I have 15+ years of experience in Software development, specialized in WinForms (.Net Framework using C# and VB.Net), Crystal Reports, DevExpress Toolkit, and Database (Oracle, SQL) development. Consumed and Created WebService and Consumed various external WepAPI
I also have extensive knowledge of Oracle Development using Oracle Forms & Reports and also done customised configuration and manage Oracle Application Server, I work as a independent developer and having critical problem solving skils,
I have completed many projects for Desktop Applicaton and Database projects and PL/Sql scripting, like ERP system at Manufacturing level unit,Financial Accounting System, Inventory Management, Windows System Utilities, Business Analytic Reporting and many more. I also have intermediate knowledge in Oracle and SQL Database management, like installation, TABLESPACES, MEMORY ALLOCATION, USER MANAGEMENT, JOB SCHEDULE etc.
I have excellent troubleshooting and debugging skills developed over the years of development work.
I am a patient, thorough person with high attention to detail. I can provide consulting. software development, testing/debugging and other services ranging from short one-hour jobs, to full-time every day work, to long-term cooperation and support.
Oracle Forms
Oracle Database
C#
VB.NET
.NET Framework
Desktop Application
Oracle Reports
DevExpress
SAP Crystal Reports
Oracle PLSQL
Microsoft SQL Server
Database Design
Nayan G.
Surat, India
$25/hr
5.0
19 jobs
⭐⭐⭐⭐⭐ Top Rated | Senior .NET Desktop, ASP.NET Core, SQL Server, QuickBooks & SAP Crystal Reports Expert | 10+ Years
I help businesses build, modernize, and optimize desktop applications, web systems, databases, and reporting solutions using Microsoft technologies. With over 10 years of experience, I've delivered enterprise software for manufacturers, wholesalers, accounting firms, and service businesses worldwide.
I specialize in solving complex technical challenges—from fixing slow applications and optimizing SQL Server databases to integrating QuickBooks Desktop, developing SAP Business One Crystal Reports, and building complete ERP solutions. Whether you're starting a new project or maintaining a legacy system, I focus on clean architecture, performance, and long-term maintainability.
🔹 Core Expertise
Desktop Development
• C & VB.NET WinForms
• DevExpress UI
• Windows Services
• Multi-threaded Applications
• Modern Windows 11 UI
• Desktop Performance Optimization
Web Development
• ASP.NET Core
• RESTful Web APIs
• Third-party API Integrations
• OAuth Authentication
• JSON & XML Processing
Database Development
• Microsoft SQL Server
• T-SQL
• Stored Procedures
• Performance Tuning
• Query Optimization
• Index Optimization
• Database Design
• Data Migration
• Import & Export Automation
SAP Business One & Crystal Reports
I have developed hundreds of Crystal Reports for SAP Business One, including:
• Sales Orders
• Purchase Orders
• A/R & A/P Invoices
• Delivery Notes
• Inventory Reports
• Production Reports
• Financial Reports
• Customer Statements
• Aging Reports
• Barcode Labels
• Custom Business Reports
I also specialize in:
• PLD to Crystal Report Conversion
• Crystal Report Customization
• SQL-Based Reports
• Report Optimization
• Complex Formulas
• Parameters & Subreports
QuickBooks Desktop Integration
• QBFC SDK
• Customer Synchronization
• Order Synchronization
• Invoice Synchronization
• Inventory Synchronization
• Price Updates
• Windows Background Services
• Custom Accounting Integrations
ERP & Business Automation
• Inventory Management
• ERP Development
• Workflow Automation
• Business Process Automation
• Dashboard Development
• Reporting Solutions
Hardware Integration
• Serial Port (RS232/RS485)
• Bluetooth Communication
• Industrial Equipment
• Machine Automation
• Real-time Monitoring Systems
Legacy Modernization
• VBA to .NET Migration
• Excel Macro Conversion
• Legacy Application Refactoring
• Desktop Application Upgrades
🔹 Recent Projects
✔ Developed a complete ERP solution for the diamond industry handling high-volume daily transactions.
✔ Designed and developed hundreds of SAP Business One Crystal Reports and converted numerous PLD reports into Crystal Reports.
✔ Built an unattended QuickBooks Desktop synchronization application using the QBFC SDK to automatically synchronize customers, orders, invoices, inventory, and pricing.
✔ Developed a real-time manufacturing dashboard monitoring production across 15+ plants.
✔ Implemented a fully compliant Saudi Arabia ZATCA Phase 2 e-invoicing solution.
✔ Built coffee roaster control software integrating hardware through Serial Port and Bluetooth communication.
✔ Developed an automatic desktop application updater with database migration support.
✔ Migrated legacy Excel/VBA business systems into scalable .NET desktop applications.
🔹 Why Clients Hire Me
✔ 10+ years of professional experience
✔ Top Rated on Upwork
✔ Strong expertise across Desktop, Web, Database, Reporting, and Enterprise Integration
✔ Clean, maintainable, and scalable code
✔ Fast problem diagnosis and performance optimization
✔ Direct communication with the developer doing the work
✔ Reliable delivery and long-term support
🔹 Technologies
Languages: C, VB.NET, SQL (T-SQL)
Desktop: WinForms, DevExpress
Web: ASP.NET Core, REST APIs
Database: Microsoft SQL Server
Reporting: SAP Business One, Crystal Reports, RDLC
Accounting: QuickBooks Desktop (QBFC SDK)
Other: REST APIs, JSON, XML, OAuth, Windows Services, Barcode Systems, Serial Communication, Bluetooth, VBA Modernization
📩 If you're looking for a developer who can build, optimize, or modernize your desktop application, SQL Server database, Crystal Reports, QuickBooks integration, or ERP system, I'd be happy to discuss your project. Send me a message, and let's build a reliable solution that scales with your business.
Desktop Application
Windows Forms
SQL
VB.NET
Desktop Application Bug Fix
C#
Microsoft SQL Server
DevExpress
Windows App Development
SAP Crystal Reports
Microsoft Windows
.NET Framework
Microsoft Visual Studio
Software Consultation
QuickBooks Online API
API Integration
SQL Programming
Full-Stack Development
QuickBooks Enterprise
API Development
Kishankumar K.
Surat, India
$25/hr
5.0
30 jobs
Greetings!
I’m Kishan Kalathiya, a seasoned developer and database expert with over nine years of experience in creating tailored solutions for businesses.
My Expertise:
Web and Desktop Application Development
ASP.NET, MVC, C#.NET, VB.NET
Database Administration (MSSQL Server)
Database Design, Query Optimization, Stored Procedures, Functions, and Triggers
Custom Reporting Solutions
SSRS Report Design (RDL and RDLC)
SAP Crystal Reports
Web Development & Scripting
PHP, WordPress, Python Scripting
Advanced UI/UX Tools
DevExpress, Infragistics, Telerik, Stimulsoft, and more
Graphic Design
Clean, user-friendly, and professional designs
Why Choose Me?
Client-Focused Approach: I prioritize understanding your requirements to ensure 100% accuracy and satisfaction.
Expert Guidance: I offer insights and suggestions to enhance your project, delivering results that exceed expectations.
Reliability: My solutions are robust, scalable, and built using best practices in object-oriented programming (OOP).
Efficiency: I develop applications that are fast, cost-effective, and highly dependable.
"Runs Faster, Costs Less, and Never Breaks!"
My Qualifications & Experience:
Education:
Bachelor of Computer Applications (BCA)
Professional Experience:
Over nine years in developing desktop and web applications using C#.NET, VB.NET, MSSQL, MS Access, and Excel databases.
Six+ years as a freelance developer, successfully delivering hundreds of desktop applications and numerous web-based solutions.
Key Projects Delivered:
Diamond ERP
Custom CRM for Advocates
Stock Management Systems
Accounting Systems
Various other enterprise and small-scale applications
I am proficient in using DevExpress, Telerik, Stimulsoft, and other advanced tools to create exceptional user experiences.
Let’s Get Started!
Have a project in mind? Feel free to send me an invite, and I’ll respond promptly. Together, we’ll turn your ideas into reality!
Thanks & Regards,
Kishan Kalathiya
Microsoft Windows
MySQL
C#
Microsoft SQL Server Reporting Services
HTML
SAP Crystal Reports
SQL Programming
SQL Server Integration Services
Data Visualization
DevExpress
SQL
PHP
Microsoft SQL Server Administration
SQL Server Reporting Services
ASP.NET
ANKIT C.
Surat, India
$15/hr
4.8
13 jobs
I'm working on Oracle Technologies since 4 Years, and during that time span I've successfully implemented many projects on Client site and also has working experience on Linux and Windows based environment.
I've experience of working on:
Oracle Forms (6i, 9i, 10g, 11g)
Oracle Reports (6i, 9i, 10g, 11g)
Oracle Database (11g)
Oracle PL\SQL
Stored Procedures
Functions
Triggers, etc.
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