08 · PLANNR
A structured roadmap from zero to LLD interview-ready.
Plannr sequences every topic, problem set, and milestone you need — so your prep has direction, not just volume.
OOP Foundations
DONEClasses, Interfaces, Polymorphism
Design Patterns
DONEAll 23 GoF patterns
SOLID Principles
IN PROGRESSSRP, OCP, LSP, ISP, DIP
Full Problem Sets
UPCOMINGParking Lot, Ride-Hailing…
Three steps from open to interview-ready.
No guesswork. No wasted sessions. Just a clear path forward.
Set your goal
Tell Plannr your target role — SDE-1, SDE-2, or Senior — to configure roadmap depth and timeline. Your interview date anchors the whole plan.
Follow your roadmap
Work through topics and curated problem sets in recommended sequence. Each section builds on the previous — nothing is skipped, nothing is repeated unnecessarily.
Track your milestones
A progress dashboard shows which topics you have covered, which problem sets are complete, and which milestones remain. You always know exactly where you stand.
Calibrated for your target.
Pick your level. Plannr sets the depth, the timeline, and the problem load.
Foundations first.
Patterns & SOLID emphasis. Lighter problem load focused on core interview scenarios.
The full curriculum.
Complete roadmap, full problem bank, and milestone tracking across every module.
Advanced trade-offs.
Extended problem sets with Evolution mode. Architectural depth, constraint reasoning, and open-ended design.
Everything built into the path.
Six capabilities that make Plannr more than a checklist.
Structured topic sequence
Topics ordered the way they should be learned — OOP foundations before patterns, patterns before full problem sets.
Curated problem sets
Each topic section includes hand-picked problems from real LLD interview banks. No random sourcing.
Milestone tracking
Named milestones mark progress checkpoints — finishing SOLID, completing pattern sections, clearing your first mock.
Difficulty progression
Problems are sequenced from foundational to senior-level. The curve is deliberate — you never jump too far ahead.
Preparation timeline
Plannr estimates how many weeks your target depth will take at a given daily time commitment.
Gap analysis
Already know some LLD? Mark topics as done and Plannr surfaces only what you have not yet covered.
Built for engineers who need a plan, not just resources.
If any of these sound like you, Plannr is the answer.
Engineers starting LLD prep from scratch with no structured plan to follow.
SDE-1s targeting product companies like Amazon, Flipkart, or Uber where LLD is a deciding round.
Engineers who have watched YouTube videos and read blog posts but still feel unready — because they never had a sequence.
Anyone who wants a roadmap with an end-state, not an endless list of "resources."
FAQ
Questions people ask
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