Hire the Best Chatbot Developers

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Rating is 4.8 out of 5.
4.8/5
Based on 1,109 client reviews
Adedokun A.

Ibadan, Nigeria

$15/hr
5.0
8 jobs

Hi, I'm Adekola, a developer specializing in WhatsApp Business API integrations and messaging automation systems. I help businesses build reliable messaging infrastructure for customer notifications, automation workflows, chatbots, and high-volume messaging systems using the official WhatsApp Business API. My focus is building stable, scalable, and compliant messaging solutions that businesses can use for customer engagement, marketing, and operational automation. What I can help you build: โ€ข WhatsApp Business API setup and integration โ€ข Bulk messaging and notification systems โ€ข WhatsApp automation workflows โ€ข Chatbots for customer support and lead handling โ€ข CRM and backend integrations โ€ข Message template setup and approval โ€ข Webhook and delivery tracking systems โ€ข Scalable messaging infrastructure I work with developers, startups, and companies that want to automate communication and scale messaging operations using WhatsApp. If you're looking for someone experienced with WhatsApp Business API architecture, automation workflows, and messaging systems, feel free to reach out.

  • Chatbot Development
  • Chatbot
  • WhatsApp
  • Automation
  • Automated Workflow
  • API Integration
  • Marketing API Integration
  • Python
  • ChatGPT
  • Node.js
  • AI Chatbot
  • REST API
  • CRM Automation
  • PHP
  • Facebook Graph API
  • Facebook
  • Software Development
  • JavaScript
Viktor A.

Baia Mare, Romania

$35/hr
5.0
42 jobs

Most voice AI demos break on the first real call. Mine don't. As an experienced AI developer and AI Engineer, I build systems that handle 50+ calls/night at $0.10 each โ€” where customers genuinely can't tell it's not a person. ๐Ÿ“ฉ Send your project brief - I'll reply within 2 hours with a concrete action plan. ๐Ÿ† Why work with me? ๐Ÿฅ‡ Technical Reviewer for Manning Publications (Efficient AI in Practice & Enterprise RAG). ๐Ÿฅ‡ Winner of the Enterprise RAG Challenge. ๐Ÿฅ‡ Top-Rated AI Developer on Upwork with a focus on ROI. ๐Ÿฅ‡ Expert LLM Engineer specialising in hallucination-free RAG systems. Core Specialisations โ‡๏ธ AI Voice & Chatbot Development As a specialised AI developer, I build full voice pipelines: Deepgram/Whisper โ†’ GPT-4/Claude โ†’ ElevenLabs. Expert in chatbot development and conversational business logic for WhatsApp, Telegram, and Web. I work as a dedicated chatbot developer integrating systems with ManyChat, Botpress, and OpenAI API. Modern chatbot development setups to act as a 24/7 sales engine and support lead. โ‡๏ธ AI Agent Architecture & Autonomous Workflows I am an AI developer who excels in AI Agent architecture using LangGraph and CrewAI. Multi-AI Agent systems for lead generation, deal tracking, and complex CRM automation. Autonomous AI Agent workflows connected to Slack, Shopify, and enterprise backends. Every AI Agent I build is designed to scale and optimise business processes without increasing headcount. โš™๏ธ LLM Engineering & Advanced RAG As a senior LLM Engineer, I solve the "hallucination problem" for modern enterprises. Advanced LLM pipelines designed with a focus on Vector Databases (Pinecone, Weaviate, Milvus). Custom fine-tuning, prompt engineering, and production-ready LLM infrastructure. ๐Ÿ› ๏ธ FULL-STACK TECH STACK & DATA SCIENCE As an AI Developer: Python, FastAPI, Docker, AWS, Asyncio. As a Python Developer: LangChain, LlamaIndex, LangGraph, PyTorch. As a Web Developer: Frontend frameworks, responsive platforms, and API integration. As a Data Scientist: Advanced data processing, analytics pipelines, and model evaluation. โ‡๏ธ WHAT YOU GET WITH EVERY PROJECT When you hire me as your AI developer, you get production-ready, scalable, and cleanly documented code. As a professional Python Developer, I ensure your system is robust, while my background as a data scientist guarantees that your data is processed with maximum analytical precision. Whether it's complex chatbot development for support or an AI Agent workflow for outbound sales, I handle the full CI/CD deployment on AWS. As a skilled web developer and agentic ai developer, I ensure your user interfaces are as smooth as the underlying AI models. By combining the precision of a data analyst with the agility of a Python full stack developer, I create applications that are data-driven. Every Python full stack developer setup I deploy is fully integrated with analytical tools, meaning a data analyst or data scientist on your team can easily track performance. ๐ŸŒ EXPERTISE ACROSS THE spectrum Whether you need a high-performance chatbot developer to automate customer service or a senior LLM expert to architect complex RAG systems, I deliver code that scales: For Enterprises: I act as a Lead Python Developer, agentic AI developer, and machine learning consultant, building AI agent automation workflows. My skills as a data scientist extract valuable insights from your historical enterprise data via AI agent RAG pipelines. For Startups: As a python full stack developer and AI agent builder, I focus on rapid deployment of AI sales agent and AI voice chatbot solutions. I leverage modern frontend and backend practices as a capable web developer building AI agent SaaS products. For Deep Tech & Analytics: My work as a data scientist and machine learning specialist ensures your systems are backed by solid statistics. From predictive modelling as a data analyst to building generative AI agent and AI voice assistant systems, I cover all your data needs. From simple Python Developer scripting to AI agent creation, my goal is Enterprise AI solutions with clear ROI. If you need a Senior Python Developer and AI agent expert who understands business logic and architecture, let's connect. As a web developer and chatbot developer, I build digital ecosystems including WhatsApp AI chatbot and AI phone agent systems. My machine learning pipelines and python full stack developer practices ensure your software is future-proof. This blend of python full stack developer and AI agent N8N skillset makes me the ideal partner, combining a data analyst, machine learning engineer, and AI call agent creator. ๐Ÿ‘‰ Send me your project brief โ€” Iโ€™ll get back to you within 2 hours with a free AI visibility audit. Last update: 01.07.2026

  • Chatbot Development
  • Python
  • Artificial Intelligence
  • AI Agent Development
  • AI Development
  • AI App Development
  • Machine Learning
  • LLM Prompt Engineering
  • Deep Learning
  • Natural Language Processing
  • AI Chatbot
  • OpenAI API
  • Twilio
  • Data Science
  • LangChain
  • API Integration
  • AI Implementation
  • Claude
  • Twilio API
  • API
Syed A.

Lahore, Pakistan

$30/hr
4.8
52 jobs

๐ŸŒ๐Ÿš€ MVP / SAAS Specialist Expertise in | AI Developer | RAG | LLM | AI Integration | Python | OpenAI API Integration | Artificial intelligence | Machine Learning | Langchain | Django React JavaScript | FastAPI | AI agent | AI App Development | AI bot | AI chatbot | AI Agent | Restful API | PostgresSQL | Botpress | PostHog | MCP Server | Multi-Agents/Multiple Agents | Voice AI ๐Ÿ”‘ ๐ˆ ๐›๐ฎ๐ข๐ฅ๐ ๐š๐ง๐ ๐๐ž๐ฉ๐ฅ๐จ๐ฒ ๐œ๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐ฐ๐ž๐› ๐š๐ฉ๐ฉ๐ฅ๐ข๐œ๐š๐ญ๐ข๐จ๐ง๐ฌ, AI-Powered MVP, AI Healthcare Tools, AI Writing Tool, GPT Clone, Full Stack Application, Multi-Tenant ๐š๐ง๐ ๐ข๐ง๐ง๐จ๐ฏ๐š๐ญ๐ข๐ฏ๐ž ๐€๐ˆ ๐ฌ๐ฒ๐ฌ๐ญ๐ž๐ฆ๐ฌ ๐ญ๐ก๐š๐ญ ๐ฌ๐จ๐ฅ๐ฏ๐ž ๐œ๐จ๐ฆ๐ฉ๐ฅ๐ž๐ฑ ๐ฉ๐ซ๐จ๐›๐ฅ๐ž๐ฆ๐ฌ, ๐œ๐ซ๐ž๐š๐ญ๐ž ๐ง๐ž๐ฐ ๐ฏ๐š๐ฅ๐ฎ๐ž, ๐š๐ง๐ ๐ข๐ฆ๐ฉ๐ซ๐จ๐ฏ๐ž ๐ฎ๐ฌ๐ž๐ซ ๐ž๐ฑ๐ฉ๐ž๐ซ๐ข๐ž๐ง๐œ๐ž๐ฌ. ๐ŸŽ A 100% refund, if I'm unable to meet our agreed commitments. No questions asked! ๐Š๐ž๐ฒ ๐…๐š๐œ๐ญ๐ฌ: ๐Ÿง‘โ€๐Ÿ’ป 8+ years of experience as a Full Stack Developer and Artificial Intelligence Specialist ๐Ÿš€ 50+ market-winning projects launched โŒ› Around 600 hours on Upwork ๐ŸŽฏ Top-Rated on Upwork ๐ŸŒ‰๐ˆ'๐ฏ๐ž ๐ฌ๐จ๐ฅ๐ฏ๐ž๐ ๐ž๐ง๐ ๐ข๐ง๐ž๐ž๐ซ๐ข๐ง๐  ๐ฉ๐ซ๐จ๐›๐ฅ๐ž๐ฆ๐ฌ ๐Ÿ๐จ๐ซ ๐ญ๐จ๐ฉ ๐œ๐จ๐ฆ๐ฉ๐š๐ง๐ข๐ž๐ฌ ๐š๐ง๐ ๐ฌ๐ญ๐š๐ซ๐ญ๐ฎ๐ฉ๐ฌ ๐š๐ซ๐จ๐ฎ๐ง๐ ๐ญ๐ก๐ž ๐ ๐ฅ๐จ๐›๐ž โ˜‘๏ธ Under Armour โ˜‘๏ธ Snowflake โ˜‘๏ธ Estateza โ˜‘๏ธ SearchLook โ˜‘๏ธ Sparrowcharts ๐Ÿ’ก ๐–๐ก๐š๐ญ ๐œ๐š๐ง ๐ˆ ๐›๐ซ๐ข๐ง๐  ๐ญ๐จ ๐ฒ๐จ๐ฎ๐ซ ๐ญ๐š๐›๐ฅ๐ž? โ˜‘๏ธ Full Stack Development for robust and scalable web applications, including both front-end and back-end technologies โ˜‘๏ธ Custom Web and Application Development utilizing frameworks like Python, React, Django, React.js / Angular / Next.js / Nest / Nust / Golang and Node.js โ˜‘๏ธ Expertise in LLMs and ChatGPT integration to enhance application functionalities โ˜‘๏ธ Proficiency in RESTful APIs, GraphQL, and database management โ˜‘๏ธ Experience with cloud services like AWS, Azure, and Google Cloud for deployment and scaling โ˜‘๏ธ Strong problem-solving skills and ability to optimize user experiences and application performance ๐ŸŒŸ๐‡๐ž๐ซ๐ž'๐ฌ ๐ฐ๐ก๐š๐ญ ๐‚๐ฅ๐ข๐ž๐ง๐ญ๐ฌ ๐ก๐š๐ฏ๐ž ๐ญ๐จ ๐ฌ๐š๐ฒ ๐š๐›๐จ๐ฎ๐ญ ๐ฆ๐ž: ๐ŸŒŸ Ali Hamza is in the top tier of software developers and data engineers. He is far more than an implementer; he is a strong architect. During this project set, Usama worked on data from major US corporations ๐ŸŒŸ One of the best developers I have ever worked with. He is always on time and does exactly what he says he will do. I could not recommend him enough. ๐ŸŽฏ ๐ˆ ๐ฉ๐จ๐ฌ๐ฌ๐ž๐ฌ ๐ž๐ฑ๐ฉ๐ž๐ซ๐ญ๐ข๐ฌ๐ž ๐ข๐ง ๐ญ๐ก๐ž ๐Ÿ๐จ๐ฅ๐ฅ๐จ๐ฐ๐ข๐ง๐  ๐๐จ๐ฆ๐š๐ข๐ง๐ฌ โ˜‘๏ธ Full Stack Development: โ˜‘๏ธ Backend: โ˜‘๏ธ Python โ˜‘๏ธ Django โ˜‘๏ธ Flask โ˜‘๏ธ NodeJs, Express.js โ˜‘๏ธ Rest API, SOAP โ˜‘๏ธ Websocket โ˜‘๏ธ Third party integration โ˜‘๏ธ Frontend: โ˜‘๏ธ Html5, Css3, Bootstrap โ˜‘๏ธ Javascript โ˜‘๏ธ ReactJs, Angular โ˜‘๏ธ VueJs โ˜‘๏ธ NextJs, NuxtJs โ˜‘๏ธ Ajax, JSON, XML, XHTML, SVG, Canvas โ˜‘๏ธ API integration, OpenAI API โ˜‘๏ธ DevOps: โ˜‘๏ธ CI/CD Pipelines โ˜‘๏ธ IaC โ˜‘๏ธ Docker โ˜‘๏ธ Kubernetes / Terraform โ˜‘๏ธ Elasticsearch โ˜‘๏ธ Cloud Computing (Azure, AWS, Google Cloud) โ˜‘๏ธ Version Control (Git, GitHub) โ˜‘๏ธ Containerization + Orchestration (Docker, Kubernetes) โ˜‘๏ธ Spring Boot / Java, Microservices Architecture โ˜‘๏ธ Real-time / Streaming / Event-driven architectures โ˜‘๏ธ Session Recordings / Session Replays โ˜‘๏ธ GraphQL / gRPC โ˜‘๏ธ Kafka / Redpanda (real-time streaming) โ˜‘๏ธ Generative Artificial Intelligence (GenAI) โ˜‘๏ธ Large Language Models (LLMs) โ˜‘๏ธ Natural Language Processing (NLP) โ˜‘๏ธ ChatBots and Virtual Assistants โ˜‘๏ธ Text to Image Modelling โ˜‘๏ธ Vector Databases โ˜‘๏ธ Retrieval-Augmented Generation (RAG) โ˜‘๏ธ ChatGPT โ˜‘๏ธ OpenAI โ˜‘๏ธ AI/ML (Artificial Intelligence + Machine Learning) โ˜‘๏ธ Multimodal AI / NLP โ˜‘๏ธ Agentic AI / Autonomous Agents โ˜‘๏ธ โ€œVibe Codingโ€ / AI-first / prompt-driven dev workflows โ˜‘๏ธ Explainable AI / Ethical, Sustainable AI โ˜‘๏ธ Edge AI / On-device / Federated Learning โ˜‘๏ธ Web Scraping โ˜‘๏ธ Data Extraction โ˜‘๏ธ Data Scraping โ˜‘๏ธ Scrapy โ˜‘๏ธ Selenium โ˜‘๏ธ Beautiful Soup โ˜‘๏ธ Requests โ˜‘๏ธ Deployment and scheduling the scraping scripts on server โ˜‘๏ธ PostHog / Mixpanel / Amplitude / Segment (Twilio Segment) โ˜‘๏ธ OpenTelemetry (Datadog / Grafana / Sentry โ˜‘๏ธ LaunchDarkly / GrowthBook / VWO / Optimizely / Klaviyo โ˜‘๏ธ Airbyte / Fivetran / DBT โ˜‘๏ธ Auth0 / Clerk / SuperTokens / Google Auth โ˜‘๏ธ Stripe / Paddle โ˜‘๏ธ Plaid AI + Analytics Integrations โ˜‘๏ธ LangSmith / LangFuse โ€“ Observability and evaluation layer for LLM apps. โ˜‘๏ธ Weaviate / Pinecone / Qdrant โ€“ Vector DBs for AI features with analytics hooks. โ˜‘๏ธ Whylabs / Arize AI โ€“ ML observability & monitoring (similar to PostHog but for models). I am a Fullstack AI Developer - Python Django, React, Flask, API Integration I can help you to build: โšก Fast MVP Development (AI-Powered) โœ… โšก AI Powered SAAS Applications โœ… โšก AI Agent RAG Systems | AI Chatbots โœ… โšก Open AI API Integrations / LLM โœ… โšก Full stack Development (AI/ML, Django, React) โœ… โšก AI Workflows Automation โšก Voice AI tools Thank you for visiting my profile. Looking forward to working with you! I will ๐Ÿ’ฒREFUND ๐Ÿ’ฒ, if your expectation wont meet. For reference, you can see my work and testimonials below. Lets Chat!

  • Chatbot Development
  • Artificial Intelligence
  • Machine Learning
  • AI Agent Development
  • OpenAI API
  • AI Development
  • Django
  • Python
  • Retrieval Augmented Generation
  • API Integration
  • JavaScript
  • React
  • PostgreSQL
  • Large Language Model
  • LangChain
  • API
  • LLM Prompt Engineering
  • Web Application
  • AI App Development
  • FastAPI
Atul K.

Noida, India

$30/hr
4.9
178 jobs

๐—ง๐—ผ๐—ฝ ๐—ฅ๐—ฎ๐˜๐—ฒ๐—ฑ ๐—”๐—œ ๐—˜๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ & ๐—™๐˜‚๐—น๐—น-๐—ฆ๐˜๐—ฎ๐—ฐ๐—ธ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—ฒ๐—ฟ | 8+ ๐—ฌ๐—ฒ๐—ฎ๐—ฟ๐˜€ | ๐Ÿญ% ๐—ผ๐—ณ ๐—จ๐—ฝ๐˜„๐—ผ๐—ฟ๐—ธ | ๐Ÿญ๐Ÿฌ๐Ÿฌ% ๐—๐—ผ๐—ฏ ๐—ฆ๐˜‚๐—ฐ๐—ฐ๐—ฒ๐˜€๐˜€. โœ… $300K+ Total earnings โœ…8+ Years experience as Fullstack Developer โœ… 80+ Projects Completed. โœ…Top Rated Plus. โœ… 100% Job Success Rate. โœ… AWS certified โœ… Python certified โœ…50hrs/week available โœ… 4+ AI/ML Integrations ๐Ÿ”ด I am in the ๐—ง๐—ผ๐—ฝ ๐Ÿญ% overall on Upwork. ๐Ÿ”ด I am in the ๐—ง๐—ผ๐—ฝ ๐Ÿฐ% overall on Stack Overflow. ๐€๐ˆ ๐€๐ ๐ž๐ง๐ญ / ๐•๐จ๐ข๐œ๐ž ๐€๐ ๐ž๐ง๐ญ๐ฌ: ๐‚๐ซ๐ž๐ฐ๐€๐ˆ / ๐€๐ฎ๐ญ๐จ๐†๐ž๐ง / ๐€๐ฆ๐š๐ณ๐จ๐ง ๐๐จ๐ฅ๐ฅ๐ฒ / ๐ƒ๐ž๐ž๐ฉ๐ ๐ซ๐š๐ฆ / ๐‘๐š๐ฌ๐š ๐€๐ˆ / ๐‘๐ข๐ฏ๐ž๐ซ๐ฌ๐ข๐๐ž ๐’๐ƒ๐Š / ๐€๐ณ๐ฎ๐ซ๐ž ๐€๐ˆ ๐’๐ฉ๐ž๐ž๐œ๐ก/๐‹๐‹๐Œ ๐…๐ข๐ง๐ž๐ญ๐ฎ๐ง๐ข๐ง๐ : ๐”๐ฌ๐ข๐ง๐  ๐๐„๐…๐“ / ๐‹๐จ๐‘๐€ / ๐๐‹๐จ๐‘๐€ / ๐‘๐‹๐‡๐… / ๐ƒ๐๐Ž / ๐’๐…๐“ ๐ฐ๐ข๐ญ๐ก ๐”๐ง๐ฌ๐ฅ๐จ๐ญ๐ก / ๐€๐ฑ๐จ๐ฅ๐จ๐ญ๐ฅ / ๐‡๐ฎ๐ ๐ ๐ข๐ง๐ ๐…๐š๐œ๐ž ๐€๐ฎ๐ญ๐จ๐“๐ซ๐š๐ข๐ง / ๐’๐š๐ ๐ž๐Œ๐š๐ค๐ž๐ซ ๐“๐ซ๐š๐ข๐ง๐ข๐ง๐ /๐Ž๐ฉ๐ž๐ง-๐’๐จ๐ฎ๐ซ๐œ๐ž ๐‹๐‹๐Œ๐ฌ: ๐‹๐‹๐€๐Œ๐€ ๐Ÿ‘ / ๐Œ๐ข๐ฌ๐ญ๐ซ๐š๐ฅ ๐Ÿ•๐ / ๐Œ๐ข๐ฑ๐ญ๐ซ๐š๐ฅ ๐Ÿ–๐ฑ๐Ÿ•๐ / ๐…๐š๐ฅ๐œ๐จ๐ง / ๐†๐ž๐ฆ๐ฆ๐š / ๐๐ฅ๐จ๐จ๐ฆ / ๐Ž๐ซ๐œ๐š ๐Œ๐ข๐ง๐ข / ๐†๐ฎ๐š๐ง๐š๐œ๐จ/๐…๐š๐ฌ๐ญ ๐ˆ๐ง๐Ÿ๐ž๐ซ๐ž๐ง๐œ๐ž: ๐ฏ๐‹๐‹๐Œ / ๐“๐†๐ˆ / ๐“๐ž๐ง๐ฌ๐จ๐ซ๐‘๐“-๐‹๐‹๐Œ / ๐’๐Š๐๐ข๐ฅ๐จ๐ญ/๐๐ซ๐จ๐ฆ๐ฉ๐ญ ๐„๐ง๐ ๐ข๐ง๐ž๐ž๐ซ๐ข๐ง๐ : ๐Œ๐ฎ๐ฅ๐ญ๐ข-๐ญ๐ฎ๐ซ๐ง / ๐…๐ž๐ฐ-๐ฌ๐ก๐จ๐ญ / ๐™๐ž๐ซ๐จ-๐ฌ๐ก๐จ๐ญ / ๐‘๐€๐†-๐๐š๐ฌ๐ž๐ / ๐๐ซ๐จ๐ ๐ซ๐š๐ฆ๐ฆ๐š๐›๐ฅ๐ž ๐๐ข๐ฉ๐ž๐ฅ๐ข๐ง๐ž๐ฌ/๐๐ฎ๐š๐ง๐ญ๐ข๐ณ๐š๐ญ๐ข๐จ๐ง: ๐€๐–๐ / ๐†๐๐“๐ / ๐†๐†๐”๐… / ๐†๐†๐Œ๐‹ / ๐๐‹๐Ž๐‘๐€ / ๐๐“๐ / ๐ƒ๐/๐‘๐€๐† ๐’๐ฒ๐ฌ๐ญ๐ž๐ฆ๐ฌ & ๐ƒ๐š๐ญ๐š๐›๐š๐ฌ๐ž๐ฌ: ๐‹๐š๐ง๐ ๐‚๐ก๐š๐ข๐ง / ๐‹๐ฅ๐š๐ฆ๐š๐ˆ๐ง๐๐ž๐ฑ / ๐‚๐ก๐ซ๐จ๐ฆ๐š / ๐…๐€๐ˆ๐’๐’ / ๐๐ข๐ง๐ž๐œ๐จ๐ง๐ž / ๐๐๐ซ๐š๐ง๐ญ / ๐–๐ž๐š๐ฏ๐ข๐š๐ญ๐ž / ๐Œ๐ข๐ฅ๐ฏ๐ฎ๐ฌ Greetings! I am Atul Kumar, a seasoned developer with over 8+ years of experience in web application and software development. Working with LLMs for the past 8+ years and have good expertise in AI Agents development using langchain, LlamaIndex, and LLMs like Claude, GPT4o, Amazon Bedrock, Ollama ๐Ÿ”น AI Agents / Voice Agents: CrewAI, AutoGen, Amazon Polly, Deepgram, Rasa AI ๐Ÿ”น LLM Fine-tuning: PEFT, LoRA, QLoRA, RLHF, DPO with Unsloth, Axolotl, HuggingFace AutoTrain ๐Ÿ”น Open-Source LLMs: LLaMA 3, Mistral 7B, Mixtral 8ร—7B, Falcon, Gemma ๐Ÿ”น Inference Optimization: vLLM, TGI, TensorRT-LLM ๐Ÿ”น Prompt Engineering: Multi-turn, Few-shot, Zero-shot, RAG-based prompts ๐Ÿ”น Quantization: AWQ, GPTQ, GGUF, GGML ๐Ÿ”น RAG Systems: LangChain, LlamaIndex, ChromaDB, FAISS, Pinecone, Qdrant ๐Ÿ”น Data Pipeline: Synthetic dataset generation, LLM evaluation frameworks ๐Ÿ”น LLM Deployment: AWS Sagemaker, RunPod, GCP AI Platform, Vercel AI SDK ๐Ÿ–ฅ๏ธ ๐—•๐—ฎ๐—ฐ๐—ธ๐—ฒ๐—ป๐—ฑ ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐˜€: ๐Ÿ”น Proficient in Node.js, Express.js, Python, Django, Flask, AWS Lambda for backend API. ๐Ÿ”น Experienced with relational & NoSQL databases: MySQL, PostgreSQL, MongoDB, Firebase, Firestore. ๐Ÿ”น Skilled in Python FastAPI, REST API, GraphQL API development, and database schema design. ๐Ÿ”น Knowledgeable in Redis, Docker, Kubernetes, AWS EC2, S3, Nginx for scalable infrastructure. ๐Ÿ”น Experienced with Nest.js for enterprise-grade server-side applications. ๐Ÿ”น LangChain, LangServe, LangSmith, HuggingFace, Transformers for AI/LLM integrations. ๐Ÿ”น Vector Databases: Chroma, FAISS, Pinecone, Qdrant for RAG pipelines. ๐Ÿ”น Low-code AI tools: Flowise AI, LangFlow, StackAI for rapid prototyping. ๐Ÿ”น Familiar with Celery task queues, testing frameworks (Pytest, Unittest), and automation tools like Selenium. ๐ŸŒ ๐—™๐—ฟ๐—ผ๐—ป๐˜๐—ฒ๐—ป๐—ฑ ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐˜€: ๐Ÿ”น Proficient in TypeScript, Redux Toolkit, Tailwind CSS with Next.js for high-performance frontends. ๐Ÿ”น Skilled in building Progressive Web Apps (PWA) and Single Page Applications (SPA). ๐Ÿ”น Expert in Vue.js, Nuxt.js, React.js, Next.js, HTML5, CSS3, React Native for responsive and cross-platform UIs. ๐Ÿ› ๏ธ ๐—ง๐—ผ๐—ผ๐—น๐˜€ & ๐—ง๐—ฒ๐—ฐ๐—ต๐—ป๐—ผ๐—น๐—ผ๐—ด๐—ถ๐—ฒ๐˜€: ๐Ÿ”น Skilled in Python ML libraries: Scikit-learn, Numpy, Pandas, Matplotlib, Seaborn. ๐Ÿ”น Familiar with OpenAI APIs, Whisper, GPT models, ChatGPT integration, and AI chatbot deployment. ๐Ÿ”น Experienced with AWS (Lambda, S3, EC2, Sagemaker), Git/GitHub, and Linux environments (Ubuntu, CentOS). ๐ŸŒŸ ๐—”๐—ฑ๐˜ƒ๐—ฎ๐—ป๐—ฐ๐—ฒ๐—ฑ ๐—”๐—œ & ๐—Ÿ๐—Ÿ๐—  ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐˜€: ๐Ÿ”น AI Agents / Voice Assistants: CrewAI, AutoGen, Amazon Polly, Deepgram, Rasa AI. ๐Ÿ”น Open-Source LLMs: LLaMA 3, Mistral 7B, Mixtral 8ร—7B, Falcon, Gemma. ๐Ÿ”น Inference Optimization: vLLM, TGI, TensorRT-LLM for high-speed deployments. ๐Ÿ”น Prompt Engineering: Multi-turn, Few-shot, Zero-shot, RAG-based prompts. ๐Ÿ”น Quantization: AWQ, GPTQ, GGUF, GGML for efficient LLM deployment. ๐Ÿ”น LLM Fine-tuning: PEFT, LoRA, QLoRA, RLHF, DPO with Unsloth, Axolotl, H My expertise spans both frontend and backend technologies, as well as a variety of tools and additional skills that enable me to deliver comprehensive solutions. I am dedicated to providing high-quality, efficient solutions that cater to the unique needs of each project. My diverse skill set allows me to approach challenges from multiple angles, ensuring robust and innovative solutions. Warm regards, Atul Kumar

  • AI Bot
  • AI Chatbot
  • AI Development
  • AI Text-to-Speech
  • AI Text-to-Image
  • AI Speech-to-Text
  • AI App Development
  • AI Agent Development
  • AI Mobile App Development
  • AI Image Generation
  • AI Implementation
  • AI Platform
  • AI Model Integration
  • AI Security
  • AI Trading
Fraz B.

Islamabad, Pakistan

$15/hr
5.0
39 jobs

๐—ฌ๐—ผ๐˜‚ ๐—ป๐—ฒ๐—ฒ๐—ฑ ๐—ฎ๐—ป ๐—”๐—œ ๐˜€๐˜†๐˜€๐˜๐—ฒ๐—บ ๐˜†๐—ผ๐˜‚๐—ฟ ๐˜๐—ฒ๐—ฎ๐—บ ๐—ฐ๐—ฎ๐—ป ๐˜๐—ฟ๐˜‚๐˜€๐˜ ๐˜„๐—ถ๐˜๐—ต ๐—น๐—ถ๐˜ƒ๐—ฒ ๐—ฐ๐˜‚๐˜€๐˜๐—ผ๐—บ๐—ฒ๐—ฟ๐˜€ ๐˜๐—ผ๐—บ๐—ผ๐—ฟ๐—ฟ๐—ผ๐˜„ - ๐—ป๐—ผ๐˜ ๐—ฎ ๐—ฑ๐—ฒ๐—บ๐—ผ ๐˜๐—ต๐—ฎ๐˜ ๐—ฏ๐—ฟ๐—ฒ๐—ฎ๐—ธ๐˜€ ๐˜๐—ต๐—ฒ ๐—บ๐—ผ๐—บ๐—ฒ๐—ป๐˜ ๐—ฟ๐—ฒ๐—ฎ๐—น ๐˜‚๐˜€๐—ฒ๐—ฟ๐˜€ ๐˜๐—ผ๐˜‚๐—ฐ๐—ต ๐—ถ๐˜. I built my first Voice AI agent 24 months ago. It worked perfectly in testing. Then a caller with a heavy accent asked a question while their dog barked in the background, and the whole thing collapsed. That project taught me something most AI developers learn too late: the demo is 10% of the work. The other 90% is everything that can go wrong - bad audio, CRM timeouts, users who say "um" fourteen times, edge cases nobody warned you about. Now I only build AI that handles the chaos. ๐—ช๐—ต๐—ฎ๐˜ ๐—œ'๐˜ƒ๐—ฒ ๐—ฏ๐˜‚๐—ถ๐—น๐˜ ๐—ค๐—ฎ๐—น๐—ถ๐—ณ๐—”๐—œ takes 40+ real estate calls daily. Not test calls - actual leads, live conversations, 92% intent accuracy measured across thousands of interactions. Built on VAPI with ElevenLabs voice, GoHighLevel CRM sync, and Google Calendar booking. It qualifies buyers, handles objections, and hands off to human agents without dropping context. ๐—ฃ๐—ฎ๐—ฝ๐˜†๐—ฟ๐˜‚๐˜€ answers research questions across 15,000+ academic papers. Hierarchical chunking, hybrid search with pgvector, Cohere reranking, and cited answers. It says "I don't know" when retrieval confidence is low. Researchers trust it because it doesn't make things up. ๐—˜๐—ฎ๐˜€๐˜๐—น๐—ฎ๐˜„ searches 300,000+ Pakistani court judgments. Elasticsearch for filtering, semantic search for intent, FastAPI backend serving 200+ concurrent users. Lawyers use it every morning. ๐—”๐—œ ๐—™๐—ฟ๐—ฎ๐—ป๐—ธ generates legal documents with jurisdiction-aware retrieval. 700+ documents created with proper citations pulled from the right statutes. React frontend, Python backend, pgvector for legal precedent matching. ๐—ฆ๐˜๐—ฎ๐˜†๐—ฆ๐—พ๐˜‚๐—ถ๐—ฟ๐—ฒ handles hotel reception calls - booking inquiries, room availability, guest requests. Retell for voice, n8n workflows for automation, webhook integrations with property management systems. ๐—›๐—ผ๐˜„ ๐—œ ๐˜„๐—ผ๐—ฟ๐—ธ I take on Voice AI agents, RAG systems, and AI MVPs. I'm useful when you're past the "exploring AI" phase and need something deployed. Less useful if you're still figuring out whether AI makes sense - though I'm happy to tell you if it doesn't. Most of my projects are $2Kโ€“25K and take 2โ€“6 weeks. I don't disappear mid-project, I document everything, and I build with handoff in mind so you're not dependent on me forever. ๐—ง๐—ฒ๐—ฐ๐—ต ๐—œ ๐˜„๐—ผ๐—ฟ๐—ธ ๐˜„๐—ถ๐˜๐—ต ๐—ฉ๐—ผ๐—ถ๐—ฐ๐—ฒ ๐—”๐—œ: VAPI, Retell, Twilio, Bland, ElevenLabs, OpenAI Whisper, OpenAI TTS, Deepgram ๐—ฅ๐—”๐—š & ๐—Ÿ๐—Ÿ๐— ๐˜€: LangChain, LangGraph, LlamaIndex, OpenAI, Claude, Gemini, Cohere, pgvector, Qdrant, Pinecone, Elasticsearch ๐—•๐—ฎ๐—ฐ๐—ธ๐—ฒ๐—ป๐—ฑ: Python, FastAPI, Node.js, TypeScript, PostgreSQL, Redis, Supabase ๐—™๐—ฟ๐—ผ๐—ป๐˜๐—ฒ๐—ป๐—ฑ: React, Next.js, Tailwind CSS ๐—”๐˜‚๐˜๐—ผ๐—บ๐—ฎ๐˜๐—ถ๐—ผ๐—ป & ๐—œ๐—ป๐˜๐—ฒ๐—ด๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€: n8n, Make, Zapier, GoHighLevel, HubSpot, Google Calendar, Stripe, WhatsApp Business API ๐——๐—ฒ๐—ฝ๐—น๐—ผ๐˜†๐—บ๐—ฒ๐—ป๐˜: AWS, GCP, Vercel, Railway, Docker ๐—ช๐—ต๐—ฎ๐˜ ๐—ฐ๐—น๐—ถ๐—ฒ๐—ป๐˜๐˜€ ๐˜€๐—ฎ๐˜† "Fraz is excellent to work with. Fast, thorough, and quick to accept feedback. His team is great, and we have loved working with them to create multiple software solutions. Fantastic Upwork contractor." โ€” Matt Gray, Founder @ Hazard House If any of this sounds relevant, message me with what you're building. I respond within 30 minutes and I'll tell you honestly whether I can help.

  • Chatbot Development
  • Conversational AI
  • AI Chatbot
  • GPT Chatbot
  • AI Agent Development
  • AI Development
  • AI App Development
  • Full-Stack Development
  • LangChain
  • SaaS
  • SaaS Development
  • Natural Language Processing
  • Mobile App Development
  • Artificial Intelligence
  • Retrieval Augmented Generation
Talha H.

Lahore Cantt, Pakistan

$25/hr
4.7
70 jobs

I build AI agents, AI integrations, chatbots, automation systems, and AI SaaS platforms that run in production: LangChain, LangGraph, CrewAI, n8n workflows, RAG pipelines, and AI voice agents with Vapi and Retell AI. ๐—•๐—ฒ๐—ณ๐—ผ๐—ฟ๐—ฒ ๐˜„๐—ฟ๐—ถ๐˜๐—ถ๐—ป๐—ด ๐—ฎ๐—ป๐˜† ๐—ฐ๐—ผ๐—ฑ๐—ฒ, ๐—œ ๐—ฑ๐—ฒ๐˜€๐—ถ๐—ด๐—ป ๐—ฎ ๐—ฐ๐—ผ๐—บ๐—ฝ๐—น๐—ฒ๐˜๐—ฒ ๐—”๐—œ ๐—ฟ๐—ผ๐—ฎ๐—ฑ๐—บ๐—ฎ๐—ฝ ๐—ณ๐—ผ๐—ฟ ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ฏ๐˜‚๐˜€๐—ถ๐—ป๐—ฒ๐˜€๐˜€, ๐˜€๐—ผ ๐˜†๐—ผ๐˜‚ ๐—ธ๐—ป๐—ผ๐˜„ ๐—ฒ๐˜…๐—ฎ๐—ฐ๐˜๐—น๐˜† ๐˜„๐—ต๐—ฎ๐˜ ๐˜๐—ผ ๐—ฏ๐˜‚๐—ถ๐—น๐—ฑ, ๐˜„๐—ต๐—ฎ๐˜ ๐—ถ๐˜ ๐—ฐ๐—ผ๐˜€๐˜๐˜€, ๐—ฎ๐—ป๐—ฑ ๐˜„๐—ต๐—ฎ๐˜ ๐˜๐—ผ ๐˜€๐—ธ๐—ถ๐—ฝ. Most wasted AI budget comes from building the wrong thing first. The businesses I work with usually have the same problem: manual processes, disconnected tools, and leads or support tickets that sit untouched for hours. I replace that with systems that respond in seconds and run 24/7 without adding headcount. โžค ๐—ช๐—ต๐—ฎ๐˜ ๐—œ ๐—•๐˜‚๐—ถ๐—น๐—ฑ โœ” AI Agents and Agentic Workflows: autonomous and tool-using agents, multi-agent systems, function calling, MCP integrations (LangChain, LangGraph, CrewAI) โœ” AI Integration: connect OpenAI, Claude, and Gemini to your existing tools, CRM, and internal systems so AI works inside the workflows you already run โœ” AI Automation: n8n, Make, and Zapier workflows to automate lead qualification, CRM updates, email follow-up, reporting, and business processes โœ” AI Chatbot Development: context-aware support and sales chatbots for web, WhatsApp, and Slack, connected to your knowledge base, CRM, and calendar โœ” AI Voice Agents: inbound and outbound calling, AI receptionists, appointment booking, lead qualification (Vapi, Retell AI, ElevenLabs, Twilio, Deepgram) โœ” RAG Systems: knowledge bases grounded in your real documents with semantic search and vector databases (Pinecone, pgvector, Qdrant, ChromaDB) โœ” AI SaaS Platforms: full-stack development with multi-tenant architecture, auth, Stripe billing, dashboards, and deployment included โœ” Backend and API Integration: Python, FastAPI, Node.js, PostgreSQL, Supabase, REST APIs, webhooks โžค ๐—ฆ๐—ต๐—ถ๐—ฝ๐—ฝ๐—ฒ๐—ฑ ๐—ช๐—ผ๐—ฟ๐—ธ โœ” NFC-linked commerce platform for music artists: artist storefronts, product discovery, sales and tap analytics dashboards โœ” Event ticketing platform: event creation, checkout, and payment flows with fintech integrations โœ” Production data warehouse on Amazon Redshift for a Berlin climate-fintech company, delivered across structured milestones โœ” AI recruiting platform: trigger-based candidate sourcing with LLM scoring and automated write-back to Google Sheets โœ” Multiple production automation pipelines connecting CRMs, payment systems, and marketing tools Every system ships documented, deployed, and maintainable by your team. No black boxes, no vendor lock-in. โžค ๐—ง๐—ฒ๐—ฐ๐—ต ๐—ฆ๐˜๐—ฎ๐—ฐ๐—ธ โœ” AI and LLMs: OpenAI GPT-4o, Claude, Gemini, LangChain, LangGraph, CrewAI, LlamaIndex, MCP, prompt engineering, generative AI โœ” Voice: Vapi, Retell AI, ElevenLabs, Twilio, Deepgram, Whisper โœ” Automation: n8n, Make, Zapier โœ” Data: PostgreSQL, Supabase, Pinecone, pgvector, Redis โœ” Backend: Python, FastAPI, Node.js, REST APIs, webhooks, microservices โœ” Frontend and Cloud: React, Next.js, AWS, GCP, Docker, Vercel โœ” Integrations: HubSpot, GoHighLevel, Salesforce, Stripe, Google Calendar, WhatsApp Business API โžค ๐—›๐—ผ๐˜„ ๐—œ ๐—ช๐—ผ๐—ฟ๐—ธ Scoping call to understand your workflow and bottlenecks AI roadmap and architecture before any code is written Fast working prototype, then production hardening Documentation and handoff so your team owns the system Tell me the process that costs your team the most time. I will tell you exactly how I would automate it and what it would cost. โžค ๐—ž๐—ฒ๐˜†๐˜„๐—ผ๐—ฟ๐—ฑ๐˜€ ai agent development, ai agents, ai automation, ai integration, artificial intelligence, chatbot development, ai chatbot, chatgpt integration, generative ai, automation, workflow automation, n8n, make automation, zapier, agentic ai, ai voice agent, voice ai, conversational ai, prompt engineering, llm integration, rag, retrieval augmented generation, langchain, langgraph, crewai, multi-agent systems, mcp, openai api, gpt-4o, claude, gemini, vapi, retell ai, elevenlabs, twilio, deepgram, vector database, pinecone, python, fastapi, node.js, react, api integration, backend development, saas development, full stack development, business process automation, customer support automation, lead qualification, appointment booking

  • Chatbot Development
  • AI Bot
  • AI Chatbot
  • AI Platform
  • AI Development
  • AI Code Generator
  • AI Agent Development
  • AI Mobile App Development
  • AI App Development
  • AI Model Development
  • Machine Learning
  • Large Language Model
  • Prompt Engineering
  • LLM Prompt Engineering
  • Zapier
  • n8n
  • CRM Automation
  • Node.js
  • REST API
  • Firebase

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Chatbot developer hiring guide

Chatbot developers design and build AI-powered conversational tools that improve customer support, streamline lead generation, and boost user engagement. From rule-based FAQ bots to advanced generative AI assistants, these specialists combine technical expertise in natural language processing (NLP) and machine learning to create solutions that save time and increase efficiency. This guide covers what chatbot developers do, typical project costs, and how to evaluate and hire the right professional for your needs.

What does a chatbot developer do?

A chatbot developer designs and builds AI-driven chatbots that simulate human conversations through conversational AI and natural language understanding (NLU). These professionals use tools like ChatGPT, Botpress, and Dialogflow, or build custom frameworks using large language models (LLMs), to automate interactions across social media, websites, and messaging platforms like WhatsApp and Slack.

Chatbot developers create custom solutions tailored to business needs, such as customer support automation or appointment scheduling. They integrate chatbots into existing customer relationship management (CRM), application programming interface (API), or workflow systems to improve the customer experience. Beyond initial development, they fine-tune AI models, design conversation flows, and ensure seamless handoffs to human agents.

How to hire a chatbot developer on Upwork

Identifying the right chatbot developer involves more than evaluating coding skills; it requires finding a partner who understands your customer journey and can translate business goals into seamless conversational experiences. Follow these steps to find and hire a qualified chatbot developer for your project.

Step 1: Post a job

A well-crafted job post is your first opportunity to attract chatbot developers with the right technical skills and industry experience. The more specific you are about your project requirements, the more likely you are to receive proposals from qualified candidates.

  • Specify the type of chatbot you need, i.e. a customer support bot, AI assistant, or lead generation bot

  • Mention the tools, platforms, or APIs (e.g., Dialogflow, Azure, WhatsApp) in your current workflow

  • Clarify whether the project involves generative AI or no-code builders

To draft a tailored job post quickly, try the Job Post Generator powered by Umaโ„ข, Upwork's Mindful AI. Describe your needs in a few sentences, and Uma will craft a post in seconds. You can also review job description templates to see what information a post might include.

Step 2: Evaluate candidates

As you receive proposals, youโ€™ll want to take a systematic approach to reviewing them that allows you to identify the technical qualifications and past results of a candidate, as well as their ability to collaborate well with your team.

  • Have Uma give instant interviews and side-by-side comparisons

  • Use Upworkโ€™s filters to find candidates by rate, location, and experience

  • Read proposals to verify that candidates have understood your challenges and either have a plan to move you forward, or are asking informed questions

  • Check profiles for certifications, work history, and skills with systems and workflows you need

  • Review portfolios for case studies and to verify that candidates have successfully completed projects of similar size and scope to yours

Step 3: Interview your top choices

Quick video interviews allow you to ask any questions you have left for your top candidates, and to get a feel for what a collaboration with them might be like. 

  • Schedule and conduct interviews within Upwork messaging to get instant transcripts and summaries from Uma

  • Discuss problem-solving and how they handle ambiguous user inputs or data privacy requirements

  • Review workflows and talk about how to automate handoffs between bot and human agents

  • Evaluate their communication skills and how clearly they explain technical concepts

If youโ€™re unfamiliar with interviewing or working with freelancers, you can review common interview questions for freelancers. For more technically minded ideas, you can check out 20 AI developer interview questions and answers or machine learning engineer interview questions.

Step 4: Agree on scope and begin work

Before the person you choose can begin work, youโ€™ll need to have a clear contract in place. Contracts protect both parties and help collaborations be successful from beginning to end.

  • Use Upworkโ€™s tools and services for creating and managing contracts, and processing payments

  • Choose fixed-price contracts for projects with clear deliverables, such as developing a basic FAQ bot or rule-based flow

  • Set milestones to separate large projects into manageable deliverables, such as data mining and processing, bot training, and final delivery

  • Choose hourly contracts for projects that will be ongoing, such as regular updates or fine tuning 

Once the contract starts, be sure to have a quick onboarding and to give the expert everything they need to succeed, including the necessary access to project management tools.

How much does hiring a chatbot developer cost?

Chatbot developers on Upwork typically charge $30-$61 per hour, but the total cost of hiring a chatbot developer is determined by market demand and the scope and complexity of the project, as well as by the skill and experience of the developer. The following chart lists typical prices for projects commonly found through Upwork.

Small project

$1,000-$5,000/project

Entry- to mid-level
  • Basic FAQ bots
  • WhatsApp chatbots
  • Simple rule-based flows
  • Prototype development

Mid-sized project

$10,000-$40,000/project

Mid- to senior-level
  • NLP-enabled chatbots
  • CRM integrations
  • Slack/Teams integration
  • Conversation design

Large project

$40,000-$150,000+/project

Senior-level/specialist
  • Full conversational AI systems
  • LLM fine-tuning
  • Analytics dashboards
  • Multi-channel deployment

Frequently asked questions

Is hiring a chatbot developer worth it?

Yes, hiring a chatbot developer is worth it โ€” especially if you want to automate customer conversations and streamline lead generation. Chatbots can reduce customer support costs by around 30% while enhancing user satisfaction.

What skills should I look for in a chatbot developer?

Look for developers with strong natural language processing (NLP), Python, and API integration skills. Familiarity with frameworks like Dialogflow, Rasa, or Botpress is essential. The best developers also understand conversation design, prompt engineering, and database integration.

What are the main types of chatbots?

There are four main types of chatbots: rule-based bots, AI-driven chatbots, voice-enabled chatbots, and hybrid chatbots. Rule-based bots follow scripts, while AI-driven bots use machine learning and NLP to analyze context. Hybrid bots combine both, and voice chatbots integrate with assistants like Alexa.

What platforms can chatbot developers build for?

Developers can build for platforms like Slack, Microsoft Teams, Facebook Messenger, Telegram, WhatsApp, and mobile apps. Many also integrate chatbots directly into websites or CRMs for centralized communication.

How long does a typical chatbot development project take?

The timeline to build a chatbot varies by complexity. A simple rule-based FAQ bot might take 2-4 weeks, while an AI-powered bot with CRM integration typically requires 6-12 weeks. Enterprise-grade chatbots with advanced NLP and custom training can take 3-6 months.

What industries commonly hire chatbot developers?

Chatbot developers are in high demand across e-commerce, healthcare, financial services, and customer service sectors. E-commerce uses them for product recommendations, healthcare for appointment scheduling, and finance for fraud alerts and account inquiries.

What should I include in my chatbot developer job description?

In the job description, outline your chatbot's purpose, target users, and required integrations. Include preferred frameworks, API connections, and AI models (like ChatGPT). Be upfront about project scope and post-launch support needs.

Can I use AI tools instead of hiring a chatbot developer?

AI tools can build basic bots, but custom projects need human expertise. Developers handle back-end setup, workflow automation, and fine-tuning AI models to match specific business goals, which automated platforms often cannot replicate.