Custom Node.js development — real-time backends, high-throughput APIs, and scalable web applications. Shipped by senior engineers with ten years of Node.js in production.
Why Entalogics for Node.js
Most Node.js development companies treat Node like a thread-per-request server. We build around how the runtime actually works.
One synchronous CPU-heavy task stalls every pending request. We audit for event loop blockers from day one and offload CPU-bound work to Worker Threads before it becomes a production incident.
Thin route handlers, domain logic in pure functions, data access behind typed repositories. A new engineer finds the right file in thirty seconds — not thirty minutes of grepping.
An omitted `await` passes a Promise instead of a value. Sequential awaits that could run in parallel double your latency for free. We catch this before the integration test does — with TypeScript and ESLint rules on every codebase.
Zod at every external boundary. tRPC or typed OpenAPI at the API layer. A schema change surfaces every broken call site in seconds — not after a production deploy.
When Node.js, when not
An honest decision matrix. If your problem needs a different runtime, we say so — before you've committed budget.
PICK NODE.JS WHEN
CONSIDER OTHERS WHEN
WE SAY NO WHEN
What we build with Node.js
The shapes of Node.js work we ship most often — each slots cleanly into your existing infrastructure, or we build greenfield from scratch.
Live collaboration tools, event feeds, and AI token streaming. Node's event loop handles ten thousand concurrent WebSocket connections where a thread-per-request server needs ten machines. We use Socket.io, WebSockets, and Redis pub/sub to keep latency flat under load.
Custom RESTful APIs and GraphQL services built for scale. Fastify for Node-native performance, Hono for edge-deployed APIs. Built-in schema validation, typed contracts from route definition to client — no drift between what the API sends and what the client expects.
Full-stack JavaScript development from MVP to enterprise platform. Scalable web applications with clean backend architecture, optimized for high traffic without the 2am incident. Built in TypeScript with testable, maintainable code from day one.
Decouple your monolith into independently deployable services. Each microservice handles its own data, scales on its own, and fails without taking down the rest. Docker, Kubernetes, and API gateways wired in from the start.
Stuck on a legacy Express codebase, PHP backend, or Python server? We migrate route by route behind a reverse proxy — never a flag-day cutover. Your app keeps shipping throughout. Express, PHP, .NET, Python — we've migrated all of them to Node.js.
Post-launch is where most Node.js projects start to degrade — memory creep, event loop slowdowns, outdated packages. We offer ongoing support, performance audits, security patches, and dependency updates to keep your application running at peak.
The playbook
Not invention — convention, applied carefully. The patterns that show up on almost every Node.js engagement we take.
P01
Every handler stays async. CPU-bound work goes to a Worker Thread pool. Clinic.js runs in CI to catch event loop regressions before production does.
P02
tRPC for full-stack TypeScript. Zod schemas that become the types — one definition, no drift between API output and client expectations.
P03
Large payloads streamed, never buffered into memory first. `pipeline()` over manual `pipe()` for proper error propagation. Memory that stays flat under load.
P04
Typed error classes, not string messages. Global error handler that logs, traces, and returns consistent shapes. Unhandled rejections wired to alerting — not swallowed by a catch block.
P05
SIGTERM handler that drains in-flight requests, closes database pools, and flushes logs before exit. Zero dropped requests during rolling deploys.
P06
New Fastify or Hono routes behind a reverse proxy alongside the old Express app. One route at a time until the new code has earned every path.
Signature case
A B2B collaboration platform on Express.js: 450ms p99 on the WebSocket broadcast path, synchronous JSON processing blocking the event loop, memory climbing 40MB per hour until the daily restart. Rebuilt on Fastify with Worker Threads and Redis pub/sub in 9 weeks. Without a downtime window.
Before
p99 broadcast 450ms · event loop blocked 18% · memory +40MB/hr · daily restart required
After
p99 broadcast 22ms · event loop block 4% · memory stable · zero scheduled restarts
Industries we serve
We've shipped Node.js applications across SaaS, fintech, healthcare, eCommerce, logistics, and enterprise software. Wherever high-concurrency backend performance matters, Node.js is our first call.
Engagement shape
A typical Node.js engagement, end to end. We migrate route by route — never flag-day. The current app keeps shipping while we work.
Two senior Node.js engineers in your codebase. Event loop profiling with Clinic.js, async anti-pattern inventory, memory leak audit. You leave week one with a ranked, costed RFC.
TypeScript strict, Fastify or Hono wired in, Zod at every boundary, one production route migrated end-to-end. Real p99 numbers in your dashboards — not a local benchmark.
Route by route behind a reverse proxy. Old and new run side by side. Kill-switch on every cutover. Your roadmap keeps moving throughout.
Decommission the old. Integration tests with Testcontainers. Runbook handed to your team — or we stay on retainer for ongoing Node.js support and maintenance.
Stack
Picked by problem, not by resume. Happy to slot into your existing stack — but greenfield, this is what we default to.
Verified feedback from Upwork, Clutch, and reference calls we're happy to set up before you sign anything.
CEO, Modestly
Entalogics has successfully delivered extension prototypes on time, and we are impressed with their project management and the finished product. The client communicates with Entalogics via virtual meetings, email, and messaging apps.
Founder, Flourish Schools
Collaborating with Entalogics was a great experience. Communication was clear, we aligned quickly, and their team delivered high-quality code on time with thoughtful technical decisions.
CTO, SentryBay
Their Chromium expertise helped us ship a hardened browser with live threat controls and enterprise rollout support. Security operations became significantly faster.
Founder, G3 Ventures LLC
Entalogics delivered our custom Electron browser in six months with isolated profile workflows and stable policy sync. Agent onboarding improved by 55% after rollout.
Project Manager, Sociall
Entalogics built our iOS Chromium-based mobile app with a smooth native feel, stable media rendering, and reliable sync. We shipped faster and improved engagement after launch.
RozmeriGPT
The web dashboard and Chrome extension now share prompts, billing, and analytics in one platform. Our content turnaround improved 4x after launch.
Project Manager, Omni Browser
Entalogics built our Omni Browser on top of Chromium with deep product-level execution. They implemented an integrated VPN and Omni Crypto Wallet directly in the browser, made strong architectural decisions, and delivered quality code on schedule with clear communication.
Project Manager, Digital Office: Aura
Entalogics built Digital Office: Aura as a custom Chromium-based authentication platform. Their team modified Chromium internals and integrated our manual custom authentication flow with reliable implementation, fast delivery, and consistent communication.
Engagement
No hourly retainer that bills for thinking time. Pick a model that matches your stage — everything is fixed-quote or transparently rated.
A defined product, a fixed price, a senior-only team. From RFC to launch in 8–14 weeks.
$15k–$30k
FIXED SCOPE
Embedded engineers in your Slack, your Linear, your standups. Senior Node.js engineers augmenting your team. Pause, resize, or end with 30 days' notice.
$5k / eng / mo
PER ENGINEER
A long-term partner for product orgs that need both delivery and judgment — event loop program, migration roadmap, architecture reviews, hiring help.
custom
PROCUREMENT-FRIENDLY
Founder-direct
Thirty minutes with the founder. We bring a senior Node.js engineer, the relevant playbook, and a candid read on whether Node.js is the right runtime — or whether your workload needs something else.
