
Muhammad Jabbar
Verified Expert in Engineering
Software Developer
Sliema, Malta
Toptal member since October 8, 2024
I am an AI Systems Architect and Engineering Lead with 10+ years of experience building scalable software platforms, distributed systems, and AI-powered products. My recent work focuses on RAG architectures, agentic workflows, autonomous systems, and production LLM integrations. I have led small engineering teams, owned technical direction and delivery, and built systems end-to-end, from data ingestion and retrieval pipelines to user-facing applications deployed at scale.
Portfolio
Experience
- Node.js - 11 years
- JavaScript - 10 years
- TypeScript - 8 years
- React - 6 years
- PostgreSQL - 5 years
- Django - 3 years
- NestJS - 3 years
- Nuxt 3 - 2 years
Preferred Environment
AI Automation, Ai/llm technologies, AI Agents, Amazon DynamoDB, Amazon Web Services (AWS), AI Research, Apache Kafka, API Integration, JavaScript
The most amazing...
...work I've done was handling millions of alarm requests at Calipsa.io and enhancing brands like Timberland and Vans with optimized eCommerce solutions.
Work Experience
Founding Growth Engineer & AI Architect
Freelance Client
- Architected a centralized data warehouse (Google BigQuery) integrating Shopify Plus, Google Ads, and supplier APIs across a 1M+ SKU catalog, enabling unified data access and analytics at scale.
- Built Python-based autonomous agents to dynamically adjust pricing and inventory tagging based on real-time sales signals and business rules.
- Designed and implemented LLM-powered enrichment pipelines, transforming raw manufacturer data into structured, high-converting product content at scale.
- Owned end-to-end API integrations across Shopify, Google Merchant Center, and external supplier systems, ensuring data consistency and reliability across the platform.
- Developed agentic workflows combining retrieval, validation, and deterministic output generation, improving data quality and automation reliability.
Senior Software Engineer
Motorola Solutions
- Architected and maintained high-scale microservices (Python, Node.js) handling 2M+ daily requests.
- Ensured 99.9% uptime via Kubernetes orchestration and optimized database performance.
- Designed and implemented LLM-powered systems and agent-like workflows, enabling contextual reasoning, tool execution, and intelligent automation.
- Built RAG pipelines combining structured + behavioral data for semantic retrieval and personalization.
- Developed an AI recommendation engine for real-time adaptive user interactions in production systems.
- Built Python-based AI infrastructure for validation, monitoring, and feedback loops, improving reliability by 40%.
- Implemented observability and evaluation pipelines (Grafana, Kibana) for tracking AI behavior and system performance.
Senior Software Engineer
Quext
- Built a leasing microservice using NestJS to manage the entire leasing process, including resident application, notice submission, and move-out procedures.
- Developed rental services to manage all transactions generated during leasing processes, integrating with accounting services for accurate application.
- Managed the entire migration and synchronization of a large dataset from a legacy system to a new platform.
Senior Frontend Developer
VF Corporation
- Developed the Canvas project for Timberland.com, supporting multiple languages, brands, and regions. Worked on auth, cart, and checkout, integrating payments via Adyen and CyberSource (cards, Apple Pay, and Klarna), improving performance.
- Facilitated the success and growth of Fortune 500 brands by enhancing user experience and optimizing performance on crucial pages to deliver a user-centric and high-performing interface for the eCommerce platform.
- Led payment integration for Canvas based on regions and brands. Reduced HTTP calls and unnecessary rendering. Focused on auth, cart, and checkout, integrating Adyen and CyberSource (cards, ApplePay, and Klarna) to improve performance.
Full-stack Engineer
Calipsa
- Designed, developed, and maintained a suite of services that processed millions of daily requests.
- Developed a complete annotation tool for collecting object annotations from two users, including a model review for error detection and a review process. Managed large datasets for model training and testing and visualized ground truth results.
- Built a pipeline for thumbnail generation and a production debugging tool to visualize model predictions on alarms, aiding in identifying reasons for false positives and false negatives.
Product Architect
Madera Residential
- Enhanced the residential portal and move-in process, optimizing database queries for improved response times.
- Addressed bugs from GitHub promptly to ensure a stable system. Enhanced invoicing features and improved Algolia search functionality.
- Integrated TransUnion for identity verification and resident screening to prevent fraud before move-in.
Full-stack Engineer
FiveRivers Technologies
- Developed a social media attack prevention tool using rule-based AI and created network charts illustrating connections between attacks utilizing a graph database.
- Contributed to Darwin, a tool for data scientists to train and test models by simply uploading data and selecting desired models.
- Utilized Highcharts to visualize prediction results across different models and used Docker for deployments.
Experience
Timberland
The website offers a seamless and user-friendly shopping experience. I played a key role in the front-end team, contributing to the development of a newer and improved version of the Timberland website. I led efforts to enhance non-functional requirements, including Akamai redirects, SEO optimizations, and improved logging with Dynatrace and Prometheus. I streamlined the deployment process by integrating events from the Jenkins pipeline directly into Dynatrace. I worked as part of the front-end team to handle the My Account and Checkout modules. I integrated the sign-in/sign-out flow, managed profiles, and handled user purchases.
Furthermore, I worked on the complete flow of the cart and checkout by integrating APIs with MuleSoft and managing all payment methods using different integrations for different locales. I integrated payment methods such as PayPal, Klarna, credit card, and iDEAL using Adyen and Cybersource. Additionally, I leveraged Vue, Nuxt 3, Vite, and Tailwind to create a performant and visually appealing user experience.
The North Face
I worked as part of the front-end team to handle the My Account and Checkout modules. I integrated the sign-in/sign-out flow, managed profiles, and handled user purchases. Furthermore, I worked on the complete flow of the cart and checkout by integrating APIs with MuleSoft and managing all payment methods using different integrations for different locales. We also supported the internationalization feature to provide multi-language support. Additionally, I leveraged Vue, Nuxt 3, Vite, and Tailwind to create a performant and visually appealing user experience.
Quext (Smart Apartment Technology)
http://quext.ioCalipsa
https://www.calipsa.ioMadera Residential (Property Management Solution)
https://newco.maderaresidential.com/Artemis (Social Media Attack Detection)
Darwin (Deep Learning Predictions)
It serves as a comprehensive platform that allows businesses to train their models using CSV data, make predictions, and analyze their business performance and future growth. With Darwin, users have the flexibility to train and predict various types of models, empowering them to gain valuable insights into their operations. Furthermore, Darwin is a machine learning product that enhances data science at scale by automating the process of building and deploying models. It provides a productive environment for data scientists of all levels of expertise, enabling them to quickly prototype use cases, develop, fine-tune, and implement machine learning applications more efficiently compared to traditional methods. Tasks such as data cleaning, latent relationship extraction, and optimal model selection are automated by Darwin.
The platform also facilitates rapid and accurate feature generation through automated windowing and risk generation techniques. Additionally, Darwin utilizes both supervised and unsupervised learning methods to create highly accurate and dynamic models.
Westend Dental Connect | HIPAA-compliant Healthcare Platform
I led the end-to-end development of the platform using React and Node.js, designing secure authentication and authorization workflows integrated with Microsoft Entra SSO for clinician access. I implemented subscription and membership management through Chargebee, integrated the Dojo API for payment processing, and built secure back-end services and APIs to support HIPAA-compliant workflows. I also contributed to UI/UX improvements, deployment on DigitalOcean, and established robust authentication, session management, and data protection mechanisms.
The result was a scalable, enterprise-grade healthcare platform that centralized clinician operations, simplified membership and billing workflows, improved operational efficiency, and provided a secure, compliant experience for both providers and administrators.
NeuroCart AI | Intelligent Retail Personalization Engine
I architected and engineered the end-to-end AI platform, designing scalable ML and data pipelines to process customer interactions and continuously adapt recommendations. Using TensorFlow, PyTorch, Hugging Face, and spaCy, I developed recommendation models leveraging NLP, sentiment analysis, reinforcement learning, and predictive analytics. I also implemented distributed data pipelines with Spark and Airflow and deployed production models using TensorFlow Serving and TorchServe for low-latency inference at scale.
The platform increased conversion rates by 35%, improved average order value by 20%, and significantly enhanced customer engagement and loyalty.
Halal Labs | Authentication and Checkout Optimization Platform
I engineered and implemented a comprehensive solution by performing deep back-end analysis and troubleshooting across the authentication, database, and checkout workflows. Using Supabase, PostgreSQL, Node.js, and Stripe, I identified and resolved inconsistencies between authentication state and user records, redesigned user state management, and stabilized the end-to-end purchase flow. I also enhanced front-end interactions with Vue 3 and optimized system behavior to ensure seamless sign-up, login, and checkout.
The result was the successful resolution of a revenue-impacting production issue, restoring checkout functionality for returning customers, improving conversion rates, and strengthening customer trust.
Education
Bachelor of Science in Computer Science - (BSCS) in Computer Science
Punjab University College of Information Technology - Lahore, Punjab, Pakistan
Skills
Libraries/APIs
Node.js, React, Stripe, Stripe API, Stripe Connect, Stripe Connect API, OpenAPI, Vue 3, Google Maps API (GeoJSON), Fabric.js, Vue 2, Vuex, Vue, Instagram API, X (formerly Twitter) API, REST APIs, Highcharts, D3.js, Microsoft Authentication Library (MSAL), TensorFlow, PyTorch, SpaCy, Puppeteer, Chart.js, Recharts
Tools
Google Analytics, Stripe Checkout, Wix, GitHub, Git, Terraform, Retool, Claude Code, TransUnion TLOxp, Grafana, Kibana, Jira, Confluence, Adyen Payments, Drizzle ORM, Redux Toolkit, Apache Airflow, TensorFlow Serving
Languages
JavaScript, TypeScript, Python, SQL, Rust, Java, Go, PHP, CSS, HTML5, TypeScript 5, GraphQL, Python 3
Frameworks
Express.js, Next.js, WebApp, Spring Boot, Nuxt 3, NestJS, PixiJS, Laravel, Tailwind CSS, Jest, AngularJS, Angular, Django, Flask, Nuxt.js, JSON Web Tokens (JWT), Redux, Spark
Paradigms
DevOps, Event-driven Architecture, DevSecOps, Microservices, Agile, Unit Testing
Platforms
Web, FlutterFlow, AWS Lambda, Amazon Web Services (AWS), iOS, Shopify, Algolia, Docker, Apache Kafka, Heroku, DigitalOcean
Storage
JSON, Elasticsearch, MongoDB, Amazon DynamoDB, Redis, PostgreSQL, MySQL, Graph Databases
Industry Expertise
Healthcare
Other
Startups, Coding, Email Authentication, Web Development, Web App UI, Front-end, AI Agents, Full-stack, Minimum Viable Product (MVP), Stripe Terminal, Prompt Engineering, Software Development, Software, AWS Certified DevOps Engineer, Cursor AI, APIs, CI/CD Pipelines, Scalability, Infrastructure, Infrastructure as Code (IaC), Full-stack Development, Web Applications, Embedded Rust, Code Review, Dashboards, API Design, Architecture, Back-end, Concurrency Patterns, FastAPI, Web Scraping, Fintech, Large Language Models (LLMs), AI/ML Workloads, LangChain, Google BigQuery, AI Automation, AI Model Training, AI Research, Agentic AI, Tailwind UI, UnoCSS, CAPTCHA, Pinia, Payment APIs, Sprints, Vue Storefront, API Integration, Chatbots, No-code Development, RAG Systems, Llama 2, Ai/llm technologies, Hugging Face, Machine Learning Operations (MLOps), Supabase, Command-line Interface (CLI)
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