senior loop
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Pick a plan below — both unlock the full catalog, including this item.

No auto-renewal · Pay manually

Pay for the months
you're prepping.

Most senior loops are over in 8–12 weeks. Pay then, stop when you're done.

Senior Loop₹1,499/mo
₹ INR$ USD
Monthly
₹1,499
/ month

For active prep cycles. No auto-renewal.

  • ✓Unlock the full catalog for 30 days
  • ✓Senior-tier AI grading on every review
  • ✓Multi-language exercises where available
  • ✓Scores and attempt history saved forever
  • ✓Stop paying when you're done prepping
RECOMMENDED
Quarterly
₹3,999
/ quarter
₹4,497Save ₹498 · 11% off

Covers most senior prep cycles end to end.

  • ✓Unlock the full catalog for 90 days
  • ✓Everything in Monthly
  • ✓Get every new exercise and deep dive added during your quarter

48-hour full refund if you've completed fewer than 3 graded exercises · full policy

No auto-renewal

Pay manually each cycle. No silent charges, no cancellation maze when you land the offer.

48-hour refund

Full refund if you request within 48 hours and have finished fewer than 3 graded exercises. No questions asked.

5 languages

Most exercises support Go, Kotlin, Python, Java, and C#; each card shows the languages currently available.

01—What's in the catalog

Exactly what's live right now.

No vague promises. Here's the specific content your subscription unlocks.

Code Review
3 free12 paid
15 PRs

Hand-authored PRs across payments, distributed systems, API design, security, and performance. AI-graded against a senior-engineer rubric.

Bug Hunt
3 free7 paid
10 exercises

Broken codebases, failing tests, real log excerpts. Find the root cause, fix it, compare against the canonical solution.

Build It
1st problem free
1 problems

Same problem, escalating constraints across 4 stages. Stage 3 is the senior filter — prove correctness with a conservation invariant.

Deep Dives
3 free10 pro
13 topics

Kafka, idempotency, Raft, distributed locks, rate limiting, consistent hashing — the tradeoffs and failure modes that surface-level guides skip.

03—Not ready to commit?

Start free. No card required.

3 code reviews, 3 debug exercises, and 3 Deep Dives — free, no commitment.

Start free →Read the Deep Dives first →

Questions worth answering honestly.

Try the free exercises first. If you buy a plan and want out, request a refund within 48 hours and before completing 3 graded exercise submissions — we refund the full amount. Full terms are on the Cancellation & Refund Policy page.

Broad course platforms teach many topics. Senior Loop focuses narrowly on hands-on senior backend practice: code review, production debugging, low-level design, and technical tradeoffs, with feedback against explicit answer keys.

Each PR has a hand-authored bug list with severity and category. Claude AI compares your inline comments to that ground truth — so the score reflects what was planted, not what an LLM happens to invent that day.

Your submissions and scores stay available. Only paid catalog items re-lock until you purchase access again; free items remain free.

Yes. New catalog items are included while your access is active: 90 days on Quarterly or 30 days on Monthly.

Not yet. Reach out if you want to sponsor 5+ engineers — happy to do a private invoice for now and build the team plan once there's demand.