Joslyn Lim
Verified Expert in Engineering
Data Developer
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
- Machine Learning - 9 years
- Data Science - 9 years
- SQL - 9 years
- Databases - 8 years
- Statistics - 6 years
- Python 3 - 5 years
- Agile Project Management - 3 years
- Azure - 2 years
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
Data/AI Developer
Yara International - Africa and Asia
- Led the design and implementation of an LLM-powered agent bot, focusing on controllability, governance, and real-world operational reliability for sales agronomists.
- Built an agent bot in both Azure and AWS cloud platforms using Bedrock, AgentCore, ECS, Lambda, Redshift, and DynamoDB, aiming to serve more than 100 sales agents across three countries.
- Provided consultation and guidance about AIOps, SRE, data modelling, and governance for LLM applications.
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 at a regional marketing event, which attracted around 100 users in the 1st 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 1st stage.
- Built RAG MVP of business advisor for small and medium businesses using Open WebUI with OpenAI APIs.
- Led end-to-end product development from ideation to delivery for alternate financing partners to deliver revenue-based financing to small and medium businesses.
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 / AI Expert
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
Data Annotation Specialist for RAG (Retrieval-augmented Generation) Project
Sales Analytics Bot for Agriculture MNC
Education
PhD in Statistics
University of Malaya - Kuala Lumpur
Master's Degree in Statistics
University of Malaya - Kuala Lumpur, Malaysia
Bachelor's Degree in Mathematics
University of Science, Malaysia - Penang, Malaysia
Certifications
Google Cybersecurity Professional
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, Spark ML, PyTorch, TensorFlow, PySpark, Claude API
Tools
Microsoft Power BI, Microsoft Flow, Tableau, Git, Amazon SageMaker, Spreadsheets, Azure Machine Learning, AWS Glue, GitHub, Spark SQL, Microsoft Power Apps, Named-entity Recognition (NER), Amazon QuickSight, AWS Fargate, Apache Airflow, Excel 2010, Bitbucket, Jira, Zapier, n8n, Claude, Microsoft Copilot, Claude Code
Languages
Python 3, Python, SQL, R, Snowflake
Paradigms
Agile Project Management, Business Intelligence (BI), Automation, Design Thinking, Agile, ETL, Unit Testing, Anomaly Detection, Model Context Protocol (MCP)
Platforms
Azure, Ubuntu 16.04, Jupyter Notebook, Microsoft Power Automate, SharePoint 365, Amazon Web Services (AWS), Linux, Amazon EC2, Microsoft Power Platform, Docker, Ubuntu, RStudio, SharePoint, Google Cloud Platform (GCP), Visual Studio Code (VS Code), Heroku
Storage
PostgreSQL, Databases, Amazon S3 (AWS S3), MySQL, Redshift, Data Pipelines, MongoDB, Microsoft SQL Server
Industry Expertise
Project Management, Marketing, Insurance
Frameworks
Flutter, .NET 3, Azure Bot Framework
Other
Artificial Intelligence (AI), Data Science, Machine Learning, Data Analytics, Analytics, Data Wrangling, Jupiter, Data Scientist, Modeling, Exploratory Data Analysis, EDA, Generative Artificial Intelligence (GenAI), Data, Technical Hiring, Interviewing, Statistics, SAP Business Intelligence (BI), IT Consulting, Natural Language Processing (NLP), Data Analysis, Data Visualization, Amazon Machine Learning, Business Analysis, Dashboards, Big Data, A/B Testing, Product Development, Artificial Neural Networks (ANN), Regression, Deep Learning, Classification, Neural Networks, Reports, Heatmaps, Data Reporting, Cloud, Text Classification, Programming, Consumer Behavior, Data Cleaning, Large Data Sets, Unstructured Data Analysis, Data Gathering, APIs, BERT, Custom BERT, Software Architecture, Data Labeling, Data Annotation, Predictive Analytics, ETL Pipelines, Prompt Engineering, eCommerce, Startups, Technical Strategy, Code Review, Source Code Review, Task Analysis, Team Management, Architecture, AI Consulting, AI Design, AI Programming, Agentic AI, Technical Leadership, Data Modeling, Linear Regression, Statistical Analysis, Statistical Learning, Statistical Modeling, Azure Databricks, Scrum Master, Solution Design, Solution Architecture, IT Project Management, Communication, Root-cause Analysis (RCA), 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, User Interface (UI), Large Language Models (LLMs), OpenAI GPT-4 API, FastAPI, Data Migration, Product Consultant, Digital Advertising, Strategy, OpenAI, Transformer Models, Social Listening, Education Technology (Edtech), Time Series, Transformers, CTO, Smart City Technology, Smart Cities, Data Architecture, Enterprise Resource Planning (ERP), SAP, Predictive Modeling, Time Series Forecasting, Business Transformation, Strategy Consulting, API Integration, AI Agents, Financial Markets, Hugging Face, Product Delivery, Board Reporting, RAG Architecture, Chatbots, AI Product Management, AI Automation, Website Data Scraping, Robotic Process Automation (RPA), Dagster, Workflow Automation, Retrieval-augmented Generation (RAG), Vector Databases, AI Pipeline, Anthropic, Agentic RAG Systems, AI Chatbots, Supabase, LangChain, Azure AI Bot Service, LLM Reasoning, Cybersecurity Operations, Chatbot Conversation Design, Full-stack, Data Anonymization, Document Processing, Optical Character Recognition (OCR), AI Integration, Healthcare Services, scoring, BI Reports, Data Integrity, Dashboard Development, Forecasting, Finance, Gemini, RAG Systems, Amazon Bedrock AgentCore
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