Real-Time UIs Without the JavaScript Tax

Phoenix LiveView lets you ship interactive, live-updating features in a fraction of the time it takes to build a React + WebSocket stack—and a fraction of the cost to maintain one.

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The Technical Case

The SPA alternative you didn't know you needed

Building real-time features with React means managing two codebases, two deployment pipelines, and a WebSocket API layer in between. Phoenix LiveView collapses that entire stack into one. State lives on the server. The DOM updates automatically over a persistent WebSocket connection. Your team writes one language, maintains one codebase, ships faster.

One codebase, full interactivity

LiveView renders HTML on the server and pushes minimal diffs over WebSockets. No separate React app. No REST or GraphQL API to maintain between your frontend and backend. One deploy, one team, one mental model.

Real-time that actually scales

Each LiveView connection is a lightweight Elixir process—Elixir can handle millions of them on commodity hardware. PubSub and Presence come built-in, so features like live cursors, notifications, and activity feeds are straightforward, not heroic engineering efforts.

Battle-tested in production

Discord, Pinterest, and Bleacher Report run on Elixir at massive scale. Phoenix isn't a framework experiment—it's a production-proven platform that has spent years handling the loads that other stacks scale horizontally to survive.

Capabilities

What we build with Phoenix LiveView

Any feature you'd reach for a full SPA to build, LiveView handles—with less code, less infrastructure, and a more maintainable result.

SaaS applications with live dashboards.
Multi-tenant platforms where metrics, activity feeds, and user states update in real time—no polling, no page refreshes, no stale data.
Collaborative tools and shared workspaces.
Presence tracking via LiveView's built-in Presence module shows who's online, what they're editing, and where they are—with zero extra infrastructure.
Live search, filtering, and data tables.
Instant search results, server-side filtering, and paginated data streams using LiveView Streams—fast even with large datasets, handled entirely server-side.
Notification and messaging systems.
PubSub broadcasts deliver real-time notifications across sessions and users. Chat, alerts, status changes—all pushed the moment they happen, not polled for.
Complex multi-step forms and wizards.
LiveComponents let us break complex interfaces into isolated, stateful pieces. Each component manages its own lifecycle—clean, testable, and reusable.
Operations and admin dashboards.
Internal tools where data freshness matters: job queues, order management, monitoring panels—built faster than any React + WebSocket equivalent.

Common Question

"But our team doesn't know Elixir."

Neither does most of the tech industry—and that's fine. You're hiring us to build your application, not to staff an Elixir team. When we hand off the project, you get clean, well-documented code and an onboarding session for your developers. Elixir has excellent learning resources and a welcoming community. Most engineers are productive within weeks. The alternative—maintaining a React SPA and a separate backend API forever—has far higher long-term costs.

Why Cobalt Sentry

Experience meets modern delivery

20+ Years Shipping Software
Elixir, Phoenix, Swift, and Astro in production. Not a generalist shop that Googles your stack after the contract is signed.
Fixed-Price, No Surprises
You know the cost before we write a line of code. No hourly billing, no scope creep invoices, no "we need another sprint."
You Own Everything
Full source code, deployment credentials, and documentation on handoff. No lock-in, no retainer required to keep the lights on.

Process

How we build your application

A structured process from first call to production deployment—no guesswork, no surprises.

  1. 1

    Discovery & Architecture

    We map your feature requirements, user flows, and real-time interaction patterns. You get a fixed-price proposal and a clear technical architecture before any code is written.

  2. 2

    Core Application Build

    Authentication, database schema, core LiveViews, and PubSub wiring. We establish the data model and real-time plumbing first, then layer features on top. Weekly demos on a live staging environment.

  3. 3

    Features & Polish

    Full feature build-out using LiveComponents, Streams, and Presence where appropriate. Test coverage, edge case handling, and performance review before we declare a feature done.

  4. 4

    Deploy & Handoff

    Production deployment with SSL, monitoring, and database backups configured. Your team gets a walkthrough of the codebase, deployment process, and everything needed to operate the application independently.

Fixed-Price Phoenix Development

Fixed-price projects, no hourly rates. Get a detailed quote tailored to your specific requirements.

Ready to get started?

Get in touch to discuss your project and receive a detailed proposal within 24 hours.

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