İlayda Tosun - Data Analysis Expert for Official Statistics

Q: Where is İlayda based?

İlayda is based in Munich, Germany .

Q: What languages does İlayda speak?

İlayda speaks the following languages: Turkish (Native), English (Advanced), German (Elementary) .

Q: How many years of experience does İlayda have?

İlayda has at least 3 years of experience. During this time, İlayda has worked in at least 1 role and for 1 company . The average length of individual experience is 3 years and 4 months . Note that İlayda may not have shared all experience and actually has more experience.

Q: What is İlayda's latest experience?

İlayda's most recent position is Data Analysis Expert at Turkish Statistical Institute .

Q: What companies has İlayda worked for in recent years?

In recent years, İlayda has worked for Turkish Statistical Institute .

Q: Which industries is İlayda most experienced in?

İlayda is most experienced in industries like Government and Administration .

Q: Which business areas is İlayda most experienced in?

İlayda is most experienced in business areas like Business Intelligence , Project Management , and Research and Development .

Q: What is İlayda's education?

İlayda holds a Master in Financial Mathematics from Middle East Technical University and a Bachelor in Mathematics from Middle East Technical University .

Q: Does İlayda have any certificates?

İlayda has 6 certificates . Among them, these include: Certificate of Attendance to “From annual to quarterly to monthly data: introduction to temporal disaggregation and benchmarking” , Certificate of Attendance to “Training on Data Mining” , and Trainer to “Introduction to Seasonal Adjustment with JDemetra+” .

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Munich, Germany

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Experience

Dec 2020 - Apr 2024

3 years 5 months

Ankara, Turkey

Data Analysis Expert

Turkish Statistical Institute

I began my career at the National Statistics Office as an Assistant Expert and was later promoted to Expert
Specialized in analyzing official statistics and handling complex datasets to extract meaningful insights
Successfully managed and coordinated over 20 ongoing projects annually, collaborating with cross-functional teams to drive data-driven decision-making and process optimization
Conducted seasonal adjustment analysis using JDemetra+ for over 1,000 time series annually, including GDP, foreign trade and consumer confidence indices
Applied forecasting, backcasting and nowcasting techniques for time series, analyzing complex datasets and high-frequency time series
Conducted econometric modeling to assess economic trends and policy impacts, applying statistical techniques to improve forecasting accuracy
Built statistical models, including ARIMA models, determining key variables using both statistical tests and economic significance
Ensured data integrity by detecting anomalies, cleaning datasets, performing outlier detection and improving data quality across databases
Automated data preprocessing and transformation workflows using Python and SQL, reducing manual effort and improving efficiency
Developed dashboards and reports in Excel and R Markdown to visualize and present results effectively
Assisted other departments with data analysis needs and provided training on data analysis, time series and seasonal adjustment
Prepared methodology reports for official statistics and communicated findings and insights to both technical and non-technical stakeholders
Collaborated with international partners (EUROSTAT, ICON Institute) to harmonize methodologies
Worked on statistics including foreign trade indices, gross domestic product, labour force statistics, foreign trade statistics, turnover indices, industrial production index, consumer price index, consumer confidence, labour input, labour cost and earnings statistics, retail sales indices, services, retail trade and construction confidence

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Government and Administration.

Government and Administration

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Business Intelligence, Project Management, and Research and Development.

Business Intelligence

Project Management

Research and Development

Summary

Mathematician with over three years of experience in statistical modeling, time series analysis, and data analysis within official statistics. Skilled in leveraging Python, R, SQL, and JDemetra+ to analyze complex datasets and support evidence-based policy insights. Holding an MSc in Financial Mathematics, I specialize in forecasting, seasonal adjustment, and high-frequency data analysis. Currently specializing in data analysis, data visualization and programming.

Skills

Programming & Data Analysis: Python, R, Sql, Jdemetra+, Excel
Statistical Modeling & Forecasting: Time Series Analysis, Arima Modeling, Seasonal Adjustment, Financial Analysis, Economic Time Series Applications, Machine Learning, Data Quality & Validation, Actuarial Pricing Models (In Progress)
Data Processing & Databases: Mysql, Postgresql, Data Pre-Processing & Automation
Visualization & Reporting: Ms Office (Excel, Word, Powerpoint), R Markdown
Communication & Collaboration: Presentation Skills, Stakeholder Engagement, Cross-Functional Collaboration
Problem Solving & Critical Thinking: Analytical Thinking, Decision Making, Attention To Detail, Innovation & Continuous Learning

Languages

Turkish

Native

English

Advanced

German

Elementary

Education

Oct 2020 - Jun 2023

Middle East Technical University

Master of Science in Financial Mathematics · Financial Mathematics · Ankara, Turkey

Apr 2018 - Sep 2018

Technical University of Darmstadt

ERASMUS+ Program in Mathematics · Mathematics · Darmstadt, Germany

Oct 2013 - Jun 2019

Middle East Technical University

Bachelor of Science in Mathematics · Mathematics · Ankara, Turkey

Certifications & licenses

Certificate of Attendance to “From annual to quarterly to monthly data: introduction to temporal disaggregation and benchmarking”

EUROSTAT and ICON Institute

Certificate of Attendance to “Training on Data Mining”

European Union and Turkish Government

Trainer to “Introduction to Seasonal Adjustment with JDemetra+”

Ministry of Trade-Republic of Türkiye

Attendance to “Training on Seasonal adjustment with JDemetra+”

IPA 2019 Multi- Beneficiary Statistical Cooperation Programme

Attendance to “The Use of R in Official Statistics”

Certificate of completion to internship at Central Bank of Türkiye

Central Bank of Türkiye

Statistics

Experience

Total positions 1

Experience in Government and Administration 3.5 y

Avg length 3 y 4 m

Longest experience 3 y 4 m

Global Experience

Countries worked in 1 (Turkey)

Primary country Turkey

Expertise

Recent roles Data Analysis Expert

Main industries Government and Administration

Main business areas Business Intelligence, Project Management, Research and Development

Qualifications

Highest degree Master

Certifications earned 6

Profile

Created

October 2025

Last Update

October 2025

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Frequently asked questions

Have questions? Find more information here.

İlayda is based in Munich, Germany.

İlayda speaks the following languages: Turkish (Native), English (Advanced), German (Elementary).

İlayda has at least 3 years of experience. During this time, İlayda has worked in at least 1 role and for 1 company. The average length of individual experience is 3 years and 4 months. Note that İlayda may not have shared all experience and actually has more experience.

Based on recent experience, İlayda would be well-suited for roles such as: Data Analysis Expert.

İlayda's most recent position is Data Analysis Expert at Turkish Statistical Institute.

In recent years, İlayda has worked for Turkish Statistical Institute.

İlayda is most experienced in industries like Government and Administration.

İlayda is most experienced in business areas like Business Intelligence, Project Management, and Research and Development.

İlayda holds a Master in Financial Mathematics from Middle East Technical University and a Bachelor in Mathematics from Middle East Technical University.

İlayda has 6 certificates. Among them, these include: Certificate of Attendance to “From annual to quarterly to monthly data: introduction to temporal disaggregation and benchmarking”, Certificate of Attendance to “Training on Data Mining”, and Trainer to “Introduction to Seasonal Adjustment with JDemetra+”.

İlayda is immediately available part-time for suitable projects.

İlayda's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.

To hire İlayda, click the Meet button on the profile to request a meeting and discuss your project needs.

Daily Rate Distribution

0 1 2 3 4

<€720 €720-800 €800-880 €880-960 €960-1040 €1120+

The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1000

750

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250

Daily rate avg. 851 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

1000

750

500

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Median rate 860 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Similar Freelancers

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Nearby freelancers

Professionals working in or nearby Munich, Germany

Experience

Data Analysis Expert

Turkish Statistical Institute

Industry Experience

Business Area Experience

Summary

Skills

Languages

Education

Middle East Technical University

Master of Science in Financial Mathematics · Financial Mathematics · Ankara, Turkey

Technical University of Darmstadt

ERASMUS+ Program in Mathematics · Mathematics · Darmstadt, Germany

Middle East Technical University

Bachelor of Science in Mathematics · Mathematics · Ankara, Turkey

Certifications & licenses

Certificate of Attendance to “From annual to quarterly to monthly data: introduction to temporal disaggregation and benchmarking”

EUROSTAT and ICON Institute

Certificate of Attendance to “Training on Data Mining”

European Union and Turkish Government

Trainer to “Introduction to Seasonal Adjustment with JDemetra+”

Ministry of Trade-Republic of Türkiye

Attendance to “Training on Seasonal adjustment with JDemetra+”

IPA 2019 Multi- Beneficiary Statistical Cooperation Programme

Attendance to “The Use of R in Official Statistics”

Certificate of completion to internship at Central Bank of Türkiye

Central Bank of Türkiye

Statistics

Experience

Global Experience

Expertise

Qualifications

Profile

Frequently asked questions

Where is İlayda based?

What languages does İlayda speak?

How many years of experience does İlayda have?

What roles would İlayda be best suited for?

What is İlayda's latest experience?

What companies has İlayda worked for in recent years?

Which industries is İlayda most experienced in?

Which business areas is İlayda most experienced in?

What is İlayda's education?

Does İlayda have any certificates?

What is the availability of İlayda?

What is the rate of İlayda?

How to hire İlayda?

Daily Rate Distribution

Average rates for similar positions

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