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Hazrien Nazman designs the circuit board, writes the firmware, builds the backend and leads the team that ships it. Five years in, that work keeps more than 300 unattended machines online for over 20 clients.
SHAH ALAM: Hazrien Nazman's career started at the repair bench: fixing Asus laptops and printers as a technician intern, selling 1,200 Lenovo laptops, and servicing Realme phones and IoT products under warranty. An electronic engineering degree from Universiti Teknologi MARA came in between, and the habit of opening things up to see how they work never left.
Today that habit runs the full length of the stack. At T05 Technologies, Hazrien is product owner and lead developer of the Nebula IoT Management System, which turns vending and other unattended machines into connected devices for more than 20 clients. Hazrien designed its NebulaMQTT controller board in KiCad, wrote the ESP-IDF firmware, and built the Node.js and MQTT backend behind it.
Payments are the other half of the job. Hazrien integrated the UQPAY, Coins.ph and Safaricom gateways into Payrallel, a payment orchestration platform serving 373 merchants and 2,760 terminals, and led the backend of MARS, the voucher and points system redeemed on its vending machines.
On the product side, Hazrien leads a six-person team of backend and frontend developers, scopes releases with clients, merchants and suppliers, and owns five products in production. Revenue from those launches moved T05's Malaysian arm from parent-company funding to self-funded operations, and 95% of issues on deployed products are fixed within 24 hours.
Off the clock, the bench is still busy: an ESP32-P4 desk companion with a live Palworld minimap, a two-node Proxmox homelab, and a team of students mentored to a silver medal at IPITEx 2024. Next on the list is Rust for embedded GUIs.
Each layer has its own edition: Full Stack, Hardware and Business, every one with a résumé to match.
Full Stack Edition
Hazrien integrated UQPAY, Coins.ph and Safaricom into Payrallel, a payment orchestration platform with 2,760 terminals, 15 gateways and up to 37 payment methods, built on Node.js and MongoDB on DigitalOcean. Hazrien also led the backend of MARS, the voucher and points system redeemed on Payrallel-powered vending machines.
Continued in the Full Stack Edition →Hardware Edition
NebulaMQTT, designed in KiCad, connects machines to the Nebula platform. Its successor, NebulaMQTT V2, runs ESP-IDF on an ESP32-S3 with two pulse outputs, one pulse input and two RS232 ports, so machines can log cash payments and accept QR. Firmware R&D raised connectivity and performance by 30%.
Continued in the Hardware Edition →Business Edition
As product owner, Hazrien leads a six-person team of three backend and three frontend developers while personally delivering all PCB and firmware work. Five products are in production, from NebulaMQTT to the T05 Helmet Washer, each run from client request through release and support.
Continued in the Business Edition →| 300+ | machines managed on NIoTMS |
|---|---|
| 20+ | clients on the platform |
| 373 | merchants on Payrallel |
| 2,760 | payment terminals |
| 37 | payment methods |
| 5 | products in production |
| 95% | of issues fixed within 24 hours |
Postman is heavy, slow to start, and charges for team features. So over two days with Claude Code I started building Rustman, a small desktop API client in Rust and Svelte that keeps everything as plain files. Part 1 is the why, the stack, and the first bugs.
Start with Part 1 →Our Google TV box showed ads before it showed Netflix, and the kids had already found every way around YouTube's limits. In two evenings with Claude Code I removed the bloat, put in a cleaner home screen, and wrote a small app that sends TV activity to my Telegram and locks the screen at bedtime.
Read the article →A dual-chip build: the P4 drives the display and app logic while the C6 handles Wi-Fi and BLE. Python bridges on the PC feed it media controls and player positions. May 2026.
In the Hardware Edition →FLORIMS, an ESP32 flash-flood and rainfall monitor that alerts through Telegram, competed against degree, master's and PhD entrants in Thailand.
In the Hardware Edition →