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Jonathan N.

Data/Software Engineer

Jakarta, Indonesia

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About Me

Jonathan is a Data and Software Engineer with a high level of proficiency in data analytics, machine learning, and data engineering - producing high-quality, robust, and maintainable products on projects. He also has hands-on experience building 12 cross-platforms iOS/Android games in C++ and self-driving rovers robots with an A* algorithm (desktop+bluetooth). Jonathan develops and implements data models that act as the eyes and ears of complex business solutions.

Spark 3 years Python 10 years Scala 3 years Continuous Delivery (CD) 3 years GCP 7 years Hadoop 3 years Machine Learning 7 years Pandas 5 years Team Management 7 years Data Analysis 6 years Druid 3 years Data Engineering 6 years Kubernetes 4 years NLP 5 years Numpy 6 years SQL 7 years C++ 5 years Continuous Integration (CI) 3 years Rest API 5 years Software Architecture 5 years Scikit Learn 5 years Data Modeling 5 years Pytorch 4 years Keras 4 years

Work history

UpStack

Data/Software Engineer

2021 - Present (3 years)

Remote

Delivers data warehouse and ETL solutions as part of an agile team using advanced machine learning techniques to improve performance and processes.
Helps build and improve infrastructure, application and performance development and ensures tight security including data encryption, security groups, and environment scanning.
Ensures high-quality deliverables and implements DevOps and security best practices in fast-paced environments.

Python GCP SQL Team Management Data Engineering C++Machine Learning Scala Hadoop Spark Numpy Data Analysis NLP

Ewaysindo

Head of Analytics

2018 - 2021 (3 years)

Jakarta, Indonesia

Designed and developed propensity models to reduce 70% of cost call center operations. Led the data team to provide actionable insights for clients according to defined business rules and procedures.
Designed Developed SPG fraud detection model, reducing fraud cost by 90% for FMCG clients.
Designed and developed NLU/chatbots for task-based dialogue, open domain, QA, and customer service. Implemented digital analytics platforms to extract and manipulate data from digital sources, Facebook, Google, and SEMRush.

Data Analysis Data Engineering Python Numpy PostgreSQL GCP Kubernetes Machine Learning C++

Eureka / Indosat Ooredoo

Data Science Manager

2017 - 2018 (1 year)

Jakarta, Indonesia

Designed and developed telco apps/packages recommendation systems for 80 million customers. Performed exploratory data analysis, feature engineering and predictive modelling on solutions for Eureka/Indosat.
Built DPI models on telco data, bringing USD 4M new business from the ridesharing industry. Processed terabytes of raw data for the client - updating and maintaining the database.
Scaled fintech models using telco data to 61% gini accuracy with Apache Spark. Acted as first-line support for data platforms within Eureka - maintaining peak operating efficiency and ensuring maximum uptime.

Python Scala Hadoop Spark Druid Data Science Data Engineering

Annex Clinical

Data Scientist/ Software Engineer

2016 - Present (8 years)

Remote

Helped publish a clinical trial article with an NLP model that learns from 152,000 unique conversations. Designed and deployed the analytics platform to enhance clinical trial operations.
Collected, cleaned, managed, and analyzed large sets of data using Tableau to visualize data.
Designed and developed a model to predict participants dropout probability in an ongoing clinical trial study. Worked on the decentralized clinical trial (DCT) platform for clients.

Python MySQL SQL Server Data Science Machine Learning NLP Data Analysis Data Science Data Engineering Pandas

ADSKOM

Lead Data Scientist

2015 - 2017 (2 years)

Jakarta, Indonesia

Drove optimizations and improvements of knowledge graphs on users, news and e-commerce products on the ADSKOM platform.
Experimented with and applied Machine Learning models into ADSKOM products.
Developed custom data models and algorithms on solutions and assessed the accuracy of new data sources for ADSKOM.

Python Scala Hadoop Spark Druid Data Science Machine Learning

7Langit

Backend Developer

2012 - 2015 (3 years)

Jakarta, Indonesia

Designed, wrote, and maintained backend solutions for mobile and web applications.
Built and deployed APIs for iOS/Android - extracting and manipulating data to improve performance.
Developed fixes and new features on solutions.

Python C++GCP APIs iOS Android

Portfolio

Software Engineer - MILO Speed Games Series

7Langit collaborated with Nestle MILO, creating 9 games competition for 9 consecutive weeks. I worked on multiple tasks including Box2D(Fluid, Collision Detection), game controller, game update, communicate between games-iOS,games-Android(JNI/NDK), implementing graphical objects with physics, parallax, multi-resolution with a wide range of various devices( tested 10+),3D physics-like, bicycle physics, particle system, accelerometer, AI, level design. Created 7 out of 9 Games using C++ as main technology.

Data Engineer - Playground

Worked on a SaaS analytics platform that provides solutions for centralized social media channels. Implemented high-quality data solutions for analytics on the project.

Software Engineer - SmoothLife

7Langit collaborated with Nestle Indonesia to promote its newest product Smoovlatte, using the game as the main campaign. The team consisted of an iOS Developer, an Android Developer, a game developer, and two designers. I acted as a Game Developer, creating and maintaining the game part of Smoothlife, using C++ Cocos2d-X cross-platform for iOS and Android.

Data Scientist - LDA Clinical Trial paper

Discovered latent topics in patients' conversations - providing predictive models to measure study performance, delivering metrics and data pipelines for telehealth visits, participant activities, surveys and engagements. Developed charts, metrics and data filters to measure study data quality and compliance performance.

Software Engineer - Self-driving rovers robot with A* algorithm (desktop+bluetooth)

Designed and implemented an Artificial Intelligence system for Robotics. Used an A* algorithm to determine the best path for the robot to move from its location to its destination. Used WxWidgets C++ to design and create the logic of an interactive application on the system side. Used C AVR for the robot's side.

Data Engineer - ETL Text Telco Data

Designed, developed and implemented solutions to monetize telco data, 2PB, and messaging data for 80 million customers. Handled 1TB/day of data - transforming the data with Spark+Hadoop. Divided the data into L2 (customer data, summary statistics and features) and L3 (business summary data).

Education

1. Data Analyst Nanodegree 2. Exploratory Data Analysis, A/B Testing, Machine Learning, Data Science, Data Visualization

Udacity

2016 - 2016

BSc. Computer Engineering

Telkom Institute of Technology, Bandung, Indonesia

2007 - 2012 (5 years)

1. Architecting with Google Kubernetes Engine Specialization 2. Data Engineering, Big Data, and Machine Learning on GCP Specialization 3. Deep Learning Specialization 4. Customer Analytics, Wharton School 5. Executive Data Science, John Hopkins University

Coursera