Software Engineer Specialist (C#, .Net, Rest API)—10+ Years Experience -Pune/Bangalore

Overview

Make your mark at one of the biggest names in payments. We’re looking for an InP - Software Engineer Specialist to join our ever-evolving Payrix Team and help us unleash the potential of every business.

What you’ll own as – InP - Software Engineer Specialist

As a Backend C# Engineer, you’ll be part of a high-impact team building the next-generation embedded payments platform for software providers. You’ll work with modern .NET technologies to design scalable, secure, and modular services that power seamless payment experiences. Your work will directly enable Independent Software Vendors (ISVs) to launch, grow, and manage embedded payments programs with minimal friction and maximum control.

• Designing and developing scalable backend services using C# and .NET
• Building modular APIs and microservices that support onboarding, payment processing, payouts, reconciliation, and reporting
• Integrating with key systems including Express Gateway, Hosted Payments Pages, TriPOS, FraudSight, and Payrix services
• Collaborating with frontend, product, and infrastructure teams to deliver end-to-end features
• Writing clean, maintainable, and testable code following TDD principles
• Participating in code reviews and contributing to architectural decisions
• Ensuring performance, security, and reliability across distributed systems
• Supporting CI/CD pipelines and infrastructure automation
  
  

• 10-12 years of experience in backend development with strong expertise in C# and .NET
• Solid understanding of microservices architecture and distributed systems
• Experience with RESTful API design and API-first development
• Strong grasp of software design principles and patterns (e.g., SOLID, DDD, Repository, Factory, Observer)
• Experience with relational databases (PostgreSQL) and caching systems (Redis)
• Familiarity with event-driven architecture and message brokers (Kafka)
• Experience with automated testing and TDD using frameworks like xUnit, NUnit, or similar
• Good understanding of CI/CD pipelines and DevOps practices
• Excellent communication skills and a collaborative mindset
  
  

• Core Backend: C#, .NET, PostgreSQL, Redis, Kafka
• Architecture & Patterns: Microservices, Domain-Driven Design, API-first, Event-driven systems
• Infrastructure & DevOps: Kubernetes (AWS), Terraform, GitHub Actions, Jenkins
• Testing & Quality: xUnit, NUnit, TDD, Playwright (for end-to-end flows), OpenTelemetry
• Security & Identity: KeyCloak, OpenFGA
• Monitoring & Observability: Grafana, Prometheus, OpenTelemetry
• AI Integration (Nice to Have): Amazon BedRock, Claude Sonnet, Titan Embedding Model, LangChain, OpenSearch
  
  

• Experience in fintech, payments, or banking platforms
• Exposure to embedded payments or white-labeled product development
• Familiarity with context engineering or retrieval augmented generation (RAG)
• Contributions to open-source or internal developer tooling
  
  

Our Tech and Security teams keep us moving each day, no matter where we are in the world. From the hardware to the networks and everything between, they humbly make it all happen.

This platform is being built on proven Worldpay and Payrix infrastructure, with a bold vision to embed payments expertise directly into platform workflows—eliminating complexity and unlocking new revenue streams for our partners. Manage the product throughout its lifecycle from concept to end-of-life.

What Makes a Worldpayer

What makes a Worldpayer? It’s simple: Think, Act, Win. We stay curious, always asking the right questions and finding creative solutions to simplify the complex. We’re dynamic, every Worldpayer is empowered to make the right decisions for their customers. And we’re determined, always staying open and winning and failing as one.

Does this sound like you? Then you sound like a Worldpayer. Apply now to write the next chapter in your career.

LinkedIn # ( Susmita Tripathy)