01
8x
peak-traffic capacity
Headless commerce platform
Headless on Shopify Plus, commercetools, BigCommerce, or Saleor. CDN-first cache, autoscaling worker fleets, chaos-engineered failure modes ahead of peak.
Custom Software × Retail & E-Commerce
Custom Software for Retail & E-Commerce.
Headless commerce platforms, order management, loyalty engines, and customer-facing apps: engineered for peak-season scale, PCI-DSS compliance, and the operational rhythms retail actually runs on.
- PCI-DSS Level 1
- Aligned
- GDPR · CCPA
- Compliant
- SOC 2 Type II
- In flight
- Peak-season SLA
- Engineered
The reality
Retail software fails at the seams between commerce, fulfillment, and identity.
The pattern across retail engagements: a beautiful headless storefront with fulfillment integration that breaks at peak; an order management system held together with cron jobs; a loyalty engine scoped as phase 2; a peak-season run-up that consumes engineering for a quarter; and a customer-facing experience that doesn't survive the first Black Friday at scale. Retail software succeeds when the integrations and the peak-season reality are primary scope.
Prosigns ships retail engineering with the seams as primary scope. Headless commerce with rigorous order-management contracts; personalization with explicit data freshness SLAs; fulfillment integration designed for peak load; and the consumer privacy frame consumer-facing brands actually have to defend. CITADEL co-pilots PCI-DSS, GDPR, and CCPA; FORGE handles the build; NEXUS handles the platform under it.
Where it ships
6 workloads, scoped to retail & e-commerce.
Concrete applications where custom software unlocks measurable value inside retail & e-commerce delivery constraints.
- 02
Order management and fulfillment
Omnichannel order management, distributed inventory, fulfillment optimization, and the fulfillment-integration discipline that survives a Black Friday.
- 03
Loyalty and subscription
Loyalty engines, subscription billing, and customer data platforms integrated with the commerce stack. Identity-aware, privacy-respecting, audit-defensible.
- 04
Customer-facing apps
iOS, Android, and web apps with offline-first patterns where appropriate. Identity-integrated with the commerce stack, accessibility-first, and the operational tooling consumer brands actually need.
- 05
B2B commerce
Merchant portals, dealer / wholesaler platforms, and the procurement-side integration B2B retail actually requires. Identity, pricing, contract management.
- 06
Search and product discovery
Algolia, Elasticsearch, OpenSearch, and vector-search-backed product discovery. Faceted filters, merchandising overrides, semantic search with embeddings.
How we engage
4 phases, named in the SOW.
Each phase has a deliverable, an owner, and an acceptance criterion calibrated to retail & e-commerce delivery.
- 01
Peak-season-first architecture
Discovery includes peak-load modeling: traffic, conversion path, fulfillment volume, failure modes from post-mortem corpus. Architecture sized to peak with autoscaling, CDN-first cache, chaos-engineered failure modes.
- 02
Integration as primary scope
ERP, OMS, WMS, payments, fulfillment, and identity integrations designed before storefront work begins. Explicit interface contracts, retry semantics, fallback for partner outages.
- 03
Privacy-respecting design
Consent management integrated at the data layer. Honored Global Privacy Control, regional differences (GDPR / CCPA / PIPEDA) handled architecturally, explicit retention per data class.
- 04
Operating cadence for retail rhythms
Pre-peak readiness reviews, peak-season war room, post-peak retrospective, and the FinOps cadence that returns the cloud bill to baseline. Most engagements continue through multiple seasons.
Capabilities
What’s in scope.
- Headless commerce platforms: Shopify Plus, commercetools, BigCommerce, Saleor
- Order management and fulfillment with omnichannel inventory
- Loyalty engines, subscription billing, customer data platforms
- Customer-facing apps: iOS, Android, web with offline-first patterns
- B2B commerce: merchant portals, dealer / wholesaler platforms
- Search and product discovery: Algolia, OpenSearch, vector retrieval
- Payments integration: Stripe, Adyen, Braintree, regional gateways
- Identity & consent: Auth0, Okta, customer data platform integration
Stack
Tools we use in production.
- Frontend
- Next.jsReactTailwindVercelCloudflare
- Commerce
- Shopify PluscommercetoolsBigCommerceSaleor
- Backend
- Node.jsGoPythonPostgreSQLRedisKafka
- Search
- AlgoliaElasticsearchOpenSearchPinecone
- Payments
- StripeAdyenBraintreeBoltAffirm / Klarna
- Mobile
- React NativeSwift / SwiftUIKotlin
Compliance overlay
Frameworks we engineer to.
Every retail & e-commerce engagement carries the evidence collection that procurement and audit teams expect on day one.
- 01
PCI-DSS Level 1
Cardholder-data scope minimized through tokenization at the network edge, segmentation that isolates AI / personalization from PCI flow, and the QSA-supportable evidence pipeline running continuously.
- 02
GDPR / CCPA / PIPEDA
Consent management integrated at the data layer. GPC signals honored. Regional differences handled architecturally. Right-to-erasure flows engineered. Explicit retention per data class.
- 03
Consumer protection
Accessibility (WCAG 2.2 AA) by design, fair-pricing guardrails for dynamic pricing where applicable, transparent merchandising and recommendation logic.
- 04
SOC 2 Type II
Continuous evidence collection across control activity logs, change-management, access reviews, vendor risk records.
Selected work
Quantified outcomes, not adjectives.
Where this fits
Open the parent practice or industry hub.
Common questions
Asked before the first call.
- 01
Headless commerce: Shopify Plus, commercetools, or build?
Workload-dependent. Shopify Plus wins for D2C brands with strong product catalog and limited backend complexity. commercetools wins for enterprise with custom commerce flows. BigCommerce is competitive in the middle. Custom builds make sense rarely. We tell you which fits, in writing.
- 02
Can you handle peak-season scale?
Yes: peak-season readiness is part of the discipline. Architecture sized to peak with explicit headroom, chaos-engineering 4–6 weeks before peak, war-room cadence during peak weeks, post-peak retrospective. Most clients see 5–10x peak-traffic capacity vs prior architecture.
- 03
How do you handle international rollouts?
Multi-region commerce, currency, language, tax, and fulfillment localization as primary scope. Edge-routed architectures for international latency, region-specific data residency (GDPR / CCPA / PIPEDA), and the operational discipline international peak rhythms require.
- 04
Can you integrate with our ERP / OMS / WMS?
Yes: Manhattan, Oracle, NetSuite, SAP, Microsoft Dynamics, and most major OMS / WMS platforms in our active engagement portfolio. Integration is primary scope (not phase 2) with documented contracts, dual-write windows, and explicit fallback.
- 05
Do you do mobile apps for retail?
Yes: iOS, Android, and React Native depending on team and product fit. Identity-integrated with the commerce stack, push notifications and in-app messaging, offline-first patterns where appropriate, and accessibility-first.
- 06
What does a retail custom-software engagement cost?
Architecture: 4–6 weeks, $50K–$150K. Headless replatform: 5–10 months, $400K–$1.5M. OMS / fulfillment modernization: 6–12 months, $500K–$1.5M. Multi-region rollouts: $1M–$3M+. Managed Services: $30K–$150K monthly retainer.
Talk to us
Bring us a hard Custom Software problem. We’ll bring a senior Retail & E-Commerce engineer.
A senior engineer plus the FORGE department lead joins the first call, both with prior retail & e-commerce delivery experience.