Hire the Best Regular Expressions Developers in Dhaka, BD

I am a software engineer specializing in algorithmic coding and backend development with Java, Python, and JavaScript. I have a proven track record of solving complex coding challenges with precision, efficiency, and clean, readable code. Why I am the right fit for your coding tests: Extensive Algorithmic Practice: I have successfully solved 200+ algorithmic problems on platforms like LeetCode and HackerRank, focusing specifically on optimization and logical clarity under time constraints. This is a direct match for the sample tests you need completed. Proficiency in Your Tech Stack: I am highly proficient in the required languages: Java, Python, and JavaScript. I can quickly and accurately complete tests in any of these. Focus on Accuracy & Detail: My experience in backend development (Spring Boot, Django) has trained me to write robust, error-free code and pay extreme attention to detail—ensuring the completeness and accuracy of every test solution I deliver. Efficient & Reliable: I understand the importance of deadlines. I am prepared to complete the 1 to 1.5-hour tests efficiently from my home office and provide clear, constructive feedback on the test experience. I am available to start immediately and am ready to demonstrate my skills. Let's connect.

🏆Top Rated Plus | 100% Job Success | 7+ Years Expertise. I build resilient, self-healing AI scrapers that extract structured data from the most complex websites while others are still getting blocked by anti-bot systems. If you are tired of scripts that break or data that requires manual cleaning, I provide the professional-grade solution you need. With over 100 successful projects, I specialize in architecting "Agentic" scraping workflows—systems that use AI to adapt to layout changes and bypass advanced protections like Cloudflare and CAPTCHAs. ⚡ What I Can Do for You: ◉Intelligent Web Scraping: High-speed extraction from dynamic JavaScript sites (React/Vue) using Playwright, Scrapy, and Selenium. ◉AI-Powered Data Pipelines: Converting unstructured web data into LLM-ready formats (JSON/Markdown) for RAG systems and business intelligence. ◉Automated Monitoring: Real-time price tracking and alerts for e-commerce, real estate, and financial markets. ◉Enterprise Infrastructure: Deploying scalable scraping clusters on AWS/Google Cloud using Docker to handle millions of records. ⚡ Technical Stack: ◉Languages: Python (Expert), JavaScript (Node.js). ◉Frameworks: Scrapy, Playwright, Selenium, BeautifulSoup, FastAPI. ◉Data Handling: Pandas, NumPy, SQL, Excel/CSV. ◉Anti-Blocking: Proxy Rotation, Stealth Browsing, CAPTCHA Solving. Let’s turn your data needs into a competitive advantage. Send me a message today to discuss your project requirements!.

With 15+ years of experience in extensive list of technologies, I am able to provide you with high quality, sophisticated, robust solutions that are well tested, efficient, accurate. I shine at diving into your existing codebase, find the source of issues, and resolve them without breaking another thing. If you have old legacy code, or a vibe coded program that is not working, I can fix them up for you to clean and conscious code. Need to automate? Got your back. Data processing, parsing complex PDF? Sure thing! You need it, if there is solution for it, I can get it done. Technologies I am currently working with: Rust, Python, Axum, SQLAlchemy, FastAPI, Django, PostgreSQL, SQLite, HTMX, ReactJS, Tailwindcss, RunPod, AI/LLM I am a passionate software engineer who enjoys challenges, and finding solutions. I have extensive experience of diving into existing code, finding issues, and resolve them. As a hardworking, resourceful engineer who also loves automating things, that usually saves a lot of time, I can provide the best service for the most reasonable costing. Besides developing data mining applications, automation tools, Websites, I have personal interest in Open Source projects. Here's a list of, but not limited to, responsibilities I have successfully fulfilled: ◾️ Desktop application ◾️ Refactoring ◾️ Prompt Engineering (Local LLM) ◾️ Machine Learning ◾️ Web development ◾️ Web Scrapers ◾️ Email processing ◾️ Distributed applications ◾️ ETL ◾️ Automation ◾️ Server configuration and deployments ◾️ Bug fixing and code improvements ◾️ High Performance computing Let's get in touch.

Expert Developer | PHP Laravel | Python FastAPI Django | Java Spring Boot | AI Agent Development | LLM Integration | RAG Pipeline | AI Data Engineer | Vector Database | Redis | MySQL | PostgreSQL | PgVector | React | FinTech | Payment Systems | MFS - Mobile Financial Service | Go | Rust | C/C++ | NodeJs | Kafka | RabbitMQ | High-Performance Microservices | Event Driven Design | Domain Driven Design | AI Chatbot | 7+ years of professional experience | I build backend products that ship and stay fast under load — Laravel apps delivered end-to-end, FastAPI services with AI/RAG wired in properly, and payment systems moving real money. If you need a Laravel product built or rescued, an LLM feature integrated without turning your codebase into a prototype, or a slow API diagnosed and fixed, that's my lane. 7+ years of professional experience, including bKash (Bangladesh's largest mobile financial service, millions of daily transactions) and 2.5 years working remotely with SELISE, a Zürich-based software company, on Swiss and European enterprise projects. => SELECTED WORK ## PHP Laravel product delivery (Aerotia International + open source) Delivered a CMS-driven corporate website end-to-end for an aviation & marine solutions distributor: Laravel 12 (PHP 8.2) JSON API with a Blade admin CMS and a React 18 + TypeScript frontend, live in production — plus a Laravel 9 ledger/accounting portal for the same client. I also author and maintain laravel-gitstamp, an MIT-licensed open-source Laravel package CI-tested across Laravel 10–12. Earlier professional Laravel work includes a healthcare-planning app and a government HR reporting system. — details and code in my Portfolio. ## AI RAG pipeline over S3 document stores (Python/FastAPI) Built a retrieval-augmented generation pipeline that ingests and indexes documents directly from S3 buckets — OpenSearch (kNN, HNSW, cosine similarity) for semantic search, sentence-transformer embeddings, and Redis caching that cut repeat-query latency from 45-150 seconds down to under 200ms. FastAPI backend, fully containerized. Teams query their document archives in natural language instead of digging through them manually. — details and code in my Portfolio. ## AI Assistant with hardened edge security Built and hardened a production AI chat assistant for this portfolio: found and fixed a leaked API key exposed in a client-side bundle by moving secrets into a Cloudflare Worker as an encrypted proxy. Added origin allowlisting, per-IP rate limiting (20 req/60s), 30s timeouts, and field-level request validation. Diagnosed and fixed compounding latency bugs via observability — cut model response time from 6.1s to 2.3s. Grounded on parsed CV/context docs with confirmed-action triggers for safe user interactions. — details and code in my Portfolio. ## Fintech core payment platform (bKash) Contributed to microservices architecture for a payment platform handling millions of daily transactions. Optimized database queries and Redis caching strategies, improving response times by 40%. Led a zero-downtime Spring Boot 2→3 production migration of a live PIN-reset service — Jakarta EE namespaces, AWS SDK v1→v2 (DynamoDB Enhanced Client), reactive Kafka — with no service interruption on a system where downtime means real customer impact. ## Enterprise IoT platform (Swiss client, via SELISE) Built a multi-tenant IoT middleware for an electric vehicle/aerospace manufacturer, processing millions of data points in real time. Extended the open-source ThingsBoard platform with custom rule nodes, an MBUS decoder, and Swisscom network integration (Java, PostgreSQL, Cassandra, TimescaleDB, WebSocket). I'm also a merged contributor to ThingsBoard itself. ## Online Judge platform (Rust/Axum) Competitive-programming judge built as microservices, deployed via Kubernetes Helm with KEDA autoscaling on Kafka consumer lag — workers scale with actual load instead of running fixed capacity 24/7. => HOW I WORK Async-first and timezone-flexible, with clear documentation and milestone-based delivery so you can course-correct early. I hold my own code to the same standard I enforced as a mentor and reviewer at bKash: 85%+ test coverage, clean commits, CI/CD from day one. Message me with what you're building — I'll give you a straight read on scope and approach before you commit to anything. Key differences from the version stored in Upwork_analysis.md earlier: the keyword line now opens with the exact title phrases (helps Upwork search match title ↔ overview), the hook sells "Laravel built or rescued + AI integrated cleanly" instead of fintech-first, and bKash moved to #4 — still prominent for credibility, but no longer contradicting a Laravel-led title. All Laravel claims remain verified against the portfolio repo.

Do you need clean, structured data from websites that seem impossible to crack? I am a professional Data Engineer with a Master’s degree in Interactive Multimedia (Victoria University, Melbourne) and over a decade of experience building robust extraction systems. I specialize in custom-built Python scrapers designed to bypass sophisticated anti-bot defenses. Whether you need data from JavaScript-heavy AJAX elements, e-commerce giants, or real estate platforms, I provide clean, structured datasets tailored exactly to your business needs. Why Partner With Me? - AI-Powered Insights: AI services like Gemini and ChatGPT are integrated directly into scraping workflows to summarize text, categorize products, or extract insights from unstructured data and images in real-time. - Modern Browser Automation: Playwright and Selenium are utilized to mimic human behavior, navigating dynamic content and interactive elements that standard scrapers miss. - 24/7 Cloud Infrastructure: Self-sustaining scrapers are deployed on Linux VPS and AWS EC2 instances, allowing data collection to run automatically around the clock. - Seamless Platform Integration: Using Python libraries, data connects directly to Monday dot com, Slack, Google Sheets, Telegram or other popular apps to fetch or send data in real-time. - Anti-Block Expertise: Advanced IP rotation, parallel threading (Multiprocessing), Captcha solving (using external services) and randomized delays or navigation are implemented to ensure high-speed extraction while remaining undetected. - Turnkey Data Delivery: Data is cleaned and restructured so it arrives perfectly formatted in Excel, Google Sheet, Database Tables or CSV using deep VBA/Macro or SQL expertise. Core Services Provided: * AI-Enhanced Scraping: Using LLMs, Gemini or Chat GPT to clean, translate, or summarize scraped data automatically. * Full-Scale Web Scraping: Real-time data from E-commerce, Real Estate, and Government or Public directories and websites.. * Automated Cloud Solutions: Deploying scrapers on AWS/VPS for scheduled daily or weekly updates. * App & Tool Automation: Bi-directional data syncing between the web and tools like Slack, Telegram, and Google Sheets. * Web Task Automation: Automating form fill ups and submissions, and multi-step workflows. Technical Expert Toolkit: - AI & Automation: Gemini/ChatGPT API, Playwright, Selenium, BeautifulSoup, Multiprocessing. - Languages: Python, VBA, SQL, VB.net, Regex, HTML/CSS. - Environments: Linux (Ubuntu/Debian), AWS EC2, VPS, Windows Desktop. - Data Handling: Excel Macros, Postgresql or MYSQL Server, Google Sheet, Libre Office Calc Availability & Workflow: - Working Hours: Monday – Saturday (5:00 AM – 3:00 PM UTC | 11:00 PM – 9:00 AM CST ). - Delivery: Neatly formatted Excel/CSV files, direct database uploads, or automated AI-summarized alerts via Slack/Telegram. Stop struggling with limited scraping tools. A custom, AI-driven solution will be built that works for you. Contact today to discuss project requirements.

✔️ My Expertise in Ecommerce Web Development ★ Programming: ➢ HTML ➢ CSS (Sass, Bootstrap, Materialize, Tailwind) ➢ JavaScript (jQuery, Vue, React, Electron) ➢ PHP (Symfony - Twig | Smarty) ➢ SQL (MySQL, MariaDB, SQLite) ➢ Python (Flask) ★ CMS: ➢ PrestaShop (Addons - Modules, Themes, Mail, API) ➢ WordPress (WooCommerce) ➢ Shopify ★ Management: Website (Front-end, Back-end), Product (Sourcing, Listing) ★ Migration: PrestaShop 1.5 to 1.6 to 1.7 to Latest Version ★ SEO: On-Page (Schema Markup), Off-Page (Link Building) ★ Server: Linux (Apache, Node, Python), AWS (EC2, Lambda) ★ Analytics: Google Analytics, SimilarWeb Pro ★ Tools: Docker, Webpack, Figma, GitHub ✔️ My Expertise in Web Data Extraction ★ Extraction: Website Data, Ecommerce Listing, Social Media, Pdf Files ★ Transformation: Parsing, Scraping, Cleansing, Formatting ★ Load: Spreadsheet, Excel, XLS, CSV, JSON, XML, SQL ★ Automation: Scraper, Miner, Crawler, Spider, Bot ★ Scripting: Python (Beautiful Soup, Scrapy, Selenium), C# (Windows App) # 100% valid work # Great team support for backup # Custom solution to all types of business niche # Organized, efficient, responsive, and always ready to co-operate!