The plain version. One page, nothing moves.
Jing Yuan Lew
Software engineering student. Backend and web systems, aimed at finance and applied AI.
I build a system all the way through and then write down how it works, which is the part most people skip. Company email on a custom domain, twice over: a mail server I administer, and a serverless pipeline that costs nothing while nobody is sending. The movement-tracking application for ICON Camp 2026 went from an empty schema to being used on site by staff who had never seen it before. Jobxy, where I am a co-founder, keeps teaching me that the code was never the expensive part.
I want to aim this at financial systems, where correctness is the specification rather than a preference.
Work
Custom-domain mail systems2024 — now
Designed and run company email on custom domains — both a self-administered mail server and a serverless send/receive pipeline, with SPF, DKIM and DMARC monitored for deliverability.
Postfix, Dovecot, DNS, SPF/DKIM/DMARC, serverless functions
ICON Camp 2026 movement tracker2026
Built the complete movement-tracking application used at ICON Camp 2026 — data model, check-in flow, and a live operator view of group locations.
web app, realtime updates, auth, reporting
Jobxy, a manpower platform2025 — now
Co-founder of Jobxy, a manpower management platform in active development. Responsible for product architecture and engineering.
product architecture, Postgres, payments, multi-tenant data
Client web development2024 — now
Freelance and project web development: marketing sites, internal tools and dashboards, front to back.
JavaScript, React, Node, hosting and deploys
Automation script toolkit2024 — now
A set of automation scripts for backups, deploys, data cleanup and scheduled reporting.
Python, Bash, cron, third-party APIs
Prompt systems and evaluation2025 — now
Design and evaluation of prompt systems for reliable, repeatable model output, including structured outputs and failure handling.
LLM APIs, evaluation harnesses, structured output
Skills
Backend and infrastructuremail servers, serverless, DNS
Web developmentReact, Node, client builds
Jobxyco-founder, architecture
AI and prompt systemsprompt design, evaluation
AutomationPython, Bash, cron
Finance readingself-taught, in progress