John Koh

John Koh Email and Phone Number

Data Engineer @ Proofpoint | MSc CS at GaTech @ Proofpoint
sunnyvale, california, united states
John Koh's Location
Singapore, Singapore
About John Koh

Data Engineer | Product Data Scientist | Software EngineerExperienced across multiple industries such as logistics, ride hailing, geospatial and cyber securitySkills:Programming Language: Python, Scala, Java, SQLData Processing Framework: Apache Spark, Trino, Presto, HadoopData Visualization: Tableau, PowerBIProduct: Impact sizing, Design of experiment/AB TestingCloud: AWSCertifications:- AWS Certified Solutions Architect – Associate- Databricks Certified Data Engineer Associate- DeepLearning.AI Data Engineering Professional CertificateEducation:MSc in Computer Science at Georgia Institute of TechnologyBSc in Information Systems, 2nd Major in Analytics at Singapore Management University

John Koh's Current Company Details
Proofpoint

Proofpoint

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Data Engineer @ Proofpoint | MSc CS at GaTech
sunnyvale, california, united states
Website:
proofpoint.com
Employees:
3582
John Koh Work Experience Details
  • Proofpoint
    Data Engineer
    Proofpoint Oct 2022 - Present
    Singapore
    Part of Proofpoint Intelligent Classification and Protection (PICP) where we help organisations modernise and enhance their data security through AI based technologies.- Build and maintain an API connector layer to standardise data ingestion from multiple 3rd party data sources (eg Microsoft SharePoint, Google Drive) for ML and Analytics use cases- Scaling data pipeline via migration of existing codebase to Spark, improving time to completion from days to hours and increasing processable data volume by 7X- Reduced Huggingface model inference time on CPU by 70% using Ray
  • Grab
    Senior Data Scientist (Analytics) - Geo
    Grab Sep 2021 - Oct 2022
    Singapore
    Utilized various techniques (e.g. simulations, regression, clustering) to drive product and business decisions, focusing on Geospatial related experiences (ETA, Routing, Navigation, Map, and Imagery data collection). - Collaborated with cross-functional teams to scope problems, define success metrics and conduct AB experiments to launch >10 products.- Instrumented >100 clickstream events, built and maintained >40 scalable data pipelines using spark and visualising results/metrics on >20 Tableau dashboards to enable teams in product planning and metrics monitoring.
  • Grab
    Data Scientist (Analytics)
    Grab Dec 2019 - Sep 2021
  • Grab
    Product Analyst
    Grab May 2019 - Nov 2019
  • Hackwagon Academy
    Teaching Assistant
    Hackwagon Academy Dec 2018 - Sep 2019
    Singapore
    - Mentored 7 classes of 45 students each for 8 sessions, teaching them Introduction to Python and Data Sciences (Data Processing using pandas, Visualisation, Machine Learning).- Worked in a team of 3 to research and develop course materials.Courses Taught:- DS101: Introduction to Python Programming- DS102: Data Analytics with Python
  • Sas
    Data Analyst
    Sas Oct 2018 - Mar 2019
    Attached to PCS Security Pte LtdConducted extensive research on Social Media using Python and presenting findings to support the department's plan.- Preprocessed texts using NLTK and Spacy to perform Topic Modeling using Gensim, visualising it in pyLDAvis.- Explored tweets over time such as extracting out growing hashtags leading up to specific events.- Analysed the sentiments of tweets using NLTK, understanding the common words used in the positive/negative sentiments.- Developed training materials to give a brief introduction to Data Science and Machine Learning to the division.- Developed basic Linux tutorial guide for staffs to learn.
  • Sas
    Business Intelligence & Analytics (Bia) Trainee
    Sas Jun 2018 - Sep 2018
    The SAS BIA Program is IMDA's Company-Led Training (CLT) initiative to recruit and train fresh professionals in Business Intelligence and Analytics.Certification:SAS Certified Base Programmer for SAS 9SAS Certified Big Data Professional Using SAS 9SAS Certified Predictive Modeler Using SAS Enterprise Miner 14 Completed training include: SAS Foundation & Administrative Modules: SAS Enterprise Guide, SAS Base Programming Essential and Advanced Techniques, SAS Macro, SAS SQLSAS Big Data management & Cleansing: Introduction to SAS & Hadoop, DS2 Programming Essentials with Hadoop, Hadoop Data Management with Hive, Pig and SAS, SAS In-Memory Statistics, SAS Data Integration StudioSAS Data Mining & Analytics: SAS Visual Analytics, Introduction to Statistic, SAS Enterprise Miner, Text Analytics Using SAS Text Miner,Building models with SAS contextual Analysis
  • Freelance
    Frontend Developer - Reactjs
    Freelance Apr 2018 - Jul 2018
    Singapore
    In a team of 6, developed a training resource management platform using ReactJS.
  • Roadbull Logistics Pte Ltd
    Operations Analyst
    Roadbull Logistics Pte Ltd Jan 2017 - Mar 2017
    - Spearheaded in a project to automate sorting processes, improving sorting accuracy to more than 97%, decreasing sorting time by 2 hours- Created a UI/UX prototype for Roadbull’s career page using Axure RP- Conducted 3 1-hour Excel training workshop for 15 fulltime employees to increase their efficiency in processing data
  • Papier Blanc
    Frontend Web Developer
    Papier Blanc May 2016 - Aug 2016
    - Developed and maintained mobile responsive Tumblr and WordPress sites for clients.- Documented an end-to-end user guide on posting blogs in WordPress.

John Koh Education Details

Frequently Asked Questions about John Koh

What company does John Koh work for?

John Koh works for Proofpoint

What is John Koh's role at the current company?

John Koh's current role is Data Engineer @ Proofpoint | MSc CS at GaTech.

What schools did John Koh attend?

John Koh attended Georgia Institute Of Technology, Singapore Management University, Ritsumeikan Asia Pacific University.

Who are John Koh's colleagues?

John Koh's colleagues are Ann Reigelman, Jose R Borras, Shailesh Kumar Pandey, Ayush Nigam, Brandon Poholchuk, Khanh N., Lori Drake.

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