Sinclair Lim
Software Engineer
Seattle-based UC San Diego CS grad building automation, and SaaS solutions. Open to software engineer roles that turn data into decisive action.
Get in TouchWork Experience
CaliSim Seattle, WA
Full-Stack Software Engineer
Feb 2025 — Present- Led development of a distributed eSIM platform using TypeScript, Next.js, Node.js, PostgreSQL, improving service reliability for 10,000+ global users and supporting scalable automated operations.
- Designed and implemented full automation for order fulfillment, enabling instant delivery of travel eSIMs and fully replacing previously manual fulfillment workflows.
- Built and optimized backend processes and workflow engines that reduced operational overhead to under $20 monthly, eliminating the need for human intervention in routine fulfillment tasks.
- Analyzed customer interaction data to identify systemic friction points and inform workflow improvements, enabling more predictable and automated service behaviors.
Mansa Holding Pte Ltd Singapore
Founding Software Engineer
Jan 2021 — Aug 2024- Designed and built the company’s ERP system using Python, Supabase, AWS, digitizing manual workflows and directly replacing a full-time accounting role through automated reporting, reconciliation, and operational tracking.
- Automated critical logistics and back-office processes, increasing throughput for 1,800+ monthly operations while reducing manual intervention.
- Created structured data models, standardized templates, and process maps that improved accuracy, reduced processing time, and supported future automation expansion.
- Designed and implemented fleet-management logic that dynamically organized truck arrivals and unloading order, eliminating choke points during peak hours and improving flow efficiency.
Ministry of Defence of Singapore — Singapore
Disciplinary and Regimentation Data Analyst
Apr 2016 — Mar 2018- Consolidated and maintained 1M+ personnel records in SAP, generating data-driven policy insights that shaped regimentation guidelines across 3 military divisions.
- Applied Excel (VLOOKUP, pivot tables) to analyze disciplinary trends, producing reports that reduced repeat incidents by 15% over 2 years.
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 live 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!
