Sinclair Lim
Full-Stack Developer & Data Analyst
Seattle-based UC San Diego CS grad building analytics, automation, and SaaS solutions. Open to software engineer and data analyst roles that turn data into decisive action.
Get in TouchWork Experience
CaliSim
Full-Stack Data Engineer
Jan 2025 — Present- Shipped a global eSIM marketplace MVP in under 8 weeks with Next.js, TypeScript, Tailwind CSS, and Supabase.
- Scaled coverage to 1,300+ mobile plans across 170+ countries using schema-based routing with no traditional backend, CMS, or database dependencies.
- Enabled one-click eSIM installation for iOS 17.4+, surpassing competitor flows and improving accessibility for international travelers.
- Automated fulfillment, payments, analytics, and AI-powered support with Stripe, Supabase, and RAG, keeping infrastructure overhead near zero.
Mansa Holdings Pte Ltd
Data Operations Engineer
Jan 2021 — Aug 2024- Built and deployed a lightweight ERP for fleet operations with Python, Supabase, and AWS S3 in under 12 weeks.
- Automated job deployment, billing, and driver tracking workflows, saving operations, dispatch, and billing teams 80+ hours per week.
- Delivered real-time backend infrastructure with SQL and Supabase for live location tracking and job status updates.
- Integrated LLM-assisted tooling that reduced internal prototyping and debugging time by more than 40%.
- Trained Roboflex computer vision models to classify collected materials, reaching 75% accuracy and cutting manual sorting effort.
Ministry of Defence of Singapore
Disciplinary and Regimentation Data Analyst
Apr 2016 — Mar 2018- Managed and organized the Singapore Armed Forces database through SAP GUI, delivering policy recommendations to commanders and key stakeholders.
- Wrangled 1M+ personnel records with Excel models (VLOOKUP, pivot tables) to improve reporting speed and accuracy for leadership briefings.
Solutions I've Built
Operations Intelligence Platform
ERP analytics suite that monitors job delays, fleet downtime, and cost drivers so waste management leaders can resolve performance issues in real time. Currently powering Ecozeal Waste Management Pte Ltd.
CaliSim Global eSIM Marketplace
Launched a production-ready marketplace with one-click eSIM installs, automated fulfillment, and analytics coverage across 170+ countries.
Findings from Model Analysis
AI-Powered Apartment Price Forecasting
Engineered regression models and data pipelines in Python, NumPy, and Pandas to predict rental pricing from amenity-rich housing datasets.
Economic Dynamics: U.S. Money Velocity Analysis
Examined macroeconomic indicators with linear regression and block bootstrapping to explain movements in U.S. money velocity, surfacing Economic Policy Uncertainty as a key lever.
About Me
I’m a product-driven full-stack developer and data analyst who ships fast, high-impact software. From analytics pipelines to automation and SaaS platforms, I focus on getting reliable solutions into production quickly so teams see measurable business outcomes sooner—and I get the most satisfaction when data unlocks smoother workflows and sharper decisions.
Over the weekends, you can find me either at the tennis court, planespotting, or just catching up with friends at a nearby park!
