Lead Data Engineer · Data Scientist · Product Builder

I turn complex data into clear, useful systems.

Based in Istanbul / Izmir, Turkey
Working globally

I work across data science, cloud platforms, backend engineering, analytics, and product development — from the business question to the production result.

See selected work

Selected work

Things I have built.

04 case studies
01

Data Cockpit

Monovi Information Technology · JTI Global Projects
2025 — Present

Architected and developed a global operational analytics platform that gives stakeholders from C-level executives to sales teams one source of truth.

Azure Synapse, Microsoft Fabric, Azure Data Lake, Databricks, Spark, Power BI, dimensional models, KPI layers, and prediction workflows.

Operational visibility across global sales teams

02

Market Intelligence Platform

AgFlow S.A.
2017 — 2025

Owned data, backend, and product engineering for an agricultural market intelligence platform used to analyze commodity markets, prices, external data, and risk.

Built Go and Python services, PostgreSQL data flows, REST integrations, Elasticsearch retrieval, Flutter mobile apps, and React dashboards. Worked across the complete mobile product loop: data contracts, backend APIs, app flows, and release-ready interfaces.

50% less manual effort · 40% fewer errors · 30% faster queries

03

oteldoctor

Open source
Technical project

A Go CLI and GitHub Action that analyzes OpenTelemetry Collector configurations for production readiness, reliability, security, and cost risks.

Designed as a practical developer tool for finding configuration problems before they reach production.

github.com/firfircelik/oteldoctor

04

The LeadLab

Freelance product engineering
2021 — Present

Full-stack lead management platform with psychometric assessment logic and an end-to-end workflow from interface to database.

React, TypeScript, Vite, Tailwind CSS, React Query, FastAPI, SQLAlchemy, MySQL, and JWT authentication.

Production-ready client platform

Experience

A record of delivery.

Lead Data Engineer / Analytics Specialist

Monovi Information Technology A.S. · JTI Global Projects

Sep 2025 — Present

Izmir, Turkey

Senior Data Analyst & Mobile/Backend Developer

AgFlow S.A.

Nov 2017 — Jul 2025

Geneva, Switzerland · Remote/Hybrid

Freelance Full-Stack Developer

International clients

2021 — Present

Remote

C# Instructor

Center for European Initiatives

Jul 2017 — Sep 2017

Sumy, Ukraine

Intern .NET Programmer

Kafein Technology Solution

Jun 2016 — Aug 2016

Istanbul, Turkey

About

Eight years of making the complicated understandable.

I lead and mentor engineers, build reliable data foundations, and translate technical work into decisions people can use. My work has included global sales analytics, agricultural markets, predictive models, mobile applications, internal tools, and public open-source software.

Core skills

Data & analyticsPython, pandas, NumPy, Jupyter, SQL, T-SQL, PL/SQL, statistical analysis, forecasting, feature engineering
Cloud & platformsAzure Synapse, Microsoft Fabric, Azure Data Lake, Databricks, Spark, AWS, ETL/ELT, dimensional modeling
Backend & databasesGo, FastAPI, Node.js, REST APIs, PostgreSQL, MSSQL, MySQL, MongoDB, Elasticsearch, Docker
Product developmentReact, Next.js, Vue.js, TypeScript, JavaScript, Flutter, Tailwind CSS, Power Apps, Power Automate
ReportingPower BI, DAX concepts, tabular models, executive reporting, KPI frameworks, stakeholder presentations

Certifications

  • — Databricks Fundamentals Accreditation · 2026
  • — Databricks Lakeflow Jobs · 2026
  • — Databricks Lakeflow Connect · 2026
  • — Data Engineer · DataCamp · 2026
  • — Data Scientist · DataCamp · 2026
  • — Data Analyst Associate · DataCamp · 2026

Contact

Let's make the next thing clear.

For data platforms, analytics products, backend systems, or a difficult problem that needs a practical answer.