You will get React JS | React Developer | Front End Developer | JavaScript | Full stack
Project details
Custom React and Angular web app development
✔️ Fully responsive, mobile-friendly design
✔️ Integration with APIs and third-party services
✔️ Dynamic user interfaces with seamless interactions
✔️ Clean, maintainable code for easy future updates
✔️ Fully responsive, mobile-friendly design
✔️ Integration with APIs and third-party services
✔️ Dynamic user interfaces with seamless interactions
✔️ Clean, maintainable code for easy future updates
Programming Languages
JavaScript, Python, TypeScriptWhat's included
| Service Tiers |
Starter
$50
|
Standard
$51
|
Advanced
$52
|
|---|---|---|---|
| Delivery Time | 1 day | 1 day | 1 day |
Number of Revisions | 1 | 1 | 1 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | |
Content Upload | - | - | |
Responsive Design | - | - | |
Source Code | - | - |
29 reviews
(26)
(3)
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This project doesn't have any reviews.
RL
Ralf L.
May 12, 2025
(Angular) Front-End Developer
AG
Allison G.
Jan 2, 2025
Senior Frontend Development Typescript and Automated testing
DG
Diana G.
Jul 1, 2024
Join an Elite Team: Front End Development in Angular, Java / Software Sprinter & Extreme Coder
Oleksii is a highly competent and knowledgeable Developer. He delivered quality code for the parts of the project he assisted us with, significantly contributing to our success.
RL
Ralf L.
Apr 15, 2024
(Angular) Front-End Developer
NO
Neal O.
Feb 2, 2024
Medior Front End Developer
The job description probably didn't fit very well with Oleksii. It was a mismatch in technical skills vs what we are looking for.
About Oleksii
Full Stack Developer React Next.js Node.js Laravel | AI SaaS Developer
100%
Job Success
Vienna, Austria - 8:20 am local time
With 40+ years of combined engineering experience and 870+ completed projects,
I work as a Machine Learning Engineer, AI Engineer, MLOps Engineer, and Python Developer - delivering production-grade AI systems using Python, LangChain, LangGraph, RAG pipelines, LLM integrations, and full MLOps / DevOps infrastructure.
I operate with a team of 90+ engineers across AI, Backend, and DevOps, serving US and European clients from prototype to production.
Across 870+ projects and 40+ years of combined stack experience, our team has scaled AI systems to handle millions of requests daily - from RAG pipelines that replaced 3 full-time support agents, to LLM workflows that cut manual operations by 70%, to MLOps infrastructure that grew deployments from 1 to 120 per month.
With 870+ projects behind us, I deliver end-to-end LLM integration using Python, GPT-4, GPT-5, Claude, LLaMA, and Mistral - including prompt engineering, context engineering, and embedding pipelines. Using LangChain and LangGraph, I build multi-agent AI systems where each agent handles retrieval, reasoning, and execution autonomously. Across 40+ years of combined AI development experience, we've shipped agent orchestration systems for fintech, healthcare, SaaS, and enterprise clients.
I build RAG pipelines using Python, Weaviate, Chroma, semantic search, and knowledge retrieval systems integrated into production workflows - connected to PostgreSQL, MongoDB, CRMs, and internal knowledge bases. With 870+ completed projects, including dozens of RAG systems, one pipeline alone reduced support workload equivalent to 3 full-time employees, cutting response time from hours to seconds.
I'M Full-Stack Developer with 9 years experience and 12 completed projects, specializing in scalable event platforms.
7 years full-stack experience, 18 projects delivered expert in Django + React SaaS solutions.
5 years building ticketing systems with 14 completed projects, experienced in payment integration and real-time inventory.
10 years full-stack development, 16 delivered projects ready for long-term SaaS partnerships and rapid MVPs.
$4.6M+ client impact and $1.3M+ direct revenue across products developed with React, Next.js, and Node.js.
24,000+ active users across Web and Mobile platforms where React frontends and Node.js services increased user engagement by 21–30%.
13,500+ users across FinTech and payment products where Next.js improvements reduced reconciliation time by 43%.
2,900+ completed orders and 600+ registered customers on an eCommerce and CRM platform delivered with Next.js and Node.js.
92% faster order processing and 82% less manual work after workflow automation and backend optimization.
2,100+ catalog items, 5 user roles, and 3x higher operational capacity on SaaS
Across 870+ completed projects with our 90+ engineer team, we've built and deployed Python-based LLM and RAG systems for Fintech (fraud detection, automated KYC, financial intelligence), Healthcare (HIPAA-compliant AI pipelines, patient data retrieval, clinical NLP), SaaS (AI copilots, agent workflows, automated onboarding), and Enterprise (internal knowledge bases, document intelligence, multi-agent orchestration with LangGraph and n8n). With 40+ years of cross-industry AI experience, we align every Python, FastAPI, Kafka, and Kubernetes decision to your business outcome not just the tech spec.
🔥 85+ completed projects (40+ SaaS & MVP platforms) delivered as a Full Stack Developer & React Developer
💰 Startup MVP platforms generated $500K+ revenue in their first 6 months
👥 SaaS products supporting 10K–50K active users built by an expert Full Stack Developer
📈 One platform grew from 2K to 7K users through continuous product updates by a Web Developer
⚡ Backend systems processing 300K–500K A
Send me a message with your idea or current setup whether it's a RAG pipeline, an LLM agent built with LangChain or LangGraph, a Python backend on FastAPI, or a full MLOps infrastructure on AWS, GCP, or Azure with Kubernetes and Docker. With 870+ projects completed and 40+ years of combined experience across Python, LLM, RAG, NLP, Kafka, Postgres, and n8n we move fast, take full ownership, and ship AI systems that work in production from day one.
👋 Whether as Python Full Stack Developer to ship a production-grade web app, a Python Developer AWS to deploy scalable microservices, a Python Full Stack Developer Flask expert to build modern backend-driven applications, or a Python AI Developer to wire up intelligent automations I deliver clean, reliable, maintainable solutions that solve real problems. If you're also searching for a solid web developer, full-stack developer I bring the same professional skills
📩 Send me a message with your current setup - I'll tell you what's missing, what can be improved, and whether your AI system is ready for production.
Steps for completing your project
After purchasing the project, send requirements so Oleksii can start the project.
Delivery time starts when Oleksii receives requirements from you.
Oleksii works on your project following the steps below.
Revisions may occur after the delivery date.
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