Hire the Best Amazon Lex Developers
in India

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Mohit V.

Gurgaon, India

$15/hr
4.3
140 jobs

I build AI systems that work in production - not just in demos. With 10+ years in AI/ML and enterprise software, 3000+ hours on Upwork, 700+ solutions delivered, and 400+ clients across the globe, I've earned a simple reputation: if you need intelligent automation, a custom LLM application, or a scalable ML pipeline, I'll build it, ship it, and make sure it holds up. I work across the full AI stack: from raw data ingestion and model training to fine-tuning LLMs, deploying RAG architectures, and integrating everything into production-grade systems. Whether the project lives on AWS (Bedrock, SageMaker, Textract, Comprehend), Google Cloud (Vertex AI), or runs locally (Ollama, LLaMA, DeepSeek), I build for the environment that fits your business, not the one that's easiest for me. โž› ๐—ช๐—ต๐—ฎ๐˜ ๐—œ ๐—ฏ๐˜‚๐—ถ๐—น๐—ฑ ๐— ๐—Ÿ๐—ข๐—ฝ๐˜€ & ๐—ฃ๐—ฟ๐—ผ๐—ฑ๐˜‚๐—ฐ๐˜๐—ถ๐—ผ๐—ป ๐— ๐—Ÿ End-to-end ML pipelines with MLflow, SageMaker, and Azure ML. Model training, fine-tuning, versioning, and monitoring. TensorFlow, PyTorch, Keras, Scikit-learn, XGBoost. Deep learning, neural networks, and Diffusion Models. ๐—š๐—ฒ๐—ป๐—ฒ๐—ฟ๐—ฎ๐˜๐—ถ๐˜ƒ๐—ฒ ๐—”๐—œ & ๐—Ÿ๐—Ÿ๐—  ๐—”๐—ฝ๐—ฝ๐—น๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€ Custom GPTs, AI agents, and RAG pipelines using OpenAI, Claude, LLaMA, Mistral, and DeepSeek. LLM fine-tuning with LoRA/QLoRA. Prompt engineering (zero-shot, few-shot, chain-of-thought). Multi-agent systems with LangChain and LangGraph. Deployed on AWS Bedrock, Vertex AI, or self-hosted via Ollama/Supabase. ๐——๐—ฎ๐˜๐—ฎ & ๐—œ๐—ป๐˜๐—ฒ๐—น๐—น๐—ถ๐—ด๐—ฒ๐—ป๐—ฐ๐—ฒ Data mining, web scraping, and pipeline engineering with Pandas, NumPy, and Python. Business intelligence and analytics with Amazon QuickSight. NLP with Amazon Comprehend, BERT, SpaCy, Transformers - text classification, sentiment analysis, entity recognition, content generation. ๐—–๐—ผ๐—บ๐—ฝ๐˜‚๐˜๐—ฒ๐—ฟ ๐—ฉ๐—ถ๐˜€๐—ถ๐—ผ๐—ป & ๐——๐—ผ๐—ฐ๐˜‚๐—บ๐—ฒ๐—ป๐˜ ๐—œ๐—ป๐˜๐—ฒ๐—น๐—น๐—ถ๐—ด๐—ฒ๐—ป๐—ฐ๐—ฒ OCR and document processing with Amazon Textract, Azure Computer Vision, OpenCV, and Tesseract. Image recognition, face detection, and vision-based automation. Stable Diffusion and generative image workflows. ๐—–๐—ผ๐—ป๐˜ƒ๐—ฒ๐—ฟ๐˜€๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐—ฎ๐—น ๐—”๐—œ & ๐—ช๐—ผ๐—ฟ๐—ธ๐—ณ๐—น๐—ผ๐˜„ ๐—”๐˜‚๐˜๐—ผ๐—บ๐—ฎ๐˜๐—ถ๐—ผ๐—ป AI assistants and knowledge-base chatbots. Context-aware conversation systems integrated via API. GoHighLevel automation and CRM-connected AI workflows. Amazon Translate for multilingual deployments. ๐—ช๐—ต๐˜† ๐—ฐ๐—น๐—ถ๐—ฒ๐—ป๐˜๐˜€ ๐—ฐ๐—ผ๐—บ๐—ฒ ๐—ฏ๐—ฎ๐—ฐ๐—ธ Most AI projects fail at the handoff from prototype to production. I've spent a decade closing that gap, writing systems that are maintainable, monitored, and built to scale beyond the first deployment. - Production-first architecture from day one - Strong documentation and clean, handoff-ready code - Experience across AWS, Azure, GCP, and open-source stacks - Clear communication throughout, no black boxes - On-time delivery with post-launch accountability ๐—˜๐˜ƒ๐—ฒ๐—ฟ๐˜† ๐—ฝ๐—ฟ๐—ผ๐—ท๐—ฒ๐—ฐ๐˜ ๐—ถ๐—ป๐—ฐ๐—น๐˜‚๐—ฑ๐—ฒ๐˜€: - 1 month post-delivery support - 1 month warranty on all deliverables - Dedicated technical consultation If you're building an AI product, automating a complex workflow, or turning your data into something that actually makes decisions, let's talk. I'll tell you in the first conversation whether it's feasible, how long it takes, and what it'll cost.

  • Amazon Lex
  • OpenAI API
  • Machine Learning Model
  • Python
  • Artificial Intelligence
  • Prompt Engineering
  • ChatGPT
  • Large Language Model
  • Chatbot Development
  • Tesseract OCR
  • Stable Diffusion
  • Machine Learning
  • Generative AI
  • Computer Vision
  • Natural Language Processing
Kundan R.

Gurgaon, India

$15/hr
4.4
39 jobs

๐€๐ˆ ๐‚๐ก๐š๐ญ๐›๐จ๐ญ & ๐‚๐จ๐ง๐ฏ๐ž๐ซ๐ฌ๐š๐ญ๐ข๐จ๐ง๐š๐ฅ ๐€๐ˆ ๐„๐ฑ๐ฉ๐ž๐ซ๐ญ ๐ฐ๐ข๐ญ๐ก ๐Ÿ๐ŸŽ+ ๐ฒ๐ž๐š๐ซ๐ฌ ๐จ๐Ÿ ๐ž๐ฑ๐ฉ๐ž๐ซ๐ข๐ž๐ง๐œ๐ž ๐›๐ฎ๐ข๐ฅ๐๐ข๐ง๐  ๐œ๐ฎ๐ฌ๐ญ๐จ๐ฆ ๐œ๐ก๐š๐ญ๐›๐จ๐ญ๐ฌ, ๐€๐ˆ ๐š๐ฌ๐ฌ๐ข๐ฌ๐ญ๐š๐ง๐ญ๐ฌ, ๐š๐ง๐ ๐š๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง ๐ฌ๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ฌ ๐Ÿ๐จ๐ซ ๐ฌ๐ญ๐š๐ซ๐ญ๐ฎ๐ฉ๐ฌ, ๐’๐Œ๐๐ฌ, ๐š๐ง๐ ๐ž๐ง๐ญ๐ž๐ซ๐ฉ๐ซ๐ข๐ฌ๐ž๐ฌ. I help businesses design and deploy intelligent chatbots powered by OpenAI, GPT-4, Claude, LangChain, vector databases, and modern LLM frameworks. From customer support bots and AI sales assistants to internal knowledge assistants and workflow automation, I build scalable chatbot solutions that deliver real business impact. With over a decade of experience in software development, cloud architecture, and AI implementation, I have successfully delivered 30+ projects from concept and MVP to full-scale production deployment and ongoing support. ๐‚๐จ๐ซ๐ž ๐„๐ฑ๐ฉ๐ž๐ซ๐ญ๐ข๐ฌ๐ž ๐€๐ˆ ๐‚๐ก๐š๐ญ๐›๐จ๐ญ๐ฌ & ๐‚๐จ๐ง๐ฏ๐ž๐ซ๐ฌ๐š๐ญ๐ข๐จ๐ง๐š๐ฅ ๐€๐ˆ โ€ข Custom AI Chatbots โ€ข Customer Support Bots โ€ข AI Sales Assistants โ€ข Internal Knowledge Base Chatbots โ€ข Retrieval-Augmented Generation (RAG) Chatbots โ€ข Multi-Agent AI Systems โ€ข WhatsApp, Slack, and Website Chatbots โ€ข AI Workflow Automation ๐‹๐‹๐Œ๐ฌ & ๐†๐ž๐ง๐ž๐ซ๐š๐ญ๐ข๐ฏ๐ž ๐€๐ˆ โ€ข OpenAI GPT-4o / ChatGPT โ€ข Anthropic Claude โ€ข Meta Llama โ€ข Google Gemini โ€ข Mistral AI โ€ข Falcon LLMs ๐‘๐€๐† & ๐•๐ž๐œ๐ญ๐จ๐ซ ๐ƒ๐š๐ญ๐š๐›๐š๐ฌ๐ž๐ฌ โ€ข LangChain โ€ข LlamaIndex โ€ข Pinecone โ€ข Weaviate โ€ข Qdrant โ€ข FAISS โ€ข ChromaDB ๐‚๐ก๐š๐ญ๐›๐จ๐ญ ๐ˆ๐ง๐ญ๐ž๐ ๐ซ๐š๐ญ๐ข๐จ๐ง๐ฌ โ€ข Website Live Chat Widgets โ€ข WhatsApp Business API โ€ข Slack Bots โ€ข Microsoft Teams Bots โ€ข Telegram Bots โ€ข Discord Bots โ€ข CRM & ERP Integrations ๐€๐ฎ๐ญ๐จ๐ฆ๐š๐ญ๐ข๐จ๐ง & ๐๐š๐œ๐ค๐ž๐ง๐ ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ โ€ข Python โ€ข FastAPI โ€ข Node.js โ€ข REST APIs โ€ข WebSockets โ€ข AWS Lambda โ€ข Docker โ€ข Cloud Deployment ๐ƒ๐จ๐œ๐ฎ๐ฆ๐ž๐ง๐ญ ๐€๐ˆ & ๐Š๐ง๐จ๐ฐ๐ฅ๐ž๐๐ ๐ž ๐๐ซ๐จ๐œ๐ž๐ฌ๐ฌ๐ข๐ง๐  โ€ข PDF Chatbots โ€ข OCR & Document Parsing โ€ข Semantic Search โ€ข Knowledge Base Automation โ€ข Document Summarization ๐๐ซ๐จ๐ฏ๐ž๐ง ๐‘๐ž๐ฌ๐ฎ๐ฅ๐ญ๐ฌ โœ” Built AI customer support chatbots that reduced manual workload significantly โœ” Developed RAG-based knowledge assistants trained on PDFs, websites, and internal documents โœ” Created AI sales bots that qualify leads and schedule meetings automatically โœ” Integrated chatbots with CRMs, ERPs, and third-party APIs โœ” Delivered production-ready chatbot systems with analytics and monitoring ๐–๐ก๐ฒ ๐–๐จ๐ซ๐ค ๐–๐ข๐ญ๐ก ๐Œ๐ž? โ€ข 10+ years in software, cloud, and AI solution architecture โ€ข End-to-end chatbot development, deployment, and optimization โ€ข Strong focus on business outcomes and ROI โ€ข Scalable and secure architecture design โ€ข Clear communication and on-time delivery โ€ข Long-term support and maintenance ๐…๐ซ๐ž๐ž ๐’๐ž๐ซ๐ฏ๐ข๐œ๐ž๐ฌ โ€ข Free consultation to discuss your chatbot requirements โ€ข Free 1 month of post-launch support โ€ข Free 1 month warranty for bug fixes ๐‹๐ž๐ญโ€™๐ฌ ๐‚๐จ๐ง๐ง๐ž๐œ๐ญ Looking for a custom AI chatbot, RAG-based assistant, customer support bot, or conversational AI developer? Send me a message with your project details, and letโ€™s build an intelligent chatbot solution tailored to your business needs.

  • Amazon Lex
  • Python
  • Machine Learning
  • Chatbot
  • Computer Vision
  • Tesseract OCR
  • AIOps
  • Artificial Intelligence
  • ChatGPT
  • Prompt Engineering
  • Large Language Model
  • Generative AI
  • LangChain
  • OpenAI API
  • Stable Diffusion
Babu S.

Delhi Cantonment, India

$65/hr
5.0
93 jobs

TOP 1 PERCENT ON UPWORK WITH EXPERT VETTED, TOP RATED PLUS BADGE AND 100 PERCENT JOB SUCCESS RATE Phone System Expertise - Amazon Connect Customer , Claude Code, Agentic AI, Open AI, Salesforce, Service Cloud Voice,SCC AC, AWS Bedrock, AWS Lex , Amazon Connect Adapter for Salesforce, AWS lambda, Salesforce Voice Amazon Connect and Lex Architect and developer profile with extensive development experience. 130 plus AWS Connect contact centers created. Agentic AI using claude code, github copilot, open ai. Fully AI driven development and analysis of lambda and other relevant AWS services using claude agents AWS Bedrock implementation with connect. Customer authentication, intelligent call routing solutions developed using bedrock. Contact lens call summary call categorization and sentiment analysis. Live transcript Open AI Chatgpt integration with Lex. Generative AI projects like booking appointments via chatgpt bot etc. Salesforce Rank - Ranger Salesforce Certified Administrator Service cloud voice with Amazon connect set up for 40 plus customers from scratch. SCC AC implementation (new from Salesforce) Two way SMS, whatsapp implementation using SCC AC AWS Lex expert in creating chatbots and voicebots. Worked on 60 plus Lex bots creation from scratch. Skill based routing via connect proficiency Extensive experience in Amazon Connect, LEX, Lambda, Kendra, Cloudformation, Dynamo Db, SES, SNS, EC2, Secret Manager, Cloud watch, Event bridge, S3, IAM and other AWS services. Custom CCP implementation for Amazon connect react js app with ac dialer, live agent status, real time metrics, recent activities, call result and many more features. Custom CCP and complete outbound dialer solution using connect and related services lambda, dynamodb etc. 1. More than twelve years of IT experience. Amazon connects six plus years of extensive experience from the architect level to the development level. 2. Complete deployment knowledge for both username and SSO-based. More than 130 amazon connect deployments and created contact flows of a very complex nature. 3. Knowledge of all configurations like create user, queue, routing profile, quick connect, reports, hours of operation, phone numbers, etc. 4. Can design architect and create contact flows as per the customer requirement of any complexity involving amazon lex or lambda or some other stuff. 5. Have a working knowledge of creating amazon lex and integrating it with amazon connect. 6. Know using lambdas to call external applications and using external data in amazon connect. 7. Implemented amazon connect chat widget and chat functionality. Interactive chat for amazon connect 8. Experience as technical lead development for amazon connect. 9 . Knowledge of other AWS services like lambda, kinesis, amazon Polly, transcribe, lex, SES, SNS, pinpoint, single sign-on, etc. 10 . Implemented amazon connect custom CCP using amazon connect streams. 11. Integrated custom CCP in Salesforce. Amazon connects CTI adapter whole working experience 12. Implemented features like callback, recording, amazon lex, out-of-office hours, wait time, dynamic queue selection, voicemail, etc. 13. Fluent in English with good interpersonal communication skills. 14. Working experience on Salesforce Service Cloud Voice. 15. Interactive chat messages for amazon connect. 16. Async chat solution for amazon connect. 17. Generative AI integration with connect and lex using chatgpt open ai platform. 18. Service cloud voice deployments and consultant for more than 40 customers. 19. Contact lens for call analytics and sentiment scoring. 20. Two way sms and email integration. 21. Agent performance using evaluation forms. 22. Agent workforce agent ui event build and deployed custom views and logic. 23. Cases and customer profiles. 24. Third party app integration with agent workforce. 25. Outbound dialer complete solution using connect and custom ccp. Live demonstration available anytime. Open for any questions related to Amazon Connect, Lex, SCV and related AWS services. Excellent communication skills and proactive suggestions for product and process improvements. Customer satisfaction is the foremost goal. Believes in building long-term relationships.

  • Amazon Lex
  • Amazon Web Services
  • Node.js
  • ASP.NET MVC
  • AngularJS
  • Electron
  • Salesforce Lightning
  • Salesforce Service Cloud
  • Salesforce
  • AWS Application
Raghunathan S.

Puducherry, India

$30/hr
4.7
159 jobs

๐Ÿฅ‡ Top 3% AWS Expert | AWS Advanced Tier Partner | AI Specialist I help startups and enterprises deploy production-grade Generative AI and cloud solutions on AWS. 20+ years delivering AI architecture, LLM deployment, DevOps automation, and cost optimization for telecom, SaaS, fintech, and enterprise platforms. What I Do: ๐Ÿค– Generative AI & LLMs โ€“ Bedrock, SageMaker, RAG systems, LangChain, vector databases (Pinecone, Weaviate), fine-tuning, prompt engineering, AI agents โ˜๏ธ AWS Cloud Architecture โ€“ Landing Zones, secure 3-tier design, migrations, high availability, disaster recovery, serverless AI โš™๏ธ DevOps & Automation โ€“ Terraform, CloudFormation, CI/CD (GitHub Actions, CodePipeline), EKS, ECS, Docker, Kubernetes ๐Ÿ’ฐ AWS Cost Optimization โ€“ Right-sizing, reserved instances, FinOps, cloud billing analysis, AI inference optimization ๐Ÿ” Security & Compliance โ€“ IAM, VPC, WAF, SOC 2, HIPAA, compliance on AWS Core Technologies: Bedrock, SageMaker, Lambda, EC2, S3, RDS, DynamoDB, ECS, EKS, Terraform, Docker, Python, PostgreSQL, LangChain, OpenSearch Vector Proven Results: โœ” Deployed enterprise AI chatbot (Bedrock + RAG) reducing support response time by 60% โœ” Reduced AWS costs by 35% during migration + AI optimization โœ” Optimized ML inference pipelines saving $12K/month โœ” Migrated 20+ production workloads with zero downtime โœ” Built serverless AI pipelines using Lambda + Bedrock for real-time generation Why Hire Me: โญ Production AI + AWS expertise (Bedrock, SageMaker, LLMs, RAG) โญ Business-focused โ€“ align AI solutions with ROI โญ Security-first architecture by design โญ Cost-conscious optimization without sacrificing performance โญ Clear documentation, ongoing support Services: AI architecture audit, LLM deployment strategy, AWS cost review, cloud migration planning, MLOps pipeline design, serverless AI, infrastructure automation. Let's discuss your AI strategy or AWS architecture. Message me for a quick audit + recommendation call.

  • Amazon Web Services
  • Docker
  • DevOps
  • Terraform
  • Backup & Migration
  • Migration
  • Cloud Computing
  • AWS Lambda
  • AWS Fargate
  • AWS CloudFormation
  • AWS CloudFront
  • AWS Development
  • AWS Server Migration
  • Amazon S3
  • Amazon EC2
  • Amazon ECS
  • Amazon RDS
  • Amazon Bedrock
  • Amazon Aurora
  • Amazon Redshift
S M A.

Tiruppur, India

$40/hr
5.0
11 jobs

1. Highly organised worker 2. 100% Attention to detail 3. I can work on any time zones. 4. Excellent communication 5. Hands on experience in Instagram, Facebook, LinkedIn, Gmail 6. Quick learner 7. Experienced in Microsoft Office

  • Amazon Lex
  • Microsoft Word
  • Microsoft Excel
  • Virtual Assistance
  • Social Media Engagement
  • Instagram Marketing
  • LinkedIn Lead Generation
  • AWS Lambda
  • Amazon Web Services
  • Amazon S3
Rajrishi D.

Bengaluru, India

$60/hr
5.0
88 jobs

Want to transform your customer experience with intelligent automation instead of just routing calls? As an Expert-Vetted Freelancer (Top 1% on Upwork) and a 3X Certified AWS Professional, I specialize at the intersection of Cloud Telephony, Generative AI orchestration, and enterprise-grade microservices. With over 18 years of hands-on expertise in Cloud Architecture and Customer Experience (CX), I donโ€™t just deploy softwareโ€”I architect high-performance, end-to-end ecosystems that drive measurable operational ROI. Whether you need to modernize a legacy platform, build a zero-latency conversational Voice AI agent, or securely sync data across enterprise systems, I ensure your architecture is airtight, compliant, and lightning-fast. WHAT I BRING TO YOUR PROJECT โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” โ–ช Telephony Expertise (Twilio Flex & Amazon Connect): Seamless UI 1.x to 2.x migrations, custom plugin development, TaskRouter optimization, and real-time streaming (Kinesis/Media Streams). โ–ช Production-Ready GenAI: Implementation of Amazon Bedrock, ElevenLabs, and VAPI to build conversational agents, live smart-replies, and dynamic knowledge base lookups (RAG). โ–ช End-to-End Development: Full-stack capabilities utilizing a modern React + Tailwind CSS frontend backed by secure, robust AWS serverless microservices. โ–ช Enterprise Security: Proven experience handling sensitive workflows using mTLS handshakes, secure token exchange, and encrypted Secrets Management. CORE TECH STACK & SPECIALIZED SOLUTIONS โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” โ–ช Amazon Connect & AWS Ecosystem: Connect Streams API, Custom CCP, Lambda, API Gateway, DynamoDB, AppSync (Real-time Analytics), Bedrock, Textract, and Transcribe. โ–ช Twilio Ecosystem: Flex 1.x to 2.x Migrations, custom Plugin Development, TaskRouter, Programmable Voice/SMS/WhatsApp, and Media Streams for real-time audio routing. โ–ช UI/UX Frontend: Clean, modern, responsive dashboards built with React and Tailwind CSS for seamless agent and supervisor experiences. โ–ช Backend & API Frameworks: High-performance Node.js development using Fastify (optimized for low overhead and blazing-fast JSON serialization) and Express. โ–ช AI & NLP: VAPI, Retell.ai, Amazon Bedrock (Agents & Knowledge Bases), OpenAI, Google Dialogflow CX, Amazon Lex. CERTIFICATIONS โ”โ”โ”โ”โ”โ”โ”โ” 1. AWS Certified Solutions Architect โ€“ Associate 2. AWS Certified Developer โ€“ Associate 3. AWS Certified SysOps Administrator โ€“ Associate 4. Twilio Flex & API Accredited Specialist

  • Amazon Lex
  • Twilio
  • Twilio API
  • Amazon Web Services
  • Node.js
  • React
  • Fastify
  • AI Bot
  • Chatbot
  • Dialogflow
  • Amazon Comprehend
  • Amazon Transcribe
  • Amazon API Gateway
  • AWS Lambda
  • Amazon DynamoDB
  • Amazon Bedrock
  • OpenAI API
  • Claude
  • ElevenLabs
  • System Automation

How it works

Post a job for freePost a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

How do I hire a Amazon Lex Developer in India on Upwork?

You can hire a Amazon Lex Developer in India on Upwork in four simple steps:

  • Create a job post tailored to your Amazon Lex Developer project scope. We'll walk you through the process step by step.
  • Browse top Amazon Lex Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top Amazon Lex Developer profiles and interview.
  • Hire the right Amazon Lex Developer for your project from Upwork, the world's largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a Amazon Lex Developer?

Rates charged by Amazon Lex Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a Amazon Lex Developer in India on Upwork?

As the world's work marketplace, we connect highly-skilled freelance Amazon Lex Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Amazon Lex Developer team you need to succeed.

Can I hire a Amazon Lex Developer in India within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Amazon Lex Developer proposals within 24 hours of posting a job description.