Sr. Software Engineer (Payments & Data)

At Qu you will: Work on building the leading enterprise restaurant technology platform (POS, kiosks, digital ordering). We're looking for a Senior Software Engineer who can own both sides of our payments story: building the integrations that process transactions, and building the data platform that makes those transactions visible and reconciled for our merchants. You’ll join a scaled agile team distributed across multiple geographies, working on cloud-based and cloud-hybrid architectures that process high-volume restaurant payments daily. Payment Processing & Integration Build and maintain payment integrations with PSPs across card-present (EMV terminal) and card-not-present (hosted/online) channels Own terminal-to-cloud payment flows: device initialization, transaction processing, Store & Forward, and webhook-based reconciliation Serve as a subject matter expert across the full payment stack, from terminal hardware through gateway to settlement Payment Data, Reporting & Reconciliation Build the reconciliation platform (UI and back-end) that matches POS transactions against PSP settlement/payout records and surfaces discrepancies Design matching engines and data pipelines that ingest settlement files, normalize records, and classify exceptions (voids, partial refunds, abandoned checks, offline payments) Create payment analytics dashboards and reports (PAR insights, payout exports, transaction drill-downs) for merchant back-office users Technical Leadership Translate business requirements into working solutions; mentor engineers; maintain documentation and runbooks Participate in code reviews and drive code quality across payment services What We’re Looking For: 7+ years in software development with meaningful payments or financial data exposure 5+ years in C# / .NET building APIs and microservices Hands-on PSP integration experience: gateway APIs, terminal APIs, management APIs, webhook notifications EMV terminal integration: device pairing, transaction flows, certification, in-store troubleshooting Fluency in payment domain concepts: acquirers, issuers, settlement (gross/net), chargebacks, PCI DSS, tokenization, PAR, authorization vs. capture, Store & Forward Experience building data reporting UIs (Vue.js, Angular, or React) that present financial data to non-technical users Experience with data reconciliation logic: cross-system matching, discrepancy identification, exception classification AWS services: ECS, SQS, DynamoDB, RDS, CloudWatch, Parameter Store MongoDB and SQL databases Elasticsearch or similar for transaction data querying Git, Azure DevOps Pipelines, Docker, Terraform Bonus: EBT payment processing or gift card systems Fraud detection/prevention systems Restaurant/QSR industry experience Mobile wallets (Apple Pay, Google Pay) International or multi-merchant payment platforms Terminal management and remote diagnostics Who You Are High ownership across both code and data. You don’t treat the reporting side as someone else’s problem. Financially precise. You understand that off-by-one-cent errors in reconciliation have real business impact. Comfortable bridging payment infrastructure engineering and data/reporting needs in the same sprint. Strong communicator who can explain payment flows to both engineers and business stakeholders. Strategic thinker who balances immediate fixes with long-term platform goals. Intellectually curious, willing to push new approaches to payment and data problems.