IoT / Data Platform Engineer, Tokyo

I build the path from a sensor to a screen.

Devices that talk MQTT, pipelines on AWS that keep the data honest, and Flutter or web apps that make it useful. Ten years of shipping across Indonesia and Japan.

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Currently: Sr. Associate, IoT / Data Platform Engineer at Cognizant Japan

Adam Rabbani Adnan standing under a bare tree in a Japanese park in early spring

10+

years building software and hardware
12

products and platforms built
1

granted patent (IoT home security)
3

working languages: Indonesian, English, Japanese

Selected work

Projects that shipped

Battery swap networks, power bank sharing, a home security system that became a patent, and a Kubernetes platform in progress.

All projects

Toolbox

What I work with

Years are hands-on years in production or serious side projects, not tutorials.

Programming languages

Go 5+ yrs
Java 5+ yrs
Dart 5+ yrs
Rust 3+ yrs
TypeScript 2+ yrs
Python 2+ yrs
Swift 2+ yrs
C# / .NET 1+ yrs
Kotlin 1+ yrs
C++ 1+ yrs

Cloud and AWS

AWS IoT Core 3+ yrs
AWS Lambda 3+ yrs
Amazon S3 3+ yrs
Amazon Timestream 3+ yrs
Amazon DynamoDB 3+ yrs
Amazon Athena 3+ yrs
AWS Glue 3+ yrs
Amazon OpenSearch 3+ yrs
Amazon QuickSight 3+ yrs
Amazon CloudWatch 3+ yrs
Amazon Bedrock 3+ yrs
Firebase 3+ yrs

Platform and infrastructure

Docker 5+ yrs
Kubernetes 3+ yrs
Grafana 3+ yrs
GraphQL 3+ yrs
Kafka 2+ yrs
Nginx 2+ yrs
HAProxy 2+ yrs
Git / CI/CD 5+ yrs

IoT and embedded

MQTT 5+ yrs
ESP8266 / ESP32 5+ yrs
Arduino 5+ yrs
Raspberry Pi 3+ yrs
LabVIEW 1+ yrs
MATLAB 1+ yrs

Mobile

Flutter 5+ yrs
iOS (Swift) 2+ yrs
Android (Kotlin) 1+ yrs

Data

PostgreSQL / MySQL 5+ yrs
Microsoft SQL Server 1+ yrs
NoSQL 3+ yrs
Power Query 1+ yrs

Career

Where I have worked

Dec 2025 - Present

Sr. Associate, IoT / Data Platform Engineer and Senior Full-Stack Programmer

Cognizant Japan K.K. Tokyo, Japan
Jul 2024 - Dec 2025

Back End Developer

Sumitomo Mitsui Banking Corporation (SMBC) Tokyo, Japan
Sep 2021 - Present

Full Stack Developer

CODE.ID (PT Code Development Indonesia) Remote (Jakarta, Indonesia)
Feb 2020 - Jan 2023

Mobile Application Developer

CODE.ID (PT Code Development Indonesia) Jakarta, Indonesia
2018 - Present

Founder, IoT products and training

Nano Sky Group Lampung, Indonesia
Jul 2017 - Aug 2017

Research and Development Intern, Satellite Technology Center

LAPAN (Indonesian National Institute of Aeronautics and Space) Bogor, Indonesia

Full story

Credentials

Patent and certifications

Granted patent

Device for IoT based home security monitoring

IDS000002928

A simple patent (paten sederhana) granted by the Directorate General of Intellectual Property of the Republic of Indonesia for the home security device developed during my thesis at Universitas Lampung.

About the patent