Twine
Twine

Senior full-stack developer with 9+ years of building innovative solutions that enhance project outcomes and functionality. I specialize in HTML, css, javascript, React.js, Next.js, tailwind css, material-ui, bootstrap with

Aleksandar Kostic

Senior full-stack developer with 9+ years of building innovative solutions that enhance project outcomes and functionality. I specialize in HTML, css, javascript, React.js, Next.js, tailwind css, material-ui, bootstrap with frontend and secure, flexible backend. Experience: -Led the end-to-end development of a high-traffic web application serving over 1M users, optimizing frontend performance with Next.js server-side rendering (SSR) and reducing page load times by 50%. -Architected and implemented a

Available to hire

Senior full-stack developer with 9+ years of building innovative solutions that enhance project outcomes and functionality.
I specialize in HTML, css, javascript, React.js, Next.js, tailwind css, material-ui, bootstrap with frontend and secure, flexible backend.
Experience:
-Led the end-to-end development of a high-traffic web application serving over 1M users, optimizing frontend performance with Next.js server-side rendering (SSR) and reducing page load times by 50%.
-Architected and implemented a scalable microservices infrastructure, migrating from a monolithic system to containerized Node.js services on AWS ECS, which improved system reliability and reduced downtime by 40%.
-Optimized PostgreSQL database queries using indexing and partitioning techniques, improving read/write efficiency by 30% and reducing query execution time from 200ms to 50ms.

As an available full-stack developer, I can work more than 8 hours a day if needed. I will provide company with outstanding result. Thanks.

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Experience Level

CSS
Expert
HTML5
Expert
JavaScript
Expert
Laravel
Expert
Node.js
Expert
PostgreSQL
Expert
React JS
Expert
Tailwind
Expert
Bootstrap
Expert
AWS
Expert
MongoDB
Intermediate
Google API
Intermediate
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Language

English
Advanced
Serbian
Fluent

Education

Bachelor in Computer Science at Singidunum University
March 31, 2014 - March 31, 2019

Qualifications

Senior Full-sta
March 31, 2025 - March 31, 2025

Industry Experience

Software & Internet, Professional Services
    uniE613 scale in
    This project is an investment website containing two services. Quant Invest: Leverages on-chain quantitative algorithms to automate user's crypto investments. Private Club: This provides an exclusive network, shared strategies and unique opportunities. This project consists of a responsive front-end and a back-end that is thoroughly secured and is supported by blockchain technology. You can check out on https://www.twine.net/signin Thanks.

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