How Nexlab used Hasura to digitize Daikin Vietnam’s AC servicing unit

Daikin Vietnam worked with Nexlab on a project to modernize their legacy technology stack. Nexlab chose Hasura for this initiative, and the end result was a project delivered ahead of schedule and at a 50% lower cost than planned.

Nexlab is a software development agency based in Vietnam that specializes in building custom software solutions as well as providing software outsourcing services for enterprise customers. Their customers are based in Singapore, Hong Kong, Vietnam, and the USA. Nexlab was founded in 2016 and now has 40 employees based in Vietnam.

Nexlab moved to use Hasura primarily to be able to deliver projects within a tight timeline and deliver complex enterprise applications confidently. In 1 year, Nexlab has made Hasura an essential part of their stack and has observed a 50% reduction in their development cost and the ability to confidently deliver within timelines.

“Hasura saves us a lot of time, by reducing our cost, our team size as well as the talent that we need to hire. Overall, Hasura has reduced our development cost by 50% and has made the team confident that we can provide better time estimates to clients as well as deliver on time”.

Other advantages highlighted in this case study include:

  1. Reduce the dependency on the backend developer for API design and development.
  2. Empower frontend developers to be full-stack developers with better domain understanding and visibility into the application architecture.
  3. Using best of breed tooling to build cloud-native scalable applications
  4. Incremental migration to ensure that new systems can stay in sync with legacy applications within the enterprise

Challenges faced by NexLab:

Nexlab is a technology partner to Daikin Vietnam, one of the largest Air Conditioning companies globally, and was approached by them to help digitize their entire system.

In this case study, we will be focussing on the service management system built by Nexlab for Daikin Vietnam. This system helps users easily register an air conditioning service request on an app and be assigned a technician by Daikin to fulfill the request. This service was originally being managed manually: downloading a lot of data from their legacy systems — ERP software, CRM systems as well as access control software, into several excel sheets and assigning technicians manually.

This legacy system was not fast enough for the real-time requirements of the business unit and needed a lot of human intervention for completing each request. Furthermore, there was also no way to monitor and measure the business impact of this service and the teams.

Nexlab was approached in September of 2019 to digitize the entire servicing business unit of Daikin Vietnam. Nexlab was to build all the applications required to take this business unit online, as well as integrate with their legacy systems so that reporting could continue to be centralized.

Given the business importance of launching this before the busy summer months of April to June, there was significant pressure to deliver the product on time.

This project required 3 applications to be built:

  1. Mobile applications for the user to book a service and see the allocation and fulfillment by the technician
  2. Mobile applications for the technicians to receive and confirm the request
  3. Web dashboard for the operations team to manage and monitor these requests — for example, to understand if service requests are being fulfilled on time.

These systems also had to interact with their existing systems: their CRM, ERP, and their existing call center software.

Choosing Hasura

Nexlab was traditionally a NodeJS and Postgres shop working mostly with REST APIs. The time constraints of the Daikin project got them exploring other solutions that could help reduce their development time. Hasura was recommended by a consultant they worked with as a solution that could not only reduce their development time but was also very performant, and plug and play to set up.

The team building these 3 applications consisted of 1 backend developer, 1 web developer for the admin dashboard, and 4 mobile developers, across Android and iOS, for the 2 mobile applications. With their older NodeJS stack, there was a lot of pressure on the backend team to build the multiple APIs required by the front-end team for the admin portal. With Hasura, the frontend teams are able to do this by themselves by using GraphQL to query the backend directly. The single backend developer on the project was responsible for the database design which automatically set up the GraphQL endpoint (Hasura automatically creates the GraphQL server, without the backend developer needing to build it), as well as building a simple NodeJS service that converted Hasura’s GraphQL APIs to REST for consumption by the mobile app teams.

“Using Hasura has helped the front-end developers on our team become full-stack developers by understanding more about database design and using GraphQL to query the database directly. This has been very easy to learn, and the frontend developers no longer have to wait on the backend team to design and build APIs for them to consume”

Using Hasura accelerated the development time significantly while reducing the number of people required to build these applications. The frontend team now also gets involved in the domain design to understand how to write more efficient queries making the overall team highly efficient.

Originally published at on July 6, 2021.

⚡️ Instant realtime GraphQL APIs! Connect Hasura to your database & data sources (GraphQL, REST & 3rd party API) and get a unified data access layer instantly.

⚡️ Instant realtime GraphQL APIs! Connect Hasura to your database & data sources (GraphQL, REST & 3rd party API) and get a unified data access layer instantly.