Nazar

NAZAR HLUKHANIUK
NODE.JS DEVELOPER | AI INTEGRATION ● SUCEAVA, ROMANIA ● [відкрити контакти](див. вище в блоці «контактна інформація»)

DETAILS PROFILE

Suceava, Romania • Independently wrote an AI assistant based on OpenAI using Nest.js,
[відкрити контакти](див. вище в блоці «контактна інформація») implementing PDF Preview, Vector Search (based on PostgreSQL + pgvector),
[відкрити контакти](див. вище в блоці «контактна інформація») and document chunking (page by page) functionality.
• Optimized database queries, resulting in a ~40 % performance improvement
LINKS • Integrated third-party APIs, including payment systems (Square), cloud
LinkedIn integration, notification service (Twilio), AI integration, GetStream, and others

GitHub • Reduced image preview API response time from ~8.8s → ~1.6s (5.5× faster) by
optimizing Sharp processing pipeline with LRU caching.
Telegram

EMPLOYMENT HISTORY
SKILLS Middle+ Node.js Developer at ElementalsWeb
November 2025 — Present
Languages: TypeScript, JavaScript,
Tech stack: Node.js, Express.js, PostgreSQL, PrismaORM, Sequelize, Multer, AWS,
Java
DigitalOcean, Docker, JWT, BullMQ, ThreeKit API, Salesforce API, Zod, Nginx
Backend: Node.js, Express.js,
Working on many parts of a large ecosystem (admin panel, simulation api, tagging tool,
Nest.js, Spring Boot
2D/3D render)
DB: PostgreSQL (pgvector), MySQL, Middle Nest.js Developer at Wtt-Solutions, Dallas, Texas, United States
Elasticsearch, MongoDB, MariaDB February 2025 — March 2026
ORM / Data Access: Prisma, Tech stack: Node.js, Express.js, NestJS, PostgreSQL (pgvector), PrismaORM, Multer,
Sequelize, Hibernate, Spring Data Twilio, Swagger, AWS, Docker, OpenAI API, JWT, AI Integration, BullMQ, Square,
JPA WebSockets, GetStream, In-app purchase (Play Market, App Store), ngrok
Infrastructure: Docker, AWS (S3, Social Network:
SES), DigitalOcean, nginx
● real-time messaging system using WebSocket (Socket.IO) with Redis adapter for
Caching / Queues: Redis (caching, scalability
queues with BullMQ, sessions), in- ● development of the user suggestions algorithm, post suggestions algorithm, tag
memory caching (lru-cache) suggestions algorithm
Realtime: WebSocket (Socket.io) ● authorization/authentication with magic link (deep link verification)
Media / File Processing: Sharp, ● waitlist management system (join-waitlist, check-waitlist-status)
Multer, FFmpeg ● media upload handling with AWS S3 integration, automatic image/video
APIs / Integrations: OpenAI API, processing (sharp, FFmpeg)
Gemini AI, Twilio, Square, In-app ● email notification system with BullMQ job queue, Redis, and custom Handlebars
Purchases (Google Play, App Store), templates
ApcoPay, Threekit API, Salesforce ● native in-app purchase integration for iOS (App Store Server API) and Android
API, Telegram Client API, GetStream (Google Play Billing API)
Security: JWT, OAuth2, bcrypt ● real-time notifications using WebSocket gateway with Firebase Cloud Messaging
fallback
Validation: Zod, Yup, class-
transformer, class-validator ● global search (tags, posts, profiles) functionality with PostgreSQL full-text search
and Prisma ORM
Testing: Jest
● content moderation system with user reports, blocking, and admin review
API Documentation: Swagger workflows
Frontend (familiarity): React, ● post interactions (likes, comments)
Vue.js, Angular, HTML, CSS ● user subscription/following system with activity feeds and personalized content
Tools: Git, Postman, Insomnia, delivery
ngrok ● appreciations system
● automated media processing pipeline with job queues for thumbnail generation
and video transcoding
 ● OpenAPI/Swagger documentation
LANGUAGES Healthcare product:

Ukraine – native ● secure real-time chat between patients, staff, and clinics
● structured API access for clinics, employees, and clients
English – B2
● file and document upload handling
● 2FA using Twilio, AWS SES, and Authenticator apps
● custom interceptor to log user activity history
● create a metadata module for creating and adding custom fields to users
● working with BullMQ for email notification
● creating custom registration form templates for users
● adding Open API documentation
● implementation payment system from scratch
AI Assistant product:
● integrated Open AI Assistant
● authorization & authentication
● breaking down large manuals into chunks and indexing them page by page for the
PDF View implementation
● converting PostgreSQL to a vector database using the pgvector library
● working with prompts
● writing custom metrics to track assistant performance
Middle Node.js Developer at Viso, Lviv, Ukraine
Sep 2025 — Dec 2025
● Constant direct communication with the customer.
● Developed the admin panel, subscription module, forum, ticket module and
created email templates.
● Integrated the payment system using Apcopay.

Middle Nest.js Developer at SaleRow, Kyiv, Ukraine
January 2025 — March 2025
● Developing an ERP system for a construction company based in Germany.
● Working on various system modules, including real-time communication features.
● Implementing WebSockets to develop an in-app chat system, ensuring seamless
and instant messaging between users.
● Additionally, optimizing system performance and enhancing user experience
through efficient backend development

Facebook Ads | Manual QA | Web developer at Freelance, Remote
October 2018 — Present
● Setting up targeted advertising using Facebook Ads
● Manual testing of websites and applications
● Development of front-end/back-end parts

Junior Node.js Developer at Devstaff, Chernivtsi, Ukraine
February 2022 — March 2022

Junior Strong Java Developer at VF&Soft, Chernivtsi, Ukraine
May 2021 — October 2021
● Worked with GPS tracking
● Worked with Camunda BPMN
● Write unit tests

Junior Software (Java) Developer at Yukon Software Ltd., Chernivtsi, Ukraine
January 2020 — August 2020
● development of an internal project
 ● writing unit testing
● building project architecture

EDUCATION
Master, Management and Administration -> Accounting and Taxation, Institute of Trade
and Economics of State University of Trade and Economics, Chernivtsi
August 2022 — December 2023

Master, Computer Science, Yurii Fedkovych Chernivtsi National University, Chernivtsi
June 2019 — January 2020

Bachelor, Computer Science, Yurii Fedkovych Chernivtsi National University,
Chernivtsi
September 2017 — June 2019

Junior Specialist, Software development, Chernivtsi Polytechnic College, Chernivtsi
September 2013 — June 2017

INTERNSHIPS
Web UI Developer at InterCode, Chernivtsi
May 2023 — July 2023
● Took internal courses on Node.js, Express.js, and Angular.
● Developed projects from scratch.

Java Software Developer- Apprentice at Yukon Software, Chernivtsi, Ukraine
October 2019 — December 2020

COURSES
English course (B1+), Americana
February 2022

English course (B1), Americana
February 2020