Senior Software Engineer, Backend

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Payabli

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2020

💳 Fintech

☁️ SaaS

🤝 B2B

💰 $36M Series B - Payabli on 2025-06

Fintech • SaaS • B2B

Payabli is a next-generation payments infrastructure company that enables software platforms to embed, manage, and monetize payments. It offers a full suite of capabilities — Pay In (payment acceptance and merchant onboarding), Pay Out (payables and payouts to vendors/partners), and Pay Ops (operations, risk, billing, and reporting) — delivered via APIs, embeddable components, and white-glove advisory services. Payabli targets SaaS companies, financial institutions, tech-enabled services, and enterprise merchants, and is a registered payment facilitator/ISO offering compliant, scalable payments solutions and developer-friendly integration tools.

📋 Description

• Design, build, and maintain scalable backend services using C# and .NET. • Develop the core infrastructure that powers payment routing, connector management, and platform configuration. • Design secure, extensible APIs that support both customer-facing applications, direct integrations and AI-powered workflows. • Build reliable, observable services that process high-volume payment transactions with performance and resilience in mind. • Contribute to platform architecture, engineering standards, and technical decision-making. • Continuously improve system performance, security, reliability, and developer experience. • Collaborate closely with other service owning teams to integrate via APIs and real-time data streams, ensuring seamless data flow across the stack & overall platform. • Raise the bar: Lead code reviews, champion backend standards, and drive architectural decisions that keep the codebase healthy as we scale. • Multiply the team: Mentor engineers around you and elevate backend engineering quality across the organization through pairing, documentation and leading by example. • Own the full lifecycle: Work across requirements, implementation, testing, and deployment. We don't throw things over the wall here. • Sweat the details: Optimize for performance, accessibility, and cross-browser compatibility.

🎯 Requirements

• 5+ years of experience building production backend services. • Strong experience with C# and the .NET ecosystem. • Strong experience in Payments, FinTech, or other high-volume transaction processing environments. • Experience designing and building RESTful and/or event-driven APIs. • Strong understanding of relational databases, data modelling, and distributed systems. • Experience building secure, scalable cloud-based applications. • Excellent problem-solving, communication, and collaboration skills. • Ability to provide technical leadership while remaining hands-on in development.

🏖️ Benefits

• Competitive salary • Stock options with the potential to unlock more equity as we grow • Flexible PTO and paid parental leave • Medical, dental, & vision insurance • 401K, HSA, pre-tax savings programs