Hello and Welcome!

I'm Reksa Alamsyah

A Mathematics graduate with a strong foundation in logical thinking and problem-solving, now fully focused on a career as a programmer. Skilled in backend development using Java Spring Boot, frontend development with React.js, and basic mobile development using React Native. In addition to software development, I also have experience in data analysis and machine learning, supported by multiple certifications and projects. This combination of analytical and programming skills allows me to approach problems from both a data-driven and technical perspective. Eager to grow as a full-stack developer while leveraging my analytical background to build impactful software solutions.

Photo Profil

Area of Focus

Specialized in

Back-end & Front-end Development

Designing full-stack web solutions with RESTful APIs, database integration, and interactive UI using frameworks like Spring Boot and ReactJS.

Data Analysis

Transforming raw data into actionable insights using data wrangling, cleaning, analysis and data visualization using tools like Python and SQL.

Machine Learning Modelling

Applying machine learning techniques to build predictive models and solve complex problems using algorithms like regression, classification, and clustering.

Highlighted Works

Showcased Portfolios

Port 1
Analysis
Data

This e-commerce data analysis project involved Data Wrangling, Cleaning, Exploratory Analysis, RFM Analysis and GeoSpatial Analysis to uncover sales trends and customer behavior. Key insights were visualized and deployed with an interactive Dashboard using Streamlit.

Port 2
Clustering
Classification

In this machine learning portfolio project, I analyzed customer behavior data using K-Means clustering to segment customers into distinct groups. I then applied the Random Forest classification algorithm to predict customer categories and identify patterns for targeted marketing strategies.

Port 3
API
SpringBoot

The Bucket Cinema API provides a set of RESTful endpoints for managing data related to a movie platform. It is A robust Java-based RESTful API for managing a comprehensive movie theater system, tested with JUnit & Mockito, achieving 90% unit test coverage.

Port 4
Git
Portfolio

Check out my other work such as Back-end API Development, Database and Login Schema, Thesis, NLP, and Cutting Stock Problem using Genetic Algorithm on my GitHub Repository!

Learning Path

Skills & Education

With a strong foundation in data analysis, I have expanded my expertise to include back-end, front-end, and mobile development. I continuously improve both my technical and analytical capabilities to deliver efficient and scalable digital solutions. My skillset ranges from programming and data management to building interactive applications and solving complex problems with clarity and precision.

  • Python Programming
  • Java (Spring Boot)
  • JavaScript (ReactJS, React Native)
  • HTML & CSS
  • SQL (PostgreSQL)
  • Docker
  • BE-API Design (RESTful, Swagger)
  • Data Analysis (Pandas, Excel)
  • Problem Solving & Critical Thinking
  • English (PTeSOL Score: 517)

Universitas Pendidikan Indonesia

Bachelor's Degree - Mathematics

2020-2024

IBM SkillsBuild for AI & Cybersecurity Program

MSIB Batch 6

2024

EnigmaCamp Trainee

Back-end, Front-end, and Mobile Developer

January - April (2025)

Get in Touch!

My Contact

Kontak WA
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