Principal .NET Software Engineer- Cloud Payments Platform jobs in United States
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Versapay · 20 hours ago

Principal .NET Software Engineer- Cloud Payments Platform

positionUnited States
timeFull-time
remoteRemote
senioritySenior Level, Lead/Staff
money$150K/yr - $180K/yr
date10+ years exp

Versapay is a company that automates accounts receivable to enhance cash flow and business growth. They are seeking an experienced .NET Principal Software Engineer to modernize their payments infrastructure, improve scalability and security, and design new distributed services.

Enterprise SoftwareFinancial ServicesFinTechPaymentsSaaSSoftwareTransaction Processing
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Growth Opportunities
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H1B Sponsor Likelynote

Responsibilities

Own and evolve core payment services for online (CNP), device-based EMV (CP), digital wallets (e.g., Apple Pay, Google Pay), and payment facilitator/orchestration flows
Modernize and improve existing components into more cloud-native, distributed architectures using containers on AWS/Azure
Own and extend end-to-end payment workflows: authorization, capture, void, refund, tokenization, clearing, funding, settlement, and multi-source reconciliation
Expand capabilities for international payments, including multi-currency and cross-border flows
Integrate with payment service providers (PSPs), EMV card readers, and device SDKs using secure, standards-based messaging
Improve and maintain CI/CD pipelines in GitHub Actions (automated builds, tests, security scans, packaging, deployments)
Design and evolve test automation strategy, covering domain-level logic, API contracts, and integration with external processors and devices
Strengthen platform reliability through observability (metrics, logs, traces), fault-tolerant design, and automated operational workflows
Partner with Product, Security, Compliance, and Operations to deliver features that balance customer experience, regulatory requirements, risk, and operational robustness
Mentor engineers, lead design and architecture discussions, and influence the long-term strategy for the payments platform

Qualification

C#.NETSQLCloud-native architecturePayments experienceCI/CD automationAWSAzureAPI designObservability toolingSoft skills

Required

Significant experience (typically 10+ years) of professional engineering with expert proficiency in C#, .NET, and SQL
Deep experience in payments: online payments, EMV device-based transactions, digital wallets (e.g., Apple Pay, Google Pay), PayFac/orchestration flows, bank account rails (ACH/EFT), and international/multi-currency payment flows
Proven ability to modernize production financial systems into cloud-native, distributed architectures
Familiarity with monitoring and observing distributed systems using modern observability tooling
Proven ability to work cross-functionally with Product, Security, Compliance, and Operations, and to represent engineering effectively to non-technical stakeholders
Experience using AI-assisted development tools to enhance productivity and code quality
Deep hands-on experience with several of the following: ISO 8583 transaction messaging, ISO 20022 data models and payment messaging, DUKPT key-management and secure device cryptography, Hardware Security Modules (HSMs) and secure key lifecycle, EMV payment kernels and card/device authentication flows
Strong knowledge of: Modern API and integration design (RESTful services), asynchronous messaging/queueing, caching, event-driven architecture, high-availability patterns
AWS or Azure, containerization, orchestration, and CI/CD automation
PCI-DSS, encryption, tokenization, key-rotation, and secure coding principles

Preferred

Experience with multi-region cloud architecture and distributed data patterns
Experience with modern UX/front-end development (e.g., JavaScript/TypeScript)

Company

Versapay

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Versapay is a Fintech company offering an accounts receivable efficiency suite that simplifies the invoice-to-cash process.
dateFounded in 2006
location
Miami, Florida, USA
people-size201-500 employees
web-link
http://www.versapay.com

H1B Sponsorship

Versapay has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2024 (2)
2023 (1)
2021 (1)

Funding

Current Stage
Public Company
Total Funding
$33.95M
Key Investors
National Bank of Canada
2019-12-13Acquired
2019-11-05Post Ipo Debt· $4M
2018-09-26Post Ipo Equity· $7.06M

Leadership Team

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Carey OConnor Kolaja
Chief Executive Officer, Board Member
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Ed Neumann
Chief Financial Officer
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Recent News

Payments Dive
Great Hill raises $7B fund
2025-09-10
Bank Innovation
KeyBank taps Versapay for AI-driven accounts receivable
2025-07-16
Paypers
KeyBank launches KeyTotal AR, powered by Versapay
2025-07-11
Company data provided by crunchbase