AI AUTOMATION & FULL-STACK DEVELOPERHAFIZ USMAN H.

AI AUTOMATION & FULL-STACK DEVELOPER

What are you looking to build?

I build AI agents, workflow automations, and full-stack products for startups and small teams. Send me your broken workflow, half-finished app, or manual process, and I’ll reply with a clear plan and a fixed quote.

10+ years building web products
Let’s talkView case studies
Illustrative portrait placeholder for the portfolio owner
Available for freelance & contract projects

WHAT I DO

Services

Eight ways I help teams ship, across AI agents and LLM features, the automation that removes manual work, and the full-stack engineering that holds it all together.

01

AI Agents & Chatbots

AI voice, text, and email agents that respond to enquiries, qualify them, and hand off to your team with full context.

OpenAIClaudeLangChainLangGraphPythonFastAPINode.jsTypeScriptn8nWebhooks
02

LLM Integration

OpenAI, Claude, and other model APIs integrated into your product, with prompts tuned to stay consistent.

OpenAIClaudeLangChainVercel AI SDKLangfusePythonFastAPINode.jsTypeScriptREST
03

Full-Stack Development

Complete web products built end to end, from the interface through the API to the database underneath.

ReactNext.jsTypeScriptNode.jsNestJSExpressPythonPostgreSQLMongoDBDocker
04

RAG & Knowledge Search

Chat with your documents, data, and knowledge base, so answers come from what your business actually knows.

OpenAIClaudeLlamaIndexLangChainpgvectorPineconePythonFastAPIPostgreSQLMongoDB
05

Workflow Automation

n8n, Make, and Zapier workflows that replace the manual steps your team repeats every day.

n8nMakeZapierPipedreamTemporalWebhooksRESTNode.jsPythonCron
06

CRM Automation

HubSpot, GoHighLevel, and Salesforce kept in sync automatically, with messaging wired straight in.

HubSpotGoHighLevelSalesforceSlackWhatsAppTelegramn8nMakeZapierWebhooks
07

System Architecture Design

Scalable, reliable backend architecture designed up front, from data models and APIs to caching, queues, and deployment.

PostgreSQLRedisKafkaRabbitMQDockerKubernetesAWSNginxgRPCElasticsearch
08

APIs, Cloud & Deployment

REST and GraphQL integrations, webhooks, and third-party data syncs, deployed on AWS with Docker and CI/CD.

RESTGraphQLOpenAPIPostmanKubernetesGitHub ActionsWebhooksOAuthAWSDocker
85+
Projects delivered
7,000+
Hours delivered
100%
Upwork Job Success
Top Rated
Upwork status

LLM AGENTS · RAG · PROMPT ENGINEERING

AI Engineering

I build AI into real products, from agents that handle conversations and routine requests to model integrations that fit the stack you already have and retrieval over your own data so answers stay grounded.

AI Agent DevelopmentOpenAI APIClaudeLLM Prompt EngineeringRAGChatbot DevelopmentLangChainLangGraphVector DatabasesPineconepgvectorQdrantWeaviateHugging FaceEmbeddings
Discuss an AI build

What this covers

01

  • AI agents

    AI voice, text, and email agents that handle conversations, qualify enquiries, and hand off to your team with full context.

  • LLM integrations

    OpenAI, Claude, and other model APIs integrated into your product.

  • RAG

    Chat with your documents, data, and knowledge base.

  • Prompt engineering

    Prompts and guardrails tuned so output stays consistent and useful.

FULL-STACK ENGINEERING

Product Development

I build full-stack web products end to end, and finish the ones that stalled. React and Next.js on the front, Node.js, NestJS, or Python behind it, with a real database and a deployment that holds up.

ReactNext.jsTypeScriptNode.jsNestJSPostgreSQLStripeAWSPythonFastAPIMongoDBRedisSupabaseDockerGraphQLTailwind CSS
Start a product build

What this covers

02

  • Full-stack development

    React, Next.js, Node.js and NestJS, TypeScript, Python and FastAPI.

  • Fix and finish your app

    Built with Lovable, Cursor, Bolt, Replit, or an earlier freelancer? I fix bugs, add auth, payments, and a proper database.

  • MVP to production

    Take a prototype or MVP to a stable production product with real users.

  • Databases & cloud

    PostgreSQL, MongoDB, Redis, and Supabase, deployed with AWS, Docker, and CI/CD.

N8N · MAKE · ZAPIER

AI Automation

I automate manual work. Workflows that move data between your tools, follow up without being asked, and keep every system in sync, so nobody on your team is copying information by hand.

n8nMakeZapierCRM AutomationAPI IntegrationWebhooksHubSpotGoHighLevelSalesforceSlackWhatsAppTelegramAirtableGoogle SheetsPipedreamTemporal
Automate a workflow

What this covers

03

  • Workflow automation

    n8n, Make, and Zapier workflows that replace manual work.

  • CRM automation

    HubSpot, GoHighLevel, and Salesforce kept in sync automatically.

  • Messaging integrations

    Slack, WhatsApp, and Telegram connected into your workflows.

  • APIs, webhooks & syncs

    REST and GraphQL API integrations, webhooks, and third-party data syncs.

SELECTED WORK

Real projects. Thoughtful delivery.

A few examples of the problems I help solve and the products I help teams deliver.

All case studies
AI EngineeringEnterprise AI Platform · Node.js, Python & Go Monorepo

AIVI Voice AI & Communication Platform

An AI platform for lending and financial advisory teams that answers new leads in under three seconds, follows up across voice, SMS, and email, and transfers live calls to an advisor with the full customer record already on screen.

My roleAI Platform Engineering, System Architecture & Full-Stack Development
OutcomeLeads are qualified in under three seconds rather than hours. Contact rates rose 25–30%, and more than 50,000 previously dormant leads were re-engaged across enterprise lending and mortgage firms.
Next.jsNode.jsPythonGoTypeScriptMonorepoVoice AI & TelephonyLLM WorkflowsPayments & BillingUsage MeteringPostgreSQLAWS
View case study
Full-Stack + AI AutomationWeb Application · React, Express, PostgreSQL & AWS

Big Photo Hunt Community Platform

A community platform for photographers, built end to end. Members submit a photo each week, discover other creators by camera system and genre, and compete for a place in the Weekly Top 10.

My roleSolo full-stack engineer and architect
OutcomeThe platform is live and serving photographers internationally, with fast photo feeds and weekly competition rounds that open, close, and reset on their own.
React.jsExpress.jsNode.jsJavaScriptPostgreSQLAWSStripeSubscriptionsREST APIsCloud Storage
View case study
Full-Stack + AI AutomationEnterprise SaaS · React, Python & MongoDB

CorpIn AI Maturity & Governance Platform

An enterprise platform that scores how far along a company actually is with AI, benchmarks it against industry peers, and turns the gaps into a governance and compliance roadmap.

My roleFull-Stack Developer (Frontend Architecture, Backend APIs & System Integration)
OutcomeLeadership teams and enterprise clients, including Robatec, can now set an AI roadmap against a real baseline and track internal maturity against external benchmarks instead of estimating.
React.jsPythonMongoDBAI ChatbotNode.jsTypeScriptStripeREST APIsCloud Architecture
View case study
Hafiz Usman H.

Hafiz Usman H.

United KingdomAvailable now

100% Job SuccessTop Rated

Check MyUpworkProfile

My Upwork Activities

Proven performance, consistent delivery, and client satisfaction across long-term projects.

  • Trusted by clients worldwide
  • Long-term projects
  • Proven results

7,100+

Hours Tracked

Consistent long-term collaboration with global clients, delivering reliable and high-quality work across ongoing projects.

86

Jobs Successfully Completed

Delivered professional solutions across diverse client requirements with a strong focus on quality, deadlines, and results.

4.5

Client Rating

Rated across 72 client reviews, with a 100% Job Success score earned through clear communication and dependable delivery.

CLIENT FEEDBACK

What clients say

Verified reviews from Upwork, where I hold a 100% Job Success score across 46 client reviews.

Hafiz did a great job on our B2B Analytics platform. He handled both frontend and backend development professionally and delivered clean, reliable work.
Muhammad B.Full Stack Developer for B2B Analytics
Usman did an excellent job throughout our collaboration. He fulfilled all requirements on time, was highly ambitious, solution-oriented, and consistently brought in creative ideas…
Nicolas Q.Senior Full-Stack Engineer for B2B Dashboard Development
I hired Hafiz Usman for React.js / Next.js UI & Styling fixes, and I am very satisfied with his work.
Faisal N.React.js / Next.js UI & Styling Fixes
Usman successfully worked on Amazon Web Services EC2, S3, and security hardening tasks, delivering a secure and optimised infrastructure.
Majid M.AWS Expert Needed for EC2, S3, and Security Hardening
Great work fixing the JavaScript errors quickly and efficiently, everything is running smoothly now, thank you for the excellent job.
Muhammad B.JavaScript Error Fix Needed for Web Application
Very impressed with the quality of this POS application. The modern dashboard is clean, responsive, and easy to use. Communication was smooth throughout the project.
Upwork clientPOS app with modern dashboard
Good communication and made best efforts to complete tasks as assigned.
Wade H.OpenEMR/EHR System Administrator / Full Stack Developer

Skills & Approach to Work

Key Skills

AI Agent Developmentn8nOpenAI APILLM Prompt EngineeringAutomationAPI IntegrationReactNext.jsNode.jsTypeScriptPythonPostgreSQLFull-Stack DevelopmentStripeChatbot DevelopmentNestJSDockerCRM AutomationZapierAWS

My Approach

Understand

A short call or message first, to understand the real problem.

Scope & quote

A clear scope, timeline, and fixed price before I write any code.

Build

Clean, documented code with regular updates as it comes together.

Deliver & hand over

A tested deployment and a handover your next developer can maintain.

Let’s build something useful

I build AI agents, workflow automations, and full-stack products for startups and small teams. 85+ projects and 7,000+ hours delivered, Top Rated with a 100% Job Success score.

85+ projectsdelivered on Upwork
I’ll reply within24 hours.
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