Hi! I'm Vasyl.
Hope you are having a good week so far.
Full stack development is what I have chosen to do and work for during the last 11 years.
I can develop and support:
◾ Fixing and skinning components with the use of multiple sets of languages and technologies.
◾ Front-end technologies: JavaScript, Angular.js, React/Redux, Angular 2+, jQuery
◾ Back-end technologies: Node.js, Java, C++
◾ Databases (development and administration): MySQL, MongoDB, PostgreSQL, SQlite, NoSQL
◾ Creation and consumption of REST and SOAP API’s
◾ VCS: Git, Github, Subversion, Bitbucket
Other experience:
◻️Managing projects using Agile methodologies: SCRUM, Kanban.
◻️Cloud Services: AWS, Firebase, Digital Ocean, Heroku
I'll need you to answer a few questions about your business and your project. Once I have that information, I'll do some research to see how I can help you.
Message me now to set up a time to talk.
React
Angular
Amazon Web Services
React Native
JavaScript
Java
Augmented Reality
Virtual Reality
Kofax RPA
SaaS
Maksym M.
Lviv, Ukraine
$30/hr
5.0
19 jobs
As a software developer since 2005, I've worked across various professional fields, including:
• E-commerce and AI API integrations
• Multimedia, rich user interfaces and game development
• Web development: frontend, backend and middleware
• Databases and CRM solutions
• Accounting and real estate industry solutions
• Interactive mapping, navigation and weather services
Adobe Flex
macOS
JavaScript
Microsoft Windows
Desktop Application
ActionScript
React
Adobe AIR
Dropbox API
ExpressJS
Adobe Flash
Commerce Cloud
Tetiana S.
Lviv, Ukraine
$10/hr
5.0
1 jobs
Hello!
My name is Tetiana, I am from Ukraine and have 10+ years’ experience in the web-development and coding any design in responsive template.
I'm a Master of Computer Applications (MCA), Applied Mathematics, L'viv National university.
I have solid knowledge of HTML | CSS | Bootstrap, strong knowledge in JavaScript | jQuery, familiar with сrossbrowser coding, experience in responsive html | CSS both for mobile and desktop applications, extensive experience in Photoshop | Illustrator | Figma, basic experience of using SVN | GIT | Python
I am a fast learner, problem solver, with great attention to detail. Communicative team player, yet comfortable with independently owning a project end-to-end;
⭐ My Super Skills
===============
✔ HTML / HTML5
✔ CSS / CSS3
✔ Bootstrap
✔ Flex
✔ React.js
✔ Photoshop
✔ Illustrator
✔ Figma
⭐ My Strengths
==============
✔ Fast learner
✔ Great attention to detail
✔ Fast and high-quality project execution
✔ Superb sense of style and taste
✔ Perfect understanding of customers
✔ Support and quick response
✔ Managing and prioritizing projects within tight deadlines
📷 The websites I've worked on in the past are displayed in my portfolio below.
Let's get started on a successful journey from here. Please contact me if you need any assistance.
Adobe Illustrator
Canva
Figma
JavaScript
jQuery
Adobe Photoshop
Bootstrap
HTML
CSS
Web Design
Andrew S.
Lviv, Ukraine
$45/hr
4.9
19 jobs
🧠🤖I design, build and scale AI Agent solutions that automate real business workflows - not demos, not experiments, but production-ready systems that actually run companies.
If you’re looking to build AI Agent that can think, act, integrate with your tools and improve over time, you’re in the right place.
I work as an AI Agent Developer and Agentic AI Developer, helping founders, teams and companies turn complex processes into reliable AI Agent Automation systems - from internal ops to customer-facing products.
📊 Numbers that reflect real AI Agent outcomes
✅ 12+ years in AI systems, AI Agent development, full stack & software engineering
✅ 85+ digital products delivered, including AI Agent platforms and AI automation systems
✅ 57+ MVPs launched - many built around an AI Agent or agentic workflows
✅ 40+ production systems with AI Agent automation used by real users
✅ 32+ products prepared for investor demos, AI feasibility reviews & technical due diligence
✅ $2.2B+ raised by products I helped build or scale
✅ 30-45% faster launches using reusable AI Agent frameworks and automation pipelines
✅ 40% fewer post-launch issues thanks to stable AI Agent logic and controlled integrations
✅ 100% code ownership - every AI Agent stays fully in your repositories
✅ Clients working with me for 7+ years 🤝
Most projects start with one clear goal: replace manual work with an AI Agent that can operate independently.
That can mean:
→ An AI Agent that handles support, research or acts as a sales agent embedded into real business workflows
→ A backend AI Agent orchestrating APIs and business logic
→ An AI Voice Agent for calls, bookings or assistants
→ A multi-agent system acting as a full AI Automation Agency replacement
As an AI Agent Builder, I create systems that reason, plan and execute - not just respond.
This includes:
→ AI Agent Creation using modern agentic patterns
→ AI Agent Automation across CRMs, databases, internal tools and business development workflows
→ AI Agent n8n workflows for orchestration and scalability
→ Custom AI API Integration with existing platforms
Each AI Agent is designed to be reliable, explainable and easy to extend.
🧩I approach every project as an AI Developer first, not a prompt engineer.
As an Open AI Developer and AI Developer LangChain practitioner, I build AI Agent systems with:
• Proper state management
• Tool calling and function execution
• Memory, context control and fallback logic
• RAG pipelines (as an AI Developers RAG specialist)
• AI-first architecture
This allows each AI Agent to retrieve knowledge, reason over it and act safely in real environments.
When needed, I design AI Agent Automation stacks that behave like a full AI Agency, but fully owned by you.
💡Beyond one-off bots - real agentic systems
A simple chatbot isn’t an AI Agent.
A real AI Agent understands goals, chooses actions and completes tasks end-to-end.
That’s where Agentic AI Developer experience matters.
I build:
→ Single-purpose AI Agent tools (e.g. Pinterest marketing AI Agent or Etsy marketing AI Agent)
→ Multi-agent systems coordinating tasks
→ Internal AI Agent Creator platforms
→ Long-running AI Agent services
Whether you need an AI Agent Builder for MVP speed or a production-grade AI Agent Automation system, the focus stays the same: stability, control and measurable impact.
Strong foundations first - AI when it makes sense 🧠🔧
Every AI Agent I build sits on solid engineering foundations.
I combine AI Agent Development with backend systems, APIs and infrastructure so your AI Agent doesn’t collapse under real usage.
⚙️This includes:
• Backend services for AI Agent logic
• Secure AI API Integration
• Scalable pipelines for AI Agent Automation
• Monitoring, logging and iteration loops
AI should reduce chaos.
🧭 Not every problem needs AI from day one
If your project doesn’t require advanced AI immediately, I also help design and build data pipelines, backend services, APIs, dashboards and MVP infrastructure that work perfectly on their own.
This keeps products stable, cost-efficient and flexible - ready to introduce ML or AI features later, without forcing complexity too early.
🔍 How I usually work on AI Agent projects
1️⃣ Understand business goals, constraints and where an AI Agent creates real leverage
2️⃣ Design the right AI Agent architecture (tools, memory, APIs, automation) - not hype
3️⃣ Build and refine the AI Agent iteratively with clear milestones and validation
4️⃣ Test, launch, monitor and evolve the AI Agent in real-world usage
🧰 Core tech stack
- Frontend: React, Next.js, TypeScript
- Backend: Node.js, Python (FastAPI, Flask, Django)
- AI & Agents: OpenAI APIs, LangChain, RAG pipelines, Agentic AI patterns
- Automation: AI Agent n8n, custom orchestrators
- APIs: REST API, GraphQL, Webhooks
- Databases: PostgreSQL, MongoDB, Redis
- Cloud & DevOps: AWS, Docker, CI/CD
- Architecture: SaaS platforms, AI Agent Automation, clean code
Have an AI idea in mind?
Let’s make it live.
Python
JavaScript
TensorFlow
Machine Learning
Deep Learning
Artificial Intelligence
AI Bot
Natural Language Processing
Computer Vision
Data Science
Data Analysis
PyTorch
Neural Network
Lead Generation
Data Entry
Automation
API Integration
Data Scraping
Zapier
AI Agent Development
Andriy T.
Lviv, Ukraine
$65/hr
4.9
42 jobs
I build AI agents that survive contact with production — not demos.
Over the last two years I've shipped agentic systems that plan, call tools, and run unattended in real time: a vendor-neutral multi-agent control plane (Go + React), a local AI business analyst that turns meeting recordings into assigned tasks (Python + React), and LLM workflows embedded into existing products for teams that needed results in weeks, not quarters.
What that looks like in practice:
• Agent architecture — planning loops, tool calling, memory, multi-agent orchestration, human-in-the-loop checkpoints
• RAG and retrieval — chunking strategy, embeddings, vector search (Qdrant / pgvector), and evaluation so you know retrieval actually improved
• LLM workflow automation — document, transcript and data pipelines that run without a human babysitting them
• Production plumbing — observability, cost and latency control, evals, provider fallbacks
• Self-hosted and local models when the data can't leave the building
Behind the AI work is 16 years of full-stack engineering: Go, Python, TypeScript/React, Next.js, Node.js, AWS, PostgreSQL, MongoDB. That's why my prototypes don't get thrown away — the MVP I ship in days is the same codebase you scale in months.
On Upwork: $500K+ earned, 18,000+ hours, 100% Job Success, including an 8,600-hour engagement leading the frontend of a security platform.
How I work: short discovery, a working slice fast, then iterate with you in the open. I stay with the product after launch.
If you have an agent idea, a workflow you want automated, or an AI feature stuck between prototype and production — tell me what it should do, and I'll tell you honestly whether it's a two-week build or a two-month one.
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Emerald Tiger
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Kinetic Investments
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Katja Krohn
Summa Linguae
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