Note: The job is a remote job and is open to candidates in USA. IXOPAY is the enterprise-grade global payment infrastructure platform built for the era of agentic commerce. The Senior Software Engineer will design and build the backend foundation of IXOPAY's next-generation, AI-first payment orchestration platform, collaborating with various teams and mentoring junior engineers.
Responsibilities
- 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 and AI-powered workflows
- Build reliable, observable services that process high-volume payment transactions with performance and resilience in mind
- Collaborate with Product and AI teams to translate business requirements into scalable technical solutions
- Contribute to platform architecture, engineering standards, and technical decision-making
- Mentor junior engineers through code reviews, design discussions, and day-to-day technical guidance
- Continuously improve system performance, security, reliability, and developer experience
Skills
- 5+ years of experience building production backend services
- Strong experience with C# and the .NET ecosystem
- 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
- Experience in payments, FinTech, or other high-volume transaction processing environments
- Experience with Azure services such as App Configuration and Key Vault
- Knowledge of payment routing, PSP integrations, tokenization, or payment orchestration platforms
- Experience building APIs or services that integrate with AI or LLM-based applications
- Familiarity with plugin or adapter architectures and extensible platform design
- Understanding of PCI DSS, credential management, and payment security best practices
- Experience mentoring engineers in an agile development environment
Benefits
- Competitive salary and benefits
- Professional growth and development opportunities
- A collaborative, supportive engineering culture
- The opportunity to shape a modern AI-first platform from the ground up
- Medical, Dental, and Vision Insurance
- Flexible Spending Account (FSA) and Health Savings Account (HSA)
- Employer-paid Life, AD&D, Short-Term Disability, and Long-Term Disability Insurance
- Unlimited Paid Time Off and Paid Holidays
- 401(k) Plan with Employer Match
Company Overview