Sr. Software Engineer (Backend)

IXOPAY • ,

3d • $175,000 - $185,000

About The Position

IXOPAY is seeking a Senior Software Engineer to join their Engineering team. This role will focus on building the backend foundation of IXOPAY's next-generation, AI-first payment orchestration platform. The engineer will design and build services for intelligent payment routing, connector management, token intelligence, and platform configuration. They will work on complex, high-scale systems, collaborate with Product, AI, and Engineering teams, mentor junior engineers, and influence the platform's architecture for global enterprise customers.

Requirements

• 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.

Nice To Haves

• 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.

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.

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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed