Torii
A lightweight, type-safe API gateway written in Go. Powers a handful of small Japanese SaaS teams.
GogRPCOpenTelemetry
Available for select engagements Β· 2026
Building robust software at the intersection of German engineering precision and Japanese tech innovation.
I'm Lukas Weber β a German software engineer based in Tokyo. I design and ship pragmatic, high-quality systems for teams that value both craft and speed.
- 8+
- Years shipping
- 3
- Countries worked
- 40+
- Projects delivered
~/tokyo β zsh
// greetings across timezones
$ whoami β engineer β’ designer β’ perpetual learner
01 Β· About
A bridge between two engineering cultures.
LW
36.204Β° NTokyo Β· JST138.252Β° E
I grew up in Munich, studied Computer Science in Karlsruhe, and moved to Tokyo in 2021 to join a fast-moving startup. I've built payment infrastructure, developer tools, and consumer products for teams ranging from four engineers to four hundred.
My work sits at a specific seam β bringing the discipline of documented architecture, thoughtful testing, and clean interfaces into the velocity of Japan's product ecosystem. I write in three languages and think in systems.
π©πͺ
Efficiency-driven
Rigorous, test-backed engineering habits from years in German product teams.
π―π΅
Local market fluency
Working in Tokyo β comfortable in bilingual JP/EN environments and workflows.
π»
Full-stack range
From typed frontends to Go & Rust services, plus the DevOps to ship them.
π§
Product-minded
I optimise for user outcomes, not lines of code β trade-offs, always.
02 Β· Experience
A career shaped across borders.
From research labs in Karlsruhe to product teams in Tokyo β a decade of shipping.
- Designed a multi-region event pipeline processing 40M events/day
- Reduced P95 API latency by 62% via query planner rework
- Mentored 5 engineers; introduced RFC-driven design reviews
GoTypeScriptPostgreSQLAWSKafka- Owned the ledger service β 99.99% uptime over 18 months
- Shipped PCI-DSS compliant tokenisation layer
- Introduced trunk-based delivery, cutting release cycle from 2w to daily
RustGogRPCKubernetes- Architected the multi-tenant frontend used by 200+ enterprise customers
- Implemented role-based access control across services
- Grew engineering team from 3 to 12, defined hiring rubric
ReactNode.jsTypeScriptPostgreSQL- Co-authored 2 publications on adaptive UI systems
- Delivered client prototypes for automotive HMI
PythonC++React
03 Β· Tech Stack
Tools I reach for.
A curated, opinionated toolkit β favouring longevity, type safety, and observability.
TypeScript
Frontend
React
Frontend
Next.js
Frontend
Tailwind CSS
Frontend
Go
Backend
Rust
Backend
Node.js
Backend
PostgreSQL
Backend
AWS
DevOps
Docker
DevOps
Kubernetes
DevOps
Terraform
DevOps
Git
Tools
Figma
Tools
Linear
Tools
Neovim
Tools
04 Β· Projects
Selected work & experiments.
Open-source libraries, side projects, and tools I use daily.
Kanji Grid
A spaced-repetition kanji trainer with an offline-first PWA. 12k monthly active learners.
ReactTypeScriptIndexedDB
Ledger.rs
Double-entry accounting primitives in Rust β the core behind two production ledgers.
RustPostgreSQL
Shinkansen CLI
A blazing-fast CLI for orchestrating multi-service Docker environments on Apple silicon.
RustDocker
Kata Studio
A collaborative code-review playground for engineering teams that want deep feedback loops.
Next.jstRPCPostgres
Wabi Notes
A minimal, keyboard-first note-taking app inspired by traditional Japanese design principles.
TauriSvelte
05 Β· Contact
Let's build something together.
Freelance projects, collaborations, or a quiet cup of coffee in Shibuya β always open to a good conversation.
Email
hello@lukasweber.dev
// office hours
Mon β Fri Β· 09:00β18:00 JST
Replies within 24h Β· EN / DE / basic JA