Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get expert Delphi application development and modernization

Igor K.Status: Offline
Igor K. Igor K.
Preview image

Let a pro handle the details

Buy Custom Desktop Apps services from Igor, priced and ready to go.
Igor K.Status: Offline
Igor K. Igor K.
Preview image

Let a pro handle the details

Buy Custom Desktop Apps services from Igor, priced and ready to go.

Project details

You will get expert development, maintenance, and modernization for an existing Delphi application from a senior developer with 25+ years of hands-on experience.

I can fix defects, add new features, improve UI and business logic, optimize performance, modernize legacy code, update projects for newer RAD Studio versions, and integrate databases, APIs, services, DLLs, COM/ActiveX components, and third-party systems.

My experience includes database-driven Delphi applications using MS SQL Server, PostgreSQL, Oracle, DB2, SQL Anywhere, MySQL/MariaDB, InterBase/Firebird, SQLite, and other platforms. I also have practical cross-platform Delphi experience with applications built from one project for Windows, macOS, iOS, and Android.

Each package covers one clearly defined scope agreed before development begins. Larger enhancements, long-term maintenance, and broader modernization can continue through a custom hourly or milestone contract.

This service keeps the application in Delphi/Object Pascal. Migration to C#, C++, JavaScript, or another target platform is covered by my separate Delphi application migration service.
Programming Languages
Delphi
Operating System
Windows
Desktop App Expertise
App Design, Application Setup & Installation, Development, Software Debugging, Performance Optimization, Security, Application Review & Optimization
What's included
Service Tiers Starter
$125
Standard
$375
Advanced
$750
Delivery Time 3 days 7 days 14 days
Number of Revisions
122
Source Code
Setup File
-
Detailed Code Comments
-
Optional add-ons You can add these on the next page.
Fast Delivery
+$50 - $250
Additional Revision
+$50

Frequently asked questions

Igor K.Status: Offline

About Igor

Igor K.Status: Offline
Senior Software Engineer | NetSuite, SQL/ETL, Delphi & JavaCard
Victoria, Canada - 7:35 pm local time
I am a Senior Software Engineer and Technical Consultant with 25+ years of hands-on experience delivering enterprise software, database and data-migration solutions, ERP customizations, system integrations, Windows desktop applications, and workflow automation.

I help clients solve technically complex problems involving business systems, data, APIs, legacy applications, and production environments. My core areas of specialization are:

• Oracle NetSuite Development & Integration
SuiteScript 1.0/2.x, RESTlets, Map/Reduce, User Event and Scheduled scripts, SuiteTalk SOAP/REST, SuiteFlow, Saved Searches, CSV imports, third-party integrations, production troubleshooting, and legacy-script migration.

• Database Development, SQL & ETL
Microsoft SQL Server, PostgreSQL, Oracle, DB2, SQL Anywhere, MySQL, Firebird, SQLite, and 4D. I work with database design, SQL/DDL development, stored procedures, data migration, ETL, data conversion, reporting logic, performance troubleshooting, and production issue resolution.

• Delphi / Object Pascal Development
RAD Studio, VCL, Windows desktop and client/server applications, Windows Services, database applications, multithreaded systems, legacy-code modernization, debugging, refactoring, and ongoing product maintenance.

• AI-Assisted Development & Workflow Automation
n8n, API and webhook integrations, scheduled workflows, OCR and AI-assisted data extraction, database-backed automation, automated reporting, email/SMS notifications, Telegram workflows, and AI-assisted modernization of existing software.

Selected results from previous projects include:

• Authored and reworked more than 70 NetSuite SuiteScript solutions for a large ERP implementation.
• Developed REST APIs and data-migration interfaces connecting NetSuite with Salesforce, MuleSoft, payment systems, banking APIs, and third-party logistics services.
• Delivered dozens of SQL, DDL, ETL, and PowerShell solutions for healthcare, property-tax, insurance, education, and enterprise data-migration projects.
• Migrated business-critical Oracle PL/SQL logic to PostgreSQL for financial commission calculations and daily reporting.
• Delivered more than 100 improvements and bug fixes for Delphi-based transportation and healthcare applications.
• Improved a C# and SQL Server document-printing solution, reducing recurring printing costs by approximately 20%.

I also have deep specialist experience in smart cards, JavaCard/JCOP, GSM SIM/USIM, PC/SC, APDU processing, cryptography, OpenSSL, Microsoft CryptoAPI, digital signatures, and security-oriented software.

I can work across the full software-development lifecycle: requirements analysis, architecture and technical design, implementation, database development, integration, testing, deployment, documentation, production support, and root-cause troubleshooting.

My approach is structured and practical: I clarify goals, study the existing system, identify risks early, communicate progress clearly, and deliver solutions that are maintainable—not merely quick patches.

Steps for completing your project

After purchasing the project, send requirements so Igor can start the project.

Delivery time starts when Igor receives requirements from you.

Igor works on your project following the steps below.

Revisions may occur after the delivery date.

Project Access and Requirements

You provide the Delphi source code, build instructions, dependencies, and a clear description of the requested change.

Code Review and Scope Confirmation

I review the relevant code, reproduce the issue or verify the requirement, and confirm the agreed implementation scope.

Review the work, release payment, and leave feedback to Igor.