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🥇Top 1% Data Engineer and Analytics Specialist 🎓 Master’s in Data Science | University of Coventry, UK 🎯 Trusted by clients like Microsoft and Windsor.ai, I help businesses build scalable data pipelines and analytics that empower smarter decisions. As a Senior Data Architect, I have 7+ years of experience in developing ETL pipelines, large-scale data engineering infrastructures, data mining, and warehousing projects. Further, I have managed and successfully deployed multiple data analytics projects, followed by expert MLOps services for maintaining the integrity and performance of various models in production. ✔️ ETL and Warehousing Services • I have developed and deployed complex data mining architectures involving hundreds of websites and millions of records, coupled with scraping solutions addressing JS, login/authentication, CAPTCHA, ReCAPTCHA, IP blacklisting, User-Agent Rotation, etc. • I'm highly skilled in Python, Scrapy, Beautiful Soup, Selenium, Splash, Regular expressions, XPath, JS, and AJAX. ✔️ Data Engineering Services • I have developed robust data pipelines, capable of continuous and extensible data processing. • I have implemented end-to-end solutions catering to diverse data sources, deployed on cloud/servers via cron jobs/automated services. ✔️ Data Science and Analytics Services • I offer expert data analysis for extracting key insights and complex correlations. Further, I can help identify key metrics for performance optimization across various niche. • I provide real-time BI services based on crafty yet simplistic visualizations across various platforms such as Google Data Studio, PowerBI, Tableau. • I have deployed multiple data science solutions in production based on complex statistical models and ingenious feature engineering, which provide insightful forecasting and predictive analytics. • I offer expert MLOps services for developing and optimizing in-production ML pipelines, impervious to data drift/leakage. I build optimal solutions for my valued clients across a diverse array of SMEs, following the best Software Engineering practices based on smart Requirement Analysis and industrious Quality Assurance. Keywords: Python, Google Data Studio, Google Analytics, Google Tag Manager, Tableau, MLflow, TensorFlow, R, Data Pipelines, ETL, Data Engineering, Data Extraction, Data Mining & Warehousing, Scrapy, Selenium, BeautifulSoup, Automation, Scrapers, NumPy, Pandas, NLP, Data Analytics, Forecasting.

Senior Python engineer building large-scale web scraping systems, reliable APIs, and LLM/RAG data pipelines that run in production — tested, monitored, and built to last. 🏆 Top Rated Plus (top 3%) · $300K+ earned · 7,400+ hours billed ━━━━━━━━━━━━━━━━━━━━━━ RECENT PRODUCTION RESULTS 🌍 Built and operate a scraping platform covering 20+ sources behind enterprise anti-bot protection (Cloudflare-class WAFs, residential proxy rotation, fallback transport chains) — 225K+ documents collected, 30+ scheduled pipelines running daily without babysitting. 💳 Built a rewards-data aggregator scraping 30+ retail and banking sources — 60K+ fresh offers per day, normalized into one schema and served through a load-balanced API at 105+ requests/sec. 🤖 Turned scraped-document chaos into structured data with a RAG extraction system (LLM + Pinecone) over 100K+ documents — measured accuracy up from 33% to 84%, every AI output traceable to its source. ━━━━━━━━━━━━━━━━━━━━━━ WHAT I DO ✔️ Web scraping & data extraction — Playwright, Selenium, Scrapy; resilient access to protected sources, proxy management, scheduled fleets via Celery, PDF/Excel/Word extraction, normalization into clean schemas ✔️ LLM & RAG backends — OpenAI/Anthropic APIs, Pinecone, vector search, structured extraction from messy documents, accuracy evaluation, cost & latency optimization ✔️ API development — FastAPI, Flask, Django; auth, rate limiting, background jobs, clean documentation ✔️ Distributed systems — Celery, RabbitMQ, Redis; retries, idempotency, fault tolerance under real load ✔️ Production ops — Docker, AWS, PostgreSQL/MongoDB/Neo4j, zero-downtime migrations, CI with 2,000+ tests per project ━━━━━━━━━━━━━━━━━━━━━━ HOW I WORK ✅ I own systems end-to-end: architecture → implementation → deployment → monitoring → handover docs. ✅ Scrapers that keep working: per-source error recovery, alerting, and proxy fallbacks — not scripts that die in a week. ✅ I'll tell you when an LLM is the wrong tool — and what to use instead. ✅ Most of my $300K+ comes from repeat clients and multi-year engagements. ━━━━━━━━━━━━━━━━━━━━━━ If you need scraping infrastructure that survives contact with real anti-bot systems, an API that holds up under load, or an LLM pipeline with measurable accuracy — send me a message with a couple of lines about your project and I'll tell you straight away whether I'm the right fit.

🏆 Top 3% on Upwork. ✅ Fluent English. ✅ Swift response and communications. ★★★ Top Rated Freelancer ★★★ As a passionate and dedicated full-stack web and mobile app developer, I bring over 10 years of hands-on experience in multiple frameworks to every project. With expertise in JavaScript, Python, React JS, React Native, Node JS, Django, Frappe, Flask, and more, I have a track record of delivering high-quality PWAs, ERPs, CMS/CRM, websites, and mobile apps across a wide range of niches, including health, beauty, and education. My Porfolio Website: shahzaibjamal.com WordPress Services: Custom theme design or theme/template modification Responsive HTML (Google mobile-friendly test, cross-device compatibility) Retina display support HTML5 animation WordPress/Woo back end development WordPress multisite and membership, BuddyPress, bbPress Custom plugin development 3rd-party services and payment systems API integration SEO, AMP compliance, CDN setup (Cloudflare) Support and warranty Great Experience with: E-commerce development Payment systems integration (PP, Stripe, Authorize.net, etc.) Google Maps API utilization (custom design, clusters, routing, radius, speed/time/distances calculation, etc.) Responsive CRM and dashboards for high-traffic web-projects Experience with Microsoft Power BI Attributes: Keep the warranty Always available Fast response and turnaround time === TAGS === ReactJS Developer ; PHP expert ; Fullstack developer ; Python. WordPress Developer, WordPress expert #Website, #Wireframes, #Icons, #Landing Page, #Email Template Design, #Prototype, #Website Redesign, #Sketches, #HTML5, #HTML, #CSS, #JavaScript, #PHP, #SCSS, #Less, #CSS3, #Sass, #Visual Design, #Graphic Design, #SEO, #Mobile App Design, #Website Development, #Responsive Design, #Squarespace, #WordPress, #Wix, #October CMS, #GoDaddy, #Gravity Forms, #WooCommerce, #Divi, #BuddyPress, #PayPal, #Contact Form 7, #bbPress, #Yoast SEO, #MailChimp, #Slider Revolution, #WPLMS, #Thrive Themes, #GetResponse, #LinkedIn, #Google AdSense, #Amazon, #Elementor, #Instagram, #WP Rocket, #Figma, #Adobe Illustrator, #Zeplin, #Adobe XD, #InVision, #Mockplus, #Adobe Photoshop, #Tablet, #Phone, #SQLite, #Redis, #MongoDB, #Oracle Database, #React, #Firebase, #React Native, #RESTful, #Android Studio, #Amazon Web Services, #Node.js, #GraphQL, #AngularJS Flutter, #jQuery Mobile, #Ionic Framework, #Xamarin, #Android iOS, #JavaScript, #Java, #PHP , #Kotlin, #CSS3, #HTML5, #Swift, #Objective-C, #Expo.io, #jQuery UI, #Mobile App Development, #App Store Optimization (ASO) , #ORM, #Ember.js, #Functional Programming, #Redux Framework, #Paypal Integration, #iPhone App Development, #Issue Tracking Systems, #Functional Testing, #Compiler, #Remote Management, #Slack, #iPad UI Design, #Object Oriented Programming (OOP) , #Microsoft Windows Azure, #sketch app, #Rackspace, #iPhone UI Design, #SCSS, #GUI Design, #API Testing, #CURL, #PhpStorm, #Payment Gateway Integration, #Google Cloud Platform, #NoSQL, #Angular 5, #SSL, #Skype, #Software Debugging, #2D Animation, #Redux Form, #FTP, #3D Animation, #Debian OS, #Android SDK, #Mobile App Testing, #App Usability Analysis, #iPad App Development, #JSON API, #Mobile UI Design, #App Store Google APIs, #Amazon S3, #Apple Xcode, #API Documentation , #API Development, #Mobile Development Framework , #AWSApplication , #Animation, #Application Lifecycle Management, #Apple macOS, #XML, #Design, #Lumen Micro Framework, #Sketch, #Geolocation, #Website Localization, #Payroll Processing, #PayPal Development, #Paypal Integration, #WPML, #Web Design, #OptimizelyWeb/graphic Design, #WordPress Plugin, #Page Speed Optimization, #Payment Processing, #GDPR, #Wordpress Theme, #AMP Web Development, #Logo Design, #PSD to Wordpress, #Authorize.Net, #Accessibility, #WordPress Website, #Payment Gateway Integration, #Frontend Development, #Google Search Console, #Data Processing, #Regular Expressions, #Yandex API, #VKontakte API, #Flat Design, #MySQL, #Data Encoding, #CURL, #Yandex.Metrica, #Angular 5, #2D Animation, #Acuity Scheduling, #SMS Gateway, #Google Analytics API, #Load Testing, #PhpBB, #NGINX, #Google AdSenseTwitter Bootstrap, #AngularJS, #Character Design, #Data Management, #2D Design Regards, Shahzaib Jamal

I build an auditable document-processing layer that converts real, messy, unstructured data into structured data and makes your RAG system actually work. My longest engagement ran two years on retainer — a water consultancy processing lab reports across 10+ changing layout variations, where I cut manual data entry by 75%. Based in the UK. Most clients find me after something that was partly working stops working. The extraction script handled 80% of documents fine, then broke on the rest and the team can't explain why. That's the failure mode I'm specifically set up to prevent. ──────────────────────────────────────── HOW I WORK My job is to know the failure modes before we write the first line of code. I start with the simplest approach and iterate from there. Over-engineering is the most common failure mode in document processing — reaching for LLMs when regex would do, or building custom infrastructure when a single API call would do. My pipeline development follows the same sequence every time: 1. Define the schema first If I can't describe what clean output looks like, extraction will always be unreliable. Pydantic schema before touching any document. 2. Establish a regex baseline A deterministic check tells me exactly where the hard cases are before introducing any probabilistic tool. 3. Introduce LLMs incrementally Start with the simplest prompt possible. Iterate against real documents. If a simpler rule-based approach gets you 90% of the way, I'll say so — and we'll skip the LLM. 4. Apply layout detection last Only where variation genuinely requires it. This sequence keeps pipelines predictable, testable, debuggable, and maintainable. The system that breaks on document 47 with no explanation is the most common complaint I hear from clients who've tried other solutions first. ──────────────────────────────────────── WHAT CLIENTS SAY "Thanks to Subhajit's work, we are saving countless hours having to manually enter results into our own template." "Subhajit's professionalism, meticulous attention to detail, and expert handling of our project were apparent from the outset." "He always delivers great results. His communication is clear, he takes feedback well, and he consistently finds effective solutions." ──────────────────────────────────────── WHAT I DO IDP Diagnostic & Action Plan — fixed price If your document pipeline is failing or underperforming, I audit your current approach, identify failure points, and deliver a written action plan with execution steps. Implementation is optional and available on request. Document Extraction Pipeline I build systems that extract structured data from PDFs, invoices, lab reports, contracts, and email attachments. They handle layout variation and format drift — the things that break simpler solutions in production. System Integration & Ongoing Support I connect extraction pipelines to downstream systems: Excel, databases, APIs, and internal tools. Retainer support is available as your document types evolve. ──────────────────────────────────────── RESULTS - Cut manual data entry by 75% for a water consultancy processing lab reports across 10+ changing layout variations - Maintained and expanded over a two-year retainer — the system became central to the client's daily operations - Extended the pipeline to process email attachments directly, removing a manual download-and-upload step ──────────────────────────────────────── TECHNICAL STACK Document Processing: pdfplumber, PyMuPDF LLMs & Extraction: OpenAI API (GPT-4o-mini) Validation & Structure: Pydantic, JSON schema Backend & APIs: FastAPI, REST API design Databases: PostgreSQL Version Control: Git, GitHub ──────────────────────────────────────── LET'S START SMALL Start with a Diagnostic Session. Fixed price: $250. You share your documents and describe the problem. I review your current approach, identify the exact failure points, and deliver a written action plan with implementation steps. No long commitment. If you choose to proceed, we scope the full pipeline together. If not, you still have a concrete plan you can share with anyone. Send me a message with a brief description of your document problem. I'll tell you within 24 hours whether I can help and how.

I'm a freelancer that specialises in solving difficult, technical real world problems that other's walk away from. I can help you with any problems involving: Data processing and analysis Web scraping Mathematics Statistics Quant Finance Optimisation Linux system administration (including online cloud platforms) SQL database administration Scripting in VBA, python, bash, php and anything else that is similar Automation of repetitive administrative tasks (dovetails nicely with aforementioned tools) Any other technical problems in a variety of fields which don't neatly fit into this list. I have written a lot of webscrapers, robust, fully automated, running every day with no human intervention. I've written linear regression models to identify second hand cars priced below market rates. I have written low level C code to quickly calculate a Fast Fourier Transform on limited hardware. I have done a lot of Monte Carlo simulation in R. I've written C code to integrate systems of differential equations to calculate a bullet's trajectory. My educational background is bachelors in mathematics, and a masters in finance. Programming languages I use range from low to high level: Assembly C C++ Python R VBA Bash Google script Other tools at my disposal: Google Cloud Virtual machines Windows servers Linux servers I look forward to discussing your projects with you. Alex.

UPWORK TOP RATED & EXPERT VETTED Experienced and versatile Python developer. Former IT Project Manager at IBM and GlaxoSmithKline. Specialist areas of interest include: * Web scraping and HTML parsing with Python, Selenium, SeleniumWire, Scrapy, BeautifulSoup, Requests, Niquests, LXML, Parsel etc. * AI Prompt Engineering, fine tuning, integration and and automation using LangChain, EmbedChain, Chainlit, Autogen and Semantic Kernel. * AI/Machine Learning using OpenAI, Coreweave, Huggingface, Forefront, Bing Chat, Copilot, Bard etc. * Vector databases including MongoDB vector, Chroma, Pinecone, Weaviate, and Facebook AI Similarity Search (FAISS). * Large Language Models (LLMs): LLaMa, GPT-3, GPT-3J, GPT3.5, and GPT-4 etc. * Rapid development of Web Apps using Bottle, Flask, Streamlit, Flutter/Flet, and Anvil.works. * Data Wrangling to and from HTML, Google Sheets/Docs, Excel, Word, PowerPoint, PDF, CSV, JSON, XML and more. * ETL (Extract, Transform, Load) tasks and pipeline processing including Apache Airflow, monads and function chaining. * NLP (Natural Language Processing) using NTLK, SpaCy, Fuzzy Search, and regular expressions (Regex). * IPython/Jupyter notebooks for data science hosted on Deepnote, Gradio, and Google Colaboratory. * Data analysis and visualisation mainly with Pandas, Bokeh, Matplotlib, Plotly, Google Maps, and Folium. * Writing and using APIs with batch processing and concurrency e.g. with Asyncio, Multiprocessing, Threading. * YouTube/Video automation, video editing/processing, subtitles, speech-to-text and text-to-speech. Three decades of experience finding creative solutions to business and IT problems. Author of several open sources projects including: Log2d, CleverDict, CleverText, and EasyPyPI... downloadable from Github and the Python Package Index. Now taking on small, short to medium term coding projects on a flexible/part-time basis.