharing app.
    • Drove codebase improvements through refactoring and UI implementations.
    • Toolstack: TypeScript, React Native, Redux, Jest, Figma.
  • FLIXBUS
    Freelance Software Developer
    April 2021 - October 2021 (6 months)
    Berlin, Germany
    • Delivered new features for a cross-platform mobile application, including leading the migration of core business logic from a native codebase to a modern React Native stack.
    • Led the development of an MVP for a new web application, working closely with designers and backend engineers to translate requirements into a scalable, production-ready solution.
    • Toolstack: TypeScript, JavaScript, React Native, Redux, Kotlin, MobX, Figma.
Check out Sergio's experience

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Education

  • BA
    University of Valencia
    2011
    BA

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