Data Engineer From 2021 till date - to design, develop, and maintain scalable data pipelines and workflows using Python/Perl, MySQL, Flask API - to integrate data from multiple sources into data warehouses and lakes, ensuring quality and consistency; - to monitor, troubleshoot, and optimize data workflows and ETL processes; - to collaborate with analysts, engineers, and product teams to understand data requirements and implement solutions; - to ensure data security, compliance, and governance standards are met; - to participate in code reviews and maintain high engineering standards; - to stay current with emerging data engineering technologies and recommend improvements to enhance data platform quality and scalability. Website Developer - 2011 to 2017 Perl CGI developer in a UK based company. Data Scraper - 2019 till date working as a part time consistent data scraper using Perl techniques

Freelance programmer, bachelor of Computer Science, with several decades of programming experience (since 1999), from backend programming (Perl, PHP, nodejs) to front end (HTML/js/ts). Main strengths: - vast area of expertise, from backend to frontend programming using several platforms and their combinations. - fast turnaround (usually same day - if I available - free from current tasks). Flexible in times and terms. - long term support for completed projects (one month free tech support including small design fixes, free bug fixes ) Main skills for now: - Building a browser based web apps on React, Vue js , Angular, mainly visualization oriented projects - 2d,3d, force graphs, tree graphs, complex combined graphs, dashboards...many more) - using mainly D3.js and Three.js. Over 8 years of experience with over 100 completed projects in this area (some are available online, some shown as screenshots) - backend programming (Perl, PHP), with common stacks (Apache and other web servers, Mysql, SQlite, PostgreSQL, MongoDB, NoSQL and some other dbs). - over 15 years of experience (past years) Have some experience working on multi-platform desktop software applications (using Qt library, targeted more for Linux platform). I use AI where this is justified way and helps to speed up development. Also can help fixing various AI generated errors and problems in code.

I have more than 14+ years of experience, I build software solutions for Hospitality, Education, Healthcare, E-commerce, and Enterprise clients — including several multi-tenant SaaS platforms I've architected and scaled from the ground up. I have hands-on experience building SaaS products end-to-end: multi-tenant architecture, subscription and billing systems, role-based access control, usage metering, and scalable cloud infrastructure. I've helped startups take products from MVP to production-ready SaaS platforms, and helped established businesses modernize legacy systems into subscription-based offerings. My expertise includes Property Management Systems (PMS), Channel Managers, Booking Engines, OTA Integrations, Price Comparison Engines, Reservation Systems, School Management Systems, Healthcare Management Platforms, and E-commerce Synchronization Solutions, API development/implementation and Backend process management. I have strong experience in API Development, API Architecture, and Third-Party Integrations.

🏆 Top Rated Plus (Top 1% Upwork talent) ☕ Started working as web developer in 1999 🔥 Expertise in front-end, back-end, and server administration 🔐Always keeping in mind security and productivity aspects 🎓Master and bachelor degrees in computer science Let's make your project successful! 🚀🚀🚀

Expert in relational database systems, especially PostgreSQL (Supabase, Amazon Aurora/RDS, Azure Hyperscale/CosmosDB/Citus, postgREST, RPC, RLS, timescaledb, PostGIS), MS SQL Server, and MySQL, with more than 27 years of experience as a database architect, designer, developer, and administrator. I’m also a software developer with 37 years of experience in many platforms, programming languages, and database systems. Expert in all of the following: * database installation, configuration, optimisation, securitisation, backups, performance improvement, encryption. * database design, SQL code optimisation, indices optimisation, coding stored procedures, increasing performance and security, partitioning. * data quality, de-duplication, normalisation, AI-assisted enrichment. * single and multi-tenant systems, JWT authentication, RLS authorisation. * REST and RPC functions, Edge/Lambda functions, Webhooks, AI APIs, Realtime, migrations. * database conversion or migration (e.g. to/from noSQL or JSON stores), interfacing with other databases, importing and exporting data, interfacing with online services (pl/perl, C, C#) * hot/cold backup and restore, recovery, replication (master/slave or master/master), mission critical * encryption in transit and/or at rest; encryption of data for authorised access only * text-file data extraction, formatting, conversion, archival, clean-up. Databases: PostgreSQL, SQL Server, MySQL, D3/Pick, Oracle, NexusDB, DB2, SQLite, COBOL, MongoDB, BerkeleyDB, Informix, Access, InterBase, Paradox, DBase/Clipper/Fox (DBF), CSV and plain text. Expertise with UAT/development/test environments, Regular Expressions (regex), batch and shell scripting, sed and other text processing tools, Excel, SOAP and web services, networking tools, and many programming languages (including Delphi, C/C++/C#, Perl, PHP, Smalltalk, Java, JavaScript, Python, and more). I can provide training and consultancy.

A Techno commercial professional working as a Senior Business Development Manager. Responsibility includes collaborating with the clients to gather the business specifications, improving the scope in terms of technicality and user experience by offering suggestions on scope and latest technologies and furnishing clients with all required information about the services offered, my area of expertise, the processes being followed and all other required information related to the project to help make clients an informed decision Open Source: PHP 5, PHP 4, CGI/Perl (Mod_perl/ ActivePerl/ ePerl), Python, Moodle IPhone, Mobile & Handhelds: Apple iPhone development using Xcode and Objective C, Blackberry, Google Android, Microsoft Windows Mobile, J2ME platform CLDC1.1, MIDP1.0, MIDP2.0, Windows7 Phone, Android tablet, Blackberry Playbook. Microsoft Technologies: C#, VB.NET, Visual Studio .Net 2003 / 2005/ 2008, SharePoint services 3.0, MOSS 2007, MOSS 2010, ASP, ISAPI/NSAPI, ASP.NET 1.1/ 2.0 / 3.0 / 3.5. Crystal Reports, SQL Reporting, Microsoft Azure, Silverlight, Microsoft Office Live. Frameworks & CMS: Moodle, Magento, Joomla, Drupal, WordPress, CakePHP, Zend, Symphony, CodeIgniter, OSCommerce, DotNetNuke, ASPDOTNETSTOREFRONT, BVCommerce, CheeryPy, Django, Zope, Plone, Movable Type, CMS Made Simple, TYPO3, CREloaded,Zen Cart,Xcart, Big Commerce, Rainworkx,Sugar CRM,Vtiger. Internet Marketing: Search Engine Optimization, Pay per Click Management, Social Media Marketing, Brand Reputation Management, Social Network Marketing, Content Copywriting, Link Popularity Development and SEO Consultancy for under development sites and portals. Flash & FLEX: Adobe Flash CS4, Adobe Flex, Flash Action scripting (AS 3.0), Flash Gaming, Flash Media Server, Flash Remoting, Rich Internet Applications (RIA), Adobe AIR. User Interface / Graphic Design: Adobe Photoshop, Image Ready, Flash, CorelDraw, Adobe AfterEffects, Fireworks, HTML, XHTML, Dreamweaver. Databases:Oracle, Sybase, MS SQL Server 2000 / SQL 2005 / SQL 2008, MS Access, Postgresql, MySQL 4.x/5.x, NoSQL. Operating Systems: Windows 2003/2008 .NET Server, Linux , Unix, Windows 95, Windows 98, Win ME/XP and Windows NT/2000. WebServer: IIS, Apache, RedHatSecure. Cloud Servers: Amazon EC2, Windows Azure. Third Party APIs: Foursquare, Dimdim, Google Maps, Flickr, Slideshare, Twitter, Facebook, LinkedIN. Miscellaneous: AJAX, XML, JavaScript, Application development for Facebook and Twitter, PayPal integration, Google checkout and other Payment Gateway integration, Database Administration.

Innovative, passionate, and quick software developer and architect with deep knowledge of programming concepts and internals. 24+ years of hands-on industry experience in programming, designing, managing, & leading software projects & companies. Change agent, problem solver with a passion for technology; skilled in grasping the big picture, conceptualizing, developing & implementing solutions by partnering closely with business leaders. Worked for different type of industries, which includes Health-care Informatics, Lab Informatics, MOOC, Online Education, ERPs, Electronic Design Automation (EDA), Semi Conductor, Heavy mechanical manufacturing, Travel, Pharmaceutical & e-commerce. Skilled in: AI Agents | AI Voice Agents | AI Automation | AI Solutions | Specialized Local Custom AI Models Python | PHP | Apex | Objective C | Java | C/C++ | Flex | ActionScript | JavaScript | Perl | VB6 iPhone SDK | Android SDK | BlackBerry SDK | Flex SDK | Sancha Django | Django REST | Odoo | Web2Py | Zope | Plone | Open edX | CodeIgniter | .NET | Java EE SQL Server | MySQL | PostgreSQL | Sybase | DB2 | SQLite | MS Access Odoo | OpenERP | Salesforce CRM | MS SharePoint git | SVN | CVS | VSS | Unfuddle Scrum | UP | UML | CASE Tools | Poseidon | Rambaugh OMT ASP.NET | ASP | Telerik Visual C++| MFC | Win32 | COM | DCOM | OLE | Multithreading ANT | JDK | Digester| Struts | Servlets | JSP | EJB | WebSphere | Eclipse Web 2.0 | AJAX | CSS | XML | XSD OpenSource | github Knowledge Management | MediaWiki | PHP Health-care Informatics | ICD9 | ICD10 | HIPPA | HL7 SEMI Standards | EFEM | SEMI E87 | SEMI E90 | SEMI E40 | Robotics | SECS/GEM | SCADA Customs ERP | Landing Cost | HS Codes | WTO Standards Lab Informatics | Bika | OLiMS | LiMS | LIS Windows | MacOS | Linux | Ubuntu | Unix | EC2 Windows CE | Micro Controller Programming | Dynamic C

PHP / Core PHP / Custom PHP / CodeIgniter / Laravel / LAMP MySql / MariaDb / MongoDB / Neo4j Javascript / jQuery / Puppeteer / Node.js / Vue.js / React.js / Next.js / React Native Python / Django / Flask / Selenium HTML5 / CSS3 Stripe / Stripe Connect / Paypal / Quickbooks Online Airtable / Smartsheet OpenAI GPT-3 / DALL-E API IoT / MQTT Google Maps / ArcGis D3.js / Chart.js / Echarts / Highcharts / Google Charts / Plotly.js AWS Heroku Firebase GSuite / Google Apps Script / Google Cloud Platform / Google Cloud Functions / Google Cloud Firestore / Google Docs API / Google Sheets API / BigQuery Wix.com / Webflow / Hocoos / Low Code / No-Code / FlutterFlow Qualtrics / SurveyGizmo / Alchemer / SPSS Zapier / IFTTT / Integromat / Make.com / n8n Zoho CRM / Zoho Inventory / Zoho API / Zoho Creator Klaviyo / Pipedrive / Zendesk / Freshdesk / Reamaze / Gorgias / Neon CRM / Arengu / Customer.io / Smartlead / Instantly / EmailBison / GoHighLevel / HeyReach / Woodpecker ShipStation / Shopify Video.js / HLS.js / Dash.js / VAST DRM / Fairplay / Widevine / Playready Android / Java / XML / JSON iOS / ObjectiveC / CoreData / Push Notifications FlutterFlow Windows Powershell Perl / Ruby Facebook API / Twitter API / Tweepy / YouTube API / Instagram API / Mandrill API / Braintree Payments Bitcoin / Cryptocurrency Adobe Animate

25+ years building enterprise software where Python AI meets Java scale. 100+ full-stack systems delivered, 10M+ users supported, and real-time platforms processing millions of events - from AI/ML and automation to Spring Boot, APIs, cloud & modern web apps. 👋 Looking for a powerhouse full-stack engineer who can bridge Python-based AI innovation with Java-backed enterprise performance? I bring 25+ years of professional full stack software development experience-combining backend architecture, enterprise Java systems, AI/ML engineering, and modern frontend frameworks into scalable, data-rich applications for finance, healthcare, retail, manufacturing, and government sectors. With over 100 full-stack systems delivered, I've built mission-critical platforms and real-time analytics engines handling millions of events per day, while reducing operational costs by up to 65% through infrastructure optimization. 🏆 Why Work With Me? ✔️ 25+ years of enterprise-grade software development ✔️ 40+ Python projects using AI/ML for analytics, automation, and computer vision ✔️ 60+ Java systems modernized to Spring Boot, AWS & microservices ✔️ Built backend systems serving 10M+ users monthly ✔️ AI-based fraud detection systems with 98%+ accuracy ✔️ Scaled apps to handle 1M+ real-time events/second using Kafka, EventBridge, and Spark ✔️ Healthcare-grade imaging tools for tumor classification (TensorFlow + OpenCV) ✔️ 50+ legacy migrations from J2EE/Struts to microservices ✔️ Deployed full-stack apps across 20+ industries, including fintech, eCommerce, telecom, and eLearning ✔️ CI/CD pipelines & Dockerized monorepos for faster dev cycles and better team velocity 🧠 Tech Stack & Core Skills 🖥️ Languages: Python, Java, TypeScript, JavaScript, HTML5, CSS3, SQL, Shell Scripting 🧠 Python AI/ML & Automation: TensorFlow, PyTorch, OpenCV, Scikit-learn, NumPy, Pandas, Matplotlib AI Workflows | Computer Vision | Predictive Analytics | Data Pipelines | Image Recognition | Fraud Detection Automation using Python + Selenium, BeautifulSoup, Scrapy ☕ Java Enterprise Stack: Spring Boot, Spring Cloud, Hibernate, Akka, Play, Grails Java Microservices | RESTful APIs | SOAP | JMS | JPA | Quartz | Lombok Legacy Refactoring | J2EE → Spring Boot | Tomcat | WildFly | WebLogic 📊 Frontend (Full-stack Scope): Angular.js, Vue.js, React.js, Next.js, Svelte Tailwind, Bootstrap, Material-UI | JSP | Thymeleaf | JSF | EJS SPA Development | SSR/ISR | Responsive UI | Webpack, Vite, Gulp 📦 DevOps & Cloud: Docker, Kubernetes, AWS (Lambda, SageMaker, EC2, S3, Kinesis, RDS), GCP, Azure CI/CD: Jenkins, GitLab CI, Travis, Ansible, Terraform Infrastructure as Code | Monitoring | Cost Optimization 📚 Data & Databases: PostgreSQL, MySQL, Oracle, MSSQL, SQLite, MongoDB, Cassandra, Dynamo DB Elasticsearch, Redis, Kafka, RabbitMQ, GraphQL, REST APIs 📌 Python & AI-Focused Solutions 🔹 AI-Based Automation for Workflow Optimization 🔹 Real-Time Object Recognition & Computer Vision Systems 🔹 Predictive Analytics for Retail, Logistics, and Healthcare 🔹 NLP Chatbots and Intelligent Assistants 🔹 Data Crawlers & Scrapers for eCommerce & SEO 🔹 Data Normalization Pipelines Handling 1TB+ Datasets 📌 Java & Enterprise Software Development 🔹 Full-stack Java + Angular/Vue platforms 🔹 Spring Boot Microservices for Finance, Healthcare, SaaS 🔹 Event-Driven Architectures with Kafka & Redis 🔹 Secure Auth (JWT, OAuth2, LDAP, SSO, 2FA) 🔹 Migrating Monoliths to Microservices (Cloud-Native Refactors) 🔹 Server-Side Java with JSP, JSF, and Servlet APIs 📌 Full-stack Projects Built from Scratch 🔹 Inventory Management System (Java + Vue + AWS) 🔹 Medical Diagnosis Dashboard (Python + Django + React) 🔹 Financial Fraud Detection Engine (PyTorch + Kafka) 🔹 Real Estate Listing Platform (Flask + Angular + PostgreSQL) 🔹 ERP Extensions for Manufacturing (Spring Boot + Thymeleaf) 💬 Results That Matter ✅ Built an AI-based inventory forecasting engine reducing stock outs by 42% ✅ Scaled a Java backend to handle 5M+ daily requests for a logistics app ✅ Migrated 3 legacy apps to AWS with 65% infra cost reduction ✅ Automated scraping workflows gathering 10M+ data points weekly ✅ Designed OCR pipeline (Python + Tesseract) for medical record digitization ✅ Delivered HIPAA-compliant image analysis tools with 95%+ detection accuracy ✅ Cut fraud risk 75% for fintech app using real-time anomaly detection 💼 Industries Served 🏥 Healthcare & Diagnostics 💳 Fintech & Insurance 🛍️ eCommerce & Dropshipping 🏗️ Manufacturing & Supply Chain 📚 EdTech & LMS Platforms 🛰️ Gov & Aerospace (including secure environments) 🏢 Enterprise SaaS & Internal Tools Let’s build the next enterprise success story together. 💬 Message me to discuss your backend, AI/ML, or full-stack project! 🧩 Let’s Build Something Powerful If you’re seeking a seasoned backend + full-stack expert who can turn complex business logic into reliable, scalable, and secure digital solutions - I’m your guy.

My primary skill is web and desktop automation. Over the last 15 years, I have developed a wide range of applications using Python, PHP, C#, Google Apps Script, different APIs, frameworks, Zapier, Make etc. Most of my work is done using Python but I can work with Perl, C#, PHP, VBA, VB.NET too. Also I have worked a lot with Zapier and some of my workflows / zaps are really complex: including dozens of steps and different APIs / app. I have created several hundreds of web scrapers, spiders and different parsers (CSV, XML, XSLT, JSON, text logs etc). I can work with different database engines (MySQL, Postgres, MS SQL Server etc) and other output formats (CSV, Excel, XML, JSON). Usually my work starts with a simple (and free) demo version which my client can evaluate. My rates are not the cheapest but my code is really good and I'm always prioritize code quality over cost, resulting in robust and maintainable solutions.