Client
Zadinga
Vision

“Transform every small shop into a smart mini-warehouse & storefront.”

Pre-Engagement Tech

Ionic hybrid app, PHP Laravel API, MySQL single-tenant DB

Zadinga

Zadinga
Case Study

Executive Summary

Zadinga set out to “hand retail super-powers to every corner-shop.” Its beta app won critical praise, yet scaling beyond a few hundred outlets exposed painful gaps: manual stock imports, multi-second POS latency, and no pathway to e-commerce. The executive team needed a single cloud platform that would synchronise real-time inventory, omnichannel orders, and GST-ready billing—all while working flawlessly on low-end Android devices and limited bandwidth.

Steady Rabbit deployed a Core-Flex Micro-GCC squad and, across nine sprints, delivered a ground-up rewrite that:

  • Pushed stock-sync latency down to < 300 ms, enabling real-time inventory accuracy of 98.7 %
  • Introduced an event-driven pricing engine that reduced out-of-stock incidents by 41 %
  • Enabled one-click Shopify & WhatsApp catalog sync, doubling monthly online GMV in six weeks
  • Launched an offline-first React-Native POS app with p95 billing time of 820 ms—critical for India’s high-volume shops
  • Cut store onboarding from ten days to under 72 hours through self-service SKU mapping

Predictability mattered: the project finished two days ahead of plan, passed PCI quarterly scans with zero critical findings, and helped Zadinga close a ₹42-crore Series A round.

Client Profile & Business Context

  • Client
    Zadinga

    Retail SaaS start-up backed by 1K Kiranas & Anchit Capital

  • Founded

    2020, New Delhi

  • Vision

    “Transform every small shop into a smart mini-warehouse & storefront.”

  • Pre-Engagement Tech

    Ionic hybrid app, PHP Laravel API, MySQL single-tenant DB

  • Operational Reach

    750 pilot outlets across Delhi NCR & Bengaluru

Home-grown ERP solutions ignore India’s 13-million micro-retailers. Zadinga’s beta proved appetite for a lightweight stock manager but fell short when shops demanded:

  • Instant billing during rush hour (POS loops must be ≤ 1 s)
  • Accurate stock-turn metrics without barcode guns
  • “Sell online tomorrow” capability to survive lockdowns & competition
  • GST e-invoicing compliant reports for auditors

Missing these hurt retention: 40 % of trial stores churned within 60 days. Investors made funding conditional on a stable, scalable V2 launch in under five months

Problem Statement / Key Challenges

High POS latency

Technical Gap

Hybrid app froze at checkout; p95 4.7 s

Stakes

Lost customers & cashier frustration

Batch stock updates

Technical Gap

CSV imports nightly; inventory accuracy 71 %

Stakes

Overstock, dead capital, shelf-outs

Lack of e-commerce bridge

Technical Gap

No API to Shopify or WhatsApp catalog

Stakes

Shops missed pandemic-driven online sales

Single-tenant schema

Technical Gap

Each store its own DB; ops nightmare

Stakes

Scaling beyond 1 000 shops impossible

Manual onboarding

Technical Gap

10-day SKU mapping via Excel & calls

Stakes

Sales cycle > 6 weeks; CAC ballooning

Our Approach

Micro-GCC Squad Design

Layer
Composition
Mission
Core (6)
Squad Lead, 2 React-Native Engineers, Backend Go Engineer, DevOps, QA Automation
Re-architect platform, deliver omnichannel feature set in < 5 mo
Flex (2)
Cloud-Security Lead (PCI DSS), Data Engineer (ETL & Analytics)
Spike tasks: PCI scope, analytics warehouse
Buffer (1)
Shadow Mobile Dev
Covers PTO/attrition—zero cost to Zadinga

Shift-Left Governance

  • Seven Plan-Left gates enforced in Jira; block story entry into Dev until persona, acceptance, risk, arch sketch, estimate, capacity (via SteadCAST), and test note locked.
  • SteadCAST dashboards tracked Risk-High WIP, test-note coverage, velocity forecast daily.
  • 30-min weekly steering with founders; burn-up and KPI milestone review.

Discovery Sprint 0

  • Design sprint with kiosk & kirana owners—mapped five critical cashier flows.
  • Architecture blueprint: event-driven micro-services, offline-first client, GraphQL BFF.
  • Defined guard-rail KPIs: p95 billing ≤ 1 s, stock accuracy ≥ 95 %, onboarding ≤ 3 days.

Outcome: backlog sized at 110 SP/sprint capacity, go-live date fixed for Week 18.

Solution Delivered

Cloud-Native Micro-Services

  • Go + gRPC inventory service with DynamoDB single-table design partitioned by StoreID → constant-time lookups.
  • Kafka event bus streams stock deltas; Redis streams provide offline cache reconciliation.
  • GraphQL BFF aggregates orders, inventory, and analytics—simplifying app calls to a single endpoint.

Offline-First POS & Mobile App

  • React-Native app uses SQLite & WatermelonDB for local queue; sync resumes seamlessly after network loss.
  • JS bridge optimised; billing screen loads in 160 ms; p95 transaction complete time 820 ms at 10 K items catalogue.
  • Barcode scanning via device camera; fallback manual SKU search < 300 ms.

Smart Onboarding Wizard

  • CSV or XLSX ingest runs client-side; fuzzy match algorithm (Jaro-Winkler) auto-maps 87 % of SKUs to GST code.
  • SLA: Onboarding 10 days → < 72 h.

Omnichannel Bridge

  • Shopify, WooCommerce, and WhatsApp Business API connectors publish updated catalog & stock every 60 s.
  • Webhooks ingest online orders back into same Kafka stream; single source of truth.

Analytics & Data Lake

  • AWS Glue ETLs Kafka streams to Redshift; Power-BI dashboards show sell-through, ABC classification, dead stock.
  • Data Engineer (Flex) delivered 10 canned reports in two sprints.

Security & Compliance

  • PCI DSS SAQ-A scope via Razorpay JS tokenisation.
  • AppSecrets in AWS Secret Manager; IAM strict least-privilege—auditor passed with zero high findings.

Execution Journey

Sprint
Key Milestones
KPI Shift
Predictability
0 (Weeks 1-2)
Discovery, arch doc, backlog
POS baseline 4.7 s
100 % gate pass
Sprints 1
DynamoDB schema, Kafka PoC
Inventory lookup 450 ms
Risk-High WIP 18 %
Sprints 2
React-Native skeleton, offline cache
Billing p95 2.9 s
Buffer unused
Sprints 3
GraphQL BFF, image CDN
App FCP 1.1 s
Scan bugs -62 %
Sprints 4
Shopify connector, barcode scan
Stock accuracy 71 % → 90 %
Flex Data Eng 24 h
Sprints 5
Fuzzy SKU mapping, GST codes
Onboarding 10 d → 4 d
No schedule slip
Sprints 6
Redis stream cache, load tests
Billing p95 1.1 s
Hot-fix Fridays 2→0
Sprints 7
Power-BI dashboards, WhatsApp API
Dead stock −18 %
Budget +4 %
Sprints 8
Blue/green rehearsals, PCI scan
CVEs critical 0
--
9 (Week 18)
Play Store, App Store, web portal launch
Activation +23 pp
Delivered 2 days early

Buffer developer stepped in when a mobile engineer fell sick in sprint 6—velocity dip ,0 SP.

Business Outcomes & Impact

Stock-turn velocity +33 % – faster sell-through freed ₹9.8 crore cash across pilot stores.

Online GMV 2× within six weeks via Shopify & WhatsApp sync.

Inventory accuracy 98.7 % (↑27 pp).

p95 billing time 4.7 s → 0.82 s (5.7× faster).

Out-of-stock incidents −41 %, driving footfall loyalty.

Store onboarding 10 days → 72 hours; CAC reduced 19 %.

PCI DSS pass at first attempt; quarterly ASV scans show 0 critical weaknesses.

99.94 % availability first 90 days (committed ≥ 99.9 %).

Helped secure ₹42 crore Series A; term sheet cites “enterprise-grade, scalable tech stack.”

Predictability premium (≈ 7 % rate uplift) paid back in one sprint by avoiding a projected two-week slip that would have cost ~₹1.7 crore in lost GMV.

Why Steady Rabbit?

Core-Flex Micro-GCC

Added Data & Security SMEs in 48 h; Buffer bench absorbed leave with no cost.

SteadCAST Predictability

Real-time capacity & risk analytics delivered 98 % sprint compliance.

Shift-Left Gates

Seven Plan-Left gates cut re-work 38 % while adding < 2 h per sprint.

Retail Domain Insight

Field visits to kiranas informed offline-first design & Fuzzy SKU mapping.

Outcome-Linked Engagement

KPIs (stock-turn, billing latency, onboarding time) tied to squad incentives.

Transparent Partnership

Weekly demos, Slack war-room, open burn charts—zero surprises.

Client Testimonial

Steady Rabbit

Co-Founder & CTO

Zadinga

Steady Rabbit turned our MVP into a production beast. Billing is lightning-fast, inventory is finally real-time, and our shops went online overnight. Their Micro-GCC model delivers speed and certainty.