Selahattin Acar

Back-End Developer & Software Builder

I build backend systems, API infrastructures, database-driven platforms and automation-focused software products. I enjoy working with modern technologies and turning real business needs into stable, scalable and maintainable systems.

[email protected]

github.com/acarfx

Turkey (TR)

About

I am a Back-End Developer based in Turkey, specializing in building server-side applications, robust API architectures, database management systems, and automated software tools. With solid experience in Linux server management, virtualization, and web infrastructure, I focus on turning complex business requirements into stable, scalable, and maintainable systems. I love learning new technologies and designing performant backend solutions.

Technical Skills

Programming Languages

JavaScript Node.js Java Python PHP C C++ C# SQL

Backend

Node.js Express.js REST API SOAP API Laravel Framework Vanilla PHP .NET Core API Gateway Architecture Authentication / Authorization License Management Systems Modular Backend Architecture

Frontend / Mobile

Bootstrap Tailwind CSS React Native Flutter HTML5 CSS3 JavaScript

Database

PostgreSQL MySQL MariaDB MongoDB ElasticSearch SQL Optimization Local JSON Database systems

Server / Infrastructure

Linux Server Management VMware Virtualization Server virtualization Server Installation & Configuration Cloud & Server Management Deployment Pipelines PM2 Process Manager Nginx Web Server SSL Configuration

API & Integration

REST API Development SOAP API Integrations Multi-service API Gateway WhatsApp Business Integration Payment / License Gateway Integration Project Management Integrations ERP System Integrations

Professional Experience

Lead Back-End Developer & Architect — Acarfx Software Solutions

2022 - Present

Turkey (Remote)

Designing and building scalable backend architectures, multi-tenant SaaS infrastructures, custom API gateways, and automation tools. Implementing secure REST/SOAP API integrations, relational and non-relational database systems, and managing virtualized Linux environments.

Developed WebAS, a unified enterprise automation platform for cloud, license, and multi-service API management.
Built a high-performance custom PostgreSQL wrapper (@webas/ps) utilizing native schema definitions in Node.js.
Designed and implemented YOLOv11 OCR based automatic license plate recognition (ALPR) system with hardware relay controls.
Created custom ERP accounting and WhatsApp notification workflows handling periodic automated reports.

Full-Stack Developer — Freelance Geliştirici

2019 - Present

Turkey

Developed custom web applications, automation scripts, and database-driven desktop software. Integrating third-party APIs (payment systems, SMS, WhatsApp), managing server setup, PM2 process management, and configuring Nginx reverse proxies with SSL.

Successfully delivered complex modular forum systems and digital product/e-pin sales platforms.
Built local JSON database solutions for lightweight low-overhead desktop client operations.
Automated deployment processes reducing server maintenance overhead by 40%.

Projects

WebAS (webas.io)

Enterprise automation platform for cloud, licensing, API gateways, and multi-service management.

Node.js PostgreSQL API Gateway SOAP REST

DcAnaliz (dcanaliz.com)

AI-powered querying, research, and data analysis system for Discord environments.

Node.js Next.js PostgreSQL AI Querying Data Analysis

ALPR License Plate Recognition

AI-driven license plate recognition and automation gateway for gated communities and facilities.

Node.js MongoDB Electron Python YOLOv11 OCR

ForumX

A modern, fast forum engine featuring modular plugin systems and WhatsApp verification.

Node.js ElasticSearch PostgreSQL WhatsApp API Plugin Engine

WebAS Muhasebe

Cross-platform ERP and accounting software with automated WhatsApp reporting and government integration.

Node.js MySQL Next.js Electron.js WhatsApp API ERP

EpinX (epinx.net)

Digital product, license, and game e-pin distribution and e-commerce infrastructure.

Laravel PHP Node.js Express asjs-express

Av. Elif Narin Dursun (elifnarindursun.av.tr)

Modern corporate web application and content management system for Attorney Elif Narin Dursun.

Node.js Express MongoDB EJS Bootstrap

Av. Alperen Kılıç (alperenkilic.av.tr)

High-performance portfolio and client automation platform for Attorney Alperen Kılıç.

Node.js Express MongoDB EJS Tailwind CSS

Certifications

Computer Programming Certificate

Fatih Sultan Mehmet Vakıf University - Continuous Education Center

Duration: 400 Hours