İstanbul, Turkey · Open to remote

Serdar Vural

Senior Software Developer · Backend & PostgreSQL

I take ownership of the backend systems a business runs on — and keep them correct while moving them forward. 8+ years in PHP & PostgreSQL. Ready for bigger systems and sharper problems.

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Years in PHP
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EU enterprises
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Commits shipped
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01 / About

Close to the data, careful with the numbers.

I'm a backend-focused software engineer with 8+ years in PHP. For the last 6+ years I've been a fullstack contributor on two production systems at USTEK RFID Solutions — an in-house enterprise ERP I own end-to-end, and an international RFID reporting platform self-hosted by 20+ enterprise clients across Europe.

My specialty is legacy modernization — moving aging systems onto modern frameworks without downtime and without breaking the numbers. I work close to the data: deep PostgreSQL schema design, query optimization, and large-scale migrations.

I use AI-assisted development daily with Claude Code, and built internal tooling so AI agents generate SQL that matches the real database schema.

/01

Legacy → modern

Migrate aging enterprise systems onto modern frameworks without downtime.

/02

Close to the data

Deep PostgreSQL — schema design, PL/pgSQL, query optimization, large-scale migrations.

/03

Financial-grade correctness

Invoicing, SEPA / DATEV exports, money math validated to the last digit.

/04

AI-assisted engineering

Claude Code daily; schema-aware tooling so agents write correct SQL.

02 / Selected work

Things I've built and shipped.

Two live products, owned end-to-end. More on the way.

Kolay IBAN

Personal product
kolayiban.tr

A secure, offline-capable personal IBAN manager — store, organize, and instantly copy bank account numbers with automatic bank and branch detection.

  • +4-layer IBAN validation — local MOD-97 → cached registry → 13k-branch DB lookup → external API
  • +Built-in maturity & interest calculator for time-deposit planning
  • +Cluster-safe, PostgreSQL-backed rate limiting · Server-Actions-first architecture
  • +Installable PWA with offline caching
Next.js 16TypeScriptDrizzle ORMPostgreSQLAuth.js v5PWA

Kampanya Takvimi

Product
kampanyatakvimi.com

A live Turkish campaign-discovery platform that aggregates promotions from banks, brands, and card providers.

  • +Gemini AI auto-extracts campaign data from a URL and fills the admin form
  • +AI-generated image prompts and a logo-merging tool
CodeIgniter 4PHP 8.1MySQLGemini AI

SQLitePad

VS Code extension
marketplace

A full-featured SQLite editor built into VS Code: open any database file and browse, edit, and query it in place through a fast, native-feeling interface.

  • +Runs SQLite compiled to WebAssembly, so there are no native dependencies and it behaves identically on Windows, macOS, and Linux.
  • +A canvas-rendered grid stays smooth past 100k rows, alongside a full SQL query runner and inline editing with an undoable history.
  • +No telemetry and no network calls; exports a schema or table as Markdown or a SQL dump, ready for documentation or an AI assistant.
TypeScriptVS Code APIReactCodeMirrorSQLite WASM
More projects in progress$ git log --follow▋
03 / Experience

Where I've been.

Backend ownership, modernization, and integrations.

Jan 2020 — Present
İstanbul (Asia) · Full-time
Current

Senior Software Developer

USTEK RFID Solutions

USTEK builds RFID-based textile tracking for laundries and hotel groups across Europe. I work on the company's two core software products.

  • →Primary owner of the enterprise ERP (CodeIgniter 4 · PostgreSQL · JWT) — designed the Account, Supply, Pricelist Engine, Stock-level BOM and PCA modules from scratch, and built a JWT REST API layer replacing direct-to-DB writes from production hardware.
  • →Senior contributor to the RFID reporting platform used by 20+ European enterprises — owned the invoicing infrastructure, multi-entity invoicing, and SEPA / DATEV / Excel export services.
  • →Currently leading the ERP's migration to Laravel 12, redesigning the data layer from the ground up.
bitparity.test — ZF1 → Laravel 12passed
invoices0 / 100
SEPA pain.0080 / 220
DATEV EXTF0 / 347
downtime0s
Jul 2018 — Dec 2019
İstanbul (Asia) · Full-time

Software Developer

Trioworx Business Solutions
  • →Built PHP web components integrated with Microsoft Dynamics CRM — dynamic org charts and multi-step application forms syncing back to CRM.
  • →Developed a field-research sales-analytics platform on CodeIgniter 3 with REST API endpoints for an Android app.
Aug 2017 — Jun 2018
Remote · Part-time

PHP Developer · Freelance

Independent
  • →Built afirsatlar.com, an Amazon affiliate platform aggregating deals from five EU/US marketplaces, with a tax & shipping calculator accurate to within 0.05 currency units.
04 / Stack

Tools of the trade.

/01 Backend
PHPLaravel 12CodeIgniter 3/4Zend Framework 1REST API design
/02 Database
PostgreSQLPL/pgSQLSchema design & migrationQuery optimizationMySQL
/03 API / Integration
RESTJWT authRFID / IoT device APIsSEPA / DATEV exports
/04 Frontend
TypeScriptNext.jsJavaScriptTailwind CSSjQueryDataTables
/05 Testing & Infra
PestPHPUnitLinux · Nginx · PHP-FPMGitPM2
/06 AI-assisted
Claude CodeSchema-aware tooling
05 / Contact

Let's build the next system together.

Open to backend, fintech, and enterprise-platform roles — remote or İstanbul. I read and write English fluently for technical work.

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