Zen Scale
AI engineering studio · London

AI-powered software, built and run by the engineer you talk to.

I build AI features, web and mobile apps, and the infrastructure behind them for startups and SMEs, then stay on to keep them running. Most recently I built an automated AI pipeline that drafts radiology reports, now live in NHS hospitals.

Raj Gurung, founder. 15 years building production software.
01 · Proof

Systems I've built and run in production.

Before Zen Scale I was a technical lead at Hexarad and Indeed. Here's what I built there.

AI orchestration

An AI pipeline that drafts radiology reports, live in five months.

CT scans come in, a vision-language model drafts the report, safety checks decide whether it can be used, and a radiologist reviews it. I designed and led the whole automated pipeline and the AWS infrastructure under it. It now runs in live NHS clinical workflows.

Hexarad · Technical lead
Built to scale

From over a minute to under a second.

Reworked the slowest core APIs on a hiring platform serving 12M+ requests a week, and led the integration of an ML decisioning model. Also led the enterprise rollout behind multi-million-pound contracts.

Indeed · Technical lead
Reliable by design

A fast-growing platform kept stable, all the way to acquisition.

Joined Syft as an early engineer and led its workforce, employer and agency products. Owned production stability as usage grew, and through its acquisition by Indeed.

Syft → Indeed · Senior engineer
Raj is the rare engineer who is as aware of the human element of software development as he is the technical. … I wouldn't hesitate to work with him again.
Jonathan BarrettEngineering Manager at Indeed, managed Raj
An exceptional engineering partner: proactive, responsive, and always willing to jump in to help solve problems. He brings clarity to complex situations.
Palak JainSenior Product Manager, worked with Raj

Want this for your product? Book a free call →

02 · Services

What I can do for you.

From the first idea to running in production.

AI in your product

Add Claude or OpenAI to your product: smart suggestions, document extraction, search over your own content, and agents that take real actions through MCP. Tested so the answers stay reliable.

Claude · OpenAI · MCP · evals

Web and mobile apps

Full products from database to App Store. Customer portals, internal tools, SaaS, and iPhone and Android apps from one codebase.

Rails · Next.js · React Native

Infrastructure that stays up

I set up and run it all: cloud, databases, deploys, monitoring, backups and security. Clear uptime targets and alerts, so problems get fixed before your users notice.

AWS · Terraform · Cloudflare

A senior engineer in your team

Architecture, hard bugs, performance, and getting stuck projects moving. I can also help your team adopt Claude Code and AI coding agents safely.

Rails · TypeScript · Go · Claude Code
03 · Work

Products I've built and run.

Each one is calm to use: a few clear screens, plain labels, and one obvious next step. You can try them today.

● Live on web · iOS coming soon

Softly. Life admin, handled softly.

A task manager for bills, appointments and renewals. Type or say a task in your own words and AI turns it into a reminder, then suggests what's due next.

ClaudeVoice inputReact Native
Visit mysoftly.app ↗
Softly home screen showing suggestions and upcoming tasks
Collab task board with swimlanes for three projects

Collab

One workspace for small teams: roadmap, tasks, notes and chat. Connect Claude and it plans and updates tasks for you.

RustHTMXMCP
Try Collab ↗
Compress home screen: make PDFs and JPGs smaller, nothing is uploaded

Compress

Make PDFs and JPGs smaller right in your browser. Files never leave your device, and it works offline.

WebAssemblyOfflineOpen source
Try Compress ↗
The Warden, an armoured soldier holding a rifle

Warden Zero

An arena shooter that runs in your browser. Survive eight waves and bring down the Colossus.

Unity 6WebGLTouch
Play it ↗
04 · How it works

How a project runs.

  1. Talk

    Book a free 30-minute call, or email me.

  2. Scope

    A written plan with milestones and a fixed price. Projects start from £5k.

  3. Build

    Working software every week that you can click through.

  4. Run and support

    I deploy it, monitor it and keep improving it as you grow, from £500 a month. Same engineer, no handover.

Want this for your product? Book a free call →

05 · About

Hi, I'm Raj.

I started Zen Scale to build software the way I like to work: carefully, in plain English, with no layers between you and the engineer.

Most of my work today is AI: LLM features in production, MCP connectors, and engineering with Claude every day, with the reviews and tests that keep it trustworthy.

Tell me what you're building.

  • What your product does
  • What you need: AI, an app, infrastructure or ongoing support
  • Your timeline and rough budget
Or book a free 30-minute call →

I reply within one working day. Projects from £5k · ongoing support from £500 a month.