.NET Full Stack Developer in Hyderābād, Telangana | Sanfour

About the Role

Sanfour is seeking a Senior .NET Full Stack Developer to join our Accounting & Finance pod in Hyderābād, Telangana, India. You will be instrumental in enhancing our payment, billing, and invoicing systems across the product suite, including Stripe Connect integrations, hosted payment pages, ACH/eCheck in the US, PAD/ACSS debit in Canada, recurring billing, payouts, trust accounting workflows, and reconciliation.

This is a hands-on senior individual contributor role where you will work across both front-end and back-end technologies, primarily React/Next.js and C#/.NET microservices. You will design, build, and maintain critical payment features and help migrate legacy payment processors to our unified payments gateway.

Key Responsibilities

• Architect and develop end-to-end full-stack payment features including UI, APIs, service logic, and data models for invoicing, billing, payment management, refunds, payouts, and reconciliation.
• Implement Stripe Elements, Payment Element, Checkout, and 3D Secure (3DS) / Strong Customer Authentication (SCA) on the front-end, while owning the corresponding PaymentIntents, webhook handlers, and persistence layers on the back-end.
• Build idempotent, retry-safe, and observable payment workflows with webhook-driven UI and responsible optimistic updates.
• Ensure ledger accuracy and trust accounting compliance with strict trust vs operating account separation.
• Mentor mid-level engineers through code reviews and set high technical standards within the pod.
• Collaborate on architecture decisions impacting both front-end and back-end stacks.

What You Bring

• Strong expertise in C# and .NET microservices development.
• Proficiency with React and Next.js frameworks for front-end development.
• Experience integrating payment gateways, especially Stripe Connect and related payment methods.
• Solid understanding of payment workflows, security protocols like 3DS/SCA, and financial reconciliation processes.
• Ability to write clean, maintainable, and testable code with a focus on reliability and scalability.
• Excellent problem-solving skills and ability to work independently in a fast-paced environment.

Location: Hyderābād, Telangana, India (On-site)

Employment Type: Full-Time

About Sanfour

Sanfour is committed to building innovative financial software solutions that simplify complex payment and accounting workflows for businesses worldwide.