Hello everybody Thank you for visiting my profile. I've spent 20+ years working in Microsoft Access Database Application Development and Data Migration Projects since 90's till now. My Experience included the following activities: - Analysis, classification and Attributes' identification for Documents/Data sets from different sources and integrating them all into the database. -Databases Construction (Tables, Forms, Queries, Reports, Macros & VB Modules) - Attribute Mapping and Reformatting legacy data sets prior to importing it into new database. - C Shell & VBA Loader Scripts to import multiple external files to multiple tables. - VBA and PL/ SQL to Export Data from Database tables to external custom text files. - Export data to mapping software (ArcGIS / Zmap Plus, CPS/PC) in the required formats. - Reformat / Load Spatial Data into ArcView/Arc Map & construct GIS Shape Files - Map Image Digitizing/Georeferencing using ArcGIS - Using OCR techniques to transcribe scanned paper documents into Word, Excel , PowerPoint, or Other Databases. PROGRAMMING EXPERIENCE - Flagstaff Engineering (9 track tape interface). - MS FORTRAN - MS C - VAX FORTRAN. - Visual Basic - IBM - EZVU-II . - R:BASE 5000 & R:BASE FORTRAN Program Interface (FORPI). - db_Vista 2.21 (network model DBMS designed exclusively for use with C applications) - Clipper 5.01 - FoxProw for Windows - Access 2.0, 97, 2000, 2003 - 2019 - Oracle PL/SQL - Arcview 3.0b under Unix Avenu Scripting - C shell Programming (Unix)

I have Expert-Vetted Talent (EVT) badge - it's Upwork's top 1% freelancers — pre-screened by Upwork Talent Managers and experts in their field. Out of ~30 million programmers worldwide, only a few thousand know Algorithms & Data Structures better than I do, which is proven by programming competitions. Please, contact me if you need that skill level (top 0.01%). I can do algorithmic/performance work in C/C++, Python, SQL, Java, MQL4, MQL5, C#, Assembly, JavaScript, Julia, Rust, and probably other languages - learning them rapidly. I also work with AI, mostly in NLP and NLU: large language models including OpenAI GPT-3, Bloom, BloomZ, GPT-J 6B, LLaMA, Alpaca, etc.; HuggingFace Transformers, Accelerate; Petals, Deepspeed, zfp/zfpy; CUDA, CPU, and MPS (AArch 64 M2 MacOS Metal GPU) backends. I have some work experience with Apple Neural Engine (ANE). In AI, I also worked with XGBoost for predictions (including trading), LibSVM, TensorFlow, PyTorch, Scikit-learn, etc. I have the hardware in my home office for training and inference with large language models and other AI. English: C1 (Grammarly plugin says I use more unique words than 95% of other users, native speakers included). Polish: B1 (86%). Russian, Belarusian: Native. - With unique skills in Algorithms & Data Structures, I improve programs asymptotically (often 100 or more times on large input data). - 29 years of programming (started Basic and assembler on ZX Spectrum), 24 years of C/C++, 16 years of commercial work experience + 3 years of research projects. - Contributed to widely used Open Source projects: LLVM/Clang (my contribution is XRay profiler on ARM32 and AArch64 systems), Katana Graph (multiple small contributions mostly driven by the proprietary part where I do GPU/CUDA), CBMC "C Bounds Model Checking" (I contributed parallelized output of DIMACS formatted Boolean Satisfiability formula), oatpp (C++ web framework, I contributed bug-fixes), OWL (OptiX Wrapper Library, I contributed build fixes for Ubuntu), Galois (research project for distributed computations on graphs, I contributed GPU improvements) - Actively participated in bug reporting and reproduction (for NVIDIA CUDA, Cadical&kissat boolean satisfiability solver, JBOSS, MariaDB, Tensorflow, Linux, etc) - Led several open-source projects of my own: ProbQA (a video game recommendation system based on a high-performance Bayesian inference engine with CUDA, SIMD, and multi-threading); InSoAr (automatic reconstruction of software architecture from source code ), a multi-threaded Boolean Satisfiability solver, etc. Working for hire, implemented: - efficient multi-threading, scaling real-world workloads almost linearly with the number of CPU cores (128x for AMD Ryzen Threadripper 3990X) - SIMD vectorization (SSE/AVX), up to 8x improvement in computing thread or even copying (see my "Faster alternatives to memcpy" answer on Stackoverflow, URL upon request). - cache-aware algorithms: up to 50x improvement on some workloads - up to 20 trillion operations/second in CUDA (thousands of times faster than CPU) - up to the theoretical limit (6.8 Gigarays/second on RTX 2080 laptop GPU) in ray-tracing with OWL and OptiX - AVX512 and RTM (Restricted Transactional Memory) based acceleration, 16x improvement for float numbers -up to 20x improvements to cryptocurrency miners on CPU using AVX512 and cache-friendly algorithms - crypto-miners for Ethereum, Bittensor, Qubic 15K reputation on Stackoverflow: (1915854/serge-rogatch) Topcoder SRM score: 1480 - among top 5K programmers in the world - top 0.02% (rSerge) I developed all kinds of networking applications, from Linux Kernel modules up to Web applications. The majority of work was, of course, done at TCP/IP level with socket calls like send/recv/select. Programming languages: C++, C++11/14/17/20, C, Python, x86/x64/ARM/AArch64 assembly, SQL, C# .NET, JavaScript, HTML, CSS, Java, MQL4, MQL5, XML, Cypher, Rust. Libraries/Frameworks: PyTorch, Tensorflow, HuggingFace Transformers/Accelerate/Safetensors, Hivemind/Petals, OpenAI, tiktoken, Django, Flask, STL, LibSVM, XGBoost, libcurl, Selenium, PyTorch, Transformers. Technologies: OpenMP, CUDA, SIMD (AVX&SSE, RTM), Linux Kernel Modules, OptiX/OWL, RTX, raytracing. Theory/Principles/Know-how/Methodologies: Algorithms & Data Structures, Performance Optimization, Artificial Intelligence, Multithreading, Vectorization, OOP, Low-latency, High-frequency, Blockchain. Open source code: Clang, LLVM, LLVM's compiler-rt library, Linux Kernel, a few of my own repositories, contributions to AI and Algorithm open-source projects such as Petals and CBMC. Tools/APIs/Architectures/Platforms: PostgreSQL, MSSQL, MySQL, Neo4j, MATLAB, CMake, GIT, MT4, MetaTrader 5, Conda, PyCharm. Virtual Machines / Containers: Docker, VMWare, VirtualBox, QEmu, Hyper-V. OSes: Windows, Linux, Android, macOS

I’m a Senior Database Administrator with 10+ years of professional experience, primarily focused on Microsoft SQL Server — including administration, optimization, configuration, and development. Throughout my career, I've worked on a wide range of projects such as: - Database development & administration - High availability and disaster recovery (HA/DR) design & implementation - Multi-database server consolidation and migration projects My core expertise is in SQL Server and Azure SQL, but I’ve also provided administrative support for MySQL and MongoDB systems in various environments. Additionally, I have experience in ETL workflows, especially with SSIS and Informatica for enterprise-scale data pipelines. 🔧 Key Responsibilities & Skills: - Backup strategies and maintenance routines - Performance tuning: query optimization, indexing, partitioning, and stored procedure tuning - High availability solutions: AlwaysOn, failover clustering, log shipping, replication - User access control, security auditing, and compliance - Troubleshooting and root cause analysis at both server and query level 📦 Databases & Tools: - Microsoft SQL Server - Azure SQL - MySQL - MongoDB - SSIS If you're looking for a reliable and detail-oriented database expert who understands both infrastructure and business needs, I’d be happy to help.

🏆 Unlock Your Business Potential with Custom Solutions I am a Full Stack Developer with 12 years of experience delivering end-to-end solutions that drive efficiency and growth. My expertise spans: • Custom ERP & SaaS Systems: Streamlining complex workflows with tailored solutions. • Automation Tools: Eliminating repetitive manual tasks to save time and reduce errors. • Advanced Reporting: Building insightful dashboards and data visualization tools for better decision-making. • CRM Development: Creating scalable systems that improve client engagement and relationship management. • Database Architecture: Designing secure, optimized databases to support long-term performance. Over the years, I’ve partnered with businesses of all sizes, individuals, and non-profits to transform ideas into reliable, scalable software solutions. If you’re looking for a developer who can understand your unique requirements, help brainstorm practical solutions, and deliver high-quality results, I’d be happy to connect and discuss your project. ◪ Technologies: PHP, Vue, RESTful API, Javascript, SQL, HTML, CSS and ElasticSearch (ELK stack) ◪ Frameworks: Laravel, Vuetify, PrimeVue, Tailwind, jQuery, Bootstrap, Zend, Angular ◪ Databases: MySQL, MariaDB, PostgreSQL, SQL Server, Oracle ◪ Server environments: AWS, Apache, Ubuntu, CentOS, DigitalOcean ◪ Versioning Tools: GitHub, BitBucket

Dear returning and new clients, I wish you all a warm welcome. You are just a message, away to boost your business with: ✔️ BACKEND web development problem and issue solving, ✔️ DATABASE querying and administration, ✔️ GUARANTEED A+ code quality following industry standards, ✔️ FAST and RELIABLE delivery and communication on AGREED tasks, ✔️ A RELIABLE and TRUSTWORTHY project manager who meets the client's reasonable deadlines. I am absolutely thrilled to help and guide you in IT technical sphere the best way I know (if you have time, you can also check short intro YouTube video here on my upWork profile, Thank you). I am FULL TIME freelancer with the set of skills, outlined by my clients: ✔️ PERFECT FEEDBACK SCORE (5.0) on ALL contracts AND 100% JOB SUCCESS - for more than a decade on upWork | Elance | oDesk, ✔️ upWork's TOP RATED FREELANCER BADGE since the start of their program, ✔️ POSITIVE attitude in RESOLVING conflicts and HANDLING glitches, ✔️ LIGHTNING fast replies and communication. DEVELOPMENT rules: - I write CLEAN and TESTABLE code, - write TESTS, so I am certain it does NOT break anything (if this is clearly communicated with client, I definitely encourage it highly), - CODE must be ready to DEPLOY at ANY TIME (CURRENT version must be in a WORKING state), - ALWAYS use GIT and BRANCHING, - SEPARATE ENVIRONMENTS for production, staging and local development, - use and TRACK PROGRESS through Jira, Trello, Asana and etc. - CLEAR AND CLEAN COMMUNICATION is an absolute MUST so the DEADLINES are met. For more please be sure to check feedback's, here on my profile page. Thank you in advance for dedicating your valuable time to me. --- BackEnd Web development: - PHP and frameworks - Laravel FrontEnd Web development: Jquery and Frameworks, CSS3, HTML5, Bootstrap, Vue Databases (development and administration): MySQL, MariaDB, MsSQL, PgSQL Amazon Web Services (AWS) Suite - EC2, S3, RDBMS Version control: - GIT - Bitbucket, GitHub - SVN - Tortoise SVN Linux - Ubuntu, CentOS7, Suse, Puppy - Bash Scripts - Docker -

🚀 E-commerce Solutions Architect Ready to Elevate Your Online Business 🚀 Seeking to transform your e-commerce vision into a thriving online presence? I'm Kulvir, a seasoned e-commerce developer and architect with 12+ years of experience crafting bespoke solutions across multiple platforms. I specialize in building captivating and high-converting online stores tailored to your unique business needs. 🛠️ Services Offered 🛠️ 🔹 E-commerce Platform Selection & Consultation (BigCommerce, Magento 1.9 & 2.0, Shopify, Shopify Plus, WooCommerce) 🔹 Custom Theme Development & Responsive Design (Optimized for all devices) 🔹 Platform Migrations & Upgrades (Seamlessly transition your existing store) 🔹 App & Plugin Integration & Customization (Enhance functionality and user experience) 🔹 Custom API Integrations (Connect your store to external systems) 🔹 Payment Gateway Setup & Optimization (Streamline checkout processes) 🔹 Search Engine Optimization (SEO) & Marketing Support (Boost online visibility) 🔹 Conversion Rate Optimization (CRO) Strategies (Maximize sales and revenue) 🔹 Performance Optimization & Security Audits (Ensure a fast and secure online store) 🔹 Ongoing Support, Maintenance & Training (Empowering you to manage your store effectively) 🔹 Shopify App Development (Extend the capabilities of Shopify stores) 🔥 Why Choose Me? 🔥 ✅ Multi-Platform Expertise: I'm proficient across leading e-commerce platforms, including BigCommerce, Magento (1.9 & 2.0), Shopify, Shopify Plus, and WooCommerce. This allows me to recommend and implement the best solution for your specific requirements. ✅ Design-Focused Approach: I believe that aesthetics and functionality go hand in hand. I create visually appealing and user-friendly storefronts that reflect your brand identity and drive conversions. ✅ Performance-Driven Development: I prioritize performance optimization to ensure your store loads quickly and provides a smooth shopping experience across all devices. This includes mobile responsiveness and cross-browser compatibility. ✅ Client-Centric Collaboration: I work closely with you throughout the development process, from initial consultation to post-launch support. Your satisfaction is my top priority. ✅ Results-Oriented Strategies: My focus is on delivering measurable results. I leverage data-driven insights and industry best practices to optimize your store for conversions and maximize your return on investment. Ready to take your e-commerce venture to the next level? Let's discuss your project and explore how I can help you achieve your online business goals. Contact me today to start building your e-commerce success story! Cheers, Kulvir

With almost 15+ years of experience in DB development, administration and Data Engineering in the competitive IT environment of with a well-known It organizations like TRG, Financial institute (Askari Leasing Ltd, Pakistan) and then with a software house (Valentia technologies / F3 Technologies) with an international repute, I am much comfortable and confident at the same time to take the challenges of SQL Server traditional as well as out-of-the-box Administration, Development and Data Engineering along with the BI stack and Big Data.  I have successfully deployed many projects as a key database, Data Engineering and multiple SSAS, ADF, Synapse and PowerBI projects to the clients in Dubai and Ireland related to Healthcare and finance. All projects were developed either by me or under my leadership. Writing complex queries, stored procedures, Functions and triggers have been the part of my job. Grip on Service Broker for real Time data synchronization adds to my capabilities to tackle the up-coming challenges with the data.  In Administration, I have successfully implemented many High Availability solutions like SQL Server Fail over Clusters, AlwaysOn Availability Groups, Database Mirroring and Log Shipping.  Experience in working on both Waterfall and Agile development model. Maintaining project backlogs, writing and story pointing of user stories, and maintain the velocity of the team are my specialties. Changes in my roles is the big sign that I am always open for learning new things and enjoy learning new technologies. I have recently completed my training course on Python and machine learning with Python. Skillset includes SQL Server Development and administration, MySQL development, SSRS, SSAS, SSIS, Power BI and Python for Data Engineering and Machine Learning. Technical skills include; MS Fabric (DP-700 certified) Azure Data Fundamentals (DP-900 certified) MCSA - SQL Server 2012 MCITP - Database Developer 2008 MCITP - BI Developer 2008 SQL Server Database Performance Expert Azure Data Factory, BLOB, Data Lake and much more Azure Synapse Python DataBricks AWS Glue, EC2, S3, Athena, RedShift and much more AWS RDS PowerShell PowerQuery Design, Optimize and Secure Cubes in SSAS Design and Deploy optimized subscription based reports Integration Services for ETL and Maintenance Plans Data Synchronization using Service Broker High Availability Solutions with Windows Server Failover Clustering and AlwaysOn DR planning Database Mirroring (SQL Server 2005 / 2008 R2) Query writing and Query Optimization

I have multiple publications in machine learning (neural networks, fuzzy logic) where applications have been created and tested in languages such as python and sql. Professional experiences involve a variety of data manipulations and reporting in sql, python and vba (excel). My professional passion lies in mathematics, data science, machine learning and AI, but I also enjoy routine data manipulation and transformation. I would encourage you to review my previous jobs here on Upwork for more details on my capabilities.

I'm an Expert Software developer with 11+ years of experience developing desktop software, websites, and ERPs in ASP.NET, VB.NET, C#, VB6, and ASP.net MVC technologies. During my career, I helped many small, medium, and enterprise organizations to develop ERPs, Software that helps them to make business more productive. Previously I have developed applications like Inventory Management, ERP, CRM, Insurance Management, Client Management Application, POS Applications with Offline & Online, School Management systems, Library Management, Payroll Software, Retail Management, Retail POS systems, Task Management systems, Travel Agent Management Software, Farming ERP, Retail ERP, Lead Management, Insurance Claim Management, Cloud Storage Applications, and many more custom software. * Technical Proficiency: - .Net, including C#, VB.NET, ASP.NET (MVC, Web Forms, and Winforms), Web API 2, LINQ,.Net Windows Forms, WPF. - Anything SQL Server and T-SQL, including writing stored procedures, triggers, functions, jobs, indexes, full-text search, query optimization, database design, setup, backup, import, export, administration, and maintenance. - Other databases like Oracle, MySQL PostgreSQL, SQLite, MS Access - Angular, ReactJS, KnockoutJS, KendoUI, JavaScript, jQuery, Bootstrap, Ajax - CSS, HTML5, Responsive Design - Regular Expressions in general and its implementation in .Net or JavaScript - VBA, VB6 - Crystal Reports, Active Reports - Source controls, git, GitHub, BitBucket, TFS, SVN (Subversion), Source Safe - Third-party Controls: DevExpress, Rad Controls, DotnetBar Controls & Metro Framework Experience in various payment gateway integrations like Stripe, Stripe SCA, Authorize.Net, PP, and First Data. I have experience in repositories like GitHub and BitBucket. As a Project management tool, I have used Jira, Asana, and Basecamp. Further, I have experience working with TFS & VSS. Thank you for taking the time to review my profile

With 6+ years of experience as a Data Engineer & AI Specialist, I design ETL/ELT pipelines, AI-driven analytics, and scalable cloud solutions that transform raw data into intelligence. I work across AWS, GCP, Azure, and Snowflake to deliver data engineering, AI automation, and real-time analytics for industries like fintech, real estate, and SaaS. From AI-powered RAG pipelines to enterprise-scale data warehouses, I create solutions that are robust, cost-efficient, and production-ready. 🧠 Generative AI & Machine Learning LLMs: OpenAI (GPT-4o), Gemini, Claude, LLaMA, Hugging Face, LangChain, LlamaIndex RAG Pipelines & Vector Databases: Pinecone, FAISS, Weaviate AI Tools: Prompt Engineering, Fine-Tuning, Model Deployment, MLflow, TensorFlow, PyTorch NLP & Forecasting: Topic modeling, Churn prediction, Real-time analytics ⚙️ Data Engineering & Pipelines Orchestration & ELT: Airflow, DBT, Dagster, Prefect, Fivetran, Airbyte, Meltano, dlt ETL / Data Pipelines: Python, SQL, Spark, Dask, Pandas, NumPy Data Warehousing: Snowflake, BigQuery, Redshift, Databricks, Delta Lake, DuckDB APIs & Automation: FastAPI, Flask, REST APIs, Web Scraping, API Integrations Scraping & Data Extraction: Scrapy, Selenium, Playwright, BeautifulSoup, Cloudflare Bypass, Proxy Rotation 📊 Data Visualization & Analytics Tableau, Looker, Power BI, Google Data Studio, QuickSight, Plotly, Dash, Seaborn, Matplotlib Real-time dashboards & business intelligence for decision-making ☁️ Cloud & DevOps AWS: Lambda, Glue, Athena, S3, Redshift GCP: BigQuery, Dataflow, Cloud Run, Vertex AI Azure: Data Factory, AI Services, Synapse Docker, CI/CD, Serverless, Cloud-native AI 🛠 Workflow Automation n8n, Make (Integromat), Zapier, Airtable, No-Code Data Engineering 🎯 Keywords (for Upwork SEO) Python, SQL, Python, Apache Spark, PySpark, Snowflake, Spark, BigQuery, Redshift, Databricks, Databricks Platform, Spark, ETL, ELT, DBT, Airflow, Prefect, Dagster, Fivetran, Airbyte, Meltano, MLflow, Hugging Face, TensorFlow, PyTorch, LLM, RAG, LangChain, Vector Databases, Pinecone, Weaviate, FAISS, NLP, Forecasting, Scrapy, Selenium, BeautifulSoup, Playwright, API Development, Web Scraping, Data Warehousing, Data Engineering, Automation, n8n, Make, No-Code Pipelines, Cloud Data Engineering, Database, API Integration, Data Analysis, Data Science, Database Architecture, AI Agent Development, AI App Development 🔖 Hashtags #DataEngineering #ETL #ELT #AIEngineering #LLM #GenerativeAI #Snowflake #BigQuery #Databricks #ApacheAirflow #DBT #RAG #LangChain #VectorDB #PythonDeveloper #APIAutomation #WorkflowAutomation #n8n #Make #NoCodeDataEngineering #MachineLearning #CloudData #Database #APIIntegration #DataAnalysis, #DataScience #ApacheSpark #Spark #AIDataEngineering #WorkflowAutomation #Snowflake #BigQuery #ApacheAirflow #PythonDeveloper #NoCodeDataEngineering #n8n #Make #dbt #PySp #DatabaseArchitecture #DatabricksPlatform #AIAgentDevelopment #AIAppDevelopment