Energy + finance focused engineer

Feifan designs resilient tooling for founders and operators.

Freelance full-stack developer translating ERSA pricing rules, learning platforms, and bank-grade workflows into approachable web apps powered by Julia models, Next.js frontends, and Azure/AWS infra.

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About

Hi, I’m Feifan—a Brisbane-based engineer who has tuned energy calculators at Edge2020, scaled learning platforms for JR Academy, and now partners with SMEs to blend analytics with calm UX. I love distilling dense models into tools that teammates actually enjoy using.

These days I split time between Julia prototyping, Next.js delivery, and ops automation inside Notion. Longer essays and lab notes live on the Thoughts page if you’d like the details.

Experience

  1. 2022
    2022 — Present Senior Full Stack Developer

    Freelance Engineer & Advisor

    with founders and SMEs to prototype finance and energy tooling, blending Julia models, Next.js frontends, and Notion automations into shippable insights.

    • Next.js
    • Notion API
    • Julia
    • Vercel
    Highlighted work
    • Energy Rates Advisor

      Julia-backed calculator that mirrors ERSA pricing logic so customers can explore tariffs and solar scenarios in minutes.

    • Notion Delivery Hub

      Notion + Next.js playbook that centralizes project docs, automated reminders, and embedded forms for boutique clients.

  2. 2022
    2022 Independent Consultant

    Freelance Engineer & Advisor

    Partnering with founders and SMEs to prototype finance and energy tooling, blending Julia models, Next.js frontends, and Notion automations into shippable insights.

    • Next.js
    • Notion API
    • Julia
    • Vercel
    Highlighted work
    • Energy Rates Advisor

      Julia-backed calculator that mirrors ERSA pricing logic so customers can explore tariffs and solar scenarios in minutes.

    • Notion Delivery Hub

      Notion + Next.js playbook that centralizes project docs, automated reminders, and embedded forms for boutique clients.

  3. 2019
    2019 — 2022 Edge2020 (Edge Energy Services)

    Senior IT Developer & Analyst

    Led the modernization of the Edge client portal, TEEMS back office, and internal calculators, translating ERSA rules into resilient Azure-first services.

    • Azure Functions
    • Next.js
    • SQL Managed Instance
    • Power BI
    Highlighted work
    • Client Portal Modernization

      Refreshed portal.edgeenergyservices.com.au with modular UI, role-specific workflows, and integrated rate calculators.

    • 5MS Data Pipeline

      Built meter and pricing processors for the Five-Minute Settlement reform, ensuring clean data ingestion and reporting.

  4. 2018
    2018 — 2019 JR Academy

    Full Stack Web Developer

    Shipped features across the public site and learning platform using React, Redux, .NET APIs, and AWS to speed enrolment and content delivery.

    • React
    • Redux
    • .NET Core
    • AWS EC2
    Highlighted work
    • Learning Platform Revamp

      Updated learn.jiangren.com.au with responsive modules, SSO, and performance optimizations backed by .NET services.

    • Enrollment Automation

      Introduced workflows that sync course registrations with CRM and reporting via AWS-hosted microservices.

  5. 2008
    2008 — 2013 China Industrial Bank

    Software Engineer

    Engineered high-availability services for the bank’s core transaction system with C, embedded SQL, and Tuxedo middleware on AIX.

    • C
    • Embedded SQL
    • Tuxedo
    • AIX
    Highlighted work
    • Availability Monitor System

      Developed bash + awk monitoring that tracks middleware health and alerts ops teams before outages.

    • Transaction Middleware Hardening

      Optimized Tuxedo/WebLogic services and MQ integrations to keep SLA-critical workloads stable at scale.