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Circuit

Staff Backend Engineer

Circuit • US
Go
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About Circuit
Circuit is building the world’s first company-centric knowledge network. Our AI-powered platform turns fragmented information into actionable knowledge that can be securely shared across partners, vendors, and customers. Backed by a senior team and early enterprise traction, we’re moving fast, and we’re looking for a Staff Backend Engineer to help us scale our backend infrastructure as we onboard more customers and expand our agentic capabilities.

The Role
As a Staff Backend Engineer, you’ll play a critical role in shaping and scaling Circuit’s backend systems and infrastructure. You’ll own complex backend services built primarily in Go, with a focus on resilience, scalability, and performance under increasing load. A significant portion of Circuit’s agentic functionality lives in the backend, and you’ll be instrumental in ensuring it can evolve and handle new levels of demand.

Key Responsibilities

  • Lead design, implementation, and scaling of backend infrastructure and services, primarily in Go
  • Ensure backend systems are resilient, observable, and performant under high customer load
  • Drive architectural decisions for long-term scalability and maintainability
  • Contribute significant code to core backend systems, focusing on efficiency, robustness, and developer velocity
  • Establish and promote engineering best practices across the backend team
  • Collaborate closely with product, ML, and frontend teams to deliver high-quality features
  • Mentor and support other engineers, fostering growth and knowledge sharing

    • Experience

  • Proven track record building and operating large-scale backend systems in production
  • Significant expertise in Go, with deep knowledge of performance optimization, concurrency, and distributed systems
  • Experience running services at scale (thousands to millions of requests per second)
  • Strong background in service-oriented architecture, microservices, and API design
  • Proficiency with containerization and orchestration (Docker, Kubernetes)
  • Hands-on experience with observability stacks (Datadog, Prometheus, OpenTelemetry, etc.)
  • Experience with databases (SQL and NoSQL) and designing data-intensive systems
  • Familiarity with infrastructure-as-code and cloud platforms (AWS, GCP, or Azure)
  • Bonus: Exposure to ML workloads, pipelines, or agentic systems in production environments

    • Human Skills

  • Strong problem-solving abilities and adaptability in a fast-paced, dynamic environment
  • Results-oriented and able to balance speed with quality
  • Team-first mindset, collaborative and low-ego
  • Excited to experiment with emerging tools and approaches to accelerate development
  • Passion for building foundational systems that unlock innovation at scale

    • What We Offer

  • Early-Stage Ownership: Join at the ground floor of a company with real traction and momentum.
  • Empowered Culture: We value autonomy, candor, and craft. You'll be trusted to lead.
  • Cutting-Edge Tech: Work with the latest in AI, backend systems, and intelligent infrastructure.
  • Meaningful Impact: Shape a platform that transforms how organizations activate knowledge.
  • Holistic Benefits: Competitive comp, equity, 100% paid healthcare, 401K, flexible PTO, and a team that truly cares.
    • Apply Now