Antonija Šimić

@antonijasimic

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Senior React Developer with a passion for clean code and mentoring.

Croatia

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What I'm looking for

I am looking for a role that values collaboration and offers opportunities for growth while allowing me to leverage my skills in React development.

As a Senior React Developer with over 10 years of experience, I have a proven track record of building modern web and mobile applications. My journey has taken me through various roles, where I have honed my skills in developing performant UIs and mentoring junior developers. I am passionate about clean code and believe in the importance of collaboration in remote teams.

In my recent role at FunderPro, I successfully developed new features like an affiliate system and enhanced user sign-up flows. My efforts in reducing API call redundancy by 40% using React Query have significantly improved application performance. Previously, at Casumo, I improved the authentication flow with Keycloak, adding more security for users and migrating key modules from legacy systems to React, which decreased page load time by 35%.

Throughout my career, I have demonstrated strong leadership skills and a commitment to optimizing user experiences. I thrive in environments where I can contribute to both the technical and mentoring aspects of development, ensuring that my team and I deliver high-quality products.

Experience

Work history, roles, and key accomplishments

Current

Senior React Developer

Current

FunderPro

Jan 2023 - Present (2 years 6 months)

Developed new features such as an affiliate system, coupon creation, KYC flow, and an enhanced user sign-up flow. Reduced API call redundancy by 40% using React Query.

React React Query UI Development API Integration Mentoring

Senior React Developer

Casumo

Jan 2022 - Jan 2023 (1 year)

Improved authentication flow with Keycloak, enhancing user security. Migrated key modules from legacy WordPress/KnockoutJS to React, decreasing page load time by 35%.

React Keycloak WordPress KnockoutJS Performance Optimization

Mid Angular Developer

Formunauts

Jan 2021 - Jan 2022 (1 year)

Architected a scalable and reliable communication layer between an Angular-based frontend and the Raisenow API. This improved data exchange efficiency and system stability.

Angular Communication Layer Frontend Development

Mid React Developer

AsyncLabs Software Development & Digital Agency

Jan 2020 - Jan 2021 (1 year)

Optimized API flows using Axios Interceptors, improving perceived speed by 20%. This enhancement significantly boosted user experience and application responsiveness.

React Frontend Development Performance Tuning

Senior Javascript Developer

Code Institute Global

Jan 2017 - Jan 2020 (3 years)

Refactored the entire CSS architecture, improving speed load and user experience. Built and maintained features used by 10,000 students on a Django-based LMS.

JavaScript Django LMS

Mid UI Developer

TINT Community Powered Marketing Platform

Jan 2015 - Jan 2017 (2 years)

Translated Figma designs into pixel-perfect, responsive layouts using semantic HTML and modular SCSS. Ensured cross-browser compatibility and optimal user interface.

Figma HTML SCSS Responsive Design UI Development

Education

Degrees, certifications, and relevant coursework

Unknown

Unknown, Unknown

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