Available for Hire — Remote (JST / Japan Timezone)

AI Full-Stack Engineer
for Hire

Generative AI & LLMs  ·  RAG Pipelines  ·  Agentic Workflows  ·  FastAPI

I'm Ramesh Kumar Das — an AI-Integrated Full-Stack Engineer with 6.5+ years building production AI platforms, intelligent backend systems, and scalable web applications. I specialize in Generative AI, LLMs, RAG pipelines, and Agentic AI workflows, building the infrastructure that powers next-generation AI products. Currently leading AI development at Kliky AI (Kuwait), shipping WinstaAI — a production agentic AI SaaS with multi-model LLM orchestration, text-to-image, video AI, and autonomous workflows. If your business needs a developer who truly understands AI — from prompt engineering to production deployment — I'm ready.

AI Full-Stack Engineer Generative AI Developer LLM Engineer RAG Pipelines Agentic AI Sapporo / Japan Focus 6.5+ Years
Ramesh Kumar Das — AI Full-Stack Engineer available for hire

6.5+
Years Experience
10+
AI Systems Built
5+
LLM Integrations
100%
Remote Ready

AI & Full-Stack Tech Stack

From LLM orchestration to production deployment — the complete AI engineering toolkit

Agentic AI & Generative AI
LangChainLlamaIndexOpenAI GPT APIsDeepSeekHugging FaceOllamaRAG PipelinesVector EmbeddingsSemantic SearchAI AgentsAgentic WorkflowsTool CallingPrompt EngineeringMulti-Model Systems
AI Media & Processing
Text-to-ImageComfyUIReplicateFAL.aiRunPod (GPU)Speech-to-Text / TTSOCRFace SwapVideo AI
Backend & APIs
FastAPIDjangoNode.jsPython3REST APIsWebSocketsCeleryAsync ProgrammingMicroservices
Frontend
React.jsNext.jsTypeScriptTailwind CSS
Databases & Vector Stores
PostgreSQLMongoDBRedisPineconeWeaviateSupabase
Cloud & DevOps
DockerAWS EC2/S3GPU ServersNginxGitHub ActionsCI/CD

AI Engineering Services

What I build for businesses integrating AI into their products and workflows

🤖 Generative AI Platform Development

End-to-end AI SaaS platforms with LLM integration, credit/billing systems, admin dashboards, user analytics, and multi-model AI orchestration. Built with FastAPI microservices and Next.js frontends.

🔍 RAG Pipeline Architecture

Retrieval-Augmented Generation systems using LangChain, LlamaIndex, vector databases (Pinecone, Weaviate), and semantic search — enabling your AI to answer questions from your private data accurately.

🧠 Agentic AI Workflows

Autonomous AI agent systems that execute tasks, call APIs, make decisions, and orchestrate multi-step workflows without human intervention. Built with LangChain agents, tool calling, and custom orchestration.

🎨 AI Media Generation Systems

Text-to-image pipelines (ComfyUI, Replicate, FAL.ai), face swap, video/audio AI processing, OCR, and speech-to-text/TTS systems. GPU inference on RunPod and cloud platforms.

🌐 AI-Powered SaaS Backends

Scalable backend APIs for AI products with async task queues (Celery), WebSocket streams for real-time AI output, usage tracking, rate limiting, and GPU resource management.

🔗 AI API Integration

Integrating OpenAI, DeepSeek, Anthropic, Hugging Face, and other AI APIs into your existing applications. Custom prompt engineering, response validation, cost optimization, and fallback systems.


Work Experience

6.5+ years building AI-integrated production systems

Lead AI Full-Stack Developer
Kliky AI
2024 – Present

WinstaAI — Agentic AI SaaS Platform (Kuwait)

Leading end-to-end AI platform development combining Generative AI, agentic workflows, and multi-model LLM orchestration at production scale.

  • Built agentic AI pipelines for autonomous task execution, tool-calling, and decision-based orchestration using LangChain and custom frameworks
  • Integrated text-to-image (ComfyUI, Replicate), face swap, OCR, video/audio AI, and multi-model LLM routing (OpenAI, DeepSeek, Ollama)
  • Developed intelligent admin dashboard for AI service management, credit systems, usage analytics, and billing
  • Integrated GPU inference platforms (RunPod, FAL.ai) with dynamic resource allocation and cost optimization
Full-Stack Developer
AJATH INFO TECH PVT. LTD.
2021 – 2023

Dibbly — Multilingual AI Video Translation  |  Paperport — AI Content Generator

  • Built multilingual AI video translation using speech-to-text, text-to-speech, DeepL, and real-time transcription workflows
  • Integrated LLM-powered content generation for structured presentations and roadmaps from unstructured text
  • Implemented secure AI API communication, session handling, CSRF protection, and JWT auth
Full-Stack Developer
SARAJ SYSTEM PVT. LTD.
2019 – 2021

Khantailor & PathHub

  • Developed and optimized full-stack web platforms using React.js, Node.js, and Django
  • Built real-time features with WebSockets and Redis improving synchronization by 30%
  • Reduced API latency by 20–30% through backend optimization and caching

Frequently Asked Questions

Common questions from HR managers and business owners looking to hire AI engineers

What is the difference between Generative AI and Agentic AI development?
Generative AI development focuses on integrating models like GPT-4 or Stable Diffusion to generate text, images, or audio. Agentic AI development goes further — building autonomous systems that use AI to make decisions, call external APIs, execute multi-step tasks, and operate independently. I specialize in both.
Can you integrate AI into my existing software product?
Yes. I can add AI capabilities to any existing web application — whether it's adding a chatbot, building a RAG system for document Q&A, generating content automatically, or creating an AI-powered recommendation engine. I will assess your current stack and integrate AI cleanly without disrupting your existing system.
What LLMs do you have experience with?
I have production experience with OpenAI GPT-4/GPT-4o, DeepSeek, Anthropic Claude, Hugging Face models, Ollama (local inference), and various specialized models through Replicate. I design multi-model routing systems that select the best model for each task while optimizing cost.
How do you handle AI cost and rate limit management?
I implement token budgeting, response caching, model fallback chains, async queuing with Celery, and usage tracking per user/organization. These strategies reduce AI API costs significantly while maintaining performance and reliability in production.
Are you available for AI consulting and architecture review?
Yes. I offer AI architecture consulting for businesses planning their AI strategy — from selecting the right models and tools to designing scalable RAG systems and agentic workflows. Reach me on WhatsApp at +977-9700864900.

Let's Build Your AI Product Together

Open to AI engineering roles, AI product development contracts, and consulting — remote worldwide

💼 Also explore:  Hire me as Full-Stack Developer →  |  Hire me as Backend Engineer →  |  View full portfolio →
🔥 50% Exclusive Discount

Enterprise AI Engineering. Startup Pricing.

Get production-grade LLM, RAG, and agentic AI systems at unmatched value. Limited time direct-hire pricing.

Hourly Consulting
Japanese Agency: $60 - $80
$29-50% Off
Pay-as-you-go · Billed weekly

  • LLM integration & RAG pipeline setup
  • Architecture & code review
  • Prompt engineering & optimization
  • Min. 4 hours per session
  • Async or video call support
🚀 Book Hourly Session
Fixed-Price MVP
Japanese Agency: $3,000+
From $1,499Fixed
Milestone-based · Clear deliverables

  • Complete AI product MVP (4–6 weeks)
  • Custom RAG chatbot deployment
  • Secure LLM API integrations
  • Clear scope defined upfront
  • Invoice at completed milestones
🚀 Get Custom Quote

💡 Exclusive Direct Offer: Skip the agency fees. By hiring me directly, you get top-tier US/EU engineering quality at a fraction of the market cost. Prices reflect my current 50% discount for direct client engagements.

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