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Hi, I’m Francesca Antelo Callau, a Frontend & Mobile Engineer with 3+ years of experience building cross-platform applications from scratch through to production. I’ve worked as both Tech Lead and Lead Developer, using Flutter, React, and React Native to deliver real-world products.\n\nMy focus has been on architecture, reusable components, API integration, and creating solid user experiences. I enjoy working on products where clean code and product quality really matter, and where solutions are built to scale.…Hi, I’m Francesca Antelo Callau, a Frontend & Mobile Engineer with 3+ years of experience building cross-platform applications from scratch through to production. I’ve worked as both Tech Lead and Lead Developer, using Flutter, React, and React Native to deliver real-world products.\n\nMy focus has been on architecture, reusable components, API integration, and creating solid user experiences. I enjoy working on products where clean code and product quality really matter, and where solutions are built to scale.

Francesca Antelo Callau

Front-End Developer, Back-End Developer, Full Stack Developer, +5

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Hi, I’m Francesca Antelo Callau, a Frontend & Mobile Engineer with 3+ years of experience building cross-platform applications from scratch through to production. I’ve worked as both Tech Lead and Lead Developer, using Flutter, React, and React Native to deliver real-world products.\n\nMy focus has been on architecture, reusable components, API integration, and creating solid user experiences. I enjoy working on products where clean code and product quality really matter, and where solutions are built to scale.…Hi, I’m Francesca Antelo Callau, a Frontend & Mobile Engineer with 3+ years of experience building cross-platform applications from scratch through to production. I’ve worked as both Tech Lead and Lead Developer, using Flutter, React, and React Native to deliver real-world products.\n\nMy focus has been on architecture, reusable components, API integration, and creating solid user experiences. I enjoy working on products where clean code and product quality really matter, and where solutions are built to scale.

Available to hire

Hi, I’m Francesca Antelo Callau, a Frontend & Mobile Engineer with 3+ years of experience building cross-platform applications from scratch through to production. I’ve worked as both Tech Lead and Lead Developer, using Flutter, React, and React Native to deliver real-world products.\n\nMy focus has been on architecture, reusable components, API integration, and creating solid user experiences. I enjoy working on products where clean code and product quality really matter, and where solutions are built to scale.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

German

Intermediate

Work Experience

Flutter Developer at Beepay

January 1, 2022 - January 1, 2024

End-to-end development of a digital payment and ticketing application from greenfield implementation to production release. Built scalable UI components with Flutter, integrated payment flows, QR/hybrid payment support, and REST APIs.

Tech Lead & Front End Lead

January 1, 2024 - January 1, 2025

Led end-to-end front-end development of a short-term rental platform from initial concept to production deployment. Coordinated feature planning, versioning, and releases across development cycles; collaborated with back-end and product teams to translate business requirements into technical solutions.

Frontend & Mobile Engineer at Merteck ecosystem

January 1, 2025 - Present

Designing and developing scalable web and mobile applications using React, TypeScript, and React Native; building business modules (finance, treasury, expenses, settlements); developing across-platform mobile application as part of the Merteck ecosystem; designing reusable component systems across web and mobile; implementing global state management and structured data flows; integrating REST APIs and handling asynchronous data

Frontend & Mobile Engineer at Mertek

January 1, 2025 - Present

Frontend & Mobile Engineer responsible for building scalable web and mobile applications using React, TypeScript, and React Native; developed core business modules including finance, treasury, and expenses; designed reusable component systems; implemented global state management and structured data flows; integrated REST APIs and handled asynchronous data.

Tech Lead & Frontend Lead at BeeRenter

January 1, 2024 - January 1, 2025

Designed and implemented scalable UI modules with Riverpod/BLoC state management; migrated legacy codebase to a modular, maintainable architecture; coordinated feature planning, versioning, and releases across development cycles; integrated REST APIs, authentication flows, and role-based user experiences; collaborated with backend and product teams to translate business requirements into technical solutions.