hardScenarioDesignSeniorStaff
How do you design the dependency graph, handle shared resources, and optimise build times when breaking down a massive iOS monolithic application into a modular architecture using Tuist?
Assess the candidate's ability to migrate a large-scale iOS application to a modular architecture using Tuist, managing dependency graphs, enforcing architectural boundaries, and optimising build times. Use this MOBILE answer to show the decision, trade-off, and evidence rather than a memorised definition.
3 min readUpdated 2026-08-15
Answer
Short answer
Modularising an iOS monolith with Tuist starts by extracting vertical feature targets, defining one-way dependency rules, isolating resources, and using project generation plus caching to reduce build times without recreating the monolith as tangled frameworks.
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Likely follow-ups
- How do you prevent two feature modules from silently coupling to each other's internals over time?
- What is your rollback plan if a module boundary you defined turns out to be wrong six months into the migration?
- How do you keep Tuist's generated project in sync with a large team making frequent structural changes without constant merge conflicts?
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