AVAILABLE FOR PROJECTS

Human-Centered Innovation with Scalable Tech

I build scalable, real-time systems and intuitive digital experiences—blending AI’s power with human intuition to create technology that feels alive and retains the spark of human divinity.

TYPESCRIPT
REACT
NODE.JS
DOCKER
EXPRESS
PSQL

001 / EXPERTISE

Technical Skills

Focused on delivering high-performance web applications with modern technologies. Committed to continuous learning and best practices.

FRONTEND DEVELOPMENT

Specializing in modern, user-centric web applications

TYPESCRIPT

4+ years of production experience

Advanced
REACT

Enterprise-level applications

Advanced
NEXT.JS

Full-stack applications

Advanced

BACKEND DEVELOPMENT

Building scalable server-side solutions

NODE.JS

Production microservices

Proficient
EXPRESS

REST API development

Proficient
DOCKER

Container orchestration

Intermediate

DATABASE & INFRASTRUCTURE

Database design and infrastructure management

SUPABASE

Full-stack integration

Proficient
REDIS

Caching & queuing

Intermediate

4+

YEARS OF
DEVELOPMENT

$400K+

PRODUCT
IMPACT

AI-POWERED

WEB & CONTENT
SOLUTIONS

10+

DEVELOPERS
MENTORED

002 / ABOUT

About Me

Full-stack developer crafting thoughtful solutions that put people first

I believe in building technology that enhances rather than replaces human capabilities. With over four years of experience, I focus on creating applications that are both powerful and intuitive.

My approach combines technical expertise with a deep appreciation for human needs and experiences. I enjoy mentoring others and building tools that make a real difference in people's daily lives.

Core Skills

React, Next.js, TypeScript
Node.js, SQL, Supabase

Interests

Human-Centered Design
Tool Creation

FEATURED WORK

ALFAPHOX/REVIVE
2024

Designed and launched a white-label review management tool, contributing to a $400k+ product sale

CURRENT FOCUS

Building tools that amplify human capabilities

Creating intuitive, accessible interfaces

Fostering collaborative development environments

003 / FEATURED

WebMine | Distributed Web Scraping

NEXT.JS · TYPESCRIPT · DOCKER · REDIS

Distributed web scraping
powerful & simple

MICROSERVICES
DISTRIBUTED
FULL-STACK

A scalable web scraping platform built with Docker and Redis. Features distributed task processing, real-time progress tracking, and a modern Next.js frontend for searching and managing scraped data.

98

LIGHTHOUSE

5K+

DAILY USERS

99.9%

UPTIME

004 / WORK

Recent Projects

A selection of recent projects showcasing my expertise in full-stack development, from interactive user interfaces to robust backend systems.

2023

WebMine

Real-time analytics dashboard for tracking sales, inventory, and customer data

REACT
NODE.JS
TYPESCRIPT
STRIPE

Cutting Edge

technology

Modular

architecture

Modern

ui

2022

Flowty.io Real-Time Notification Center

Built with Firebase and TypeScript, significantly improving engagement and retention.

FIREBASE
TYPESCRIPT
REACT

1M+

Notifications Sent

15%

Retention Increase

2024

AI Content Optimization Tool

AI-powered content categorization tool using OpenAI's GPT-4, enhancing engagement workflows for Kent State University's OEOC.

OPENAI
NEXT.JS
SUPABASE
D3.JS

100K+

Content Analyzed

95%

accuracy

97

performance

2023

Alfaphox/Revive Ratings

A white-label review management tool that contributed to a product sale valued at over $400,000.

REACT
NODE.JS
TYPESCRIPT
FIREBASE

5K+

users

$400K+

revenue

80%

retention

2023

Progressive Web App for Maxwell Pipeline Services

A PWA designed to streamline operations, achieving several thousand monthly uses.

REACT
PWA
SUPABASE

10K+

Monthly Uses

40%

Efficiency Boost

2021

Automated Email Distribution System

SendGrid API-based automation reducing email processing time from 4-5 hours to 20-30 minutes.

PYTHON
SENDGRID
NODE.JS

500K+

emailsProcessed

10x

speedImprovement

005 / CONTACT

Let's Work Together

Currently available for freelance projects and full-time opportunities. Let's build something great together.

Response Time

Usually within 24 hours

Email

davidkalina@proton.me

CURRENTLY AVAILABLE

Open to discussing new projects and opportunities. Ideal project duration: 3-6 months.

Usually respond within 24 hours