# Sara Trnjakov

Sara Trnjakov is a remote worker on Himalayas, Data Analyst at Introba, based in Serbia.

Source: https://himalayas.app/@saratrnjakov

```text
Data Analyst at Introba who analyzed sustainability datasets and developed a credit risk project with an interactive Power BI dashboard.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Serbia |
| Authorized to work in | Serbia |
| Salary expectations | 33k+ USD |
| Job categories | Data Analyst, Machine Learning Engineer, AI Engineer, Business Intelligence Analyst |
| Skills | Data Analysis, Machine Learning, Statistical Analysis, Exploratory Data Analysis, Financial Risk Analysis, Credit Risk Modeling, Feature Engineering, data preprocessing, Data Visualization, Business Intelligence, ETL Processes, AI Engineering, RAG, Agentic Workflows, Prompt Engineering |
| Portfolio | https://github.com/Obscurestr |
| GitHub | https://github.com/Obscurestr |

## About

```text
At Introba, I collected, cleaned, and preprocessed sustainability and building performance datasets using SQL and Excel. I also performed exploratory data analysis, optimized SQL queries, and applied machine learning models to identify trends and predictive insights.

For my Credit Risk Prediction & Financial Risk Analysis project, I analyzed 30,000 credit card records and trained, evaluated, and optimized multiple models. I also conducted Expected Loss analysis, stress testing, and Monte Carlo simulations, then built a Power BI dashboard to visualize risk and scenario analysis.

I developed projects to predict Boston housing prices and flight ticket prices, applying regression and tree-based models. The flight price project achieved an R² score of 0.816 and MAPE of 13.21%.

I'm participating in the SITA AI Engineering Bootcamp, developing practical skills in Python, API integration, Retrieval-Augmented Generation, and AI-powered applications. I hold a B.Sc. in Applied Information Technology and am pursuing an M.Sc. in Information Technologies and Systems.
```

## Experience

### Data Analyst

Introba

```text
Completed a 3-month Data Analyst internship, gaining hands-on experience in collecting, cleaning, and preprocessing large-scale sustainability and building performance datasets using SQL and Excel. Performed exploratory data analysis, optimized SQL queries, and applied machine learning models to identify trends and predictive insights.
```

Skills: SQL, Excel, Data-Cleaning, data-preprocessing, Exploratory-Data-Analysis, Machine-Learning, Power-BI, Data-Visualization

## Education

### Faculty of Applied Management, Economics and Finance

Master of Science, Information Technologies and Systems. 2026 - Present

```text
Pursuing a Master of Science in Information Technologies and Systems, expected to complete in October 2026.
```

### SITA

Bootcamp, AI Engineering

```text
Participating in a 12-phase intensive AI Engineering Bootcamp, developing skills in AI engineering, Python, API integration, prompt engineering, and AI-powered applications.
```

### Faculty of Applied Management, Economics and Finance

Bachelor of Science, Applied Information Technology. 2021 - 2026. Grade: 9.03/10

```text
Bachelor of Science in Applied Information Technology with a GPA of 9.03/10, including hands-on experience in data analytics, machine learning, and business intelligence.
```

## Tech stack

- Python
- Java
- C++
- C
- Git
- SQL
- SAP
- XGBoost
- LightGBM
- CatBoost
- Power BI

To contact Sara, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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