Luka is available for hire

Luka Brkanic

Verified Expert in Engineering

Software Developer

Zagreb, Croatia

Toptal member since November 18, 2020

Expertise

Front-end Full-stack Back-end Developers CSS Visual Studio Development JavaScript MongoDB Express.js REST API MEAN Stack JSON HTML5 Node.js Hyperledger Crytographer

Bio

Luka is a full-stack web developer with nine years of experience. He has developed different applications in various industries, such as fintech, eCommerce, smart traffic, and broadcasting. He delivers complete test-covered robust solutions and prefers Node.js and Angular-based technology stacks. Luka is also experienced with Java, AngularJS, and embedded digital signal processing systems.

Portfolio

AB-InBev

Node.js, Fintech, MongoDB, PostgreSQL, Jest, Koa, JavaScript, Twilio, Azure...

Taurus Group SA (via Toptal)

Angular, Blockchain, TypeScript, Ant Design, Flexbox, Git, CSS3...

Asseco SEE

RxJS, TypeScript, Angular Material, JavaScript, Keycloak, Angular, Flexbox...

Experience

JavaScript - 7 years
Linux - 7 years
Express.js - 7 years
MongoDB - 7 years
Node.js - 5 years
Angular - 5 years
RxJS - 3 years
TypeScript - 2 years

Availability

Part-time

Preferred Environment

Linux, Node.js, Angular, Visual Studio Code (VS Code), Linux Mint

The most amazing...

...app I've built from scratch is an admin and help desk interface for the access control server (ACS) that was a part of the 3D Secure solution for Asseco.

Work Experience

Node.js Back-end Developer

2021 - 2022

AB-InBev

Developed a lending platform for small businesses in Colombia, Dominican Republic, Mexico, and Peru.
Created a messaging service to send customers notifications, mainly SMS using Twilio.
Implemented various aspects of the existing application, like performance, observability, and unit and integration test coverage.

Technologies: Node.js, Fintech, MongoDB, PostgreSQL, Jest, Koa, JavaScript, Twilio, Azure, REST APIs, JSON, APIs, REST, Back-end, Databases, Git, Redis Cache, ECMAScript (ES6), API Integration

Angular Developer

2021 - 2021

Taurus Group SA (via Toptal)

Developed Taurus Trade, trading application specialized in crypto assets.
Implemented authentication and authorization features, various new screens, and dialogs on the front-office application.
Designed and implemented pages for administrating orders, trading pairs in a separate back-office application.
Improved the existing features on both front-office and back-office web applications.

Technologies: Angular, Blockchain, TypeScript, Ant Design, Flexbox, Git, CSS3, ECMAScript (ES6), Front-end, Dashboards, Taurus

Front-end Web Developer

2018 - 2019

Asseco SEE

Worked in the authentication department on the TriDES2 product, a 3D Secure solution certified under the EMV 3D Secure protocol.
Developed the ACS admin application for TriDES2 from scratch using Angular and TypeScript.
Implemented the advanced authentication and authorization settings for different roles using Keycloak.
Supported the integration and managed containerized servers using Docker and NGINX.

Technologies: RxJS, TypeScript, Angular Material, JavaScript, Keycloak, Angular, Flexbox, JSON, APIs, REST, Git, CSS3, Front-end, API Integration, Dashboards

Software Developer

2015 - 2018

RIZ-Transmitters, Co.

Developed and maintained the transmitter control system and its graphical user interface (TCS GUI) used by RIZ's shortwave and middlewave transmitters (FIDELITY line).
Implemented the TCS web interface, a new generation of TCS GUI used to configure and control a radio transmitter's operations.
Developed the exciter embedded software for the generation and processing of the RF signal.
Built various tools and applications used to automate factory testing and project management.

Technologies: Qt, C++, C, Embedded Systems, DSP, TI-RTOS, Node.js, AngularJS, JavaScript, Flexbox, Linux Mint, WebSockets, Git, CSS3, Front-end, CSV, Electron, Radio, Digital Radio, Dashboards

Java Developer

2013 - 2015

Telegra

Developed and maintained the reporting module for the topXview, Telegra's traffic monitoring, control, and management system.
Built and maintained the reporting module for the Tollway, Telegra's tolling solution.
Supported the integration department with more than 20 deployments worldwide.

Technologies: jQuery, JavaScript, Apache Struts 2, Spring, JasperReports, Java, SQL, Back-end, Databases

Experience

ACS Admin App for the 3D Secure Solution Version 2+

https://cybersecurity.asee.co/online-payments/

An administrator and helpdesk interface for the access control server that I developed from scratch. The application was a part of the TriDES2 product, an Asseco 3D Secure solution for issuing and acquiring institutions wanting to reduce the risk of fraudulent online payment transactions with strong customer authentication.

eCommerce Application for Meriwether

https://www.meriwether-official.com/

A completely customized eCommerce application built with the JavaScript and TypeScript stack (Angular and Node.js) and Stripe payment gateway. The app is used by an independent raincoat designer. I took full responsibility for developing and deploying the complete project lifecycle. The solution includes a public store and admin dashboard for managing orders, products, discounts, journals, and newsletters. I also implemented SEO best practices and helped marketing efforts to increase sales.

TCS Web Interface

A transmitter control system web interface that I implemented from scratch. The interface is designed for configuring, controlling, and tracking various measurements remotely. It was designed to work with RIZ's FIDELITY line of medium and shortwave radio transmitters.

Education

2009 - 2011

Master's Degree in Information and Communication Technology

University of Zagreb, Faculty of Electrical Engineering and Computing - Zagreb, Croatia

2005 - 2009

Bachelor's Degree in Computing

University of Zagreb, Faculty of Electrical Engineering and Computing - Zagreb, Croatia

MongoDB University | via edX

OCTOBER 2015 - PRESENT

Introduction to Linux (LFS101x)

The Linux Foundation | via edX

NOVEMBER 2013 - PRESENT

Cryptography I

Stanford University | via Coursera

Skills

Libraries/APIs

Node.js, RxJS, REST APIs, Flexbox, Stripe, HTML5 Canvas, Stripe API, JasperReports, jQuery

Tools

Mongoose, Keycloak, Git, Google Analytics, Jenkins

Languages

CSS, HTML5, JavaScript, TypeScript, HTML, TypeScript 2, SCSS, C, CSS3, ECMAScript (ES6), SQL, GraphQL, Java, C++, PHP

Frameworks

Express.js, Angular, Angular Material, AngularJS, Koa, Jest, Spring, Apache Struts 2, Qt, Ant Design, Ionic, Electron, Taurus

Paradigms

MEAN Stack, REST, DevOps, Search Engine Optimization (SEO)

Platforms

Visual Studio Code (VS Code), Linux Mint, Linux, Twilio, Ubuntu, DigitalOcean, Blockchain, Hyperledger, Docker, Kubernetes, OpenShift, TI-RTOS, Azure

Storage

MongoDB, JSON, Databases, PostgreSQL, Redis Cache

Other

Full-stack, APIs, Back-end, Front-end, API Integration, Full-stack Development, CSV, Dashboards, Stripe Payments, Mathematics, Physics, Electronics, Embedded Systems, Digital Signal Processing, Software Engineering, Neural Networks, Image Processing, Cryptography, Algorithms, Containers, RHEL, Data Structures, DSP, WebSockets, Fintech, Microeconomics, Entrepreneurship, CI/CD Pipelines, Psychology, eCommerce, Digital Marketing, Google, Search Engine Marketing (SEM), Radio, Digital Radio

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