Antonija S.

Antonija S.

Senior React Developer

Zagreb, Croatia
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About Me

Antonija is a Senior React Developer with UI and front-end experience building reliable and scalable solutions using modern libraries and technologies to deliver high-quality solutions to complex business problems. She develops custom reusable components, translates designs and wireframes into resilient code, and optimizes front-end architecture for maximum performance across different platforms.

Work history

UpStack
UpStack
Senior React Developer
2022 - Present (2 years)
Remote
  • Creating and developing innovative software solutions for clients across a broad range of industries.

  • Participating in scrums consisting of cross-functional teams, both software and hardware.

  • Ensuring that features are being delivered efficiently and on time.

MochaLabs
MochaLabs
Senior React Developer
2023 - Present (1 year)
Zagreb (Hybrid), Croatia
  • Implementing dynamic and responsive UIs using React and developing modular and reusable UI components to ensure consistency and scalability across the platform.

  • Using TypeScript to bring type safety and enhanced tooling to the development process to prevent potential errors early in the development lifecycle.

  • Integrating React Query into the FunderPro platform to facilitate efficient data fetching and state management, optimizing network requests, and minimizing unnecessary data fetching, resulting in improved performance and responsiveness across the platform.

React.jsTypescriptReact-QueryComponent-based Architecture UI ComponentsResponsive UI
Casumo
Casumo
Senior React Developer
2022 - 2023 (1 year)
Remote
  • Transitioned the existing codebase from Knockout.js to React to harness the power of React's component-based architecture.

  • Implemented Keycloak, to fortify the platform's security infrastructure, enabling secure user authentication and authorization mechanisms.

  • Integrated dynamic content such as Contentful and WordPress CMS, seamlessly integrating their outputs into the web page.

  • Played a pivotal role in deploying code changes using Jenkins CI/CD pipeline, reducing time between code changes and their availability on the live platform.

React.jsREST APIs TypescriptKeycloakCloudFlareKnockout (Knockout.js) ContentfulWordPressCMSJenkinsCI/CD CI/CD Pipelines Component-based Architecture
Human
Human
React.js Developer
2021 - 2022 (1 year)
Zagreb, Croatia
  • Contributed to the development of pixel-perfect layouts on solutions for Human.

  • Designed and developed the latest user-facing features on solutions using React.js, Stencil, and Storybook.

  • Translated custom Figma designs into high-quality front-end solutions.

Kodiraonica
Kodiraonica
Founder | Technical Lead
2021 - Present (3 years)
Zagreb, Croatia
  • Managing and supervising end-to-end JavaScript and React.js initiatives for the coding school.

  • Owning and improving the technical maturity (reliability, scalability, resilience, and quality) of systems.

  • Designing and building the tooling required to ease the development and maintenance of internal games and apps.

Oslo Philanthropic Exchange
Oslo Philanthropic Exchange
Full-stack Developer
2021 - 2021
Remote
  • Designed and developed a new CSS architecture to enhance the experience on the OPX exchange.

  • Created and added new UIs and features to the platform.

  • Wrote and deployed unit tests for solutions on the project.

Formunauts
Formunauts
Angular Developer
2020 - 2020
Remote
  • Designed and integrated a new solution to communicate between the app and the RaiseNow API.

  • Provided solutions for the API architecture and implemented the services, Axios calls, and observables.

  • Integrated the API with the mPOS to process payments with credit cards.

Async Labs
Async Labs
React.js Developer
2019 - 2019
Remote
  • Worked on implementing a domain-driven design architecture on the Revuto crypto platform.

  • Designed and implemented new data visualization graphs on the PIMSF workflow management system.

  • Utilized the React-grid-layout package to deliver clean and fluid layouts on the solution for PIMSF.

Punk Rock Dev
Punk Rock Dev
Front-end Developer
2017 - 2019 (2 years)
Remote
  • Designed new responsive layouts and implemented UIs for user authentication and authorization on the app.

  • Developed and implemented solutions to integrate the UI to the back-end API using Axios.

  • Produced reusable and scalable components for future updates on the solution.

Code Institute
Code Institute
Front-end Developer
2016 - 2018 (2 years)
Remote
  • Designed and implemented fresh, modern components onto an existing LMS platform.

  • Optimized the legacy codebase with clean, scalable code and improved SCSS logic to maximize performance on the LMS.

  • Liaised with the designer to deliver contemporary design on the platform, translating designs into intuitive interfaces.

Freelance
Freelance
Front-end Developer
2015 - 2018 (3 years)
Remote
  • Designed and built static, pixel-perfect, and mobile-friendly websites for clients.

  • Optimized codebases and implemented cross-browser and cross-device compatibility on solutions.

  • Developed and deployed solutions to customize animations and third-party libraries.

Portfolio

React.js Developer - Revuto
React.js Developer - Revuto

Revuto is a fintech app that offers users recurring payment blocking services. It comes with a prepaid debit card, subscription payment management, peer-to-peer payments, and cryptocurrency buying, sending, and exchange. Designed and developed solutions using React.js, Axios, and other tools and implemented a new authentication and authorization system and UI using CSS.

Full-stack Developer - Oslo Philanthropic Exchange
Full-stack Developer - Oslo Philanthropic Exchange

Oslo Philanthropic Exchange is a nonprofit foundation using global capital market best practices to raise philanthropic funding for different projects. Designed and developed scalable and maintainable CSS architecture to enhance designs within an Angular environment.

Front-end Developer - Span
Front-end Developer - Span

Designed and implemented new front-end solutions on the website for Span, a European-based IT consultancy and services firm. Developed high-quality and intuitive front-end components such as forms, navigation, footer, and slide using Storybook.

Education

Master's Degree, Comparative Literature
Master's Degree, Comparative Literature
University of Zagreb - Croatia
2014 - 2016 (2 years)
Bachelor's Degree, Croatian Language and Literature
Bachelor's Degree, Croatian Language and Literature
University of Zagreb - Croatia
2009 - 2014 (5 years)