Joslyn Lim
Verified Expert in Engineering
Data Developer
Kuala Lumpur Federal Territory of Kuala Lumpur, Malaysia
Toptal member since September 28, 2022
Joslyn is a seasoned data practitioner with demonstrated experience across multiple industries, including technology consulting and customer service. With her academic background in applied statistics and a skillset in machine learning, data analytics, Python, and SQL, Joslyn has delivered numerous projects with positive business impacts on customers.
Portfolio
Experience
Availability
Preferred Environment
Visual Studio Code (VS Code), Python 3, SQL
The most amazing...
...project I've worked on was building a data lake, data warehouse, dashboards, and four machine learning use cases within 12 months with over 20 team members.
Work Experience
Chief Technology Officer
Dattel
- Led the product development for an ad copy and ad creative generator with a team of five using GPT3.5 and stable diffusion. The MVP was showcased in a regional marketing event which brought in around 100 usage in the first week.
- Built the IT policy and data governance framework from scratch with GCR personnel to safeguard company assets from cyber threats.
- Upgraded the development cycle for both the engineering and data teams to adopt a CI/CD practice, resulting in approximately 20% development time saved at the first stage.
Data Science Manager
Kognitiv
- Performed pre and post campaign analysis for both ATL and BTL campaigns using SQL, Python and R to understand the feasibility and effectiveness of the campaigns which were able to achieve an average uplift of 2-3% during non-festive seasons.
- Led the analytics team in migration and integration tests post-implementation of data and machine learning model migration for regional clients using Python, SQL, and X-Ray, which saved the effort for up to 2 FTE (manual tester).
- Advised both internal and external stakeholders on data analytics methodologies, campaign A/B testing, and technology architecture to achieve desirable outcomes.
Data Scientist
Stop the Traffik
- Conducted a user experience discovery workshop to identify user pain points and needs.
- Developed an entity sentiment model to predict article sentiments for business users using transfer learning.
- Collaborated with the client and other Toptalers to bring the machine learning model into production using IBM Cloud.
Data Scientist | Management Consulting Services
D3 Management LLC
- Integrated 3rd-party LMS data to a Sharepoint list and PostgreSQL for insight generation using APIs, Power Automate, and Airflow.
- Built ETLs on premise core data to PostgreSQL using Power Automate.
- Created Power BI dashboards for end users' consumption to accelerate time to gain insight and make informed decisions.
Lead Analyst
AXA Group
- Introduced analytics into the digital sales team to deploy a retention machine learning model for motor policy, digital sales dashboard, and policy benefit package optimization, which improved the annual gross premium with a lower loss ratio.
- Led the implementation of MLOps practice using AWS to monitor, track, maintain, and improve the existing or productionizing machine learning models to accelerate the development cycle from six to three months with greater transparency and visibility.
- Joined forces with the finance and actuarial team to implement International Financial Reporting Standard (IFRS) 17 using a data lake and reporting tools like SAP Webi to provide timely and granular insights to stakeholders.
- Headed data literacy initiatives across the enterprise by curating learning programs, assessment, mentoring programs, hiring, retention, and various engagement activities that uplifted the overall data literacy index from 33 to 50 (total 100).
Data Science Manager
EY
- Led, managed, and won more than $1 million in data analytics projects with the regional DnA team.
- Headed and launched multiple analytics projects, including attrition modeling, language modeling, optimization, and dashboards, with teams of between 2 and 10 people that delivered positive economic impact to society and organizations.
- Was in charge of people management for the regional team and was responsible for establishing and sustaining learning programs, events, and mentorship to support the team's continuous personal and career growth.
Senior Associate – Data Science
EY
- Developed a machine learning optimization model using ensemble models (XGBoost with Random Forests) for a refinery that estimated could save up to $100,000 for regional factories.
- Created a social listening dashboard using text analysis for a utility company to improve digital reputation score (DRS) by enabling prompt responses to negative sentiments on social media platforms.
- Built a face recognition and tracking MVP for intruder detection using transfer learning for a smart city prototype.
Head of Research and Analytics
Dattel
- Led a two-way function of expressing business strategy in analytics terms to key counterparts across a line of businesses and functional areas, such as software engineering, marketing, etc., after a merger between True Vox Asia and Dattel.
- Designed, managed, and delivered data experiments, collections, and analytics services on a consumer intelligence platform as part of the product offerings to small and medium-sized businesses.
- Managed hands-on multiple projects, including customer segmentation, brand advocacy, psychometric profiling, and social-economic study publications to enable strategy formation for consumer brands to acquire, engage and retain their customers.
Experience
Motor Claim Part Price Prediction Model
Customer Retention Model for Insurance Policies
Natural Language Processing and Modeling
Employee Retention Prediction
Education
Master's Degree in Statistics
University of Malaya - Kuala Lumpur, Malaysia
Bachelor's Degree in Mathematics
University of Science, Malaysia - Penang, Malaysia
Certifications
AWS Certified Machine Learning
AWS
Enterprise Design Thinking Co-creator
IBM
Power Platform Solution Architect Expert
Microsoft
Power Platform Functional Consultant Associate
Microsoft
Google Cloud Certified Professional – Machine Learning Engineer
Google Cloud
GCP Professional Cloud Architect
GCP
Azure AI Engineer Associate
Microsoft
Azure Data Science Associate
Microsoft
Azure Solution Architect Expert
Microsoft
Professional Scrum Master I
Scrum.org
Skills
Libraries/APIs
Pandas, NumPy, Keras, XGBoost, Scikit-learn, Apache, PyTorch, TensorFlow
Tools
Business Intelligence Development, Microsoft Flow, Tableau Development, Git, Amazon SageMaker, Spreadsheets, Azure Machine Learning, AWS Glue, GitHub, Spark, Microsoft Power Apps, Named-entity Recognition (NER), Amazon QuickSight, AWS Fargate, Apache Airflow, Excel Development, Bitbucket, Jira
Languages
Python, Python, SQL, R
Paradigms
Agile Development, Business Intelligence Development, Design Thinking, Agile Development, ETL, Unit Testing
Platforms
Azure, Linux, Jupyter Notebook, Microsoft Power Automate, SharePoint Development, AWS, Linux, Amazon EC2, Microsoft Power Platform, Docker, Ubuntu, RStudio, SharePoint Design, Cloud Engineering, Visual Studio Development, Heroku
Storage
PostgreSQL, Database, Amazon S3, Redshift, Database, MongoDB, SQL Server
Industry Expertise
Virtual Coaching, Marketing Design
Frameworks
Flutter, .NET
Other
Data Science, Machine Learning, Data Science, Analytics Development, Data Science, Jupiter, Data Science, Modeling, Data Science, EDA, Statistics, SAP Business Intelligence (BI), IT Consultant, NLP, Data Analysis, Data Visualization, Amazon Machine Learning, Business Analysis Consulting, Dashboard, Big Data Architecture, A/B Testing, Product Development, Artificial Neural Networks (ANN), Regression, Deep Learning, Classification, Neural Network, Reports, Heatmaps, Data Science, Cloud Engineering, Text Classification, Freelance Programming, Consumer Behavior, Data Cleaning, Large Data Sets, Unstructured Data Analysis, Data Gathering, APIs, BERT, Custom BERT, Software Architecture, Azure Databricks, Scrum Master Consulting, Artificial Intelligence, Solution Design, Solution Architecture, IT Project Management, Communication Coaching, Root Cause Analysis, Sentiment Analysis, Classification Algorithms, Principal Component Analysis (PCA), Multivariate Statistical Modeling, Brandwatch, Data Extraction, Cost Reduction & Optimization (Cost-down), Excel 365, Data Engineering, Language Models, Machine Learning Operations (MLOps), Google Cloud ML, Text Analytics, Web Scraping, Data Scraping, Generative Pre-trained Transformers (GPT), Learning Management Systems (LMS), IBM Cloud, BI Reporting, Integration, UI Development, LLM, GPT-4, FastAPI, Data Migration, Product Consultants, Digital Advertising, Design Strategy, OpenAI, Transformer Models, Social Listening, Education Technology (Edtech)
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