engineering System Architect & Senior Developer

Building practical software with Delphi, REST API, and cross-platform systems.

I am Fajar Donny Bachtiar, specializing in Delphi FMX/VCL, Object Pascal, and scalable backend systems. From Electronic Medical Record applications and mobile apps to REST and WebSocket services, I engineer solutions focused on reliability, maintainability, and performance.

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person Professional Summary

I am a Senior Delphi Software Developer and System Architect with more than 5 years of experience designing, building, and maintaining production business applications with RAD Studio and Object Pascal. My work focuses on transforming operational requirements into stable, maintainable, and scalable software across desktop, mobile, backend, and database-driven environments.

I work with Delphi FMX, Delphi VCL, REST APIs, WebSocket, FireDAC, and relational databases to deliver Electronic Medical Record systems, mobile applications, REST services, WebSocket services, attendance systems, and other database-driven business applications. I also create Delphi tutorial content through Blangkon FA, sharing practical implementation knowledge for developers who build real-world Delphi applications.

layers Core Stack

Languages & Frameworks

Delphi FMX Delphi VCL Object Pascal RAD Studio

Architecture & Backend

REST API WebSocket Backend Systems System Architecture

Domains

Electronic Medical Records Inventory Mobile & Desktop

timeline Professional Journey

Senior Software Developer

Current

Medad LLC

Architecting and developing core enterprise solutions. Overseeing cross-platform deployment strategies and optimizing backend database performance for high-availability systems.

Software Engineer

Previous

PT. Pilar Data Esensia

Developed mobile applications, REST services, and WebSocket-based integrations for Electronic Medical Record systems used in healthcare environments. Responsibilities included application development, service integration, testing, debugging, and ongoing maintenance.

Freelance System Architect

Consulting

Independent Projects

Delivered end-to-end custom software solutions including attendance tracking systems, specialized inventory management, and tailored database architectures for various SMB clients.

data_object Open Source Artifacts

api
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Delphi REST API Starter Kit

A comprehensive foundational framework for rapidly deploying robust, scalable RESTful APIs using Delphi. Includes standardized routing, authentication patterns, and database connection pooling optimized for high concurrency.

Delphi REST Framework
devices
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Delphi FMX Starter Kit

An architectural template for cross-platform mobile and desktop application development using FireMonkey. Features responsive UI patterns, state management concepts, and pre-configured deployment setups.

FMX Cross-Platform UI/UX
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school Academic Background

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University of Technology Yogyakarta

Degree in Computer Science / Technology

Graduated

library_books Research & Publications

Prediction of Gold Price via API using Delphi

A technical paper detailing the implementation of automated data retrieval and forecasting models integrated directly into a compiled Delphi application architecture.

Creation of an Image Dataset and Metadata Analysis

Exploration of structured dataset generation methodologies and metadata handling techniques relevant to machine learning pre-processing pipelines.

Initialize Connection

Available for architectural consulting, senior-level development roles, and collaborative open-source engineering. Reach out via the channels below.

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