A leading Japanese supermarket chain had an excellent loyalty program — but customers weren’t joining. The reason turned out to be painfully simple: the only way to register was on paper.

This case study explores how SHIFT ASIA developed a multi-device digital membership registration portal, accessible on PC, smartphones, and in-store tablets, that replaced the paper-based process and drove a significant increase in new member sign-ups.

Client Overview

A major supermarket chain operating across Japan, with a large network of stores and a loyal customer base built over decades. The client runs an established membership rewards program that offers discounts, point accumulation, and exclusive benefits, designed to reward regular shoppers and encourage repeat visits.

For years, customers who wanted to join a leading Japanese supermarket’s membership program had only one option: complete a paper form in-store. While the program offered meaningful loyalty benefits, the registration barrier was quietly limiting how many shoppers actually joined.

Client Challenges

Despite offering an attractive loyalty program, the client was seeing lower-than-expected membership sign-up rates. An internal review identified the registration process itself as the primary barrier. Customers who intended to join frequently abandoned the process when faced with a physical paper form, particularly in a consumer environment where digital-first interactions had become the norm.

The client faced several interconnected challenges in addressing this:

Paper-only registration created significant friction

Membership registration required customers to be physically present, fill out a form by hand, and submit it to store staff. This process was time-consuming and deterred many shoppers from completing sign-up, particularly those who encountered the programme at a moment when they had no time to spare.

No digital channel for self-service registration

There was no online or mobile option for customers to register from home, on the go, or in-store via smartphone. This excluded a large and growing segment of digitally active shoppers who expected a more convenient alternative.

Staff lacked a digital tool for assisted registration

In-store staff who helped customers sign up had no dedicated tablet tool to support the process. Without a streamlined assisted registration flow, the in-person experience was also slower and more prone to data entry inconsistencies.

No prior experience with offshore development partnerships

The client had not previously worked with an external outsourcing company, which introduced an element of organisational adjustment. Aligning on communication expectations, documentation standards, and development workflows required careful management throughout the engagement.

Client Requirements

As part of their ongoing digital transformation efforts, the client sought to modernise the membership registration experience for both customers and in-store staff. To digitise the membership registration journey and remove the friction that was limiting sign-up rates, the client defined the following requirements for the new platform:

A web application accessible across all major device types

The portal needed to function reliably on personal computers (desktop and laptop), customer smartphones, and in-store tablets — covering both self-service and staff-assisted registration scenarios within a single application.

Distinct UX flows for self-service and staff-assisted registration

The application required differentiated user flows: a customer-facing flow optimised for independent use without staff involvement, and a tablet-based flow designed for store staff to guide customers through registration efficiently in a busy in-store environment.

Integration with existing backend membership systems

The new portal needed to connect seamlessly with the client’s existing membership and data infrastructure, handling validation, data submission, and downstream processing without disrupting systems already in production.

Japanese-language interface and delivery

All user-facing content and the full project delivery, including documentation, communication, and coordination, needed to be conducted in Japanese, reflecting the client’s language requirements and end-user audience.

SHIFT ASIA’s Solutions

The client provided complete product designs and detailed technical specifications. SHIFT ASIA’s responsibility was to implement those specs, deliver robust backend logic, design and deploy the supporting cloud infrastructure, and ensure quality through rigorous manual testing, all while coordinating closely with the client’s internal development team.

1. Multi-device web application built on Vue.js (Nuxt)

The frontend was developed using Vue.js with the Nuxt framework, resulting in a fully responsive web application that adapts seamlessly across devices. The interface was intentionally designed for simplicity, accommodating a wide range of users, including those with limited digital familiarity. Behind that clean surface, the team engineered conditional flows, input validation, and context-aware behaviour across all three usage modes: personal computer, customer smartphone, and staff-operated tablet.

2. Complex backend logic via AWS Lambda

While the UI presented a simple experience to end users, the backend business logic was significantly more complex. Registration flows involved multi-step validation, conditional routing, and integration points with the client’s existing membership infrastructure. SHIFT ASIA implemented this logic using AWS Lambda serverless functions, working closely with the client’s internal development team to ensure consistent data contracts and reliable processing throughout the registration pipeline.

3. Full cloud infrastructure design and deployment on AWS

SHIFT ASIA designed and deployed the complete cloud infrastructure to host and operate the application. The architecture was built for reliability, scalability, and security and is appropriate for a consumer-facing platform that handles personal data at a supermarket scale. Infrastructure decisions were made with the client’s long-term operational needs in mind, not just the requirements of the initial launch.

4. Comprehensive manual QA testing across all devices and flows

A dedicated testing team executed structured manual test cases across all supported devices and registration scenarios. This included both the self-service customer journey and the staff-assisted tablet flow, covering edge cases, validation error states, and cross-device consistency. Testing was integrated throughout the development cycle, not bolted on at the end, to ensure issues were identified and resolved before each milestone.

5. Japanese-language bridge engineering throughout

A dedicated Bridge Software Engineer (BrSE) facilitated all communication between the SHIFT ASIA development team and the client’s stakeholders in Japanese. This role was central to the project’s success, ensuring that technical requirements, change requests, and feedback were accurately translated in both directions, and that the cultural and organisational expectations of a Japanese enterprise client were consistently met.

6. Scalable team model and long-term maintenance

The team structure was dynamically adjusted throughout the project lifecycle. During the six-month initial build phase, the team peaked at 9 members — 5 developers, 3 testers, and 1 BrSE. As the application reached stability and entered maintenance mode, the team contracted to three members, providing the level of ongoing support the client actually needed without unnecessary overhead. This flexible model ensured cost efficiency throughout the more than two-year engagement.

Achieved Results

Following the launch of the digital registration portal, the client observed a significant increase in new membership sign-ups. The paper-based process had been the primary barrier to conversion; removing it led to an immediate, measurable increase in registrations. While exact figures have not been disclosed, the client confirmed that the volume of new members joining after the app’s introduction was notably higher than under the previous paper-only system.

Beyond registration volume, the launch extended the membership programme’s reach across a much wider range of customer touchpoints. Shoppers could now register independently at home via PC or mobile, in the moment via smartphone while in-store, or with staff assistance via tablet, eliminating the single point of failure that had previously constrained the programme’s growth.

The project also established a new standard for the client’s relationship with offshore development. Having had no prior experience working with an external outsourcing partner, there was an initial period of cultural adjustment. However, the quality of SHIFT ASIA’s technical delivery and the responsiveness of the team, particularly the Bridge SE’s role in facilitating clear communication, resulted in the client’s development lead rating SHIFT ASIA as the strongest offshore partner he had worked with across his career.
The application has remained in active production for over two years since launch, with SHIFT ASIA continuing to support ongoing maintenance and iterative development as the client’s requirements evolve.