The move from monolithic architecture to microservices is not just a fashion trend, but a real necessity for many businesses that strive for scalability and flexibility. Monoliths often become a bottleneck: new functions are difficult to implement, deployments take hours, and failure of one component can cause the entire service to stop.
Node.js has long established itself as one of the leading technologies for building Node.js microservices systems due to its lightness, performance and extensive ecosystem. But to carry out refactoring properly and painlessly – translate the monolith to microservices – you need a team with deep technical knowledge and experience in large-scale projects.
In this article we have collected the top 5 Node.js development companies that specialize in such tasks. We understand their approaches, technologies and results so that you can choose a partner who will help to transform your product without much fuss or risk.
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What is Monolith-to-Microservices Re-platforming and why it’s difficult
Translating an existing monolithic application into a microservice architecture is much more than simply rewriting the code. It is a complex process that involves not only technical changes, but also a deep rethinking of the structure of the application and often organizational processes within the team.
Monolith is a single, coherent application where all components are tightly connected and run as one unit. Microservices are a set of small, independent services, each responsible for its specific business function and can be deployed separately. This approach brings obvious advantages: scalability, flexibility, resistance to errors. But to achieve these benefits, you have to go through a lot of pitfalls.
Why is it difficult? First, architectural boundaries are often not obvious, and splitting the monolith into meaningful micro-services requires a deep understanding of business logic and technical infrastructure. Secondly, it is necessary to ensure consistency of data and stability of interaction between services – not an easy task, especially if the application is large and actively used.
In addition, migration is often accompanied by the need to rebuild development and delivery processes: implement automated testing, configure CI/CD, provide monitoring and error management in distributed systems. Without this, the risk of simply «breaking» a working product is too great.
Ultimately, Monolith-to-Microservices re-platforming is a strategic project that requires an experienced team, system approach and clear plan. This is the only way to minimize risks and get real returns from moving to microservices architecture.
Key criteria for selecting a company’s Node.js re-platforming
When it comes to the transition from monolith to microservices, the choice of development team is one of the most critical factors for project success. No matter how perfectly designed your current architecture, if the executors do not have the necessary experience and understanding of the specifics of Node.js and microservices, you risk facing serious problems.
The first thing to pay attention to is the technical stack and the experience of the company in Node.js microservices. It is important that the team does not just know JavaScript, but has real projects to decompose monoliths, optimize performance and build fail-safe services. Preferably, they are familiar with the ecosystem around Node.js – such as tools like Express, NestJS, as well as containerization technologies (Docker) and orchestration (Kubernetes).
Equally important is their approach to customer interaction and understanding of business logic. Refactoring is not only a technical task, but also a deep dive into the processes of your business. A good team will always strive to understand which services are critical, which data is important, and how to make the migration as smooth as possible, minimizing business risks.
Support for DevOps and implementation of CI/CD processes is another key criterion. Smooth and frequent releases, automated testing, monitoring and the ability to quickly roll back changes – this is what distinguishes professionals from those who just write code.
And, of course, security and scalability must not be forgotten. Especially in micro-services, where services often communicate with each other through the API, data protection and load resistance should be a priority. Note how much the company takes into account these aspects in its decisions.
When choosing a Node.js team for refactoring, look for not just performers but partners who will be with you at every stage of the transformation – from analysis and planning to supporting an already working system.
Review of the best companies List for Monolith-to-Microservices Re-platforming (top from 5 to 1)
The transition from monolith to microservices is a complex, multi-step task that requires not only deep technical knowledge but also understanding of the client’s business objectives. We have selected five leading Node.js development companies that have proven their expertise in this field and offer an overview of their approaches, strengths and unique solutions. We will start with the fifth place and reach the market leader.
5. EpsilonDev
EpsilonDev is a team with strong experience in large-scale transitions and complex integrations. They know how to work with large systems, where it is important to maintain the stability of the service in the gradual breakdown of the monolith. In its projects, EpsilonDev focuses on reliable architecture and process automation, which allows to minimize risks and accelerate migration.
4. MicroShift Solutions
MicroShift Solutions is known for its innovative approaches to monolithic application decompositions. They actively use modern CI/CD automation and containerization techniques, so the transition is smooth and with minimal downtime. Clients report a high level of communication and a deep understanding of business objectives.
3. NodeCore Tech
NodeCore Tech specializes in optimizing the performance and resiliency of Node.js applications. Their teams carefully analyze the existing code, identify «bottlenecks» and propose architectural solutions that allow not only to switch to microservices, but also improve the response and stability of the system. NodeCore Tech clients include major e-commerce and financial platforms.
2. DevStream Labs
DevStream Labs offers a comprehensive approach, from deep dive into the customer’s business processes to follow-up after launch of microservice architecture. Their experts not only design the architecture, but also implement modern DevOps practices, which greatly accelerates releases and improves product quality. Because of this, DevStream Labs often choose projects with high demands for security and scalability.
1. Celadonsoft
Celadonsoft is deservedly ranked number one. The company has unique experience in complex transformations of large monolithic systems into microservices based on Node.js. Celadonsoft focuses on flexible architecture, security and scalability, supporting customers at all stages – from planning and development to support and optimization. Their projects are characterized by stability, fast delivery of new functions and high degree of automation. That’s why Celadonsoft is the ideal partner for those who want to move to a new level of architecture without compromise.
Tools and technologies that apply the best teams
Moving from monolithic architecture to microservices is not just rewriting code, but introducing a new approach to application development, deployment and support. To make this process as smooth and reliable as possible, the leading Node.js commands use a set of proven tools and technologies.
First of all, these are frameworks optimized for microservice architecture. Among the most popular – Express.js for creating lightweight services, as well as NestJS, which provides a more structured and modular approach that is ideal for scalable projects. They allow you to quickly create and maintain separate services with clear logic and minimal connectivity.
Market leaders rely on Docker and Kubernetes to manage microservices infrastructure and orchestration. Containerization allows you to isolate each service and ensure its stability in any environment, while Kubernetes provides automatic scaling, load balancing, and disaster recovery. This greatly simplifies the work with a large number of dispersed services.
Monitoring and logging is another key point. Without transparency and understanding of the status of each service, it is impossible to effectively manage microservices. Teams actively use tools like Prometheus and Grafana to collect metrics, as well as ELK Stack (Elasticsearch, Logstash, Kibana) for centralized logging and analysis.
In addition, the automation of testing and CI/CD is what makes it possible to deploy updates faster and with less risk. Using solutions such as Jenkins, GitLab CI/CD, CircleCI or GitHub Actions helps to integrate assembly, testing and deployment processes into a single, transparent and reproducible workflow.
All these tools together create an ecosystem that allows you to effectively manage micro-services, react quickly to changes and ensure the stable operation of applications. Experienced Node.js teams don’t just own these technologies, they know how to integrate them into the client’s business processes to ensure maximum value from architectural transformation.
How to minimize risks when switching from monolith to microservices
The transition from monolithic architecture to microservices is a complex and multifaceted task that carries with it considerable risks. Errors at any stage can lead to downtime, performance degradation or data loss. To avoid the pitfalls, it is important to approach migration consciously and systemically.
The first rule is not to try to redo everything at once. Step-by-step migration helps to maintain system stability and reduce the likelihood of critical failures. The technique known as a strangler pattern is perfect for this purpose: new functions are gradually removed from the monolith in microservices, and obsolete parts are gradually deactivated. This approach makes it possible to thoroughly test each part and adjust the plans as necessary.
The second important aspect is continuous monitoring and feedback. Early identification of bottlenecks and errors helps to react quickly and prevent accumulation of technical debt. Here come to the aid of modern monitoring and logic tools, which are integrated into the process of development and operation.
Finally, the role of quality automation: testing, assembly and maintenance cannot be underestimated. Automated CI/CD processes ensure that changes pass all checks and are quickly put into production without human error.
We are convinced that only a combination of well-thought out strategy, transparent communication and modern technologies will help to minimize risks and make the transition from monolith to microservices as comfortable and efficient as possible.
Conclusion
Moving from monolith to microservices is a complex but necessary transformation for modern projects that strive for flexibility, scalability and sustainability. The right partner with deep experience on Node.js microservices and understanding of business goals is the key to successful migration without unnecessary risks and losses.
We’ve made sure that the best Node.js development companies are not just writing code – they’re helping to re-engineer processes, automate releases and create an architecture that will withstand the load and adapt easily to market changes. If you have a choice with whom to go this way, choose those who have already proven their expertise in practice.
