TypeScript build failing in CI.Unblocked this session.

PM assigned in 10 minutes. TypeScript specialist starts resolving within the hour. TypeScript build failures in CI commonly stem from: strict mode enabled in tsconfig that was not enforced locally, breaking changes in a type package upgrade (e.g. @types/node, @types/react) that added non-optional properties, path alias resolution differences between tsc and the bundler, or composite project references out of sync in a monorepo. The engineer reads the full tsc error output, traces the type chain, and resolves errors without suppressing them with any casts. Most builds unblocked within a single 4-hour session.

Yes. PM scopes the migration depth in the first 15 minutes: allowJs with incremental strictness vs. full conversion, module boundaries to tackle first, and which files are safest to convert without breaking runtime behaviour. The engineer starts with utility functions and API layer types (highest ROI), adds Zod schemas at I/O boundaries, and works outward to components. Shared types are extracted to a types package. The migration is done file-by-file with the build staying green throughout.

Yes. Complex generic constraints, conditional types, and mapped types are the hardest TypeScript problems and a core specialisation of our TypeScript engineers. Common patterns: distributive conditional types producing unexpected union members, infer keyword misuse inside nested generics, and variance mismatches in function parameter types. The engineer explains the error in plain English before fixing it, so your team understands the root cause and avoids the same pattern in future.

Yes. TypeScript project references in Turborepo, Nx, or Lerna monorepos break when tsconfig paths are not consistent across packages, when composite: true is missing from a referenced package, or when the build order does not respect package dependency graphs. The engineer audits all tsconfig files, corrects path aliases, and verifies that tsc --build -v resolves all packages in the correct order. The fix is confirmed by a clean build from scratch with no cached artifacts.

Every QuickHire TypeScript engineer passes a live exercise on a broken TypeScript monorepo with strict mode enabled - real environment, time-limited, covering both a complex generic error and a broken project reference. Written assessment covers: type narrowing, discriminated unions, template literal types, declaration merging, and module augmentation. Portfolio review confirms production TypeScript codebases maintained at scale. Only the top 3% of applicants pass all stages.

QuickHire Instant is built for immediate engineering execution - book a vetted developer and dedicated PM in under 10 minutes, pay per session with no contracts. QuickHire Enterprise is for long-term team partnerships: dedicated developers, managed engineering pods, staff augmentation at scale, and enterprise-grade contracts (MSA, NDA, SLA) with a dedicated account manager. Both models use the same vetted talent network. Visit enterprise.quickhire.services to explore Enterprise engagements.