CircuitWall

Java, Spring, JVM performance tuning, big data, real-time processing and machine learning.

Profile

About Me

Andrew Wu · Stockholm, Sweden

I’m Andrew Wu, an Engineering Manager based in Stockholm. I lead AI/ML teams shipping production systems, and I’ve spent the last 15+ years between the JVM, big data, and cloud-native architectures.

I care about two things in roughly equal measure: building teams that ship calmly, and getting the engineering details right so they can.

What I do

Lead and grow cross-functional AI/ML engineering teams
Design MLOps and data platforms that survive contact with production
Advise on JVM performance, big data, and cloud architecture

Get in touch or find me on LinkedIn .

Projects

Side projects I’m actively shipping and tinkering with.

Live le-design.org

LeDesigner

An AI-powered web and mobile app that turns any photo into a buildable 3D LEGO model — segmentation, depth estimation, and brick fitting all running in the browser.

AI Three.js Next.js

Visit site →

Open Source github.com/CircuitWall/jarela

Jarela

A lightweight, self-hosted LangGraph GUI that turns a chat window into a working endpoint — WhatsApp and Gmail bridges, hotloaded LLM providers, and MCP-isolated tools.

LangGraph MCP Self-Hosted

View on GitHub →

Recent Writing

Notes from the field on Java, JVM tuning, Kafka, and applied ML.

May 20, 2026 · 2 min read

Day 6 of Jarela: Making the App Easier to Trust

Day 6 of Jarela: 45 commits that followed through on the integration work, tightened proxy and streaming behavior, and polished the UI so the app feels more dependable.

LangGraphIntegrationsProxy

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May 19, 2026 · 2 min read

Day 5 of Jarela: Tightening the Joints

Day 5 of Jarela: 27 commits focused on proxy support, EventSource streaming boundaries, MCP discovery, hot-loaded providers, and the integration plumbing that keeps things working.

LangGraphIntegrationsProxy

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May 18, 2026 · 2 min read

Day 4 of Jarela: Integrations That Can Live in the Middle of My Work

Day 4 of Jarela: 30 commits focused on Microsoft Graph for mail and calendar, Google Calendar cleanup, and the security work that makes integrations safe enough to keep using.

LangGraphIntegrationsMicrosoft Graph

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May 17, 2026 · 8 min read

Day 3 of Jarela: WhatsApp Bridges, Native Gmail, and a Rebrand With a State Migration

Day 3 of building a lightweight LangGraph GUI. The app stops being a chat window and becomes an endpoint: WhatsApp via Baileys with proper @lid routing, native Gmail with drafts-only sending, hotloaded providers, and a full rebrand from langGUI to Jarela complete with state migration.

LangGraphWhatsAppBaileys

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May 17, 2026 · 7 min read

Day 2 of Jarela: A Real Toolkit, a Real Stop Button, and Why iOS Keeps Killing My WebSocket

Day 2 of building a lightweight LangGraph GUI on my laptop. 44 commits: a real file toolkit, image generation, stop-that-actually-stops, mobile WebSocket survival via SSE reattach, and a lot of 'the agent is lying about being busy.'

LangGraphClaude CodeMulti-Agent

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May 17, 2026 · 6 min read

Day 1 of Jarela: Building My Own Lightweight Claude-Code-ish Replacement

I got tired of how complex my openclaw setup had gotten — too many tools, too many integrations I never used. So I started building a small LangGraph-based GUI for multi-agent workflows on my own laptop. This is day 1: 31 commits, a lot of streaming/reconnection pain, and three different GitHub Copilot auth flavors to untangle.

LangGraphClaude CodeMulti-Agent

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CircuitWall

Java, Spring, JVM performance tuning, big data, real-time processing and machine learning.

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