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Reading / 2026-05/2026-05-19t110000-building-ci-with-lambda-durable-functions

Building CI with Lambda durable functions

Depot CI's orchestrator uses AWS Lambda durable functions to run a stateful, checkpointed CI workflow scheduler without keeping a long-lived process alive, using a two-layer Run/Workflow Lambda hierarchy and callback-driven job coordination.

May 19, 2026 · tech · Iris Scholten, Depot

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Topics

  • continuous-integration
  • distributed-systems
  • software-architecture
  • developer-tools
  • production-systems

Cited by

  • Continuous integration

    CI pipelines face compounding pressures from scale, flaky tests, merge queue correctness, supply chain attacks, and AI-generated code — each demanding stricter architecture at the point where code enters the main branch.

  • Developer tools

    Discrete software tools that extend what practitioners can build, debug, deploy, or understand, spanning LLM fine-tuning, CI orchestration, documentation, security scanning, Kubernetes management, and more.

  • Distributed systems

    Distributed systems problems — coordination, state management, failure recovery, and observability — recur across cloud infrastructure, durable execution, multi-agent AI, and formal verification research.

  • Production systems

    The engineering decisions that determine how software behaves under real load, covering durability, observability, testing discipline, performance constraints, and the operational costs of failure.

  • Software architecture

    Software architecture shapes how systems behave under pressure, how teams reason about codebases, and how much complexity accumulates over time — spanning module design, state management, deployment topology, and the feedback loops that keep all three honest.

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