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Senior Full Stack EngineerAvailable for freelance

Dzulfikri Pysal

I build and ship mobile, web, and backend systems, from Flutter field apps to AI agents on WhatsApp. Seven years across agri-tech, enterprise, and compliance, usually as a team of one or two.

Seven years · nine shipped systems · four countries

Open to senior / lead roles

Cyberjaya-based · remote or relocating to Singapore.

Email is quickest. I reply within a day on weekdays.

Current stack

Flutter on the device, Next.js on the web, Go and Node.js behind them, and FastAPI for the AI agents. PostgreSQL, Convex, Docker, and AWS underneath.

  • Flutter
  • Next.js
  • Go
  • Node.js
  • FastAPI
The full toolbox

Experience

  1. 2025 — nowTech Lead · Amphibia Digital
  2. 2023 — 2025Full Stack Developer · YM Global Technologies
  3. 2020 — 2023Flutter Developer · Avarice Teq
  4. 2019 — 2020Django Web Developer · Salesminded
Roles, with the receipts

Selected work

Case studies with the real screens, from a sales-to-cash CRM to a palm oil platform running in four countries.

All 9 projects

Platform · 2026

EngageXS CRM

Sales CRM, inventory, invoicing, and double-entry accounting in one platform, covering the full sales-to-cash cycle for SMEs.

  • Next.js
  • Node.js
  • Golang
  • PostgreSQL

AI agent · 2025

AI WhatsApp Booking Agent

An AI agent that handles golf tee-time bookings over WhatsApp, with a human operator confirming slots and payments from a dashboard. Cuts typing per booking from about 25 minutes to under 10.

  • Convex
  • Next.js
  • FastAPI
  • OpenAI API
  • WhatsApp Cloud API

Field ops · 2025

Palm Oil Platform

Estate management for oil palm: GPS-tagged field capture with offline sync, a Next.js admin with 17 operational reports, and a Go API on SQL Server, one database per estate.

  • Next.js
  • Go
  • SQL Server
  • gRPC
  • Mapbox
  • Docker
  • Grafana

AI agent · 2025

Sigap AI Agent

Self-hosted, embeddable AI support agent that answers from the company's own knowledge base, captures leads, and routes hard questions to a shared team inbox.

  • Next.js
  • Go
  • PostgreSQL
  • Redis
  • OpenAI API
Available for freelance

Open to senior / lead roles · remote or relocating to Singapore

Hiring for a senior or lead role?

I take systems from requirements to production: mobile, web, backend, and AI agents. Tell me about the problem and I will reply within a day on weekdays.