Node.js Development Experts
Enterprise Node.js consulting, modernization, and long-term support for organizations running mission-critical services on the Node.js runtime.
PALADEM’s Node.js development experts help engineering teams build, modernize, and sustain production services on the Node.js runtime. Whether you need to pull an application off an end-of-life Node release, choose between Express, Fastify, NestJS, or Hono for a new service, tune a serverless workload, or take on long-term maintenance of a mature codebase, our Node.js experts deliver work that holds up under real operational scrutiny.
Why Choose Node.js?
Node.js remains the pragmatic default for HTTP services, real-time workloads, and API-first backends because it pairs a unified JavaScript stack front to back with the largest package ecosystem in software. In 2026, Node 22 is the active LTS and Node 24 is current, and the runtime now ships with a native test runner, native fetch, stable ESM, a watch mode, and a permission model, all in-core. That maturity closes much of the gap that alternative runtimes opened a few years ago. Node.js is particularly well-suited to teams that want fast iteration on I/O-heavy services, strong serverless fit, and access to a deep talent pool, provided they accept the LTS treadmill and treat dependency hygiene as a first-class engineering concern.
Our Node.js Services
Custom Node.js Application Development
We design and build custom Node.js services end to end, from initial architecture through production deployment. New builds target current Node.js releases on ESM and TypeScript, with a framework chosen to fit the service rather than a house default. Every service we ship is architected for the ten-year view, with logging, error handling, supply-chain hygiene, and operational runbooks treated as part of the deliverable rather than an afterthought.
Node.js Consulting & Architecture
Our Node.js consulting experts advise engineering leaders on the decisions that are hardest to reverse: runtime and LTS strategy, framework selection across Express, Fastify, NestJS, and Hono, module system direction, monorepo versus polyrepo layout, build and bundling topology, and the boundary between Node services and the rest of the stack. We review existing codebases, identify architectural risk, and deliver written recommendations your team can execute.
Performance Optimization
Slow and expensive Node.js services are usually diagnosable. We profile event-loop lag, memory growth, CPU hotspots, and dependency load cost, then deliver targeted fixes: event-loop discipline, worker_threads for CPU-bound work, streaming over buffering on large payloads, connection pool tuning, and bundle and cold-start work on serverless. The deliverable is a prioritized plan with measured before and after numbers.
Legacy Node.js Modernization
We offer incremental modernization for Node.js codebases stuck on end-of-life runtimes or halfway through modernization they never finished. Typical engagements include Node 14, 16, or 18 to Node 22 or 24 upgrades with staged dependency audits, CommonJS to ESM migrations file by file, adding TypeScript to JavaScript-only codebases, and selectively moving Express services to Fastify or NestJS where the architectural win justifies the change. The application remains shippable throughout.
Node.js Support & Maintenance
We provide ongoing support for production Node.js services, including runtime and dependency upgrades, npm audit and supply-chain remediation, memory-leak investigation on long-running processes, observability and alerting improvements, and feature work. Our maintenance engagements are sized to the real surface area of your codebase and keep the service aligned with the Node.js release cadence rather than letting it drift into another EOL crisis.
Why PALADEM?
- Built for production Node.js. Our Node.js work targets long-lived services where runtime currency, dependency hygiene, and operational behavior matter more than the latest benchmark headline.
- US-Based Architecture, Global Delivery. Senior US architects lead every engagement, supported by a global engineering team for efficient, cost-effective delivery. See our full services for how we structure engagements.
- Software Stewardship Approach. Every Node.js engagement is guided by our Software Stewardship Framework™, which treats your service as a long-lived asset to be cared for across all eight stewardship pillars rather than a one-time deliverable.
Related PALADEM Services
Expertise translates into practice through PALADEM’s service lines. These are the most commonly engaged services alongside or instead of expertise-specific work.
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Autonomous workflows that reason and act, with the guardrails, checkpoints, and human oversight to keep them safe.
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Interface and experience design grounded in the people who will actually use the system.
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Continuous, evidence-based quality validation across automated regression, manual testing, and performance testing.
Learn moreFrequently Asked Questions
Our application is still on Node 14, 16, or 18. How risky is upgrading to Node 22 or 24?
Node 14 and 16 are years past end of life, and Node 18 reached end of life in 2025. Running on any of them means shipping unpatched runtime vulnerabilities and losing access to a growing share of the npm ecosystem. The upgrade itself is usually manageable when approached in stages: audit dependencies for Node 22 and 24 compatibility first, resolve deprecations, then cut the runtime over in a staging environment with full test coverage before production. The bigger risk is almost always stale dependencies rather than the Node engine itself, and that risk grows the longer you wait.
What is the right path from CommonJS to ESM for an existing codebase?
For most production codebases, the right path is incremental rather than all at once. We typically stabilize the build and test pipeline first, move leaf modules to ESM where the bundler allows dual-format output, and work inward from there. Packages that cannot yet move cleanly are kept on CommonJS behind a clear boundary. The goal is to keep the application shippable throughout and end with a codebase that is fully ESM, tree-shakeable, and aligned with where the ecosystem has already moved.
Express, Fastify, NestJS, or Hono for a new Node.js service?
The honest answer depends on the shape of the service. Express is still a reasonable default for small to mid-sized APIs where team familiarity matters and the performance ceiling is not a concern. Fastify wins when raw throughput, schema-driven validation, and a modern plugin model matter. NestJS suits larger applications where a strong architectural convention, dependency injection, and TypeScript-first patterns are worth the framework overhead. Hono is a strong choice for edge and serverless workloads where small bundle size and fast cold starts dominate. We make the choice an explicit decision rather than a default.
Should we move off Node.js to Deno or Bun?
For most production workloads the honest answer today is no. Node.js has the deepest package ecosystem, the most mature operational tooling, and the broadest hosting support, and recent releases have closed much of the gap Deno and Bun originally opened around ESM, native test runner, fetch, and watch mode. Bun is genuinely compelling for local development speed and some build toolchains, and Deno has real strengths around default security and TypeScript ergonomics. We recommend them as tools in the stack where they fit rather than as a wholesale replacement for a working Node.js runtime.
How do you tune Node.js for serverless cold start and cost?
Cold start work on serverless Node.js is mostly about shrinking the surface area the runtime has to load. We typically bundle and tree-shake the handler with a modern bundler, strip development-only dependencies, right-size memory to match observed CPU usage, review provisioned concurrency against real traffic patterns, and push heavy initialization outside the handler entry point. Where the workload allows, we evaluate edge runtimes and smaller frameworks such as Hono. The deliverable is a prioritized plan with measured before and after numbers on cold start time and monthly cost.