Case Studies

Work that ships to 38 storefronts.

Six interlocking systems at Walmart Global Tech — two platforms, ~$11/day to ~$767/day of cloud spend, sub-50ms customer reads, and a 150× homepage scaling story. Pick a card to read the architecture and what I shipped.

6 case studies2 platforms (PRISM, Tempo)38 storefronts150× homepage scale

PRISM

Content + personalization platform that decouples copy/creative from Tempo modules — drove Walmart homepages from 20 to 3,500+.

2 case studies

PRISM · BackendIn production

cxt-msg-asset-service

The PRISM system of record — Java 21, partitioned Postgres, Kafka outbox

150× Homepage scale

+6.8% mWeb ATF CTR

+16% Editor efficiency

12k+ / 24k+ Messages / Assets

Java 21Spring Boot 3.5Hibernate JPAQueryDSL 5PostgreSQLLiquibaseKafkaForklift outboxOpenTelemetryGKE / IstioAkeyless

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PRISM · UIIn production

Prism V3 UI

The editor surface that drove 150× homepage scaling

150× Homepages launched

+16% Editor efficiency

48% Offshore shift

6 Downstream services

Next.js 15 (App Router)React 19TypeScript 5TanStack QueryReact Hook Form + ZodLiving DesignFastify BFFA2A signature signingW3C trace propagation

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Tempo

Walmart’s configuration-based CMS for merchandising — 38 production storefronts, separated authoring write-path from a sub-50ms customer read-path.

4 case studies

Tempo · UIActive rollout

Tempo V3 UI + Fastify BFF

Ground-up rewrite of Walmart’s merchandising CMS authoring tool

38 Production tenants

~60% Build time ↓

>92% Trace propagation

15 Downstream services

Next.js 15 (App Router)React 19TypeScript 5FastifyTanStack QueryReact Hook Form + ZodOpenTelemetryOpenObserveLiving DesignPlaywrightWCNP / KITT / Concord / Akeyless

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Tempo · BackendIn production

Tempo Service

The Java authoring backend behind Tempo — 38 tenants, Oracle → Postgres on GCP

~27 TPS Authoring traffic

38 Tenants

~65 Seed PRs / month

~$767 / day Cloud spend

Java 17Spring Boot 3.5Apache CXF (JAX-RS)Hibernate 6 + QueryDSL 5Oracle (legacy) + PostgreSQL (modernized)Meghacache (Memcached)KafkaStrati AF + PalletWCNP / GKEIstio mTLS

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Tempo · Runtime Customer hot pathActive rollout

Tempo Runtime — Node → Go, Cosmos → Cassandra

Customer hot path — sub-50ms p95, 100K reads/sec/region

35–45 ms p95 latency (Go)

100K Reads/sec/region

82% Memory ↓

18× Cold start ↓

Go 1.24EchoApache CassandraRistretto (L1)Meghacache (L2)Kafka (Content Sync)OpenTelemetryIstioWCNP / KITT (tenant-group sharded)Echonyx edge

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Tempo · Legacy UISunset

Tempo V2 UI (cxt-tempo)

The legacy editor that runs in parallel with V3 during rollout

38 Tenants supported

25+ GraphQL provider schemas

Module Version diff

React 17TypeScriptRedux ToolkitRedux PersistApollo GraphQLKoa (Saber)MongooseEmotion / Saber UIFormik + YupAJV (JSON Schema)Jest + RTLNx monorepo

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