Sr. Software Engineer (Payments)

Location: Permanent, full-time, fully remote within the U.S. and select Canadian Provinces only. Employees in Indianapolis, IN may work from the company headquarters. Visa sponsorship and relocation assistance are not available.

Salary: $114,800–$191,400 per year, plus possible discretionary bonus.

Company

hirify.global provides a giving platform and support services that help nonprofits raise, recruit, and retain more donors.

What you will do

• Design, build, test, and ship payment features and integrations across processor APIs, webhooks, and donor-facing UI.
• Partner with product, design, and support to understand nonprofit and donor problems before building solutions.
• Use agentic AI tools throughout delivery and develop harnesses, guardrails, and conventions for architecture-aligned code.
• Keep payment flows secure, reliable, and observable; debug production issues to root cause and improve legacy code incrementally.
• Review code, pair with teammates, share knowledge, and represent payments in cross-team work.

Requirements

• Hands-on senior-level experience shipping and supporting a live production application.
• Hands-on experience taking AI-assisted or AI-driven work to production in large, established codebases, beyond prompt writing.
• Architectural understanding sufficient to codify system requirements into AI harnesses, instructions, and reviews.
• Deep software architecture knowledge, including object-oriented design, distributed systems, event-driven architecture, asynchronous programming, relational databases, ORMs, automated testing, and modern frontend/component architecture including micro-frontends.
• Experience with modern payment processing at scale, including asynchronous webhook confirmation, processor rate limits, queuing, retries, traffic spikes, and failure modes.
• Experience with Stripe, PayPal, or similar payment processors.
• Working knowledge of modern security practices for web and payment systems and the ability to identify brittle or insecure designs before release.
• The stack includes .NET/C#, TypeScript/Node, React, and SQL; strong experience in similar ecosystems is accepted.
• Ability to work effectively in a close, highly communicative team with daily communication and quick problem-solving calls.

Culture & Benefits

• Mission-driven culture based on Simplify, Care, and Act.
• Health, vision, and dental insurance, plus 24/7 access to HealthiestYou healthcare services.
• 20 PTO days, 3 flex days, 4 optional volunteer days, 12 paid holidays, and paid parental leave.
• 401k match and equipment shipped to the employee.
• Fully remote work within the stated U.S. and select Canadian Provinces location limits.