๐๐ ๐ฒ๐๐๐ซ๐ฌ. ๐๐๐ ๐ฃ๐จ๐๐ฌ. ๐ ๐ฌ๐ญ๐๐ซ๐ฌ. ๐,๐๐๐+ ๐ก๐จ๐ฎ๐ซ๐ฌ ๐จ๐ง ๐ฅ๐จ๐ง๐ -๐ญ๐๐ซ๐ฆ ๐๐จ๐ง๐ญ๐ซ๐๐๐ญ๐ฌ.
๐ฅ ๐ ๐๐๐ ๐๐ข๐ฌ๐๐จ๐ฏ๐๐ซ๐ฒ ๐๐๐ฅ๐ฅ for new projects. ๐ ๐๐๐ ๐๐จ๐๐ ๐ซ๐๐ฏ๐ข๐๐ฐ for existing ones.
๐-๐ฐ๐๐๐ค ๐ญ๐ซ๐ข๐๐ฅ - not happy, you pay nothing. ๐-๐ฆ๐จ๐ง๐ญ๐ก ๐๐จ๐๐ ๐ฐ๐๐ซ๐ซ๐๐ง๐ญ๐ฒ included ๐ฅ
๐๐๐ฌ๐ฌ๐๐ ๐ ๐ฆ๐ โ๐ ๐๐๐โ and Iโll match you with the right offer.
As a founder and lead engineer at Cortexiva, I personally review the architecture and delivery of every project.
๐ฅ We build production-ready web products end to end:
- React and Next.js frontends with clean, responsive interfaces
- Node.js or Python backends with scalable business logic
- Authentication, roles, subscriptions, dashboards and API integrations
- PostgreSQL, MongoDB, AWS, Docker and CI/CD
- OpenAI, RAG and AI automation built into existing or new products
๐ฅ ๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐:
- AcellusHealth - Full-cycle healthcare platform with multi-role workflows. React, Django, PostgreSQL, AWS.
- Inkeep - AI knowledge assistant with RAG and source-cited responses. Next.js 12 to 15 migration, Supabase integration, +40% performance.
- SpotBOI - Full-stack AI SaaS with custom workflows and subscription logic. React, Node.js, OpenAI, LangChain.
- ChangePlan - Enterprise SaaS with dashboards, role-based access and reporting. React, Meteor, MongoDB.
- Uprise - B2B wellbeing SaaS with employee tracking and HR analytics. React, TypeScript, Django, AWS.
๐ฅ ๐๐๐๐ ๐๐๐๐๐:
- Frontend: React, Next.js, TypeScript
- Backend: Node.js, NestJS, Express, Python, Django, FastAPI
- Data & Cloud: PostgreSQL, MongoDB, AWS, Docker, CI/CD
- AI: OpenAI, RAG, LangChain, AI assistants and automation
๐ฅ ๐๐๐๐ ๐ ๐๐ ๐ ๐๐:
- Founders launching web or AI MVPs
- SaaS teams building or scaling React, Node.js and Python products
- Companies adding AI to an existing platform
- Teams needing a reliable long-term full-stack partner
๐ฅ ๐๐ฏ๐๐ข๐ฅ๐๐๐ฅ๐ ๐ญ๐จ๐๐๐ฒ - ๐๐ซ๐จ๐ฉ ๐ฆ๐ ๐ ๐ฆ๐๐ฌ๐ฌ๐๐ ๐ ๐๐ง๐ ๐ฅ๐๐ญโ๐ฌ ๐ ๐๐ญ ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ซ๐จ๐ฃ๐๐๐ญ ๐ฆ๐จ๐ฏ๐ข๐ง๐ .
Django
CSS
JavaScript
Python
React
Node.js
TypeScript
HTML
Redux
React Native
HTML5
MySQL
Vue.js
ExpressJS
MongoDB
Tailwind CSS
PHP
Web Design
Bootstrap
CSS 3
Arshak G.
Yerevan, Armenia
$35/hr
4.9
48 jobs
I am an Expert-Vetted and Top Rated Plus Full Stack Web Developer with nearly 15 years of experience, 15,000+ hours completed on Upwork, 100% Job Success, and $300K+ in project earnings. I specialize in building scalable web applications, designing robust APIs, and delivering high-performance software solutions for startups, SaaS companies, and enterprise organizations.
Throughout my career, I have successfully delivered 150+ web applications, 350+ API integrations, 80+ SaaS platforms, and 200+ enterprise solutions across Healthcare, FinTech, Cybersecurity, AI, eCommerce, Logistics, HR Tech, and Legal Tech. My expertise covers the complete software development lifecycleโfrom architecture and backend development to frontend implementation, cloud deployment, optimization, and long-term maintenance.
My core expertise includes Full Stack Development, PHP Development, Python Development, API Development, API Integration, Web Development, Back-End Development, Laravel, Custom PHP, JavaScript, HTML5, CSS3, MySQL, Database Optimization, and AWS Cloud Architecture.
Over the years, I have delivered 350+ API integrations, maintained 99.9% production uptime across mission-critical systems, improved API response times by up to 80%, reduced infrastructure and database bottlenecks by as much as 60%, built applications supporting more than 5 million users, developed systems processing over 25 million API requests per day, and completed 200+ third-party integrations with payment gateways, CRMs, ERPs, cloud services, and business platforms.
I have extensive experience developing secure REST APIs, integrating third-party services, modernizing legacy systems, stabilizing AI-generated applications, optimizing database performance, and building scalable architectures capable of supporting millions of users and high-volume workloads.
Recent project highlights include enterprise healthcare platforms, cybersecurity solutions, procurement systems, AI-powered SaaS applications, workflow automation tools, eCommerce platforms, cloud-native business applications, and complex legacy application modernization.
Whether you need to build a product from the ground up, modernize an existing application, integrate complex APIs, improve performance, or rescue a struggling project, I focus on delivering reliable, maintainable, and production-ready software that creates long-term business value.
Profile updated: 04 09 2026
CSS
JavaScript
Python
Web Development
API
Full-Stack Development
PHP
API Development
HTML5
React
Laravel
Web Application
API Integration
Ecommerce Website Development
MySQL
Node.js
RESTful API
Shopify
Evgenii L.
Tsaghkadzor, Armenia
$100/hr
5.0
24 jobs
Need to build an AI system over your data (RAG, LLM workflows, automation) โ not just a demo, but something that works reliably in production?
I design and deliver AI-powered backend systems: RAG pipelines, LLM apps, semantic search, and automation integrated with real business data (APIs, databases, documents, search indexes).
Recently, Iโve built systems combining OpenAI / Anthropic / DeepSeek with Pinecone, OpenSearch, Snowflake, PostgreSQL, LangChain, and async pipelines (Celery) for knowledge search, lead processing, messaging, analytics, and automation workflows.
16+ years building production SaaS, high-load APIs, and data-heavy systems.
---
๐ค AI Systems & LLM Work
- RAG pipelines over structured + unstructured data (embeddings, vector search, semantic search, contextual answers)
- OpenAI-powered knowledge assistant using embeddings + Pinecone vector retrieval + context-aware prompt construction
- LangChain SQLDatabaseChain integration for PostgreSQL-backed fallback retrieval
- LLM-powered workflows (prompt pipelines, structured outputs, streaming responses)
- Real-time streaming AI chat using Django StreamingHttpResponse / SSE-style responses
- AI integrated into production systems (Celery, async jobs, retries, batching, monitoring)
- Model routing with company/prompt-level fine-tuned model support and fallback handling
- Real-world use cases: enrichment, classification, messaging automation, Q&A, data processing
---
๐ง What I can build for you
- RAG systems over your internal data (documents, databases, search, QA, assistants)
- AI-powered knowledge assistants and semantic search tools
- LLM-powered automation (lead processing, emails, enrichment, classification)
- Internal AI tools for operations, support, analytics, and data workflows
- Backend systems integrating LLMs into real production workflows (not isolated scripts)
---
โ๏ธ Backend, APIs & System Design
- Python, Django, Django REST Framework, FastAPI
- API design, auth, permissions, business logic orchestration
- Webhooks & integrations (Stripe, SendGrid, Nylas, Zapier, OpenAI, etc.)
- High-load async systems (Celery + Redis, queues, retries, scheduling)
- Production-safe error handling, fallback logic, logging, and debugging
---
๐ Data, Search & RAG
- PostgreSQL/Aurora, Snowflake
- OpenSearch / Elasticsearch, Pinecone
- Embeddings, vector search, semantic search, context retrieval
- Data modeling, ETL pipelines, complex SQL, performance tuning
- Enrichment, deduplication, segmentation, scoring systems
---
โ๏ธ Infrastructure & Delivery
- AWS (S3, Lambda), Docker, Nginx
- CI/CD, production deployments, monitoring
- Reliable systems for high-throughput and data-heavy workloads
---
๐ฅ๏ธ Frontend (when needed)
- React, TypeScript
- Dashboards, admin tools, API-driven interfaces
- Frontend integration with AI-powered backends and streaming responses
---
๐ Applied Mathematics & Computer Science Background
- Mathematical modeling of real-world systems
- Probability, statistics, numerical methods
- Optimization, algorithms, system-level thinking
This foundation helps design efficient, scalable AI systems (RAG, pipelines, search, data workflows).
---
๐ Certifications & Learning
- Generative AI for Software Developers Specialization
- LangChain for LLM Application Development
- Claude Code in Action (Anthropic)
- RAG / AI Systems / AWS certifications in progress
---
I focus on building systems that actually work in production โ reliable, scalable, and aligned with real business workflows.
If you need AI integrated into your backend, data, search, or automation systems, I can help.
Django
JavaScript
Python
Web Development
Data Scraping
Google Calendar API
React
API Development
Microsoft Outlook Development
RESTful API
SQL
Celery
HubSpot
Salesforce
Stripe API
Nikita F.
Yerevan, Armenia
$50/hr
5.0
32 jobs
I'm a Senior Python Developer & Machine Learning Engineer with over 15 years of experience building high-performance, scalable backend systems and deploying production-grade AI solutions.
I specialize in:
AI Agents using LangChain, OpenAI APIs, and custom tools
ML Systems for Computer Vision, OCR, and image enhancement (GANs, segmentation, stylization)
Backend Engineering with FastAPI, Django, PostgreSQL, and scalable cloud deployments (AWS, Docker, Kubernetes, Nvidia Triton)
From leading startup teams and migrating legacy systems to cloud-native infrastructure, to shipping ML services used in real-world products โ I deliver end-to-end solutions that are robust, maintainable, and scalable.
๐ง Technical Focus
Languages & Frameworks: Python, FastAPI, Django, Scrapy, Flask
AI/ML: PyTorch, TensorFlow, OpenCV, LangChain, OpenAI, Numpy, Scikit-learn
DevOps & Cloud: AWS, Docker, Ansible, Kubernetes, Redis, RabbitMQ, Nvidia Triton
Databases: PostgreSQL, MySQL, MongoDB, FAISS, Milvus
Frontend (as needed): React, HTMX, JS, jQuery
๐ผ What You Can Expect
โ Clean, production-grade code
โ Scalable architecture with CI/CD and cloud-native design
โ Deep understanding of both traditional backend and cutting-edge AI systems
โ Strong communication and fast iterations
Letโs build something powerful โ whether you're launching a new AI product or scaling an existing system.
Django
JavaScript
Python
PostgreSQL
SQL
MySQL
Data Analysis
Google Maps API
jQuery
Google App Engine
Armenak T.
Yerevan, Armenia
$20/hr
5.0
1 jobs
Armenak T.
Web Scraping & Automation Engineer | Django Developer | End-to-End Data Solutions
Overview
I'm a Python developer with 3+ years of experience building scalable web scraping systems, automation pipelines, and Django-based data platforms. My solutions transform complex data challenges into actionable insights while maintaining ethical compliance with platform rules and anti-bot protections.
Technical Expertise
Web Scraping:
Dynamic site handling (JavaScript-heavy, Cloudflare, reCAPTCHA)
Tools: Selenium, Playwright, BeautifulSoup, Scrapy, requests
Outputs: CSV/JSON/Excel, Google Sheets, REST APIs, Telegram alerts
Automation:
Browser bots with human-like behavior (randomized clicks/delays)
File/email workflows, form filling, and proxy rotation
Schedulers: cron, systemd, cloud deployment
Django Development:
Admin panels, REST APIs (DRF), authentication systems
Multi-language support, lightweight dashboards, marketing sites
Reliability & Deployment:
VPS deployment (Ubuntu), health checks, monitoring
Clean code with documentation and handover-ready environments
What Sets Me Apart
Responsible Scraping: Ethical handling of anti-bot systems (Cloudflare, hCaptcha)
End-to-End Solutions: From data extraction to Django dashboards and Telegram integrations
Proven Outcomes:
Processed 5kโ50k+ rows per run with validation
Deployed scrapers on VPS with automated schedules
Built Django mini-apps for data visualization and admin tools
Recent Projects
Goodreads Autobiography Scraper
Extracted titles, authors, genres, publication info, ratings, reviews, ISBN
The Knot Vendor Scraper
Collected company, phone, email, website, and social media data
TRAC Reports Scraper
Parsed immigration statistics from interactive charts (FY/Value)
My Process
Discovery: 1โ2 sample URLs + required fields
Proposal: Detailed plan, timeline, and fixed quote
Delivery: Sample demo โ full deployment + documentation
Support: Post-deployment assistance and monitoring
Why Work With Me?
Technical Precision: Clean, documented code with reproducible environments
Business Focus: Solutions tailored to your workflow (admin panels, real-time alerts)
Reliability: 24/7 monitoring, real-world testing, and proactive maintenance
Letโs discuss your data needs. Iโll provide a clear plan and sample within 24 hours.
JavaScript
Python
Web Development
Web Scraping
QA Automation
Selenium
Automation
Telegram
Python-Requests
QA Engineering
Full-Stack Development
Back-End Development
Davit M.
Yerevan, Armenia
$30/hr
5.0
13 jobs
Iโm a Python and JavaScript developer with strong experience building web applications, automation tools, and backend APIs. I work with Django, FastAPI, React, and Node.js to deliver fast, scalable solutions. My focus is writing clean, maintainable code and solving complex problems efficiently. Iโve completed projects involving scraping, integrations, and full-stack development. If you need a reliable developer who delivers on time, Iโm here to help.
CSS
JavaScript
Python
Web Development
MySQL
SQL
Data Extraction
Automation
React
Electron
Node.js
Redux
HTML5
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