RAS_SYS // v26.05
--:--:-- UTC
SHIPPING ▌ HOSTING GPUs ▌ SOLDERING ▌ WRITING C++ ▌ SELF-HOSTING ▌ HACKING ▌ SHIPPING ▌ HOSTING GPUs ▌ SOLDERING ▌ WRITING C++ ▌ SELF-HOSTING ▌ HACKING ▌ SHIPPING ▌ HOSTING GPUs ▌ SOLDERING ▌ WRITING C++ ▌ SELF-HOSTING ▌ HACKING ▌
LAT 51.5074° N
LON 0.1278° W
PWR 0.73
UPTIME 000:00:00
[ PERSONAL TERMINAL ]   /   [ BOOTED ]

RAPHAEL ARYA
SINAI.

>
STATUS OPEN TO COLLAB
FIELD SYSTEMS · INFRA · COMPILERS
BASED LONDON, UK
OPEN SIGNAL
SCROLL ↓    CTRL+K to jump
// 01

CURRENTLY.

UPDATED 2026-05-18
FOCUS high
OPERATING

TensorHost — running a GPU hosting fleet on Vast.ai with a small team.

  • Building tensorhost-pricing (dynamic pricing)
  • RentalDetector service shipped — store + runner layers
  • Full unit-test coverage, more services queued
WRITING (CODE)

A RISC-V operating system from scratch. RV64 on QEMU + OpenSBI.

  • Phase 0 (bare-metal UART) complete
  • 8-phase roadmap → traps, paging, scheduler, FS
  • Pure C + a touch of assembly
LEADING

Three Imperial societies in parallel — robotics, EEE, and the rover lab.

  • President — ICRS (Imperial College Robotics Society)
  • President — EESoc (Electrical & Electronic Eng. Society)
  • Head — IPRL (Imperial Planetary Rover Lab)
STUDYING

EIE at Imperial — algorithms, compilers, systems.

  • ELEC50010 — Instruction Architectures & Compilers
  • DSP — DFT/DTFT, Z-transforms, FM SNR
  • Parallel algorithms — span analysis, psearch, Master Theorem
// 02

LOG.

ENTRIES --
RANGE 2023 → NOW
  1. 2026 · NOW
    BUSINESS

    Co-founded TensorHost, a GPU hosting business on Vast.ai.

    Running the fleet with colleagues. Building tensorhost-pricing in parallel — a dynamic pricing system, with the RentalDetector service already shipped (store + runner layers, full unit test coverage).

  2. 2026
    LEADERSHIP

    Elected President of ICRS and EESoc.

    Running the Imperial College Robotics Society and the Electrical & Electronic Engineering Society in parallel. Plus Head of IPRL, the Imperial Planetary Rover Lab — ground rover and UAV subsystems.

  3. 2026
    SYSTEMS

    Started a custom RISC-V operating system.

    RV64 on QEMU with OpenSBI. Phase 0 (bare-metal UART) complete; 8-phase roadmap through traps, paging, scheduling, FS. Written from scratch, in the open.

  4. 2025
    COMPILERS

    Built a C-to-RISC-V compiler from scratch.

    ANSI C frontend with Bison/Flex, written in C++. 42-test suite passing, CMake build. The course made me fall in love with compilers properly.

  5. 2025
    INFRA

    Production Kubernetes cluster on Proxmox.

    RKE2 with Grafana, Prometheus, PostgreSQL. Authentik SSO integrated across the K8s Dashboard (via oauth2-proxy) and ArgoCD (OIDC). Self-hosted Outline wiki on CloudNativePG + MinIO sits on top.

  6. 2024
    NETWORK

    Self-hosted Headscale mesh across prod/dev VMs.

    Headscale v0.28 + Headplane v0.6.2, Authentik OIDC, Nginx reverse proxy, Let's Encrypt TLS. ACL policy gates exit nodes and team access.

  7. 2024
    HARDWARE

    Two-day datacenter build.

    OPNsense router, Proxmox migration on HP ProDesk 400 G4 + EliteDesk 800 G2, GPU server BIOS flash, Pterodactyl game server. Plus a custom multi-server KVM — Raspberry Pi 3B + RP2040 Picos + relays + HDMI switch + PiKVM.

  8. 2023
    ORIGIN

    Started EIE at Imperial College London.

    Algorithms, compilers, systems. Picked up a soldering iron in the same week. Haven't put either down since.

// 03

WORKS.

SHOWING 06 of 06
FILTER all
BUSINESS2026 →

TENSORHOST

A GPU hosting business running on Vast.ai. Operating a fleet with colleagues; building a dynamic pricing engine on the side.

→ TENSORHOST.COM
SYSTEMS2026 →

RISC-V OS

An RV64 operating system on QEMU + OpenSBI. Phase 0 done; 8-phase roadmap through traps, paging, scheduler, and a real FS.

→ BUILD LOG
COMPILERS2025

C → RISC-V

A C-to-RISC-V compiler: ANSI C frontend with Bison/Flex, written in C++. CMake build, 42-test suite passing.

→ REPO
INFRA2025

K8S CLUSTER

Production RKE2 on Proxmox: Grafana, Prometheus, PostgreSQL, Authentik SSO across K8s Dashboard and ArgoCD. Outline wiki on CNPG + MinIO.

→ WRITE-UP
NETWORK2024

HEADSCALE MESH

Self-hosted Headscale v0.28 + Headplane v0.6.2. Authentik OIDC, Nginx + Let's Encrypt, ACL-gated exit nodes across prod/dev VMs.

→ NOTES
HARDWARE2024

CUSTOM KVM

Multi-server KVM I designed and built: Raspberry Pi 3B + RP2040 Picos + relays + HDMI switch + PiKVM. Lives in the rack.

→ BUILD LOG
→ FULL CATALOG
// 04

STACK.

TOOLS opinionated
SCOPE daily-use

SOFTWARE

  • C++ / C
  • TypeScript
  • Python
  • RISC-V asm
  • Bison / Flex
  • CMake

INFRA

  • Proxmox
  • RKE2 (Kubernetes)
  • ArgoCD
  • Authentik (OIDC / SSO)
  • Headscale
  • PostgreSQL + MinIO
  • Nginx + Let's Encrypt

HARDWARE

  • HP ProDesk / EliteDesk
  • OPNsense routers
  • Raspberry Pi 3B
  • RP2040 Picos
  • HDMI switches + relays
  • PiKVM

METHOD

  • Self-host where reasonable
  • Hardware where it pays
  • Test before benchmark
  • Ship the boring version
  • Privacy by default
// 05

SIGNAL.

CHANNEL open
LATENCY < 24h

> If you're working on systems, compilers, or building real infrastructure — or you've got an excuse to put a GPU somewhere weird — I'd love to hear about it.

Currently based in West London. Reply within a day, usually.