.NET Enterprise Architect with Azure Paas
Remote
Rate - $90-100/hour on W2 NEXT GEN IT
Exp: 16+yrs
This role is remote, but must be in EST or CST time zones. It’s very specialized, and we need someone who has built Payment System Platforms for retail/eCommerce applications.
Candidates from large retailers such as Wal-Mart, Kroger, Sam’s Club, Home Depot, Lowe’s, etc will be highly prioritized.
Must Haves - -
- 10+ years of experience building payment systems
- Expert level C#/ .Net 8 - must be currently hands on
- Azure PaaS experience
- Kafka experience (in production)
Domain Ownership
· Own the domain's architecture, technical roadmap, and key decisions
· Define domain boundaries, domain model, and shared vocabulary
· Decide which service or workflow owns each business operation
· Write ARB-ready specs and ADRs
Architecture & Design
· Design idempotent, exactly-once operations (sagas, compensation, outbox/inbox, reconciliation)
· Define API and event contracts with peer domains (OpenAPI, JSON Schema, Protobuf)
· Establish trust boundaries: who computes data, who validates it, and what consumers can rely on
Workflows & Messaging
· Build durable workflows on Temporal, including Nexus cross-domain calls
· Set versioning standards for long-running workflows (patching, build IDs, replay testing)
· Design Kafka domain events with schema governance, retries, and dead-letter queues
Payments
· Architect payment workflows across the order lifecycle: create, edit, cancel, finalize, refund
· Design multi-tender orchestration across credit/debit, EBT SNAP, and EBT WIC
· Architect processor and benefit-provider integrations: auth, capture, void, refund, reversal
· Handle gateway timeouts and unknown outcomes without double-charging or leaving ghost charges
· Ensure EBT SNAP and WIC compliance with USDA FNS and state program rules
· Lead PCI DSS scope reduction, tokenization (network tokens, DPAN), encryption, and key rotation
· Extend the domain to new tenders such as Apple Pay, Google Pay, and split tender
· Support 3P marketplace payments: multi-capture, over-capture rules, and split settlement
· Partner with Finance on reconciliation, TLOG reporting, and general-ledger accuracy
· Define payment SLOs: auth rate, capture success, refund success, and compensation failures
Reliability & Quality
· Build resilience with Polly and Temporal retry policies
· Keep payment authorization well within checkout timeout budgets across Azure and Google Cloud Platform
· Instrument tracing across HTTP, Kafka, and Temporal with OpenTelemetry
· Set the testing strategy: unit, contract, replay, gateway simulation, and load
Leadership
· Review production code and mentor senior engineers
· Lead feature-flagged migrations off legacy paths
· Use AI coding agents and context engineering to speed up delivery
