Backend Engineer → AI Application Developer

Fatemeh

Rostami

About Me My Experiences →

Years Backend

RAG

Systems Builder

Apps in Production

BASED IN

İstanbul, Türkiye

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ABOUT

Building RAG Systems & Intelligent APIs

I'm a Backend Engineer expanding into AI Application Development, leveraging 6+ years of backend expertise to build intelligent systems.

Currently building RAG systems with LangChain and vector databases, AI-powered workflow automation (SmartOps Copilot, Rizon Prime), and intelligent APIs that integrate LLM capabilities into backend services.

My foundation in Laravel, Symfony, API architecture, and microservices combined with data engineering experience (ETL pipelines, Snowflake, analytics at scale) gives me a unique edge in building production-ready AI applications.

EXPERIENCE

FEBRUARY 2021 - SEPTEMBER 2025 · 4 YRS 8 MOS

Retreat Guru

Remote

Backend Developer / Data Engineer

◆Refactored over 3,000 lines of legacy WordPress code into a structured Laravel architecture, enhancing performance by 40%

◆Normalized legacy database schemas, migrating unstructured JSON data into properly indexed relational tables, improving query performance and data integrity

◆Removed technical debt and anti-patterns (tight coupling, God objects), restoring code maintainability and developer velocity

◆Owned the full data infrastructure as technical lead architecting, building, and maintaining ETL pipelines processing data from 1,000+ SaaS sites

◆Built and managed data warehouse in Snowflake, enabling business intelligence and reporting through Metabase dashboards

◆Integrated analytics stack (Segment, Rudderstack, PostHog, Google Analytics) and optimized data collection, reducing costs while improving data quality

◆Architected 20+ Vue.js components using Vue 3 Composition API and TypeScript

◆Established testing framework with Vitest and Jest, achieving 85% code coverage

◆Collaborated seamlessly across 9-hour timezone gap, proactively adjusting communication for async workflows

◆Leveraged AI-powered development tools (Cursor, Claude Code) to maximize output and accelerate delivery

◆Contributed across multiple product areas: data warehouse/ETL, marketplace platform, and SaaS offerings

◆Maintained independent Linux environment while team used MacOS, self-supporting own development setup

PHP

Laravel

WordPress

Vue.js

TypeScript

Snowflake

ETL Pipelines

Metabase

Segment

Rudderstack

PostHog

Vitest

Docker

Linux

CI/CD Pipeline

NOVEMBER 2020 - JANUARY 2021 · 3 MOS

Agileful

Remote

Back End Developer

◆Participated in a critical rescue mission for Co-Dressing, transforming a failing French codebase into a production-ready system within one month

◆Debugged and reverse-engineered a complex Symfony application, ensuring platform stability for businesses and end-users

◆Redesigned the database schema, migrating to a normalized MySQL structure, which improved data query performance

◆Refactored legacy codebase applying Separation of Concerns principles, enhancing code readability and maintainability by 60%

PHP

Symfony

MySQL

Git

Docker

Linux

JANUARY 2019 - MARCH 2020 · 1 YR 3 MOS

Hirkan

Remote

Scrum Master | PHP Developer

◆Led daily scrum sessions for a 4-person development team, ensuring effective communication and task coordination

◆Mentored junior developers on backend development best practices, Git workflows, and code review processes

◆Fostered a collaborative environment that enhanced team productivity and sprint delivery

◆Spearheaded R&D initiatives for optimizing a marketing platform for an online travel agency

◆Analyzed user behavior data using Google Tag Manager and Piwik (Matomo) to enhance user experience

◆Developed and implemented a Symfony service to automate data collection, reducing manual processing time by 80%

◆Successfully eliminated data entry errors, improving overall data integrity

PHP

Symfony

MariDB

Linux

Scrum

Jira

Agile

Git

Google Tag Manager

Matomo

EXPERTISE

AI & LLM

LangChain

RAG Systems

Vector Databases

LLM Integration

FastAPI

AI Workflow Automation

Backend

PHP

Laravel

Symfony

Python

Node.js

RESTful API

API Design

Microservices

Frontend

JavaScript

TypeScript

Vue.js

TailwindCSS

Database

MySQL

MariaDB

MongoDB

Redis

Elastic Search

SQLite

Data Modeling

Architecture

System Design

Clean Architecture

SOLID Principles

Design Patterns

Repository Pattern

Service Pattern

Factory Pattern

DTO Pattern

Separation of Concerns

Event-Driven

DevOps

Docker

Kubernetes

CI/CD

Jenkins

Git

GitLab

Github

Nginx

Linux

Data Engineering

ETL Pipelines

Snowflake

Metabase

Kibana

Segment

Rudderstack

PostHog

Google Analytics

Monitoring

Sentry

Observability

Performance Optimization

Testing

Vitest

Jest

Playwright

Cypress

RobotFramework

SonarQube

Cloud

Amazon S3

Cloudflare

Leadership

Technical Leadership

Scrum

Agile

Code Review

Mentoring

Legacy Refactoring

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Let's build something intelligent

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