Ega Guntara — IoT & Embedded Engineer

The journey so far

Employment Freelance, alongside the day job

Each role opens into the full detail — the same depth as my LinkedIn, without the scroll.

2022

Nov 2022 – Present

FULL-TIME

CHAPTER 3 · TESTING AT SCALE

IDEMIA

Senior QA Engineer (QA 2), Mar 2026 – now · QA Engineer (QA 1), Nov 2022 – Mar 2026

I joined to test SIM cards and found a job that touches everything: personalization, APDU validation, live 3G/4G/5G attach, OTA updates and eSIM lifecycle on SM-DP/SM-SR. As a senior I lead validation of eUICC, iSIM and IoT products.

Built a 24-hour NVM endurance automation that made overnight testing possible — now used in about 90% of NVM projects.
Replaced manual workflows with OBTANA Web, the eUICC Provisioning Tool and the NVM Script Editor, turning up to three days of preparation into minutes.
Point of contact and trainer for interns across two intakes, and support for IDEMIA teams in Noida, France and Manila.

▶Full detail — what the role actually involved

Validation & test execution

Validate UICC/eUICC (SIM/eSIM) card OS and applets end to end on live 3G, 4G, 5G and NB-IoT networks for international mobile operators, down to APDU level with COMPRION tooling.
Run feasibility studies against 3GPP, ISO 7816, ETSI and GSMA SGP specifications, and decide what a product can and cannot be asked to do before the test plan is written.
Test eSIM remote provisioning against live SM-DP/SM-SR platforms (GSMA RSP), including profile download, enable/disable, and recovery from states the card and the platform disagree about.
Bring up test devices on Quectel, u-blox, Rolling Wireless and Nordic modules over AT commands, and analyse SIM traces and APDU exchanges when a failure is not where the log says it is.
As a senior, lead validation of the non-conventional products — eUICC, iSIM and IoT — where there is no existing test set to inherit.

Planning, reporting & process

Design and maintain test cases in Jira/Xray, plan the execution, and author the ATD and ATR documents that release a product.
Run regression across applet versions, card OS releases and modem configurations, and keep the test set honest — trimming coverage that no longer earns its runtime.
Work in Scrum and Kanban with the development and project teams, and report status to the people who decide whether a product ships.

Tooling & automation

NVM endurance automation — Python over AT commands running unattended 24-hour cycles on 5G modems, so engineers collect logs the next morning instead of sitting with the bench. Now used on roughly 90% of NVM projects.
eUICC Provisioning Tool — the team's main tool for eUICC projects. Cuts stuck-ICCID recovery from six manual steps across two tools to a few clicks (Django, PostgreSQL, corporate LDAP, Jenkins, Docker).
OBTANA, OTA test platform — pooled the shared 2G test handsets behind a browser tab (Flask, MQTT, Redis, Raspberry Pi), removing the fragile local Python setup every tester used to maintain.
NVM Script Editor and Validator — converts COMPRION trace logs into DLL-ready .pcom scripts, replacing up to three business days of manual editing, and corrected a length defect in all 22 GET IDENTITY commands of a ~20,000-command capture.

Mentoring & cross-site support

Point of contact and trainer for interns over two intake terms — onboarding, test method, and reviewing their work.
Support other IDEMIA sites (Noida, France and Manila) on applet testing, board flashing and module bring-up.

2023

Jan 2023 – Sep 2025

FREELANCE

SIDE TRACK · ALONGSIDE IDEMIA

Team Aligness

IoT Engineer & Project Lead · Freelance, alongside my role at IDEMIA

An independent engineering team I took paid IoT work with outside office hours — three client systems and two internal builds, each one from the electrical panel up to the dashboard. We closed it in September 2025; the delivered systems are still in service.

Led the Smart Greenhouse build for a Ministry of Agriculture programme — in operation at five sites since 2024.
Designed the flood and water-tank system, and architected an industrial power monitor for a power-plant client.
Led a two-person BLE attendance tracker to working prototype, plus an ESP32-C3 smart-plug R&D build.

▶Full detail — what the role actually involved

Smart Greenhouse — Ministry of Agriculture

Project lead. Five sites in operation since 2024.
Designed the electrical control panels — component selection, wiring, UPS sizing — and the control path that arbitrates automatic versus manual at the power layer, because the commercial fertigation controller exposed no API.
Co-developed the ESP32/FreeRTOS panel firmware, CO₂ and light sensor nodes on a custom binary protocol, a motorised shading net with a hardware interlock, and fleet-wide OTA updates.

Flood & Water-Tank Monitoring

System design and firmware. ESP32 nodes with ultrasonic and float sensors publish over MQTT.
An ESP32-P4 wall panel (LVGL, TLS, C on ESP-IDF) decides and commands two tanks, four solenoid valves and the flood pump, which run unattended.

Industrial Voltage & Current Monitoring — power plant client

System architect. MQTT ingestion from 16 power-sensor lines (64 data streams).
Impedance calculated with residual compensation against distance-relay protection zones, stored in MongoDB, and plotted on a Dash dashboard with editable setpoints and alerts — inside a one-second end-to-end budget.

BLE Attendance Tracker — confidential client

Project lead, team of two, delivered as a working prototype.
Raspberry Pi scanner written from scratch in Python: identity from the iBeacon UUID rather than the randomised MAC address, enter/exit from an RSSI trend against a threshold, XML reports over FTP every 60 seconds.

WiFi Smart Plug — internal R&D

ESP32-C3 firmware in C on ESP-IDF, SSR relay control, BL0937 power metering, TLS-secured MQTT, two-stage provisioning, and a custom 2-layer PCB.

2021

Jun 2021 – Nov 2022

FULL-TIME

CHAPTER 2 · BUILDING HARDWARE

PT Len Industri (Persero)

Embedded System Engineer

Embedded systems for the GCI (ground control intercept) IFF/SSR radar programme, in consortium with PT LAPI ITB, PT RTI and PT Infoglobal for Ministry of Defence R&D.

Designed the Transmit/Receive module on an FPGA board (Vivado) and wrote its firmware in C using Vitis IDE.
Designed the UDP communication between the TR modules and the beam controller, and the TR module PCB in Eagle.

▶Full detail — what the role actually involved

What the work involved

Processed radar-captured data together with the data processing team.
Wrote the project specification documentation for the module.
Worked inside a defence R&D consortium, where the interfaces between four organisations mattered as much as the hardware.

2021

Apr 2021 – Jun 2021

FULL-TIME

CHAPTER 2 · BUILDING HARDWARE

Widya Robotics

Hardware Engineer

Hardware and software for a 3D Concrete Printing (3DCP) machine.

Developed the machine across Arduino, Raspberry Pi, STM32 and LPC1768 boards.
Modified Marlin firmware for the printer configuration and wrote a Python G-code generator.

▶Full detail — what the role actually involved

What the work involved

Supported the STM32–LPC1768 communication in C/C++.
Ran functional testing on both the electronics and the software side, and troubleshot faults across the 3DCP system.

2019

Jul 2019 – Sep 2019

INTERNSHIP

CHAPTER 1 · FIRST BOARDS

PT Lievee Ciptatama Indonesia

Internship Program — Hardware Engineer

Where the hardware habit started: a lift sub-system, built on Arduino, STM32 and Raspberry Pi.

Developed a lift sub-system with relay control in C and Python.
Designed and reviewed the PCBs in Eagle — alongside university robotics competitions in Indonesia and Tokyo.