Smash Browser
Super Smash Bros. Melee running in the browser with no emulator: the decompiled game compiled to WebAssembly with Emscripten, GameCube graphics translated to WebGPU, AudioWorklet audio and OPFS storage.
OPEN ↗Adam Rais — Senior Full-Stack Software Engineer
Experience
13 years shipping fast, accessible products in Tokyo, Berlin and London.
Tofu · Senior Engineer
May 2024 – present · Tokyo · AI-driven accounting automation
- Replaced LLM document categorization (~100K docs/month) with a fine-tuned mBERT model served via ONNX Runtime with a confidence-gated LLM fallback: ~10 min → 8 s (75× faster), 90%+ cheaper (~US$10K/year saved).
- Built an AI sales agent grounded in Whisper transcripts of real sales calls (RAG + style-guided prompting); 18% of chats convert to paid sign-ups.
- Made 100% of the product operable through chat with a tool-calling agent mapped to every UI action, and shipped an MCP server so users can run the platform from Claude and ChatGPT.
- Initiated and led the move from invite-only to self-serve sign-up and payment: monthly sign-ups 5× (~20 → 100 in the first month).
- Built an Excel-style editor (virtualized 100K+ rows, undo/redo, paste from Excel) on an OCR + LLM extraction chain; per-user pgvector RAG lifted field accuracy 91% → 97%.
- Designed an LLM router (−45% API spend, −60% latency) and a Langfuse / LLM-as-judge evaluation harness (−35% extraction errors); mentored 3 engineers; 99.9% uptime on AWS with Terraform.
- Led a company-wide rebrand and a Tailwind/Radix design system in Storybook: green Core Web Vitals, WCAG 2.2 AA.
- AI video pipeline (LLM scripts, TTS, generative video, Remotion) lifted landing-page conversion 24% and 30-day retention 15%.
- TypeScript
- React
- Next.js
- Tailwind CSS
- Radix UI
- Python
- Rust
- pgvector
- PyTorch
- ONNX Runtime
- LangGraph
- MCP
- Whisper
- Remotion
- AWS
- Terraform
FATMAP · Senior Web Software Engineer
Sep 2017 – Sep 2018 · Berlin · 3D outdoor mapping platform (acquired by Strava in 2023)
The peaks: 3D maps for skiers and climbers — the same kind of rendering that draws this city.
- Engineered 3D terrain and GPS visualizations with Three.js and React, adding level-of-detail tiling and GPU instancing to hold 60 fps on mid-range laptops.
- Built Rails backend services and GraphQL APIs for hundreds of thousands of active users; optimized PostGIS queries to cut route-search latency 70%.
- Served as Data Protection Officer leading GDPR compliance.
- React
- Three.js
- WebGL
- Ruby on Rails
- PostgreSQL/PostGIS
- GraphQL
- Docker
- AWS
Roots
Where it started: London, 2013.
Automata Technologies · Full-Stack Developer · Oct 2013 – Sep 2017 · London
Robotics startup behind Eva, a low-cost 6-axis robotic arm.
- Built the browser app for programming and controlling Eva on a Rails backend — an early React adoption with a Blockly drag-and-drop editor and a Three.js 3D simulator.
- Engineered a low-latency C++/ZeroMQ messaging server for real-time commands and telemetry, and shipped a Python SDK for factory and lab integrations.
Stack
- React
- Three.js
- Ruby on Rails
- C++
- ZeroMQ
- Python
- Jenkins
Education
- BA (Hons) Business and Management — University of Northampton, 2011
- Web Development Immersive — General Assembly, London, 2013
Technical skills
Every shop on this street sells something I ship with.
Frontend
- TypeScript
- React
- Next.js (App Router, RSC)
- Solid.js
- TanStack (Start, Query, Table, Virtual)
- Tailwind CSS
- Radix UI
- Storybook
- Vite
- Three.js
- WebGL
- WebGPU
- Mapbox GL
- WebAssembly
AI / ML
- OpenAI · Anthropic · Gemini APIs
- agents & tool calling
- MCP servers
- RAG
- LLM routing
- LangChain / LangGraph
- LLM evaluation (Langfuse)
- PyTorch
- Hugging Face
- ONNX Runtime
- Whisper
- AI video generation
- recommender systems (ALS, LightGBM)
Backend & Data
- Node.js
- FastAPI
- GraphQL
- gRPC
- REST
- Ruby on Rails
- PostgreSQL (pgvector, PostGIS)
- Redis
Cloud & DevOps
- AWS
- GCP
- Cloudflare Workers
- Docker
- Kubernetes
- Terraform
- GitHub Actions
- OpenTelemetry
- Datadog
Design & quality
- Figma
- design systems & branding
- Core Web Vitals
- accessibility (WCAG 2.2 AA)
- i18n
- TV / 10-foot UI
- Remotion
- Playwright
- Vitest
Languages
- TypeScript
- JavaScript
- Python
- Rust
- Go
- Ruby
- SQL
About me
Frontend-focused full-stack engineer — 13 years across Tokyo, Berlin and London.
I build fast, accessible products across AI-powered accounting, video streaming, satellite analytics, 3D mapping and robotics. Expert in TypeScript, React/Next.js and TanStack, with production Node.js, Rust, Go and Python. I ship AI end to end — fine-tuned classifiers, LLM routing, conversational agents, MCP servers and RAG — and bridge product, design and business.
Recent impact
- 75× faster document categorization
- 5× growth in sign-ups
- 45% faster Solid.js console app
Spoken languages
- English — fluent
- Italian — conversational
- Japanese — basic
Based in
- Tokyo, Japan
Open-source playground
Side projects, built for the fun of it.
Blockies
An online LEGO-style building platform: build brick models in the browser. TanStack Start on Cloudflare Workers.
OPEN ↗House Party 98
A Windows 95 desktop recreated as a web app — windows, taskbar and all.
OPEN ↗adzOS
A micro operating system written from scratch in Rust.
OPEN ↗This city
Procedural 3D city rendered with three.js WebGPU (WebGL2 fallback), TanStack Start, Cloudflare Workers.
OPEN ↗Off the clock
What I tinker with after hours.
- iOS apps in Swift
- Unreal Engine / C++ game development
- Cybersecurity
- Game Boy and CHIP-8 emulators in Rust
- Conway's Game of Life in Rust + WebAssembly
Home is Tokyo. The lights in these windows are the simulation's residents coming and going.