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Dan Jn

@danjn

Backend developer at Braint Systems who refactored the Forecast Budgeting project and built HemaAI, an explainable CBC analysis system.

Armenia

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At Braint Systems, I worked on backend services using FastAPI and PostgreSQL. I refactored legacy code in the Forecast Budgeting project, adding features, fixing bugs, and improving performance.

I also implemented REST APIs and database operations with SQLModel and SQLAlchemy, managed schema changes with Alembic, and containerized applications with Docker and Docker Compose.

For my Samsung Innovation Campus Artificial Intelligence graduation project, I developed HemaAI, an explainable system for analyzing Complete Blood Count results. It evaluates 14 blood indicators using age- and sex-specific reference ranges and combines rule-based reasoning with machine learning to identify abnormal patterns and rank medical hypotheses.

I implemented HemaAI's backend services with Python, FastAPI, and PostgreSQL, integrating data processing and machine learning components. Earlier, I presented Truck Up, an Android application project where drivers can post available trips and employers can post cargo transportation requests.

Experience

Work history, roles, and key accomplishments

Backend Developer

Braint Systems

Mar 2025 - Jul 2025 (4 months)

Developed and maintained backend services using FastAPI, PostgreSQL, SQLAlchemy, and Alembic, ensuring scalability and clean architecture. Refactored legacy code, implemented REST APIs, and containerized applications with Docker.

Python fastAPI PostgreSQL SQLAlchemy Alembic Docker Docker Compose REST APIs SQLModel Git

Education

Degrees, certifications, and relevant coursework

Yerevan State University

Bachelor's Degree, Informatics and Applied Mathematics

2024 -

Pursuing a degree in Informatics and Applied Mathematics, currently ongoing.

Samsung Innovation Campus UWC Dilijan

Certificate with Honours, Artificial Intelligence

2025 - 2026

Grade: Honours

Activities and societies: Relevant Coursework: Fundamentals of Machine Learning, Neural Networks, Computer Vision, Image Processing, Data Processing, Deep Learning, Artificial Intelligence.

Completed the Samsung Innovation Campus Artificial Intelligence program with honours, including coursework in machine learning, neural networks, and computer vision, and defended an individual AI graduation project.

Samsung Innovation Campus UWC Dilijan

Certificate with Honours, Java Mobile Application Development

2023 - 2024

Grade: Honours

Activities and societies: Relevant Coursework: Java Programming Basics, Object Oriented Programming, Android App Development Fundamentals, Data Structures and Algorithms, Fundamentals of Mobile Backend Development, Version Control (Git).

Completed the Samsung IT School program on Java Mobile Application Development with honours, covering Java, OOP, Android development, and backend fundamentals, and presented an individual Android application project.