Kostiantyn D.
Verified expert
Top skills
Kostiantyn D.
Verified expert
Meet Kostiantyn ✨
A Full Stack Developer with three years of experience building scalable web applications, real-time data processing systems, and social networking features across SaaS, FinTech, and e-learning domains. Kostiantyn works confidently with JavaScript and TypeScript across the full stack, using Nest.js and Express on the backend and React and Next.js on the frontend.
He has delivered production platforms including a SaaS lead generation system for real estate professionals with automated outreach and AWS infrastructure, a crypto trading analytics platform aggregating real-time performance data from Binance, Bybit, and ICMarkets via WebSockets, and a community social network integrated into an online learning environment.
Kostiantyn focuses on clean API development, microservices architecture, and cloud infrastructure. Based in London, he brings fluent English communication and hands-on experience with containerized deployments, CI/CD automation, and third-party integrations including Stripe, Mapbox, and Mailgun.
If you need a full stack developer who can build reliable web platforms with real-time features, strong API design, and modern cloud infrastructure, Kostiantyn is ready to deliver production-quality results from day one 🚀
Download the CVHard skills
JavaScript
TypeScript
Node.js
React
Next.js
Nest.js
Express.js
Fastify
Angular
Redux
MUI
HTML
CSS
REST API Development
Microservices Architecture
WebSockets
GraphQL
SQL
PostgreSQL
MySQL
MongoDB
Redis
Docker
AWS
CI/CD
GitHub Actions
Stripe Integration
Containerization
Code Review
Tools
Git
GitHub
GitHub Actions
Postman
N8N
Stripe
Mapbox
Mailgun
Docker
AWS
Soft skills
Attention to detail
Reliability
Problem solving
Adaptability
Team collaboration
Communication
Ownership
Continuous learning
Smart Lead Generation Platform for Real Estate Professionals
Full Stack Developer
Project Description:
Developed frontend and backend features for a SaaS platform helping real estate professionals discover leads and automate outreach workflows. Contributed to API integrations, user-facing features, and AWS-based infrastructure including payment processing with Stripe and location services with Mapbox.
Tools & Technologies:
TypeScript, Node.js, Nest.js, PostgreSQL, Fastify, Next.js, MUI, GitHub Actions, AWS, Mailgun, Stripe, Mapbox
Crypto Trading Analytics Platform
Back-End Developer
Project Description:
Built the backend for a real-time analytics platform that aggregates and visualizes trading performance across multiple cryptocurrency exchanges including Binance, Bybit, and ICMarkets. Implemented WebSocket connections for live data streaming and REST APIs for historical data access.
Tools & Technologies:
Nest.js, Next.js, WebSockets, TypeScript, REST APIs, PostgreSQL
Community Social Network for E-Learning Platform
Full Stack Developer
Project Description:
Developed a full-featured social networking platform integrated within an online learning environment. Built features for peer-to-peer communication, community engagement, and student-instructor interaction with real-time messaging capabilities.
Tools & Technologies:
Express.js, Next.js, React, Node.js, WebSocket, MongoDB