Sr. Software Engineer (Payments & Data)

Qu; United States; Hybrid; USD 130,000 - 170,000; Full time

Job summary

Qu is seeking a Senior Software Engineer to own both payments integrations and the data platform that makes transactions visible and reconciled for merchants. You will work on a leading enterprise restaurant technology platform (POS, kiosks, digital ordering) within a scaled agile team distributed across geographies.

You’ll build payment integrations with PSPs, design reconciliation pipelines and dashboards, mentor engineers, and help drive high-quality code in a cloud-based, hybrid environment.

Qualifications

• 7+ years in software development with 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.
• Experience building data reporting UIs that present financial data to non-technical users.

Responsibilities

• Build and maintain payment integrations with PSPs across card-present and card-not-present 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.
• Design and build the reconciliation platform UI and back-end, ingest settlement files and classify exceptions.
• Create payment analytics dashboards and reports for merchant back-office users.
• Translate business requirements into working solutions; mentor engineers; maintain docs and runbooks.
• Participate in code reviews and drive code quality across payment services.

Skills

Payments domain knowledge

C# / .NET

APIs & microservices

PSP integration

Data reporting UI

Data reconciliation

Tools

AWS

MongoDB

SQL

Elasticsearch

Git

Azure DevOps Pipelines

Docker

Terraform

Job description

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 inC# / .NETbuilding 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 buildingdata reporting UIs(Vue.js, Angular, or React) that present financial data to non-technical users
• Experience withdata reconciliation logic: cross-system matching, discrepancy identification, exception classification
• AWSservices: ECS, SQS, DynamoDB, RDS, CloudWatch, Parameter Store
• MongoDBand SQL databases
• Elasticsearchor 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.