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
4+ years of production experience
Enterprise-level applications
Full-stack applications
BACKEND DEVELOPMENT
Building scalable server-side solutions
Production microservices
REST API development
Container orchestration
DATABASE & INFRASTRUCTURE
Database design and infrastructure management
Full-stack integration
Caching & queuing
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
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
004 / WORK
Recent Projects
A selection of recent projects showcasing my expertise in full-stack development, from interactive user interfaces to robust backend systems.
AI Content Optimization Tool
AI-powered content categorization tool using OpenAI's GPT-4, enhancing engagement workflows for Kent State University's OEOC.
100K+
Content Analyzed
95%
accuracy
97
performance
Alfaphox/Revive Ratings
A white-label review management tool that contributed to a product sale valued at over $400,000.
5K+
users
$400K+
revenue
80%
retention
Progressive Web App for Maxwell Pipeline Services
A PWA designed to streamline operations, achieving several thousand monthly uses.
10K+
Monthly Uses
40%
Efficiency Boost
Automated Email Distribution System
SendGrid API-based automation reducing email processing time from 4-5 hours to 20-30 minutes.
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
davidkalina@proton.me
CURRENTLY AVAILABLE
Open to discussing new projects and opportunities. Ideal project duration: 3-6 months.