Lead Engineer - Workflow Builder DSL
Leads the design and ownership of a canonical workflow DSL, including schemas, TypeScript contracts, semantic validation, static analysis, codemods, and testing. The role requires 7+ years of backend experience plus expertise in typed DSLs, APIs, and production reliability.
About the job
Responsibilities
- Define and maintain the canonical syntax and semantics for workflows.
- Own JSON Schemas and TypeScript types for validation, linting, and generation.
- Design contracts for safe workflow creation through public and internal APIs.
- Implement semantic validators using Zod or suitable alternatives.
- Ship linting and codemod tools that enforce structural guardrails and automatically repair common errors.
- Establish unit, integration, and golden tests for workflow creation paths.
- Add static analysis for loops, dangling nodes, and invalid edges.
- Define schema-exchange and validation interfaces with Engine and Snapshot teams.
- Monitor DSL validation services and ensure 99.9% availability and low error rates.
Requirements
- 7+ years building and owning complex backend systems.
- Deep experience with typed DSLs, ASTs, or schema-driven architectures.
- Fluency in TypeScript and validation frameworks such as Zod, Ajv, or JSON Schema.
- Proven experience designing public or versioned APIs.
- Strong testing discipline and a data-integrity mindset.
- Comfort owning production services and reliability metrics.
Nice to Have
- Compiler or graph background.
- Schema evolution experience.
- Developer productivity tooling experience.
Skills
TypeScript, Zod, Ajv, Json Schema, Abstract Syntax Trees, Domain-Specific Languages, Public Apis, Versioned Apis, Static Analysis, Codemods, Graph Algorithms, Testing, Backend Systems, Microservices, Schema Evolution
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