Software designer & engineerToronto time--:--:--

I build software people quietly rely on.

I’m Joel Saji. I design, build, and run my own products, and I write about what the work teaches me.

Approach

I take products from first sketch through interface, data model, and the systems that keep them running. Calm UI, dependable engineering, and the small details that make software feel considered.

More about me
Now

Church Grid & Waveform Apps

Studying

AI agents & TanStack Start

Latest writingiOS 27, iPadOS 27, macOS 27, watchOS 27 and tvOS 27Sep 14, 2026

Selected work

Products I’ve built and run.

View all work

Services

What I do, end to end.

01

Product & interface

Turn fuzzy goals into flows people understand on the first pass.

  • Product discovery and scope framing
  • Interaction design and design systems
  • Accessible, responsive UI implementation
  • Design-engineering handoff without drift
02

Full-stack delivery

Production software with architecture that stays boring to maintain.

  • React, TypeScript, and TanStack Start / Router
  • API design, data modeling, and server functions
  • Cloudflare Workers and edge-friendly deploys
  • Auth, caching, and performance budgets
03

AI-powered products

Useful AI with clear trust boundaries, not demoware on top.

  • LLM integrations, tools, and retrieval
  • Agent workflows with human-in-the-loop guardrails
  • Evaluation, prompting, and cost/latency tradeoffs
  • Prototypes that graduate to production patterns

Next step

Let’s talk.

hello@joelcsaji.com

Tell me what you’re building and what success looks like. You’ll get one reply within a day, usually with a few questions. Or use the contact form.