Senior Developer- C# | Cloud-Native SaaS | GalwayGalway, Ireland (Hybrid/On-Site 2 days per week)Build Scalable Tech with a PurposeWe are a leading technology company with a vibrant R&D centre in Galway, building a next-generation, cloud-native SaaS platform. Our products support a global community of purpose-driven organizations, helping them grow, manage operations, and engage their members.Join our collaborative team and be a key player in developing the core eCommerce and payment capabilities that make this mission possible.The Role: Senior DeveloperAs a Senior Developer, you'll design, build, and scale the core services that power our platform. You'll work with modern cloud technologies to solve complex challenges in billing, security, and third-party integration.What You'll Do:Design and develop scalable eCommerce services within our Azure/AWS environments.Build robust APIs, billing integrations (e.g., Maxio, Chargebee), and identity services.Integrate with third-party systems, ensuring secure and high-performance data exchange.Optimize applications for maximum speed, scalability, and reliability.Collaborate with product managers and architects in a full Agile/Scrum lifecycle.Champion best practices in code quality, security, and DevOps.What You Bring:6+ years of software development experience, with a strong focus on cloud-based services.Hands-on experience with Azure and/or AWS.Expertise in C# and JavaScript.Proven track record with RESTful APIs and integrating third-party systems.Experience with billing platforms (e.g., Maxio, Chargebee, Togal) is a significant advantage.Familiarity with microservices, event-driven architecture, and CI/CD pipelines.A collaborative mindset, excellent problem-solving skills, and a drive to build great products.