Šime Buljac, Full-stack Developer in Split, Croatia
Šime Buljac

Full-stack Developer in Split, Croatia

Member since November 24, 2015
Šime is a full-stack developer with over nine years of experience. He is a passionate programmer who loves to try the latest bleeding-edge technologies. He is very flexible and is equally comfortable working solo or in a team.
Šime is now available for hire

Portfolio

  • BBC Scotland(via Blockincrement)
    TypeScript, JavaScript, Amazon Web Services (AWS), AWS Lambda...
  • Iotexpad
    Solidity, TypeScript, Amazon Web Services (AWS), Blockchain, Ethereum...
  • Paragen
    Solidity, TypeScript, Blockchain, Ethereum, Blockchain & Cryptocurrency...

Experience

Location

Split, Croatia

Availability

Part-time

Preferred Environment

Git, Vim Text Editor, Visual Studio Code, VS Code, MacOS, Linux

The most amazing...

...thing I've developed is an application for filtering, storing, and distributing real-time position data.

Employment

  • Back-end Developer

    2022 - 2022
    BBC Scotland(via Blockincrement)
    • Developed logic for AWS lambdas that sync data fetched from external APIs to in-house database in previously specified time periods.
    • Researched the best approach for implementing solutions via serverless architecture.
    • Built and updated serverless framework configuration and deployment files for seamless continuous integration and delivery.
    Technologies: TypeScript, JavaScript, Amazon Web Services (AWS), AWS Lambda, Serverless Framework, Serverless Architecture, Serverless, Node.js, AWS CLI
  • Smart Contract and Back-end Developer

    2021 - 2022
    Iotexpad
    • Worked on developing, testing, and deploying various smart contracts required for the dApp.
    • Oversaw initial launchpads and wrote automatization scripts.
    • Built a back-end API server from AWS as an optimization/caching layer for the dApp.
    Technologies: Solidity, TypeScript, Amazon Web Services (AWS), Blockchain, Ethereum, Blockchain & Cryptocurrency, Ethereum Smart Contracts, Smart Contracts, Next.js, JavaScript, MetaMask, Ethers.js
  • Smart Contract and Back-end Developer

    2021 - 2022
    Paragen
    • Developed and deployed staking and launchpad smart contracts.
    • Deployed the claiming portal and vesting smart contract.
    • Wrote the automatization script, including snapshotting and deploying.
    Technologies: Solidity, TypeScript, Blockchain, Ethereum, Blockchain & Cryptocurrency, Ethereum Smart Contracts, Smart Contracts, Next.js, JavaScript, MetaMask, Ethers.js
  • Full-stack Developer

    2018 - 2021
    Honu Hr/Sora (via Toptal)
    • Set up and refactored a large part of the project for an incoming MVP release.
    • Set up staging and production infrastructure on AWS.
    • Worked on continuous integration and deployment process.
    Technologies: Amazon Web Services (AWS), Terraform, PostgreSQL, Redis, React, GraphQL, Express.js, Node.js, SQL, JavaScript
  • Smart Contract and Back-end Developer

    2020 - 2020
    Greenpower
    • Developed a system that allows users token migration from GreenPower (fork of Bitshare) blockchain to Ethereum by monitoring token burn process on one chain and then minting new tokens on Ethereum.
    • Worked on deploying ERC20 smart contract and contract for batch distribution of ERC20 tokens.
    • Set up everything required on AWS for smooth/secure migration.
    Technologies: Solidity, Blockchain, Ethereum, Blockchain & Cryptocurrency, JavaScript, MetaMask
  • Back-end/DevOps Engineer

    2016 - 2018
    Roomi
    • Integrated various third-party services (SendGrid, Evident, Sift Science, Twilio, Facebook, Google Maps, etc.).
    • Integrated security monitoring, performance monitoring, and logging services/tools.
    • Diagnosed and optimized part of the app with performance issues to prepare it for a global scale.
    Technologies: Amazon Web Services (AWS), React, AngularJS, REST APIs, RESTful Development, Cloudflare, Docker, Ansible, Terraform, Redshift, Redis, Elasticsearch, MongoDB, Express.js, Node.js, SQL, JavaScript
  • Full-stack Developer

    2016 - 2017
    Rhinogram (via Toptal)
    • Worked on the development of a HIPAA-compliant telehealth platform that enables a better patient experience by making remote healthcare possible, simplifying communication and minimizing interruptions with real-time, text-based patient engagement.
    Technologies: Amazon Web Services (AWS), Heroku, React, Angular, MySQL, CouchDB, Node.js, SQL, JavaScript
  • Web Developer

    2012 - 2015
    MORH
    • Helped design and develop new features.
    • Wrote unit and E2E tests.
    • Developed a responsive AngularJS application.
    • Wrote scripts for the automation of system maintenance tasks.
    • Made several performance optimizations to existing code.
    Technologies: Socket.IO, Mongoose, MongoDB, Angular Material, Bootstrap, CSS, HTML, JavaScript, AngularJS, Express.js, Node.js
  • Software Developer

    2009 - 2012
    MORH
    • Improved old features and created new ones.
    • Fixed bugs on the existing code.
    • Wrote technical documentation.
    • Handled system and network administration.
    • Mentored new team members.
    Technologies: CSS, jQuery, HTML, JavaScript, PostgreSQL, Hibernate, Java

Experience

  • Sora
    https://app.sora.co

    Onboarding for growing teams.

  • Roomiapp
    https://roomiapp.com/

    A mobile platform that helps people find a flexible, affordable co-living solution.

  • Rhinogram
    https://app.rhinogram.com/login

    Rhinogram’s HIPAA-compliant, telehealth platform enables a better patient experience by making remote healthcare possible, simplifying communication and minimizing interruptions with real-time, text-based patient engagement–with no patient app to download.

  • Live Air Picture Distribution

    Web application for distribution of a joint air picture, used by different units across the whole organization.

    The application was wholly built on MEAN stack. I was included in all project development phases from the initial application architecture design and managing the development team to the implementation itself.

  • Near Real-time Tracking System

    Originator and participant in almost all project development phases of the project for position tracking. The system ensures that data is collected from different sources (GPS, radar, open source) establishing a unique database (PostgreSQL, Hibernate ORM). The system is designed using client-server architecture, with the possibility for the client to manipulate tracked data and with an automatic correlation system that ensures unique identification of data tracked from different sources.

  • Remote Radio Control System

    An application for centralized remote control and administration of multiple radio transceivers (also enabled transceiver to communicate mutually). As a part of the small team, I was included in all parts of development and testing.

Skills

  • Languages

    ECMAScript (ES6), JavaScript, Solidity, GraphQL, HTML, CSS, SQL, HTML5, Java, TypeScript
  • Frameworks

    Express.js, AngularJS, Hibernate, Angular Material, Angular, Next.js, Serverless Framework
  • Libraries/APIs

    REST APIs, Node.js, Lodash, React, Socket.IO, jQuery
  • Paradigms

    RESTful Development, Object-oriented Programming (OOP), Unit Testing, Functional Programming, DevOps, Serverless Architecture
  • Storage

    MongoDB, Redis, Elasticsearch, PostgreSQL, MySQL, Redis Cache, Amazon S3 (AWS S3), CouchDB, Redshift
  • Tools

    IntelliJ IDEA, Vim Text Editor, React Apollo, VS Code, Git, Mongoose, Ansible, Terraform, MetaMask, AWS CLI
  • Platforms

    Blockchain, Ethereum, Linux, MacOS, Heroku, Docker, Amazon Web Services (AWS), AWS Elastic Beanstalk, AWS Lambda, Visual Studio Code
  • Other

    Apollo, Apollo Server, Blockchain & Cryptocurrency, Cloudflare, Amazon Route 53, Ethereum Smart Contracts, Smart Contracts, Ethers.js, Serverless, Code Deployment, Codebase Development, AWS Certified Developer

Education

  • Master's Degree in Computing (Software Engineering)
    2003 - 2009
    Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture (FESB) - Split

Certifications

  • AWS Certified Developer — Associate
    OCTOBER 2022 - OCTOBER 2025
    Amazon Web Services Training and Certification
  • Toptal Blockchain Academy
    JUNE 2018 - PRESENT
    Toptal Academy

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