Senior Software Engineer, Trust & Safety

Givebutter is a nonprofit fundraising and CRM platform that empowers changemakers to raise more and give better. They are seeking a Senior Software Engineer to build and evolve systems for fraud detection, risk decisioning, and abuse prevention, collaborating closely with various teams to tackle risk challenges.

Responsibilities:

• Build the fraud platform. Design and implement fraud detection and risk decisioning systems, rule engines, scoring pipelines, and event-driven risk signals
• Build for operators. Create investigation and review tooling that helps our Trust & Safety operations team triage, investigate, and resolve cases efficiently. You care as much about internal UX as external
• Help shape what we build next. You'll work closely with your manager, product, and operations stakeholders to identify where we're exposed, propose solutions, and help prioritize the roadmap. Your domain expertise matters here — we want your perspective on what we should be doing
• Think like an adversary. Develop a deep understanding of fraud vectors in the fundraising and payments space: stolen cards, synthetic identities, friendly fraud, campaign abuse, and help us build systems that adapt as threats evolve
• Strengthen payment integrity. Work across our payment systems to harden the transaction lifecycle against abuse. You don't need to be a payments expert on day one
• Mentor those around you. Help everyone on your team develop Trust & Safety domain expertise. Share what you already know, what you’ve learned, and help unblock teammates through thoughtful code reviews

Requirements:

• 6+ years of software engineering experience, with experience in fraud, trust & safety, risk, abuse prevention, or adjacent domains
• Experience building fraud detection or risk decisioning systems — rule engines, scoring systems, policy frameworks, or investigation platforms
• Strong backend engineering fundamentals. You can design scalable, event-driven systems and reason about distributed architecture tradeoffs. You've debugged production issues across multiple layers of the stack
• Stakeholder partnership. You partner closely with end-users and cross-functional stakeholders to discover problems, validate solutions, and iterate based on feedback. You communicate clearly, ask good questions, and help turn ambiguous needs into shippable work
• Good judgment and prioritization. You can take a vague problem like 'our dispute rate is climbing' and work with your team to break it down into a concrete plan with clear next steps
• Experience with PHP/Laravel, or a similar MVC framework like Ruby on Rails, Django, etc. Laravel experience is a plus, but strong fundamentals in any comparable framework translate well
• Experience leading a project or feature area end-to-end
• Experience with React/TypeScript on the frontend
• Familiarity with Stripe's APIs, payments, disputes, Radar, or similar payment processor integrations
• Experience building tools for operations or support teams (internal tooling, case management, review queues)
• Background in fundraising, nonprofit tech, or marketplace platforms where T&S challenges involve campaign legitimacy, donor protection, or platform abuse
• Exposure to event-driven architectures (CDC, Kafka, event sourcing) for real-time risk signal processing
• Experience working in AWS (EKS/Kubernetes, RDS, etc.)