๐ Top 3% of Talent in ๐๐-๐๐จ๐ฐ๐๐ซ๐๐ ๐ ๐ฎ๐ฅ๐ฅ-๐๐ญ๐๐๐ค ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ & Node.js Architecture
โก Building ๐๐-๐ฉ๐จ๐ฐ๐๐ซ๐๐ ๐ฉ๐ซะพ๐๐ฎ๐๐ญ๐ฌ, enterprise platforms, scalable microservices, and modern SaaS ecosystems
๐ง Using modern AI tools including Cursor, Claude Code, GitHub Copilot, GPT-4/GPT-4o, and Claude Sonnet/Opus
๐ค Experienced in AI agents, LLM integrations, AI automation, and multi-agent development systems
๐ Accelerating development with ๐๐-๐๐ฌ๐ฌ๐ข๐ฌ๐ญ๐๐ ๐๐ง๐ ๐ข๐ง๐๐๐ซ๐ข๐ง๐ , agentic coding, and automation-driven workflows
๐ป ๐๐๐๐ ๐๐๐ ๐๐๐
Full-Stack Web Development Master's - 10+ years of professional engineering expertise utilizing Node.js, React, Angular, and Vue.js to build high-performance web applications and secure enterprise software.
AI & Automation Systems Innovators - Custom LLM applications, RAG pipelines, and intelligent workflow automations seamlessly integrated into your infrastructure.
๐ ๐๐๐๐๐๐๐๐๐๐๐๐ ๐๐ ๐๐๐๐๐๐๐ (๐๐๐๐๐๐๐๐ & ๐๐๐๐๐๐ ๐๐๐๐๐๐)
10+ years of professional experience, 20,000+ engineering hours, and dozens of successful software launches delivered as a Senior Full Stack Developer and Technical Leader.
โพ Full-Stack Web Development for Enterprise & SaaS Platforms:
Engineered and launched custom AI-powered SaaS platforms that scale cleanly with 99.99% operational uptime.
Accelerated product development cycles by 40% by deploying optimized React/Vue component libraries and Test-Driven Development (TDD) workflows.
โพ Node.js Mastery & Backend Architecture:
Reduced server infrastructure costs by 50% by migrating legacy monoliths into scalable microservices using Node.js, Express, and NestJS.
Optimized heavy data-processing pipelines, reducing database latency by 70% via tailored PostgreSQL, MongoDB, and MySQL schemas.
โพ AI App Development & Workflow Automation:
Developed and integrated proprietary OpenAI GPT, Claude, and Gemini models into operational systems, increasing client workflow efficiency by 180%.
Successfully deployed secure applications with robust CI/CD pipelines and built-in third-party API integrations.
๐ฏ ๐๐๐๐๐ ๐ ๐๐๐๐๐๐๐ (๐๐๐๐ ๐๐๐๐๐๐๐๐๐)
As a Full Stack Developer & Solution Architect: I handle the full lifecycle of Full-Stack Web Development, designing modular microservices architectures, defining technical roadmaps, and ensuring clean, maintainable code.
As a Front-End Development Expert: Crafting pixel-perfect, highly responsive user interfaces using React, Angular, Vue.js, TypeScript, and modern HTML5/CSS3 to ensure premium UX and maximum conversion rates.
As a Back-End Development Authority: Designing ultra-fast, secure RESTful APIs and core services with Node.js (Express/NestJS) and GraphQL implementation.
As a Cloud & DevOps Engineer: Implementing enterprise-grade cloud deployments via AWS, Azure, or GCP, utilizing Docker and Kubernetes orchestration along with automated CI/CD pipelines.
๐ ๐๐๐๐ ๐๐๐๐๐ & ๐๐๐๐๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐๐
Frontend Suite: React, Angular, Vue.js, TypeScript, JavaScript, HTML5, CSS3, Responsive Web Design.
Backend Core: Node.js (10+ Years), Express.js, NestJS, GraphQL.
Databases & Caching: MongoDB, PostgreSQL, MySQL, Redis.
APIs & Global Integrations: RESTful API Design, GraphQL, Webhooks, Stripe, Third-Party Systems.
Cloud & DevOps Platform: AWS, Docker, Kubernetes, Git, CI/CD Pipelines, Test-Driven Development (TDD).
๐ง ๐๐๐๐ ๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐๐๐
AI & SaaS Startups: Rapid MVP development, RAG pipelines, AI chatbots, and predictive analytics tools.
FinTech & E-commerce: High-load payment gateways, customized checkout solutions, compliance, and ledger systems.
Enterprise Automation: Heavy B2B platforms, marketplaces, microservices infrastructure, and cross-platform integrations.
โก ๐๐๐ ๐๐ ๐๐๐๐ ๐๐๐๐๐๐๐๐
Strategic Discovery: We align your business goals, success metrics, and timeline constraints before writing a single line of code.
Architecture Blueprinting: We map out the core database schemas, frontend components, and Node.js microservices flows to ensure long-term scalability.
Agile Iteration: Backed by advanced AI-assisted engineering and industry best practices, I deliver high-velocity sprints with predictable, production-ready releases.
DevOps & Launch: Secure deployment utilizing Docker and Kubernetes with proactive, ongoing optimization based on product metrics.
Looking for a Senior Full Stack Developer and a Full-Stack Web Development expert to turn your complex concept into a world-class, scalable web platform?
๐๐๐ญโ๐ฌ ๐๐จ๐ง๐ง๐๐๐ญ! Send over your project brief, scope, or existing codebase notes, and Iโll provide a high-level strategic roadmap for your next big launch. โ๏ธ
Web Development
Node.js
Firebase Realtime Database
PostgreSQL
Vue.js
Quasar Framework
JavaScript
MongoDB
MySQL
Wireframing
Web Analytics
App Development
Back-End Development
Database Architecture
Tailwind CSS
Git
Software Architecture
HTML5
CSS 3
API Integration
Oleg C.
Kropyvnytskyi, Ukraine
$50/hr
5.0
18 jobs
Full-Stack Software Engineer - Ruby | Node | JS | Meteor
Accurate and well-organized, always looking for the efficient and elegant solutions.
Web development skills:
- Ruby, Ruby on Rails, Node, Meteor, PHP
- Ruby gems: Devise, Carrierwave, Paperclip, HAML, Capistrano, Resque, Sidekiq etc.
- TDD and Unit Testing with Cucumber, Rspec, Mocha
- Relational and NoSQL databases: MySQL, PostgreSQL, MongoDB, Redis, Sqlite
- Payment service integration: Paypal, Stripe, Braintree, Checkout, Inpendium
- Deployment platforms: Heroku, AWS, Rackspace, DigitalOcean, VPS, EngineYard
- Amazon Web Services: CloudFront, Elastic Load Balancer, RDS, ElasticCache, ElasticBeanstalk, etc.
- Continuous Integration Deployment: Tddium, Travis
- Web API and mobile integration
- Social network and third-party integration: Google Maps, Google API, Facebook, Slack, Twitter etc.
Other:
- DevOps skills: configuring deployment server, troubleshooting and debugging server issues
- Designing multilingual applications
- Git workflow
- Management tools: JIRA, Trello, Pivotal Tracker, Asana
JavaScript
HTML5
CSS 3
Ruby
MySQL
PostgreSQL
Ruby on Rails
RESTful API
Software Architecture
RESTful Architecture
Stripe API
PostgreSQL Programming
MySQL Programming
Ella H.
Kropyvnytskyi, Ukraine
$40/hr
4.9
31 jobs
โ 20+ years of enterprise engineering expertise
โ 100% Traceability & 0% Double-Allocation Inventory Ecosystems
Manual tracking, spreadsheet discrepancies, and fragmented multi-channel orders drain up to 30โ40% of operational efficiency, creating massive supply chain bottlenecks. We help mid-market manufacturers, B2B wholesale distributors, and global e-commerce brands eliminate siloed workflows by architecting unified digital operating systems. Specializing in high-impact operations automation, we design and build bespoke, multi-tenant cloud SaaS platforms, advanced Warehouse Management Systems (WMS), and robust Enterprise Resource Planning (ERP) tools that safely handle heavy operational scale without adding headcount.
โ๏ธ What We Do Best & Our Impact Metrics:
Custom ERP & WMS Platform Development: Engineering complete multi-role web architectures and secure mobile apps from scratch. Result: Replaced systems like Floorzap and legacy tools to drive 10x higher processing throughput for operations teams.
Multi-Channel & Multi-Tenant Integrations: Developing deep, automated sync pipelines between core databases and external environments. Result: Seamlessly managed over 400+ active SKUs via real-time Shopify Plus, Amazon SP-API, Faire, and QuickBooks Online financial networks.
Advanced Inventory Tracking & FEFO/FIFO Logic: Implementing granular lot tracking, expiration monitoring, serial numbers, and physical bin/shelf location mapping. Result: Reduced manual data capture errors by 45% and established total stock compliance in regulated spaces.
Automated Fulfillment & Shipping Workflows: Custom engineering sequential label printing, weight scale/dimensioner data capture, and AI exception-tracking. Result: Automated real-time CSV extraction directly to warehouse APIs, reducing administrative overhead by ~50%.
Hardware & Scan Integration Engine: Building native and hybrid mobile applications (React Native) utilizing DataWedge APIs for rugged Zebra PDA devices and real-time UPC barcode workflows. Result: Boosted on-the-floor sorting and dispatch validation speeds by 150%.
๐ Our Proven Operational Process:
Scope Discovery & Architecture Mapping: We analyze your existing workflows (including reviewing complex 20+ page specification documents, legacy DB architectures, and internal spreadsheets) to build an ironclad technical roadmap detailing milestones, data entity diagrams, and risk assessments.
Custom Execution & Clean Engineering: Building on top of secure, high-performance tech stacks (Next.js, Node.js, Supabase, PostgreSQL). We build scalable database schemas featuring Row-Level Security (RLS) for complete multi-tenant data isolation and continuous server health logging.
Deployment, QA & Infrastructure Scale: We ship code iteratively using strict GitHub PR reviews and automated Docker CI/CD pipelines to AWS, Vercel, or custom cloud servers, completing full functional validation inside sandboxed testing loops before turning systems live.
๐ ๏ธ Domain & Technology Expertise (Proven Results):
Platform & Architecture: Custom ERP, Multi-Tenant WMS SaaS, B2B Work Order Engines, Client Portals against Floor Plans.
Automations & Workflows: n8n, Zapier, Webhooks, Multi-Carrier API Integrations (ShipStation, UPS, FedEx, USPS), OpenClaw AI frameworks, ShipStation API Integration
Data & Logistics Core: PostgreSQL, Supabase RLS, Secure OAuth/M365 Integrations, Automated PDF Quotation Engines.
Frontend & Native Mobile: Next.js 14 (App Router), React, Tailwind CSS, Shadcn/ui, React Native (iOS & Android).
Whether you need to scale your operations to thousands of monthly movements, replace a legacy system without disrupting live trade, or deploy a commercial WMS SaaS platform to market, we turn messy logistics into clean code.
Ecommerce Backup & Migration
Custom Ecommerce Platform Development
Android
React
Ecommerce Performance Optimization
Front-End Development
Mobile App Development
Full-Stack Development
Business Operations
Warehouse Management
WMA
Logistics Management
Inventory Management
ERP Software
QR & Barcode Scanner
Shipping & Order Fulfillment Software
AI Development
API Integration
n8n
ShipStation
Roman Y.
Kropyvnytskyi, Ukraine
$35/hr
4.9
32 jobs
Iโm a Senior Backend Developer with 8+ years of hands-on experience building reliable, scalable backend systems using PHP (Laravel) and Node.js.
Most of my work is focused on backend architecture, API development, and performance optimization for real business products โ not demos or pet projects. Iโve worked with startups and established companies on SaaS platforms, CRM systems, fintech solutions, and e-commerce backends.
What I do best:
Backend development with Laravel and Node.js
Designing and building REST APIs
Working with high-load applications
Improving performance, stability, and security
Refactoring and maintaining existing codebases
Tech stack:
PHP 8+, Laravel, Lumen
Node.js, Express, NestJS
MySQL, PostgreSQL, MongoDB
Redis (cache, queues)
Docker, CI/CD
AWS, DigitalOcean
Git, GitHub / GitLab
APIs & integrations:
REST / JSON APIs
Payment systems (Stripe, PayPal)
Third-party services and webhooks
How I work:
I write clean, maintainable code and think about long-term scalability. I care about clear communication, realistic timelines, and delivering results that actually solve business problems. If something can be done better or simpler, Iโll say it.
Projects I can help with:
Backend from scratch
API for web or mobile apps
Refactoring legacy Laravel / Node.js code
Performance optimization
Ongoing backend support
If youโre looking for a backend developer who can work independently and take responsibility for the server side of your product โ feel free to message me.
HTML5
CSS
PHP
Bootstrap
jQuery
Laravel
RESTful API
MySQL Programming
API
Pavel L.
Kropyvnytskyi, Ukraine
$45/hr
5.0
19 jobs
Hello and welcome!
My name is Pavlo, and Iโm a seasoned Developer and DevOps Engineer from Ukraine (UTC+2). If you're looking for a skilled professional who can handle both development and infrastructure tasks, youโve come to the right place!
To save you time, hereโs a quick overview of my core expertise:
๐ DevOps Expertise
AWS โ Cloud Infrastructure Management
Kubernetes โ Orchestration & Scaling
Docker Swarm & Docker โ Containerization
GitLab, GitHub Actions, CircleCI, GitLab CI/CD โ CI/CD Pipelines
OpenStack โ Private Cloud Solutions
Digital Ocean โ Cloud Deployments
๐ป Development Skills
Python: Django, Flask, FastAPI
PHP: Laravel, WordPress, Yii
JavaScript: React.js
Databases: SQL & NoSQL (MySQL, PostgreSQL, MongoDB)
Third-Party API Integration: Seamless API Connections
Infrastructure Automation: Kubernetes, Docker, Puppet
Web Scraping: Data Extraction from Websites
Testing: Unit, Automation, and Integration Testing
Frontend: HTML, CSS3, SASS, LESS, JavaScript
Backend Stack: LAMP Stack
๐ ๏ธ Why Work With Me?
โ End-to-End Solutions: From backend APIs to frontend UIs and cloud deployment.
โ Clear Communication: Transparent updates and proactive problem-solving.
โ On-Time Delivery: Meeting deadlines is a top priority.
โ Client-Centric Approach: Your goals are my focus.
If you have a project in mind, feel free to drop me a message. Letโs bring your ideas to life!
Looking forward to working with you.
Best regards,
Pavel
CSS 3
Laravel
PHP
JavaScript
HTML
Python
Django
Machine Learning
Functional Programming
Anton S.
Kropyvnytskyi, Ukraine
$74/hr
4.9
16 jobs
I help startups build technically challenging products that are ready for production from day one.
Iโm a hands-on CTO, Principal Full-Stack Engineer, and software architect with 15+ years of experience building SaaS platforms, AI products, distributed systems, and high-performance backend services. While I have led engineering teams of 50+ people, I remain deeply involved in architecture, system design, and implementation.
What I can help you build
โข AI-powered SaaS applications
โข High-performance backend services in Rust or TypeScript
โข Complex web platforms from scratch
โข Distributed systems and microservice architectures
โข Cloud-native infrastructure on AWS
โข Technical architecture and engineering leadership
โข MVPs that can scale into production products
Selected experience
โข Built a production-ready ICANN-accredited domain registrar platform from scratch in Rust, including EPP, RDAP, DNS, DNSSEC, payment processing, registry integrations, and the complete domain lifecycle.
โข Led engineering for an enterprise AI platform indexing Gmail, Slack, GitHub, Notion, Google Calendar, and other business systems to power AI-assisted search and workflows.
โข Built chart.rs, a high-performance Rust charting engine designed for professional trading applications where rendering performance and low latency are critical.
โข Designed and delivered SaaS products used by hundreds of thousands of users, including platforms with over one million registered users.
โข Grew an engineering organization from a small core team to more than 50 engineers while introducing hiring processes, engineering standards, CI/CD, and scalable development practices.
Technical expertise
Languages: Rust, TypeScript, JavaScript, Python
Backend: Axum, Node.js, NestJS, GraphQL, PostgreSQL, Redis, REST APIs
Frontend: Angular, React, Next.js
Infrastructure: AWS, Docker, Kubernetes, Terraform, CI/CD
AI: OpenAI, Anthropic, AI Agents, RAG, LLM integrations
Why clients work with me
My clients hire me when they need someone who can make architectural decisions, move quickly, and still build software that will be maintainable years later.
Whether you need a senior engineer to solve difficult technical problems, a technical lead to guide a team, or a CTO-level partner to build a product from scratch, I focus on delivering software that is reliable, maintainable, and ready for production.
Letโs discuss your project.
Node.js
React
GraphQL
TypeScript
JavaScript
Web Application
Angular
Automated Testing
Next.js
Web Service
Database Development
Full-Stack Development
Web Development
Front-End Development
Back-End Development
API
SQL
MongoDB
Heroku
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