Senior Software Engineer, Backend
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.
About the job
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
Skills
C#, .Net, REST APIs, Event-Driven Apis, Relational Databases, Distributed Systems, Cloud Applications, Payments, Fintech
Similar jobs
Backend Engineering jobs
Okta
Toronto, Canada
Senior software engineer designing and scaling secure server-side services for Okta’s device identity platform. The role requires strong Java and Spring expertise, database and API design experience, and the ability to mentor engineers while driving scalable, secure development practices.
Coinbase
United States
Build and operate high-throughput blockchain infrastructure, APIs, and platform primitives integrating protocols such as Ethereum and Bitcoin with internal services. Requires 5+ years of software engineering experience, distributed-systems expertise, and hands-on crypto infrastructure experience.
Cloudflare
Atlanta, GADesign, build, and operate Cloudflare’s globally distributed cache and reverse-proxy data plane, improving performance, correctness, and resilience across the edge. Requires at least 4 years of production systems experience and proficiency in a systems or backend language.
Hinge Health
San Francisco, CA
Senior backend engineer designing and operating reliable billing and financial systems, APIs, data models, and distributed workflows. The role requires 5+ years of professional software development experience, strong backend expertise, and collaboration across Product, Finance, Operations, and Data.
Cloudflare
Lisbon, Portugal
Senior software engineer building and operating large-scale egress connectivity infrastructure using Go or Rust. The role requires networking expertise, distributed-systems experience, strong debugging skills, and participation in production on-call operations.