Hi, I'm

Fehim KılıçarslanFull Stack Software EngineerAI & RAG

I build and ship production systems end to end — APIs, data layers, interfaces and the infrastructure underneath — and bring RAG and agentic AI into real products.

See my work Get in touch

Based in Denizli, TürkiyeCurrently focused onRAG & agentic systemsSaaS platformsPayments & billingReal-time products

4+ years of experience

End-to-end ownership

From data model and APIs to UI and deployment — I ship complete features, not fragments.

Production-grade systems

Payments & billing, business email & DNS, real-time IoT and video streaming — running with real users.

AI that actually ships

RAG and agentic systems with FastAPI, Pydantic and Qdrant, wired into real product workflows.

About

Engineer first, framework second.

I am a Full Stack Software Engineer with 4+ years of professional experience in web and mobile development, backend systems, SaaS products, and production infrastructure. I have built and shipped production systems end to end, working across frontend and backend development, APIs, databases, cloud infrastructure, and DevOps, using technologies such as React, Next.js, Node.js, NestJS, Python, FastAPI, PostgreSQL, Redis, and Elasticsearch.

My experience spans a wide range of products and technical challenges, including payment and billing systems, business email and domain platforms, real-time IoT tracking, video streaming, and AI-powered applications. I also work with AI engineering, including RAG, agentic systems, vector databases, and AI-driven application workflows, with a focus on building scalable and reliable software across different technologies and domains.

I care about end-to-end technical ownership: understanding the problem, choosing a sane architecture, automating the boring parts, and leaving behind systems that are easy for the next person to run.

Quick facts

Role: Full Stack Software Engineer | AI & RAG
Location: Denizli, Türkiye
Experience: 4+ years

Projects

Featured work.

A few products that best show how I work.

All projects

SaaS2025 – 2026

Obly AI

Domains, business email and meetings for teams — in one workspace.

Next.jsReact NativeNode.jsPostgreSQLResend+2

View project

AI & RAG2025 – 2026

is.team

AI-powered project management on an infinite canvas, for people and agents.

FastAPIPydanticAgnoQdrantNext.js+1

View project

Web2025 – 2026

StartupDeal

Where startups and investors find each other — discovery, dealflow and programs.

ReactNext.jsTypeScript

View project

SaaS2025 – 2026

C-Band Mailbox

A production virtual mailbox SaaS with end-to-end payments, billing and payouts.

Next.jsNestJSPostgreSQLPayments

View project

Experience

Where I've built things.

Full timeline, most recent first.

Sep 2025 — Jun 2026
10 mos
Full Stack Software Engineer
Motivolog·Full-time·Remote
Worked across four products in parallel — a business email & domain workspace, a startup-investor platform, an AI-native project management tool and a virtual mailbox SaaS — owning features from data model to UI.
Obly AI
Full-stack web & mobile SaaS: shared API/DB architecture, auth, business email & mailbox management, custom domains & DNS, calendar & invitations, real-time updates.
StartupDeal
Frontend of a startup-investor platform: discovery, advanced filtering, dealflow management, investor programs and interactive workflows.
is.team
AI-powered project management on an infinite canvas; RAG and agentic RAG applications with FastAPI, Pydantic, Agno and Qdrant.
C-Band Mailbox
Production virtual mailbox SaaS (Next.js + NestJS): payments, subscriptions, billing, invoicing, commissions and payouts.
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- Designed the shared API and database architecture used by both the web and mobile clients of Obly AI, including authentication, row-level security and real-time updates.
- Built mailbox provisioning, custom domain & DNS flows and calendar/invitation workflows on top of Resend, Cloudflare (DNS, R2) and Firebase Cloud Messaging.
- Delivered the StartupDeal frontend: startup discovery, advanced filtering, dealflow tracking and investor programs with a strong focus on UX.
- Contributed to is.team, an infinite-canvas project management platform for teams and AI agents; built RAG and agentic RAG services with FastAPI, Pydantic, Agno and Qdrant.
- Implemented payments, subscriptions, custom billing & invoicing, commission calculation, provider invoicing and payout workflows for the C-Band Mailbox virtual mailbox platform (Next.js + NestJS).
Next.jsNestJSFastAPIPostgreSQLQdrantResendCloudflareReact Native
Aug 2022 — Aug 2025
3 yrs 1 mo
Full Stack Web & Mobile Developer
BUPROJECT Development / Consultancy·Full-time·Denizli, Türkiye
Three years of hands-on full stack work for agency clients: REST APIs, dashboards, a React Native iOS app, streaming infrastructure and the DevOps to keep it all running.
Onlock
Municipal waste-tracking platform: live map, real-time container sensors (fill level, battery), multi-province roles. Node.js + PostgreSQL API, Next.js frontend.
SenseKit
Social media management app: API integrations and scraping pipelines for data collection, processing APIs and the integrated frontend client.
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- Developed numerous REST APIs with Node.js/Express: JWT + refresh-token authentication, role-based access control and matching frontend guards.
- Built web interfaces with React, Next.js and Angular — dynamic content, form validation and authorization flows.
- Turned data into React chart components and embedded them into exportable PDF reports.
- Shipped an iOS application with React Native, handling build, archiving and device testing.
- Designed storage and caching infrastructure on PostgreSQL, MongoDB, Redis and Elasticsearch; built scrapers that normalize and ingest data from many sources.
- Worked on CDN-backed video services, queue systems and background workers.
- Handled DevOps: Nginx, Let's Encrypt SSL, domain management and server configuration.
Node.jsExpressReactNext.jsAngularReact NativePostgreSQLRedisElasticsearchNginx
Feb 2022 — Jun 2022
5 mos
Software Development Intern
Denizli Water and Sewerage Administration (DESKİ)·Internship·Denizli, Türkiye
Modernized an internal Yii2/PHP application and helped move spreadsheet-driven processes into a real web platform during an ERP transition.
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- Upgraded the internal Yii2 application from AdminLTE 2 to AdminLTE 3, completed the PHP version upgrade and delivered new modules.
- Migrated data and workflows previously managed in Excel into the web application.
- Took part in Mobile Device Management (MDM) rollout for corporate phones and tablets.
- Provided technical support during the procurement and migration phases of the ERP software.
PHPYii2AdminLTEMS SQL Server

Education

Formal background.

Anadolu University

Bachelor's degree · Management Information Systems (Open Education)

Sep 2022 — Ongoing

Pamukkale University

Associate degree · Computer Programming

Sep 2020 — Jun 2022· GPA 3.52 / 4.00

Skills

The toolbox.

Grouped by where they live in the stack. Highlighted items are the ones I reach for daily.

AI & RAG

Retrieval pipelines, agents and vector search in production.

RAG
Agentic RAG
Agno
Pydantic
Qdrant
MCP

Frontend

Interfaces that stay fast and readable as products grow.

React
Next.js
TypeScript
React Native
Flutter
Angular
Tailwind CSS
MUI
SCSS

Backend

APIs, auth, queues and workers built to be operated.

Node.js
NestJS
Express
FastAPI
Python
Flask
Laravel

Data & Search

Relational, document, cache and search layers.

PostgreSQL
Redis
Elasticsearch
Supabase
MongoDB
MS SQL Server
MySQL
Prisma
Drizzle
SQLAlchemy

DevOps & Cloud

Shipping and keeping things online.

Docker
Nginx
PM2
Cloudflare
Let's Encrypt
CDN & HLS
Outplane
Fly.io

Also

Tooling and integrations I reach for often.

Git
Web Scraping
Queue Systems
Resend
Firebase
Figma

Have a project in mind?

Got a product to build, a system to scale or a technical problem to untangle? Tell me about it.

Start a conversation

or email [email protected]