Open to work in clean energy, logistics & fintech

Full-Stack Developer · Greater Kuala Lumpur, Malaysia

JullienNazreen

I engineer web & mobile platforms that turn used cooking oil into clean-energy feedstock.

Full-stack developer at FatHopes Energy — building the systems behind Southeast Asia's UCO collection and energy-feedstock trading, end-to-end from database schema to the interfaces vendors use every day.

View my work Download CV
Jullien Nazreen
Kuala Lumpur, MY
About

Full-stack, end to end.

I've grown from backend services into owning features end-to-end — from database schema and API design through to the interfaces vendors and internal teams rely on every day.

KPI-driven and comfortable in fast-moving environments where requirements shift quickly. I build across the stack: Next.js and React on the web, Flutter for mobile, and Node.js (Nitro) with GraphQL and Prisma on the backend.

I care about shipping reliable, well-structured software — type-safe code, sensible architecture, and clean UX — and I'm always picking up the next tool that makes the team faster.

FocusClean energyLogisticsFintech
0+
Platforms & portals shipped
0
Languages localized
in production mobile app
0
Databases in production
Postgres · MySQL · Mongo
0
Targets, one codebase
iOS · Android · Web
Toolkit

What I build with

A full-stack toolkit spanning web, mobile, backend, data and cloud — chosen for shipping reliable software fast.

Web

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • shadcn/ui
  • TanStack Query
  • TanStack Table

Mobile

  • Flutter
  • Dart
  • iOS
  • Android
  • Cross-platform

Backend

  • Node.js
  • Nitro
  • GraphQL (Yoga)
  • REST APIs
  • Prisma ORM
  • LoopBack 4

Databases

  • PostgreSQL
  • MySQL
  • MongoDB

Cloud & DevOps

  • Azure
  • Vercel
  • Docker
  • Blob Storage
  • Container Registry
  • CDN

Platform & More

  • JWT / OAuth (SSO)
  • Real-time GPS
  • Payments
  • PDF / Excel reporting
  • Dashboards
  • Sentry · Winston
Next.jsReactTypeScriptFlutterNode.jsNitroGraphQLPrismaPostgreSQLTailwind CSSAzureDockerNext.jsReactTypeScriptFlutterNode.jsNitroGraphQLPrismaPostgreSQLTailwind CSSAzureDocker
Selected Work

Things I've shipped

Production platforms behind FatHopes Energy's used-cooking-oil collection and energy-feedstock trading operations.

Cross-platform Mobile2025 — Present

FatHopes Vendor App

One Flutter codebase for collectors & vendors, on every device.

A cross-platform app (iOS / Android / Web) powering used-cooking-oil collection in the field — with the reliability logistics teams need in the real world.

  • Real-time collector GPS tracking
  • In-app payments & withdrawals (Xendit / BillPlz)
  • Face-recognition onboarding
  • 9-language localization
  • Push notifications (FCM)
FlutterDartGraphQLFCM
Web Platform2025 — Present

Vendor & Energy-Trading Portals

Next.js portals for onboarding, purchasing & digital contracts.

Two production portals that run vendor onboarding and energy-feedstock trading — from first KYC step to a legally-signed contract, with access scoped to each role.

  • Multi-step KYC workflows
  • Negotiated purchase requests
  • HMAC-sealed digital e-signatures
  • Role-based access control (RBAC)
Next.jsReactTypeScriptTailwind
Backend / API2025 — Present

Type-safe API Platform

Nitro + Prisma services the whole product is built on.

The GraphQL & REST layer behind the apps and portals — designed type-safe end-to-end, hardened with request signing, structured logging and error tracking.

  • GraphQL (Yoga) & REST APIs
  • Prisma ORM across 3 databases
  • JWT / OAuth SSO + request signing
  • Winston logging · Sentry tracking
Node.jsNitroGraphQLPrismaPostgreSQL
Data & Dashboards2025 — Present

WRMS Analytics

Turning waste-resource operations into decisions.

Analytics dashboards for a waste-resource management platform, plus a hand in modernizing a legacy LoopBack 4 / React stack toward Nitro + Next.js.

  • deck.gl geospatial visualization
  • ECharts & Recharts dashboards
  • LoopBack 4 → Nitro / Next.js migration
  • PowerBI reporting
Reactdeck.glEChartsLoopBack 4
Journey

Where I've worked

  • Full-Stack Developer · FatHopes Energy

    Nov 2025 — Present

    Subang, MalaysiaCurrent

    Building and maintaining the web & mobile platforms behind FatHopes Energy's UCO collection and energy-feedstock trading across multiple countries — end-to-end, from schema and API design to the interfaces vendors and internal teams use daily.

    TypeScriptNext.jsReactFlutterNitroGraphQLPrismaAzure

  • Back-End Developer · Juta Teknologi

    Nov 2024 — Nov 2025

    Selangor, Malaysia

    Owned backend development, database integration, server logic and API design. Optimized system performance, handled bug tracking & resolution, and supported the team through testing and technical guidance.

    Node.jsAPIsDatabasesSystem Integration

  • Chatbot Developer · Juta Teknologi

    Feb 2024 — Jul 2024

    Shah Alam, Malaysia

    Designed and implemented AI-driven chatbots for businesses — building conversational workflows, integrating AI with business processes, and deploying reliable experiences for clients.

    AI ChatbotsNLPIntegrations

  • Computer Technician · Cabletronic Computers

    Jan 2021 — Jun 2021

    Seremban, Malaysia

    Diagnosed hardware and software issues, carried out repairs on laptops and PCs, and ensured timely delivery of serviced devices to clients.

    HardwareDiagnosticsRepair
Education

Studied at UiTM

Universiti Teknologi MARA — from a diploma through to a Master's in Information Technology.

Oct 2024 — Feb 2026

Master of Science in Information Technology

Information Technology

Universiti Teknologi MARA

Mar 2022 — Aug 2024

BSc (Hons) Information Systems

Intelligent Systems Engineering

Universiti Teknologi MARA

Oct 2018 — Sep 2021

Diploma in Computer Science

Computer & Information Sciences

Universiti Teknologi MARA

Contact

Let's build something worth shipping.

Open to work in clean energy, logistics & fintech. Whether it's an idea, a role, or a collaboration — my inbox is open.

[email protected]Download CV