FOUNDER & ENGINEER
CEO of PT Lensiro Digital Solusi. Building products that bridge Indonesia and Japan.
I build products and lead engineering teams across Indonesia and Japan.
I'm Alvin — a 27-year-old Indonesian tech founder based in East Java. I run PT Lensiro Digital Solusi, an ERP/POS SaaS for optical stores, and manage offshore engineering teams bridging Indonesian engineers with Japanese enterprise clients. When I'm not shipping code, you'll find me writing about infrastructure on my blog or tinkering with my Apple Silicon LLM cluster.
Based in
Lumajang, East Java
Role
CEO — PT Lensiro Digital Solusi
Languages
EN / JP / ID
alvinendratno@gmail.com
Full Stack Engineering
React, Node.js, Ruby on Rails, AWS. Writing code since age 13.
Machine Learning & AI
Built a 200-node Apple Silicon LLM inference cluster. Hands-on ML research.
Technical Leadership
Managing offshore engineering teams. Bridging cultures between Indonesia and Japan.
Lensiro
CEO — PT Lensiro Digital Solusi
0+
Optical stores
ERP/POS SaaS built specifically for Indonesian optical stores. Full feature set: inventory, multi-branch, POS, membership, financial statements, supplier & sales analytics.
200-Node LLM Cluster
Biggest Feat — Built for Baseconnect
0
Apple Silicon nodes
Turned 12 dusty MacBooks into a 200-node Apple Silicon inference farm that now carries 25% of production LLM traffic. Stack: Ollama, HAProxy, Ansible, Prometheus + Grafana — all without a data-center contract.
Offshore Engineering
Bridging Indonesian talent with Japanese enterprise
Subcontracting and leading technical teams for Japanese enterprise companies. Bridging Indonesian engineering talent with Japanese business culture through JLPT N1 fluency and years of experience living in Japan.
N1
JLPT Level
8
Engineers managed
PT Lensiro Digital Solusi
A research-driven technology company focused on digitizing Indonesia's retail optical industry. We started with a simple question: why are optical stores still using systems that weren't designed for them?
From Research, Solutions Are Born
Generic POS systems don't understand optical workflows — faceting & QC, prescriptions, or lens management. We talked directly to store owners, opticians, and staff. We studied their workflows, understood their pain points, and only then built Lensiro — a platform truly made for the optical industry.
Not generic software forced to fit. But a solution that grew from deep understanding.
0+
Optical stores using Lensiro
3
Outsourcing partner companies
1
Platform for all optical needs
Lensiro Platform
All-in-one SaaS for optical stores — from POS, inventory, faceting & QC, membership, multi-branch, accounting, to analytics. Everything integrated in one system.
Development Partner
Trusted as a technology development partner by enterprise companies, including clients from Japan such as Baseconnect, Inc. Our team is experienced in building large-scale systems with international standards.
Education
2016 — 2018
Japanese Language
OBKG
2018 — 2021
Computer Science / Network
Kyoto Computer College
2021 — 2023
Master — Web Business
Kyoto Institute of Information Science
Certifications & Awards
IPA Basic Engineer Test
IPA
AWS Cloud Practitioner
AWS
AWS Solutions Architect — Associate
AWS
AWS Developer — Associate
AWS
AWS SysOps Administrator — Associate
AWS
Winner — Trigger Hackathon
Sansan, Inc.
AWS Solutions Architect — Professional
AWS
AWS DevOps Engineer — Professional
AWS
AWS Database — Specialty
AWS
Technical Skills
Experience
2024 — Present
CEO
Leading product development and business strategy for Indonesia's optical store ERP/POS platform. Serving 62+ stores. Baseconnect, Inc. is among our enterprise clients.
2019 — 2024
Intern → Engineer
Baseconnect, Inc.
Rose from intern to engineer. Built a 200-node Apple Silicon LLM inference cluster. Bridged Indonesian engineers with Japanese enterprise clients.
2021
AWS Startup Community Speaker
Amazon Web Services
Gave a lightning talk at the AWS Startup Community event about cloud architecture.
Thoughts on AWS, infrastructure, and building things that work.
Building a Stock System That Cannot Be Wrong
How I designed an inventory system with zero-tolerance for stock discrepancies — using event sourcing and strict validation.
Building a 200-Server Local LLM Cluster
Turning 12 idle MacBooks into a 200-node Apple Silicon inference farm carrying 25% of production traffic.
Managing Snowflake's Procedure & UDF with Github
A CI/CD workflow for managing Snowflake stored procedures and UDFs using GitHub Actions.
Let's connect
Whether it's business or private, I'm always open to new conversations and opportunities.