Pavago’s client is hiring a Senior Backend Engineer (.NET / AI Systems) to own the entire technical function of an early-stage SaaS platform. This is a hands-on leadership role where you will write production code daily while making architecture, infrastructure, and AI system decisions for a platform operating at scale.

What You'll Do

Design, build, and maintain a .NET 8.0 / C# backend using Clean Architecture and DDD principles.
Own the architecture and codebase across 14+ independently deployed microservices.
Deliver new features, refactor existing systems, and resolve performance bottlenecks.
Design and operate production-grade AI pipelines across multiple LLM providers.
Optimize prompts and workflows for batch processing, personalization, and segmentation at scale.
Manage rate limits, failover strategies, and cost optimization across AI providers.
Manage MySQL, Redis, and MongoDB in production environments.
Oversee bulk writes, caching strategies, event streams, and analytics pipelines.
Ensure data consistency and performance across distributed services.
Own Linux-based infrastructure, CI/CD pipelines, and service deployments.
Implement centralized logging, monitoring, alerting, and uptime tracking.
Proactively identify and mitigate reliability and scalability risks.
Manage 25+ third-party API integrations used in production.
Design retry, fallback, and graceful degradation strategies.
Ensure system stability when external providers fail or degrade.
Lead and mentor a small engineering team through code reviews and architectural guidance.
Set and enforce engineering standards, workflows, and best practices.
Collaborate closely with the founder on product direction and technical strategy.

What We're Looking For

Deep expertise in .NET 8.0, C#, ASP.NET Core, and Entity Framework Core.
Experience with distributed systems and independently deployed services.
Strong production experience with MySQL, Redis, and MongoDB.
Hands-on DevOps experience with Linux servers and CI/CD pipelines.
Experience managing large numbers of third-party API integrations.
Proven experience building and operating AI/LLM systems at scale.
Familiarity with AI-assisted development tools and workflows.
Strong understanding of monitoring, observability, and incident prevention.
Experience leading small engineering teams.
Strong English communication skills.

Technical Stack

.NET 8.0, C#, ASP.NET Core, Entity Framework Core
MySQL, Redis, MongoDB
Linux

Team & Environment

You will lead and mentor a small engineering team and collaborate closely with the founder. We thrive in early-stage startup environments and value balancing fast execution with long-term architectural thinking.