Senior Software Engineer - Platform & Integrations (Backend)

Seismic is an enterprise SaaS organization building cloud platforms and customer-facing product experiences. The Senior Software Engineer will design, build, and operate large-scale distributed systems and services for the Platform and Integrations team, while applying cloud-native and AI-native development practices. The role also involves driving technical design, improving reliability and engineering quality, supporting production services, and mentoring engineers.

Responsibilities:

• Design, develop, and operate enterprise-grade distributed systems and services that are scalable, reliable, secure, and highly available
• Own end-to-end technical design for key services and subsystems, evaluate architectural trade-offs, and drive implementation decisions across backend services, cloud infrastructure, and data platforms
• Build and maintain production services using C#/.NET or other major object-oriented programming languages, web services, and modern API patterns
• Apply AI-native development practices — including LLM-assisted development, retrieval-augmented generation (RAG), and agentic workflows — to accelerate delivery and build intelligent product capabilities
• Collaborate closely with product management, design, and distributed engineering teams to translate business needs into technical solutions from concept through launch
• Improve engineering quality through Test-Driven Development (TDD), Domain-Driven Design (DDD), automated testing, observability, and operational excellence
• Identify and drive improvements to system reliability, performance, scalability, and developer experience across the platform
• Participate in on-call support rotations and incident response to ensure service reliability, availability, and timely resolution of production issues
• Mentor engineers, participate in design and code reviews, and help raise the technical bar across globally distributed teams

Requirements:

• Extensive experience designing and operating enterprise-grade SaaS systems, distributed services, and cloud operational infrastructure for scalability, reliability, security, and high availability
• 5+ years of experience with C# and .NET, or another major object-oriented programming language, and web services
• 3+ years of experience with PostgreSQL or major RDBMS, including performance tuning, maintenance, schema design, and operational best practices
• Proficiency with Test-Driven Development (TDD), Domain-Driven Design (DDD), API testing, and modern engineering quality practices
• Experience with event-driven architectures using technologies such as Kafka or RabbitMQ, and in-memory data stores such as Redis
• Hands-on experience with container technologies and cloud-native platforms such as Docker, Kubernetes, Istio, etcd, and service mesh architectures
• Experience with AWS, GCP, or Azure, including deploying and operating containerized workloads on Kubernetes in production
• Familiarity with CI/CD pipelines, Infrastructure as Code, and tools such as Terraform or Pulumi
• Experience mentoring engineers, leading design reviews, and influencing technical direction across teams
• Proven ability to collaborate effectively with product, design, engineering, and globally distributed teams
• Experience working in a fast-paced, dynamic environment, preferably in a SaaS or technology-driven company
• Experience with AI-native development tools and platforms such as Claude, GitHub Copilot, Agentforce, or similar tools
• Hands-on experience with LLMs, RAG, model integration patterns, AI-assisted workflows, or intelligent product features
• Experience with observability, analytics, automation, or data platforms such as New Relic, Snowflake, Ansible, or Python
• Experience with major CRM ecosystems such as Salesforce or Microsoft Dynamics
• Bachelor's or Master's degree in Computer Science, Engineering, or a related field, or equivalent practical experience