Building Custom Software That Replaces Spreadsheets and Paperwork
I'm Istiak Hossain — a Laravel & React developer specializing in business automation systems for inventory, accounting, and daily operations.
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About Me
I'm a self-taught full-stack developer working at an organization spanning microfinance, healthcare, and education. Over the past several years, I've built production software that handles real money, real inventory, and real daily operations — for rice mills, pharmacies, hospitals, and microfinance institutions.
I care about clean architecture that doesn't break as a business grows. My work follows strict separation of concerns — Repository and Service patterns, single sources of truth for financial logic, and interfaces that are simple enough for non-technical staff to use every day.
When I'm not building software, I'm exploring design and branding work, or diving deeper into modern React patterns.
Years Experience
Systems Built
Industries Served
What I Do
I design and build tailored software solutions that solve real business problems, improving efficiency, accuracy, and reporting clarity.
Business Process Automation
Turning manual, paper-based workflows into reliable software — reducing errors and saving hours of manual work every week.
Inventory & Accounting Systems
Custom-built systems for tracking stock, sales, dues, and daily cash flow — with a single source of truth for every transaction.
Custom Reporting & Dashboards
Print-ready reports and real-time dashboards that turn raw data into decisions — no more manual spreadsheet compilation.
API Integration & Backend Architecture
Clean, maintainable backend systems using Repository/Service patterns — built to scale without breaking.
Case Studies
A deep dive into production-grade systems built for real operations, focusing on performance, data integrity, and architectural separation.
Rice Mill Operations & Automation System
Problem
A rice milling business tracked two seasonal cycles (Boro and Aman) using paper ledgers and disconnected spreadsheets — leading to reconciliation errors and no reliable way to track customer dues.
Solution
Built a full transaction management system with a single financial source of truth — every payment routes through one central service to eliminate duplicate entries. Designed six purpose-built, print-first reports (Day Book, Customer Ledger, Due List, Season Summary, Payment Collection, Bag Usage).
Result
Eliminated duplicate financial entries, gave the owner real-time season performance visibility, and reduced end-of-season reporting from days to a single click.
Pharmacy Management — Supplier & Purchase
Problem
A pharmacy needed a reliable way to manage supplier relationships, purchase orders, and inventory — while enforcing credit limits and tracking expiry dates to avoid stock losses.
Solution
Built a full Supplier & Purchase Module following a strict Controller → Service → Repository → Model architecture, with credit limit management, FEFO (First-Expiry-First-Out) inventory logic, partial receiving support, and multiple payment methods.
Result
Gave the pharmacy accurate, real-time inventory tracking and reduced financial risk through automated credit limit enforcement.
Hospital Management — Test & Accounting Modules
Problem
A hospital needed a way to manage patient test records and generate accurate financial reports across multiple departments (general hospital, medicine, and optics).
Solution
Developed a medical test management module with grouped patient entries and A4 receipt printing, along with accounting modules generating Trial Balance, Balance Sheet, Profit & Loss, and Cash Flow reports in traditional column layouts.
Result
Streamlined patient test record-keeping and gave hospital administration accurate, print-ready financial reports across all departments.
Microfinance Data Processing & Structuring
Problem
An NGO with 42 branches and over 2,100 microfinance groups (samities) needed branch-level data aggregated into regional and zonal reports — a process complicated by Bengali Unicode text matching.
Solution
Built Python-based data processing pipelines using openpyxl to extract, clean, and aggregate branch, employee, and field officer data into structured Excel and JSON outputs — solving Bengali Unicode matching challenges along the way.
Result
Delivered accurate, structured regional and zonal reports, reducing what was previously a manual, error-prone process to an automated pipeline.
Other Selected Projects
A list of tools, packages, and open-source modules built with clean engineering standards.
Tools I Work With
My production-grade development workflow relies on modern languages, frameworks, databases, and process utilities.
Backend & Systems
Frontend Stack
Database Engines
Developer Tools
Let's Build Something Together
Have a project in mind? I'm available for remote freelance work and direct agency contract roles. Get in touch to discuss how we can automate your operations.