As a Principal .NET Software Engineer at Versapay, you will modernize payments infrastructure, improve scalability, design distributed services, and take ownership of payment workflows while collaborating with various teams to enhance customer experience.
About Versapay 🚀
Versapay turns accounts receivable (AR) into a competitive advantage.
Inefficient AR processes slow cash flow and stall growth. Versapay removes friction, unlocks working capital, and accelerates momentum — giving finance leaders the clarity and control they need to drive business forward.
Versapay automates accounts receivable, removing barriers to collecting and reconciling B2B payments. Our solutions connect finance teams, customers, and business systems in one ecosystem to ensure cash flow clarity. With over 10,000 customers and 5M+ companies transacting on the platform, Versapay processes over 110M transactions and $257B annually.
Think you might be the next Veep to join? Read on!!
We are looking for an experienced .NET Principal Software Engineer to evolve and modernize our payments infrastructure, improve scalability and security, and design new distributed services where they add the most value. You’ll have meaningful ownership over critical payment services and the opportunity to influence technical direction across the platform.
You’ll contribute to an established payments platform that our customers use every day, with opportunities to strengthen its architecture and extend its capabilities. You’ll partner closely with Product, Security, Compliance, and Operations, and collaborate with other teams to move shared initiatives forward creating a better experience for our customers.
What You'll Do:
- Platform & Architecture:
- 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.
Payment Flows:
Delivery & Reliability:
Collaboration & Leadership:
What You'll Bring
- 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
- 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
- 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
- Experience with multi-region cloud architecture and distributed data patterns
- Experience with modern UX/front-end development (e.g., JavaScript/TypeScript)
Deep hands-on experience with several of the following:
Strong knowledge of:
Nice to Haves:
#LI-Remote
We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
Top Skills
.Net
AWS
Azure
C#
Emv
Github Actions
Iso 20022
Iso 8583
JavaScript
Pci-Dss
SQL
Typescript
Similar Jobs
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
This role involves leading quality assurance for CrowdStrike Falcon Sensor, focusing on customer-centric testing, framework development, stress testing, team leadership, and risk management across products.
Top Skills:
Ci/Cd PipelinesCloud Service ValidationKernel-Level TestingOperating SystemsTest Automation
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
Develop and operate cloud systems for runtime protection, collaborating on scalable solutions while ensuring system reliability and performance at scale.
Top Skills:
CassandraGoKafkaKubernetesOpensearchRabbitMQRedis
Automotive • Cloud • Greentech • Information Technology • Other • Software • Cybersecurity
The Business Process Design & Improvement Analyst II analyzes and improves business processes, tracks KPIs, and collaborates with teams to enhance operations.
Top Skills:
MS OfficeSalesforce
What you need to know about the Austin Tech Scene
Austin has a diverse and thriving tech ecosystem thanks to home-grown companies like Dell and major campuses for IBM, AMD and Apple. The state’s flagship university, the University of Texas at Austin, is known for its engineering school, and the city is known for its annual South by Southwest tech and media conference. Austin’s tech scene spans many verticals, but it’s particularly known for hardware, including semiconductors, as well as AI, biotechnology and cloud computing. And its food and music scene, low taxes and favorable climate has made the city a destination for tech workers from across the country.
Key Facts About Austin Tech
- Number of Tech Workers: 180,500; 13.7% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Dell, IBM, AMD, Apple, Alphabet
- Key Industries: Artificial intelligence, hardware, cloud computing, software, healthtech
- Funding Landscape: $4.5 billion in VC funding in 2024 (Pitchbook)
- Notable Investors: Live Oak Ventures, Austin Ventures, Hinge Capital, Gigafund, KdT Ventures, Next Coast Ventures, Silverton Partners
- Research Centers and Universities: University of Texas, Southwestern University, Texas State University, Center for Complex Quantum Systems, Oden Institute for Computational Engineering and Sciences, Texas Advanced Computing Center
