Prometheas Technologies
Product Engineering practiceProduct engineering · Web

Web apps that age well.

Most web apps die of accumulated small compromises: a component system nobody owns, rendering choices made on instinct, a test suite that's been skipped around for a year. We build web apps that don't.

What it is

Web applications & design systems

Full-stack web application delivery — from marketing surfaces and content-heavy products to complex internal tools and customer portals. TypeScript-first, with design systems, rendering strategy, and performance budgets all treated as first-class concerns rather than sprint-four stretch goals.

When we recommend it

Fit signals.

  • You need a greenfield web product shipped fast without inheriting tech debt by month three
  • A legacy Rails / PHP / .NET app is slowing the business and the team can't modernize around feature work
  • Your design team has a system in Figma but no shared implementation
  • SEO, LCP, and accessibility are actual business requirements, not just checklists
  • The product spans marketing + app + authenticated surfaces and needs to feel like one thing
When it isn't the right call

Honest tradeoffs.

  • The work is fundamentally a ServiceNow or Salesforce extension — pick the right platform first
  • You need 6–10 hours/week of senior help; that's an embedded-engineers engagement, not a product team
Capabilities

What we deliver in Web.

Every capability below is practiced across multiple production engagements — not a scoping checklist.

Frameworks & rendering

  • Next.js (App Router) + React as the default
  • Remix / React Router for edge-heavy or highly interactive products
  • Astro for content-heavy sites where JS should be zero by default
  • SSR / SSG / ISR tradeoffs picked per surface, not per project

Design systems

  • Tokens-first systems (shadcn, Radix, custom)
  • Storybook + visual-regression testing
  • Typed props, composition patterns, a11y-first primitives
  • Handoff from Figma without a translation layer

Performance & accessibility

  • Lighthouse + WebPageTest as CI-gated budgets
  • Image, font, and script strategies that survive a design refresh
  • WCAG 2.2 AA as the floor, not the ceiling
  • Edge caching, streaming, and hydration tuning

Backend-for-frontend

  • Route Handlers / Server Actions + typed client patterns
  • tRPC, GraphQL, or REST — picked by team reality, not fashion
  • Auth (NextAuth, Clerk, WorkOS, custom) without coupling it to everything
  • Data fetching patterns that don't waterfall
Engagement patterns

The shapes this work
usually takes.

Greenfield product build

Typical: 12–20 weeks. Pod of 4–6. Marketing + app + design system in one coherent codebase.

Legacy replacement

Typical: 16–24 weeks. Strangler-pattern migration with a clear retirement plan, not a big-bang rewrite.

Design system rebuild

Typical: 8–12 weeks. Tokens, primitives, documentation, and the first 3–5 screens that prove the system.

Managed web service

Monthly. Ongoing feature delivery, performance hygiene, release train.

What goes wrong

Pitfalls we've seen
and how we avoid them.

Rendering strategy by vibes

Every page SSR'd or every page static with no reason. We pick per surface based on traffic, content shape, and SEO weight.

Design system as a phase

'We'll extract the system in Q3.' You won't. We build the tokens and primitives in week one or don't bother.

Framework-adjacent bloat

Every new framework feature adopted on day one. We stay one step behind the bleeding edge; it hurts less.

Skipping a11y until launch

Retrofitting accessibility after launch costs 3× what building it in costs. It's in the definition of done.

FAQ

Common questions about Web.

Default is Next.js App Router. We reach for Remix when the product is heavily form-driven, needs unusual caching control, or the team's mental model maps better to loaders/actions. Either is defensible; we'll recommend honestly per project.

Other Product Engineering modules

Web on your roadmap?

Thirty minutes with Kabir. Architecture sketch, candid second opinion, scope estimate — no slides.

Book the call