PROFILE

STORY OF MY LIFE

YOUR RESILIENT NEXT-DOOR ENGINEER | FULL-STACK & IOT SYSTEMS

Hey, I'm Yohanes Edwin - but most people just call me Ed. I'm a software engineer who enjoys solving hard problems, building systems that actually scale, and finding that sweet spot where performance, cost, and maintainability all line up.

I've gone from being the guy fixing bugs and keeping the lights on, to leading teams and shaping the architecture behind products used across thousands of stores. Along the way, I've scaled an IoT platform from offline deployments to a centralized cloud model, making it possible to support international customers from a single base in Taiwan. I also designed AURA, a next-gen multi-tenant platform built to replace a costly legacy system. Within about a year, our team brought AURA from proof of concept to production, migrating 820 retail stores and achieving ~76% lower monthly platform infrastructure costs compared to the legacy system. Before that, I led engineering as CTO of Pekku.com, Southeast Asia's first instant website builder, where I rebuilt the system to be 4x faster and cut server costs by ~10%.

What I've learned is that great engineering isn't just about writing code - it's about solving real-world problems under pressure, mentoring others, and making decisions that balance today's needs with tomorrow's growth.

Outside of work, I like to travel, hike mountains, and play weekend badminton. It keeps me grounded and reminds me there's more to life than just code.

Now that you know more or less about me, do you find what you are looking for? If not, my contact is wide open. Whether it's programming or travel talk, just hit me up!

Contact Me Download Resume

WHAT CAN I DO?

BE FRIENDS WITH YOU

PROJECT ANALYSIS

WEB DEVELOPMENT

BRIGHT IDEAS

APP DEVELOPMENT

MAINTENANCE/BUG FIXING

RESUME

EDUCATION

National Dong Hwa University, Taiwan
(2012 - 2014)

Major Computer Science
GPA 4.34 of 4.50
Degree Master of Science

Petra Christian University, Indonesia
(2007 - 2011)

Major Informatics
GPA 3.21 of 4.00
Degree Bachelor of Informatics

Santa Maria Senior High School, Indonesia
(2004 - 2007)

Major Science
GPA 80.23 of 100
Degree -

EXPERIENCE

Technical Manager / April 2025 - Present
雲創通訊股份有限公司, 竹北市, Taiwan

I initiated and lead the development of AURA, M2COMM's IoT platform built to replace its costly legacy ELSA system with a scalable, multi-tenant architecture. The old model required a separate application instance for each retail store, making scaling inefficient and driving up cloud expenses.

I designed AURA's architecture from the ground up, including database schema, high-availability planning, and end-to-end workflows from coding to deployment. Unlike the legacy system, AURA consolidates store operations onto a shared platform, enabling substantial cost savings and long-term scalability.

I remain hands-on with coding while mentoring engineers across frontend, backend, and DevOps disciplines. My role bridges technical design and business needs: I make key architectural decisions based on customer and stakeholder requirements, ensuring the product evolves in line with real-world use cases.

Within approximately one year, our team brought AURA from proof of concept to production, delivering the core features and workflows needed to replace ELSA. By September 2026, we had migrated 820 stores from a single retail brand to AURA, achieving approximately 76% lower monthly platform infrastructure costs (US$9,900 to US$2,370). A separate rollout to two additional subsidiaries, covering 390 stores, is underway.

Beyond architecture and development, I investigate complex, difficult-to-reproduce customer issues, performance bottlenecks, and infrastructure problems. I implement hotfixes and permanent solutions when needed, while identifying preventive measures to improve system reliability.

I integrate generative AI into my software engineering workflow, spanning architecture, implementation, debugging, code review, testing, and documentation. I develop custom AI agent skills to streamline tasks and automate repetitive processes, while maintaining engineering accountability through manual code reviews and focused testing of AI-generated changes.

Senior Web Application Engineer / 2018 - March 2025
雲創通訊股份有限公司, 竹北市, Taiwan

I scaled M2COMM’s IoT platform from offline deployments to the cloud, enabling global customer support from Taiwan without the need for overseas offices. This shift marked a turning point for the company, transforming how we delivered and supported international clients.

Along the way, I drove key optimizations such as redesigning core processing jobs to boost performance by over 50%, migrating applications from Windows to Linux for greater stability, and introducing MQTT-based architecture to support projects with leading telecom operators. I also resolved critical reliability issues, including database corruption prevention and crash recovery, which significantly improved platform resilience.

Beyond optimization, I delivered major product features and integrations. These included building new data-processing modules for major retail chains in Taiwan, designing an API dispatcher for third-party system integrations, and launching tools such as planogram management, office hours automation, and NFC-based retail features. I also contributed to projects for a large duty-free retailer and a leading electronics manufacturer, while collaborating with teams across Taiwan and abroad — including with partners in France and ComQi in North America.

This cloud transition was one of my most impactful contributions. While it unlocked global reach and efficiency, it also revealed the challenge of escalating cloud expenses at scale — a challenge that later became the driving force behind my leadership of AURA as Technical Manager.

Chief Technology Officer / May 2016 - 2019
PT. Davinti Indonesia, Surabaya, Indonesia

I rebuilt Southeast Asia’s first instant website builder into a faster, more cost-efficient platform — making it 4× faster and cutting server costs by about 10%. As CTO, I guided the technical direction while staying hands-on with development, ensuring strategic decisions were backed by practical execution.

I led the engineering team with a strong focus on code quality and release stability, consistently delivering projects with minimal defects. Beyond the technical side, I collaborated closely with the founders to align product vision with business priorities, scaling the platform to support rapid growth while maintaining reliability.

My role required balancing leadership with coding, bridging strategy and execution to keep the platform efficient, stable, and user-friendly.

Backend Web Developer / September 2014 - April 2016
PT. Davinti Indonesia, Surabaya, Indonesia

I kept the platform stable and evolving, fixing bugs, improving performance, and developing new features in collaboration with product and design teams. My contributions laid the groundwork for the large-scale optimizations that later enabled major performance gains.

By taking ownership of technical challenges and proactively solving problems, I built the trust and capability that led to my promotion into the CTO role. From there, I continued driving both the technical and strategic growth of the company.