Fast under heavy load
Node.js serves many requests at once, which makes it a good fit for APIs, integrations and real-time applications such as chat, notifications and dashboards.
Node.js: fast backends and APIs
We build fast backends, APIs and real-time applications with Node.js that connect your online store, ERP and CRM and hold up under heavy load. Opus Online is a Tallinn-based software development company with more than 15 years of experience with business-critical systems.
We don’t start from the technology but from your goal. First we find out whether Node.js is the right choice for your project.
Why choose Node.js?
Node.js is a JavaScript runtime for server-side applications and one of the most widely used technologies for building APIs and backends. For a business, that means three things.
One language front and back
If your frontend is built with React or Next.js, the backend uses the same language too. Development is faster and the team can work across the whole solution.
Grows with your business
A small API can grow into a large system. For bigger projects we add structure with the NestJS framework and host the solution scalably on AWS.
- 15+years of software development experience
- 25+employees
- 120+completed projects
- ISO 27001certified information security
What we build with Node.js
APIs and backends
REST and GraphQL APIs for the web, mobile apps and partners.
Integrations
Connecting ERP, CRM, PIM and e-commerce systems so data moves by itself.
Self-service portals
Backends for customer and partner portals with roles, invoices and orders.
SaaS products
Applications with sign-in, payments and multi-tenant support that grow with the business.
Real-time applications
Chat, notifications and dashboards where data updates instantly.
Taking over an existing project
Audit, version upgrade and maintenance for a solution built by another team.
Node.js projects
We have extensive experience in developing IT software and e-commerce solutions for businesses, spanning from the financial sector to insurance and pharmaceutical industries. We serve as a long-term partner for both large corporations and rapidly growing startups.
Bonnier Rights Finland: a CRM for selling translation rights with every contract and deadline under controlTranslation rights and contract management with expiry automation, an internal tool for agents.Read more
Äripäev: a rebuilt news site and custom CMS that is faster and costs several times less to runThe aripaev.ee frontend rebuilt from scratch, a custom CMS for the newsroom and cloud costs cut several times over.Read more
Magnum VET: from phone orders to self-service in five B2B marketsFrom phone orders to self-service: a new B2B ordering platform for veterinary and dental products, five sites in four countries.Read more
Apotheka: one platform for five pharmacy and beauty stores in three countriesOne Magento 2 and React platform for five pharmacy and beauty stores in three countries, including secure sales of prescription medicines.Read more
Ahlbäck Agency: a CRM for publishing rights that also powers the public websiteA CRM for books and publishing rights that also feeds the agency’s public website through an API.Read more
Leading Quality AssuranceWe helped move a 20-year-old system to modern technology that needs less maintenance, is more secure and more configurable, and doesn’t require developer involvement for setup.Read more
NeurisiumA system that lets manufacturers and other industries use AI and machine learning to improve their processes.Read more
Estonian Film Database (EFIS): a new website that makes a national film archive fast to searchA new website for the Estonian Film Database: integration with the EFIS information system, fast search and a block-based CMS.Read more
Is Node.js the right choice for your project?
Node.js doesn’t suit every project, and we say so honestly at the first meeting. If you have an existing PHP system or a classic web application, PHP may be the better choice.
| Feature | Node.js | NestJS (Node.js framework) | PHP (Laravel) |
|---|---|---|---|
| Best suited for | APIs, integrations, real-time apps | large APIs and complex systems | classic web applications and portals |
| Getting started | fast | more structure up front | fast |
| Structure in a large codebase | by team conventions | built into the framework | built into the framework |
| Real-time communication | very good | very good | possible with extra tools |
| Same language as the frontend | yes (JavaScript, TypeScript) | yes (TypeScript) | no |
| Further development over the years | easy | easy | easy |
Taking over and upgrading an existing Node.js project
We take over Node.js projects built by another agency or an in-house team. We start with a code and security audit, which shows you what is in order, what needs fixing and what is critical.
After the takeover we keep looking after the solution: monitoring, security updates and hosting are part of the maintenance service.
How we work
You talk directly to the people who build your solution, not to intermediaries.
Kick-off meeting
We listen to your goals and tell you honestly whether Node.js fits.
Analysis and estimate
Functionality, integrations, risks, timeline and budget.
Development in cycles
A working version every couple of weeks.
Testing and launch
Speed, load capacity and security (OWASP).
Maintenance
We stay with the solution after launch too.
Technologies:
- Node.js
- TypeScript
- NestJS
- Express
- GraphQL
- PostgreSQL
- Redis
- AWS
Frequently asked questions
How much does a Node.js backend cost?
The price depends on the functionality, the number of integrations and the load. We give an exact estimate after a short analysis.
How long does a Node.js project take?
It depends on the scope of the solution. We set the timeline during the analysis, and you see a working version within a couple of weeks.
Which to choose, Node.js or NestJS?
NestJS is a Node.js framework that gives a large codebase a clear structure. For a smaller API or service, Node.js with Express is often enough; for a large, long-lived system we recommend NestJS.
Is Node.js suitable for connecting existing systems?
Yes. Node.js is a good choice for integrations that connect ERP, CRM, PIM and e-commerce systems, so data doesn’t have to be moved by hand.
Can you take over a project built by another agency?
Yes. We start with a code and security audit and propose where to begin.
Where is a Node.js solution hosted?
On AWS or Zone, depending on the load and your requirements.
Get in touch
Planning a new backend, API or integration, or want to hand over an existing Node.js solution? Write to us, and let’s discuss which solution fits you.
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