Kostiantyn D.
Verified expert
Kostiantyn D.
Verified expert
Top skills
Full-Stack Developer with 3 years of experience in JavaScript/TypeScript, Node.js, and
modern frameworks (Nest.js, Express.js, Next.js, React). Skilled in building scalable web
applications, real-time data processing systems, and social networking features for SaaS,
FinTech, and e-learning domains. Experienced in API development and integration,
microservices architecture, and cloud infrastructure.
Hard skills
JavaScript
TypeScript
HTML / CSS
REST API
Microservices
CI/CD
Containerization
Code review
Tools
Node.js
React.js
Next.js
Angular
MUI
Nest.js
Express.js
Fastify
MySQL
PostgreSQL
MongoDB
Redis
Docker
AWS
GitHub Actions
Postman
N8N
Stripe
Soft skills
Attention to Detail
Reliable
Open-minded
Flexible
Team Player
Problem Solving
Diligent
Determined
Smart Lead Generation Platform for Real Estate Professionals
September 2024 - September 2025
Full Stack Developer
Project Description:
SaaS web platform tailored for real estate professionals to discover and connect with leads efficiently. It leverages integrated data sources and automated outreach tools. As a full-stack developer, I contributed to both front-end and back-end development focusing on improving user-facing features, enhancing API integrations, and supporting the platform’s AWS-based infrastructure.
Tools & Technologies:
TypeScript, Node.js, Nest.js, PostgreSQL, Fastify, Next.js, MUI, GitHub Actions, AWS, Mailgun, Stripe, Mapbox, Tracers
Crypto Trading Analytics Platform
April 2023 - September 2024
Back-End Developer
Project Description:
A comprehensive analytics platform designed to aggregate and visualize a user's trading performance in real-time from multiple cryptocurrency exchanges, including Binance, Bybit, and ICMarkets
Tools & Technologies:
Nest.js, Next.js, WebSockets, TypeScript, REST APIs, PostgreSQL
Community Social Network for E-Learning Platform
September 2022 - April 2023
Full Stack Developer
Project Description:
A full-featured social networking platform integrated within an online learning environment, designed to foster community engagement, peer-to-peer communication, and student-instructor interaction
Tools & Technologies:
Express.js, Next.js, React, Node.js, WebSocket, MongoDB
National University "Odessa Law Academy"
Law
Node.js
Provider: Hillel IT school
Node.js
Provider: Hillel IT school
Typescript
Provider: Hillel IT school
Typescript
Provider: Hillel IT school
Front-End Pro
Provider: Hillel IT school
Front-End Pro
Provider: Hillel IT school
Mastering React
Provider: Codefinity
Mastering React
Provider: Codefinity
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This freelancer has not participated in any projects yet.
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