Treevoxa offers Node.js development services for companies building SaaS products, business systems and APIs. We write TypeScript on NestJS or Express, with PostgreSQL underneath, and we put the scope, the price and the ownership of the code in writing before we start.
Node.js is the back end of most of what we sell, so the code we write for clients follows the same rules we follow for ourselves: tested, documented, secured and easy for the next developer to read.
Node.js app development services we offer
- SaaS back ends: accounts, organisations, roles, subscriptions, billing and admin tools.
- REST APIs for web and mobile apps, partners and integrations. See API development services.
- Web application back ends for portals, dashboards and internal systems.
- Real-time and background work: queues, scheduled jobs, webhooks and notifications.
- Audits and rescues for Node.js code bases that have become slow, insecure or hard to change.
Node.js in our own products
- MatrixHR runs on NestJS: modules, guards and JWT authentication through Passport, request validation with class-validator, rate limiting, security headers, OpenAPI documentation, Prisma on PostgreSQL, PDF payslips, Excel imports and file storage on Amazon S3.
- Callboard, our AI phone agent product, runs on NestJS with Prisma and PostgreSQL-backed sessions.
- PharmaFlow runs on Express on PostgreSQL, with Joi and express-validator for input, Helmet, compression, rate limiting, PDF and spreadsheet exports.
- RE-ERP runs on Express with Zod validation, two-factor sign-in, Stripe billing, document parsing, and AI features on the OpenAI and Anthropic APIs.
Node js web development services: tech stack
| Part | What we use |
|---|---|
| Frameworks | NestJS, Express |
| Language | TypeScript, modern JavaScript |
| Data | PostgreSQL, Prisma, SQL migrations, Supabase |
| Validation | class-validator, Zod, Joi |
| Security | JWT, Passport, bcrypt, Helmet, rate limiting, two-factor sign-in |
| Services | Stripe, Amazon S3, email delivery, OpenAI and Anthropic APIs, PDF and Excel generation |
| Front end | React, Next.js, React Native |
The same language on both ends means one team can own a feature from database to screen; that is what JS development services should mean. See NestJS development, React development and mobile app development. For nodejs web application development services with server-rendered pages, see Next.js development.
How to compare Node js development companies
Ask each JS development company to show a Node.js back end it runs in production, its test suite, and how it handles security updates. Custom Node js development services are only as good as the maintenance after launch.
How a Node.js project runs
- Discovery. What the system must do, who uses it, and what already exists.
- Written scope. Modules, endpoints, integrations, milestones and the price.
- Build with tests. Automated tests and type checks on every change.
- Deploy. Containers, environment configuration, migrations, logging and monitoring.
- Support. Dependency and security updates and new features, agreed in writing.
Engagement models for Node.js work
- Fixed scope for a defined back end, API or feature set.
- Dedicated Node.js developer working only on your product, billed monthly. See hire developers.
- Hourly for audits, fixes and small changes.
What Node.js development costs
The cost of Node.js work depends on the number of modules and integrations, data migration, test coverage and the state of any existing code. The custom software development cost guide explains the drivers, and developer rates compares what teams charge by region. We quote in US dollars, in writing.
Who Node.js development is for
- SaaS products that need a fast, typed back end and one language across the stack.
- Companies with JavaScript teams that want their front-end developers able to work on the server.
- Real-time products such as dashboards, chat and notifications.
- Integration-heavy systems that talk to many APIs at once.
Questions to ask before you hire a Node.js team
- Can we see a Node.js back end you run in production?
- NestJS or Express for our project, and why?
- How do you validate input and check permissions on every route?
- How do you keep dependencies patched?
- What do your tests cover?
Ask every bidder the same questions, in writing, and compare the answers before you compare the prices.
Working across time zones on Node.js projects
We agree a daily overlap window in your working hours before the project starts, usually your morning for US teams and the afternoon for UK and European teams. Code reviews and decisions happen in that window; the building happens around it.