Djordje Vucinic, Developer in Dubai, United Arab Emirates
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Djordje Vucinic

Bio

Djordje is a software engineer focused on scalable back-end systems and full-stack product development. His experience includes distributed architectures, cloud-native applications, and high-performance web platforms. Djordje enjoys taking ownership from requirements to delivery and builds software that is efficient, secure, and maintainable.

Portfolio

Ta-da
Python, FastAPI, TypeScript, Next.js, Web3.js, Full-stack, REST APIs, APIs...
Concentrical
Python, Django, FastAPI, LangChain, Pinecone, Next.js, React, Go, Gin-Gonic...
Freelance
Python, JavaScript, TypeScript, Go, Java, Rust, SQL, Vercel, REST APIs...

Experience

  • Python - 8 years
  • PostgreSQL - 8 years
  • Visual Studio Code (VS Code) - 8 years
  • GitHub - 7 years
  • Java - 7 years
  • Docker - 7 years
  • Next.js - 6 years
  • AWS IoT - 5 years

Preferred Environment

Slack, Microsoft Teams, Visual Studio Code (VS Code), Docker, GitHub, AWS IoT, Google Cloud Platform (GCP), ClickUp, Jira, Notion

The most amazing...

...thing I've developed is a real-time platform where thousands of users interact simultaneously, complete tasks, and receive automated validation and payouts.

Work Experience

Lead Software Engineer | Contractor

2025 - PRESENT
Ta-da
  • Architected and built a full-stack task marketplace platform, enabling users to complete micro-tasks such as audio recording, image annotation, and surveys with integrated crypto and fiat payment systems.
  • Designed and deployed serverless cloud infrastructure handling user authentication, task processing, and payment workflows. Implemented monitoring, scaling, and CI/CD pipelines.
  • Developed algorithmic market-making strategies for cryptocurrency markets by implementing automated trading logic and risk management systems.
Technologies: Python, FastAPI, TypeScript, Next.js, Web3.js, Full-stack, REST APIs, APIs, Back-end, MySQL, API Architecture, MongoDB, Asynchronous Development, Artificial Intelligence (AI), ChatGPT API, Full-stack Development, Web Development, Cloud Architecture, Amazon Web Services (AWS), Agentic AI, Code Deployment, AI Integration, DevOps

Lead Software Engineer

2023 - PRESENT
Concentrical
  • Headed a team in the design, development, and testing of high-performance and scalable back-end components. Identified potential issues proactively and implemented improvements to ensure optimal system performance.
  • Initiated and led a new AI project, including the adoption of reinforcement learning with retrieval-augmented generation (RAG) and the incorporation of state-of-the-art language models like LangChain.
  • Collaborated with the front-end team to develop solutions that elevate the user experience and methodically improve company services.
  • Played a crucial role in various aspects of the IT sector, including DevOps tasks, ensuring seamless integration, deployment, and monitoring of applications and services with AWS and GCP.
Technologies: Python, Django, FastAPI, LangChain, Pinecone, Next.js, React, Go, Gin-Gonic, JavaScript, PostgreSQL, MSSQLCE, Retrieval-augmented Generation (RAG), Google Cloud Platform (GCP), Tailwind CSS, REST APIs, Microsoft Excel, APIs, Back-end, MySQL, API Architecture, MongoDB, Asynchronous Development, CI/CD Pipelines, Artificial Intelligence (AI), ChatGPT API, Full-stack Development, Web Development, Cloud Architecture, Amazon Web Services (AWS), Agentic AI, Code Deployment, AI Integration, Laravel, PHP, DevOps

Freelance Developer

2017 - 2025
Freelance
  • Built Solana smart contracts and Web3 applications. Developed NFT generation and minting solutions for multiple clients.
  • Delivered solutions, including data analysis, web scraping, API integrations, and automation tools for diverse clients across industries.
  • Built various automation tools to save developers' time.
Technologies: Python, JavaScript, TypeScript, Go, Java, Rust, SQL, Vercel, REST APIs, Microsoft Excel, APIs, Back-end, MySQL, API Architecture, MongoDB, Asynchronous Development, CI/CD Pipelines, Artificial Intelligence (AI), ChatGPT API, Full-stack Development, Web Development, Cloud Architecture, Amazon Web Services (AWS), Code Deployment, AI Integration, DevOps

Software Engineer

2022 - 2023
Ananas eCommerce
  • Designed and implemented a high-performance microservices architecture. Conducted proactive testing and performance optimization, identifying and resolving bottlenecks before production deployment.
  • Built and maintained core eCommerce services, including payment processing, inventory management, and order fulfillment systems, handling 100s of transactions daily.
  • Developed Python-based automation solutions that streamlined internal workflows and reduced manual processing time.
Technologies: Java, Spring Boot, Python, Kubernetes, REST APIs, APIs, Back-end, MySQL, API Architecture, MongoDB, Asynchronous Development, CI/CD Pipelines, Artificial Intelligence (AI), ChatGPT API, Full-stack Development, Cloud Architecture, Amazon Web Services (AWS), Code Deployment, AI Integration, DevOps

Full-stack Developer

2020 - 2021
Threedium
  • Integrated and configured 3D models for Android and iOS using Java and JavaScript.
  • Developed several interactive websites using 3D models.
  • Created the web-based promotional collaterals for different campaigns.
Technologies: JavaScript, Java, Python, Node.js, React Query, Microservices, Front-end, CSS, HTML, API Integration, REST APIs, APIs, Back-end, MySQL, API Architecture, Full-stack Development, Amazon Web Services (AWS), DevOps

Experience

Enterprise eCommerce Platform

Served as a core engineer on a large-scale eCommerce system, similar in complexity to Amazon, managing approximately 15 microservices that supported logistics, barcode scanning, delivery flow, returns processing, claims, inventory, and customer experience.

I designed and shipped high-performance back-end features across multiple microservices and improved operational reliability through proactive testing and performance analysis.

Intelligent Document and Knowledge Assistant Platform

A platform where companies upload internal documents, such as PDFs, manuals, policies, and procedures, which are processed into a searchable knowledge base. Users can interact with individual documents or the entire workspace and receive contextual answers.

I designed a secure upload pipeline with automatic document parsing and embedding, and implemented semantic search and conversational retrieval. I also built UI for multi-user collaboration, document organization, and chatbot interactions.

Crowd Task Platform | Voice, Image, Survey, and Action Tasks

A platform where users complete micro-tasks, such as voice recordings, uploading images, completing surveys, visiting URLs, etc., and receive payouts in crypto or fiat currencies. Businesses create tasks through a back-office dashboard, define validation rules, and access aggregated insights.

I designed back-end architecture for task creation, user workflows, submissions, and verification sessions, implemented dashboards for both creators and validators with filtering, statistics, and payout management, and integrated payment modules, anti-fraud mechanisms, and data-extraction pipelines.

On-chain Stock Trading with NFT Positions

A decentralized finance platform where users open long/short positions in a native token and receive NFTs representing their opened positions. The NFT serves as proof of ownership, can be traded, or burned to settle the trade.

I designed smart-contract logic for opening/closing positions and NFT issuance, created price-oracle integration and P&L settlement logic, and built UI for wallet connection, trading, claiming, and portfolio tracking.

Kernel for x8086

Developed a fully functional educational operating-system kernel for x8086-based processors. I also implemented scheduling, threading, memory management, and synchronization primitives, and created semaphores, events, and support for multithreading.

MicroJava Compiler

A compiler for the MicroJava programming language, featuring lexical, syntax, and semantic analysis and generating executable bytecode for the MicroJava virtual machine.

I built a comprehensive compilation pipeline, including a parser and a semantic analyzer, and generated VM-compatible executable code with accurate stack and symbol handling.

Education

2017 - 2024

Bachelor's Degree in Software Engineering

University of Belgrade, School of Electrical Engineering - Belgrade, Serbia

Certifications

JANUARY 2023 - PRESENT

Young Leader | Leadership Development Program

Delta Holding

Skills

Libraries/APIs

React, Web3.js, Node.js, REST APIs, React Query

Tools

Git, Slack, Microsoft Teams, GitHub, JFlex, Jira, Notion, Microsoft Excel

Languages

Python, JavaScript, TypeScript, SQL, CSS, HTML, Java, Go, Rust, C++, Assembly, UML, PHP

Frameworks

Django, Next.js, Spring Boot, Tailwind CSS, Laravel, Gin-Gonic

Paradigms

Object-oriented Programming (OOP), Microservices, API Architecture, Asynchronous Development, Agile Software Development, Testing, DevOps

Platforms

Docker, AWS IoT, Software Design Patterns, Visual Studio Code (VS Code), Vercel, Amazon Web Services (AWS), Apache Kafka, Kubernetes, Google Cloud Platform (GCP)

Storage

PostgreSQL, Databases, MySQL, MongoDB, MSSQLCE

Other

FastAPI, Version Control, Front-end, API Integration, APIs, Back-end, CI/CD Pipelines, Software Architecture, Artificial Intelligence (AI), ChatGPT API, Full-stack Development, Web Development, Cloud Architecture, Code Deployment, AI Integration, LangChain, Pinecone, Retrieval-augmented Generation (RAG), Leadership, Business, Communication, Consumer Behavior, Vector Databases, Algorithms, Data Structures, Operating Systems, Computer Architecture, Compilers, Distributed Systems, Networks, ClickUp, Full-stack, Agentic AI

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