Описание

This role is for a Domain Architect focusing on building payment systems with a strong background in C#/.NET and Azure PaaS.

Responsibilities

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
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
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
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
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
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

Requirements

10+ years engineering experience
5+ years building payment systems
Domain-driven design: bounded contexts, domain events, context mapping
Expert C# / .NET 8+ and still codes
Temporal (preferred) or similar durable workflow engine in production
Kafka in production
Azure PaaS: App Service, Cosmos DB, APIM, Key Vault or similar technology on Google Cloud Platform
Containerization, running code in Kubernetes
Idempotency, saga, and reconciliation patterns in production
PCI DSS and tokenization
OpenTelemetry or APM observability design
Track record of aligning multiple teams on a shared architecture

Nice to have

Temporal Nexus or Worker Versioning
EBT SNAP / WIC processing
Digital wallets: Apple Pay, Google Pay
Gateway APIs: Aurus, Adyen, Fiserv, Worldpay, Chase
Network tokens, DPAN, multi-capture, marketplace split settlement
Multi-cloud: Azure + Google Cloud Platform
LaunchDarkly-driven migrations
.NET Aspire, Testcontainers, Mockoon/WireMock
Retail finance feeds (TLOG, sales audit, GL)
Grocery/omnichannel retail
Google Cloud Platform experience

We offer

Long Term Contract
Pay rate: 80 - 85 USD per hour