Darmawan Zulkifli

1. Mar 2024 — Present

   Sydney, NSW (remote)

   Software Engineer

   /

   Alexys International

   • Product champion for Aptus Aware, responsible for what the product should be, not only for how it gets built.
   • Built the Matrix.org proof of concept for the messaging backend, then reviewed and migrated backend code onto it.
   • Extended location-aware presence, hunt-group routing and nurse-call configuration across both organisation-managed and personal handsets.
   • Own the integration of Aptus Aware with Aptus Concierge, including its AI layer.
   • Build features, fixes and backend services for the mobile product.
   • Own release hygiene end to end, covering version control, testing to standard, releases, and issue tracking.

   • Flutter
   • Matrix.org
   • Node.js
   • AI integration

2. Mar 2022 — Mar 2024

   Singapore

   Software Engineer

   /

   Undercurrent Capital

   • Built and ran the Algorai Admin platform, the operational surface for configuring products, monitoring positions and reconciling on-chain state.
   • Owned the reconciliation seam between on-chain state and the application store, so the chain and the database that recorded it could not silently drift apart.
   • Integrated Algorai with the Algorand blockchain using the official SDK.
   • Built the Go REST services behind the platform on Gin and gorilla/mux, layered along SOLID lines. Thin HTTP handlers, business logic in services behind interfaces, and MongoDB access in repositories, so each layer could be tested and replaced on its own.
   • Built decentralised applications on Algorand, with React front ends over smart-contract backends, enabling on-chain trading and asset management.
   • Built the trading machinery: DEX integrations, order matching, limit and market orders, and liquidity pools using Algorand atomic transfers.
   • Built cross-chain bridges and integrations (Ethereum, Solana, Polygon) so users could swap assets across networks while minimising slippage.
   • Designed secure wallet connections (Pera Wallet, MyAlgo) for transaction signing, staking and real-time trading.
   • Optimised for high-frequency trading, with oracle price feeds, transaction batching, and reduced confirmation times.

   • Golang
   • Gin
   • gorilla/mux
   • React
   • MongoDB
   • Algorand
   • Smart contracts

3. Mar 2021 — Mar 2022

   Bali · Lombok · Sweden

   Software Engineer

   /

   Dua Digital

   • Spearheaded project planning and estimation, effectively catering to a predominantly European clientele.
   • Built Kupongfia, a Swedish grocery-deals app, with React Native for cross-platform delivery.
   • Engineered robust systems tailored to client specifications using Flutter for cross-platform delivery (web, Android, iOS).
   • Developed high-performance backend services leveraging Golang and Node.js.

   • Flutter
   • React Native
   • Golang
   • Node.js

4. Feb 2021 — Aug 2021

   Jakarta, Indonesia

   Software Engineer

   /

   Castellum Digital Indonesia

   • Built a COVID-19 contact-tracing app with React Native.
   • Deployed and maintained the DHIS2 health information system with HISP Indonesia.
   • Optimised queries for external processes and maintained database performance.

   • React Native
   • DHIS2
   • PostgreSQL

5. Mar 2019 — Jul 2021

   Jakarta, Indonesia

   Software Engineering Team Lead

   /

   PT Citra Digital Lintas

   • Led feature delivery and product maintenance across enterprise and government office-automation products.
   • Worked directly with clients on feature planning and estimation, translating ambiguous requirements into scoped work.
   • Owned application releases and deployment into staging and production environments.

   • Golang
   • React
   • Flutter

6. Jan 2018 — Mar 2019

   West Nusa Tenggara, Indonesia

   Software Engineer

   /

   Lumbung Inovasi

   • Talked to clients directly to understand what they actually needed, then translated it into product requirements the team could work from.
   • Delivered project-based software from requirements through to a working product.

   • Python
   • Django
   • Node.js
   • Flutter
   • Kotlin

7. Jun 2017 — Aug 2018

   Mataram, Indonesia

   Fullstack Developer

   /

   Sol Interactive

   • Built and maintained full-stack web applications.
   • Installed and set up CCTV systems for clients.
   • Managed servers and handled networking setup and maintenance.

   • Python

• 01 2024—

  Aptus Aware

  Clinical communications for care teams — moving nurse call, presence and escalation off the wall panel and onto the handsets staff already carry.

  • Flutter
  • Matrix.org
  • Node.js
• 02 2022

  Algorai Finance

  An on-chain finance platform on Algorand — bringing structured financial products to retail, not just institutions.

  • Golang
  • React
  • MongoDB
• 03 2023

  Tapp Exchange

  A community-driven decentralised exchange for the Aptos ecosystem, powered by a self-optimising ve(3,3) model.

  • Rust
  • Golang
  • React

beacon_broadcast (Dart, fork) · ws-wrapper (Go) · toldata (Go, fork) · xlsx_utilities (Go) · matrix-dart-sdk (Dart, fork) · jspdf-generator (TypeScript)

04 — Technical skills

Languages

Go · Rust · TypeScript · Dart · JavaScript · Python · PHP · Kotlin · Java · SQL

Backend

Gin · gorilla/mux · Django · FastAPI · Laravel · gRPC · Protobuf · Kafka · NATS · RabbitMQ · Matrix.org · REST

Frontend

React · Next.js · Astro · Tailwind

Mobile

Flutter · React Native · Expo · BLoC · Riverpod · GetX

Design

SOLID principles · Dependency injection · Layered architecture · Unit testing

Data

PostgreSQL · MongoDB · Redis · Firestore

Platform

Docker · Kubernetes · Linux · Bash · GCP · AWS

Chains

Algorand · Aptos · Story Protocol

AI

LLM integration · Voice agents · On-prem inference

Embedded

ESP32 · Microcontrollers

05 — Community & teaching

• Feb 2018 — Aug 2019

  West Nusa Tenggara, Indonesia

  DSC Lead

  /

  Developer Student Club

  A Google community programme for Indonesian university students. Selected as a DSC Lead directly by the programme manager.

• Mataram, Indonesia

  Lead, Linux Community

  /

  Universitas Bumigora

  Ran the university Linux user community.

• Jan 2017 — Jun 2018

  Mataram, Indonesia

  Lecture Assistant

  /

  Universitas Bumigora

06 — Education

• 2015 — 2019

  Bachelor of Engineering (BE), Computer Engineering

  Universitas Bumigora

• Certification

  Kotlin for Android — Beginner to Advanced