
Haris Mumtaz
Verified Expert in Engineering
Full-stack Developer
Karachi, Sindh, Pakistan
Toptal member since March 9, 2026
Haris is a technology evangelist and senior technical lead with 11+ years of experience in driving innovation in AI, blockchain, and enterprise systems. He excels in leading cross-functional teams, aligning technology with business goals, and delivering high-impact solutions. Haris is recognized for fostering collaboration, mentoring talent, and transforming complex challenges into scalable outcomes, making him a vital asset in today's rapidly evolving tech landscape.
Portfolio
Experience
- MySQL - 10 years
- JavaScript - 10 years
- Node.js - 10 years
- React - 8 years
- Python 3 - 7 years
- NestJS - 7 years
- LangGraph - 2 years
- RAG Architecture - 2 years
Preferred Environment
MacOS, Linux, Visual Studio Code (VS Code), Cursor AI, AWS IoT, Azure, Python 3, JavaScript
The most amazing...
...project I've done was architecting AI systems that automated knowledge sharing, reducing internal support wait time by over 70%.
Work Experience
Founder & CTO
Guftara AI
- Developed a Sovereign AI Platform for conversational voice agents, training a base model on multiple languages targeting English, Urdu, Arabic, and more.
- Built a concrete RAG architecture to reduce hallucination and completely open source, preserving data privacy and confidentiality of sensitive domains.
- Assembled a team of 2 engineers, including myself, to plan and architect the AI solution, which was completely built on open source and custom models.
- Developed SOPs and AI-assisted development rules, guidelines, and security layers to ensure developers build the product within defined boundaries.
- Trained a 0.9B open source model into Urdu accent on podcast voices and support agent.
Founder
Sahinite
- Built and delivered scalable AI-powered platforms across healthcare, trade, and media, driving measurable efficiency gains and real business outcomes for clients globally.
- Engineered AI automation workflows using OpenAI and n8n, reducing manual video production from 3 days to under 1 hour and enabling autonomous channel growth with minimal human input.
- Delivered cloud-optimized platforms on AWS, cutting infrastructure costs by 35%, boosting performance by 40%, and scaling a trade platform to 1,000+ active customers.
- Developed an AI diagnostic lab platform improving multi-branch efficiency by 60%, and a React Native app reducing development costs by 40% through a unified codebase.
- Selected from thousands globally for the UN ESCAP hackathon, and currently building an AI agent that retrieves and cites Asian regulatory data with 90% source accuracy.
Senior Technical Lead
Nisum Technologies
- Led development of a GenAI pre-sales automation agent that reduced proposal preparation time from days to hours, accelerating client engagement cycles and improving delivery efficiency across teams.
- Optimized architecture for a healthtech clinical trials platform, reducing API response time by 30% and improving deployment speed by 40% through CI/CD automation and scalable AWS microservices.
- Built an AI knowledgebase chatbot using LLMs and vector embeddings that reduced internal support wait times by over 70%, enabling continuous team productivity and faster decision-making.
- Engineered a parallel-processing content migration tool that reduced enterprise ETL processing time by 10x, enabling large-scale data migration with improved throughput and operational efficiency.
- Architected scalable microservices and cloud infrastructure supporting enterprise applications on AWS, enabling high availability and handling thousands of daily requests with improved system reliability.
Fractional CTO
brandbugs
- Architected end-to-end software platforms for Saudi Arabia–based enterprise clients, delivering scalable cloud solutions that supported multiple production deployments across logistics and automation domains.
- Led and mentored a cross-functional engineering team of 5 (development, QA, and project management), improving delivery coordination and reducing project turnaround time through structured execution practices.
- Implemented standardized Software Development Life Cycle (SDLC) processes and quality controls, reducing redundant development efforts and accelerating release cycles while improving overall product reliability.
- Designed and deployed scalable cloud infrastructure and AI-enabled applications, including freight-forwarding platforms and automated expense receipt scanning systems, enabling high-volume data processing and operational efficiency.
- Established an internal SaaS innovation initiative, launching marketing automation bots and product experimentation programs that expanded service offerings and created new revenue opportunities.
Full-stack Engineer
Indus Valley Labs
- Contributed to startup-focused product development, delivering robust and scalable applications using .NET (C#), Java, Angular, and SQL Server.
- Developed internal algorithms to optimize the responsiveness and reliability of early-stage applications, with a focus on high scalability and clean architecture.
- Collaborated closely with stakeholders for feature design, prototyping, and delivery in fast-paced startup environments.
- Participated in internal blockchain R&D, exploring early integrations with decentralized platforms.
Experience
GuftaraAI (A complete Soverign AI conversational Voice Model Platform)
https://www.guftaraai.comYouTube Channel Automation & Growth System
RDTII Extraction Engine (UN Global Hackathon on AI for Digital Trade Regulatory Analysis)
AI-powered Warranty & Corporate Expense Management Mobile App
http://keepixs.comSorcrr
Additionally, I built a custom AWS-based video streaming pipeline that enabled candidates to record and upload professional video introductions directly on the platform, improving employer confidence and enhancing hiring decisions.
The result was a high-performance, scalable, and cost-efficient platform ready for global expansion while delivering a faster and more engaging user experience.
CureFlow | Diagnostic Lab System
The system streamlines the entire testing workflow from patient registration and test ordering to automated report generation, helping laboratories process tests 60% faster while significantly reducing manual errors. A centralized platform enables doctors, administrators, and reception staff to access the system via secure, role-based permissions, ensuring better control and collaboration. Barcode-based sample tracking was introduced to minimize handling errors and improve test management accuracy. The platform also integrates AI-powered analysis using OpenAI and Python to generate predictive health insights, helping identify potential disease risks and support preventive care.
With real-time dashboards for patient trends, operational performance, and revenue insights, CuraFlow enables laboratories to make informed decisions while providing a scalable foundation for future expansion.
Findurtrade
Finally, I enabled secure payment and settlement integrations to strengthen trust between global buyers and suppliers, while implementing multilingual support to expand access to the Saudi trade market.
The platform successfully scaled to 1,000+ customers in its early growth phase, positioning it as a reliable digital hub for international trade.
AI Agent for Pre-sales Automation
Code Migration Tool Using LLM and RAG
NicheAI | Employee Knowledgebase Chatbot | Internal Tooling
Semantic AI Search for eCommerce
Private Blockchain Network | Hyperledger Fabric | NISUM Blockchain R&D
Loyalty Program
Asset Transfer Ethereum-based Smart Contract
Shopping SEO Pages Optimization Feature | Williams Sonoma
Healthtech Clinical Trials Platform For Science37
https://www.science37.comXAPI Middleware Server for GAP
International Content Migration Tool | Williams Sonoma
Fintech Invoice Platform for Saudia-based Startup SWA
Education
Bachelor's Degree in Computer Science
Karachi Institute of Economic and Technology - Karachi, Pakistan
Certifications
Agentic AI Fundamentals: Architectures, Frameworks, and Applications
Large Language Models: Text Classification for NLP using BERT
Artificial Intelligence Foundations: Neural Networks (2018)
Advanced Web Development
Computer Collegiate
Hardware & Networking
Skill development Council Pakistan
Skills
Libraries/APIs
Node.js, React, Stripe API, SendGrid API, Pydantic, SQLAlchemy, WebRTC, TensorFlow, Vue, Vue 3, Stripe, REST APIs, Twilio API, Vuex, Chart.js, Entity Framework, jQuery, YouTube API, Claude API, Playwright, PaddleOCR, vLLM, Hugging Face Transformers
Tools
NGINX, Sequelize, Amazon CloudFront, Git, Docker Compose, Shadcn, Claude, Claude Code, MongoDB Atlas, Codex, AWS CodeBuild, Amazon CloudWatch, Amazon Simple Queue Service (SQS), Amazon Elastic Container Registry (ECR), AWS Fargate, Prisma, Webpack, Jenkins, GitHub CLI, Google Analytics, Apache HTTP Server, Visual Studio, DeepSeek, n8n, Okapi BM25, pgAdmin, Claude Agent SDK, ChatGPT, Stream Chat, Uvicorn
Languages
JavaScript, TypeScript, SQL, HTML, CSS, Python, HTML5, Python 3, Java, C#
Frameworks
NestJS, Express.js, Angular 15, Angular, JSON Web Tokens (JWT), Tailwind CSS, Payload CMS, LangGraph, React Native, Next.js, Alembic, Flutter, .NET Core, Jest, Spring Boot, .NET, Spring, Alchemy
Paradigms
Role-based Access Control (RBAC), Web App Design, Continuous Integration (CI), Model Context Protocol (MCP), Clean Code, Microservices, Event Sourcing, Microfrontends, Agile, Management, REST, B2B
Platforms
MacOS, Linux, Visual Studio Code (VS Code), Docker, Amazon Web Services (AWS), Vercel, Harness, Azure, Apache Kafka, Firebase, AWS ALB, Amazon EC2, AWS Lambda, Google Cloud Platform (GCP), AWS IoT, DigitalOcean, Hyperledger Fabric, Blockchain, Ethereum, Rancher, Grok, Replit, cPanel, Ollama, VOS
Storage
MySQL, PostgreSQL, Amazon S3 (AWS S3), JSON, Database Architecture, MongoDB, Redis, Elasticsearch, Amazon DynamoDB, PostgreSQL 10, CouchDB, SQL Server 2012
Other
Cursor AI, LangChain, RAG Architecture, Full-stack Development, Artificial Intelligence (AI), Architecture, Technical Leadership, Workflow Automation, APIs, AI Tools, AI Integration, Back-end Development, API Integration, Security, Full-stack, System Architecture, Minimum Viable Product (MVP), Consulting, Training, Vibe Coding, SaaS, Technical Architecture, Cloud Architecture, System Architecture Design, Scalability, Software System Architecture Development, Encryption, API Design, Debugging, Optimization, Performance, Third-party APIs, CMS, Data Accuracy & Reporting, Payment APIs, FastAPI, Fintech, GDPR, General Data Protection Regulation (GDPR), PWA, Progressive Web Applications (PWAs), Software as a Service (SaaS), WebSockets, Webhooks, HMAC, Web Applications, Generative Artificial Intelligence (GenAI), AI-generated Code, AI-assisted Development, Go-to-market (GTM) Strategy, Product Roadmaps, Software Architecture, Authentication, Authorization, HIPAA, Cloud Infrastructure, Application Security, Code Review, Fine-tuning, Google Colaboratory (Colab), ChromaDB, Pinecone, Embedding Models, AWS CodePipeline, AWS ECS Fargate, Monorepos, OpenAI, Prompt Engineering, Gemini, Large Language Models (LLMs), Supabase, CTO, Fractional CTO, Trading Bots, Distributed Systems, ElevenLabs Solutions, Mobile Apps, CI/CD Pipelines, Infrastructure as Code (IaC), Early-stage Startups, AWS Elemental MediaConvert, VPS, Ethers.js, Infura, ECS, .NET MVC, Hardware, Computer Networking, Web Development, Neuro-symbolic AI, Neural Networks, Language Models, Natural Language Processing (NLP), BERT, Agentic AI, Amazon Route 53, Team Leadership, ERPNext, Qwen, Anthropic, OpenAI GPT-4 API, AI Agent Orchestration, Lovable, Vector Databases, Pgvector, AI Automation, Kling AI, Remotion, LLM Integration, Crawl4AI, Tesseract, Optical Character Recognition (OCR), sentence transformer, pdfplumber, Text-to-Speech (TTS), LLM Fine-tuning, RAG Systems, RAG Pipelines, Retrieval-augmented Generation (RAG), Agentic RAG Systems, AI Inference, Open Source, Google Gemma, Team Mentoring, AI Architecture, Leadership, AI Infrastructure
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