# Senior Software Engineer, Backend

**Company:** [Payabli](https://hotfix.jobs/companies/payabli)
**Location:** Remote
**Role:** Backend Engineering
**Experience:** 5+ years
**Skills:** C#, .Net, REST APIs, Event-Driven Apis, Relational Databases, Distributed Systems, Cloud Applications, Payments, Fintech
**Posted:** 2026-07-14

> Senior backend engineer building scalable C#/.NET services for payment routing, connector management, and high-volume transaction processing in a fintech payments infrastructure platform. Requires 5+ years production backend experience, strong payments/fintech background, and technical leadership skills.

## Job Description

## What you will Do
- 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.
- Lead code reviews, champion backend standards, and drive architectural decisions that keep the codebase healthy as we scale.
- Mentor engineers around you and elevate backend engineering quality across the organization through pairing, documentation and leading by example.
- Work across requirements, implementation, testing, and deployment.

## What we are looking for
- 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.

## What we can offer you
- 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

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**Canonical:** https://hotfix.jobs/jobs/d19a9ae5-b1cd-40fe-afff-6dcc58bb0c2d