50 essential problems, structured lessons, a step-by-step code visualizer, and timed mock interviews. Master the patterns — not just the answers.
// the system
Random grinding builds false confidence. AlgoForge gives you a structured path from first concept to mock interview pressure — so you are ready when it counts.
14 topics, 68+ focused lessons. Each lesson explains the why before you ever see a problem.
50 essential problems tied to specific patterns. The Code Visualizer steps through your solution line-by-line so you understand it deeply, not just pass the tests.
45-minute mock sessions with 2 real problems, no hints, no solution tab. Simulate the real thing so interview day feels familiar.
Step through your Python solution line-by-line and watch every variable change in real time. Like a debugger built into the problem editor — close the gap between writing code and actually understanding it.
Try it free →// curriculum
Hash maps, sliding window, prefix sums, two pointers
Fast & slow pointers, reversal, cycle detection
Search space reduction, rotated arrays, boundaries
BFS, DFS, topological sort, shortest paths
Kth largest, merge k sorted, greedy scheduling
Memoization, tabulation, knapsack, LCS, intervals
Permutations, subsets, constraint satisfaction
XOR tricks, counting bits, masking, bit DP
Variable & fixed windows, max sum, longest substring
// built for the interview
Solving problems randomly builds false confidence. Here is what actually goes wrong — and how AlgoForge fixes each one.
You don't know where to start or what to study next.
14 topics sequenced by dependency. Complete the lesson first, then tackle problems in context — never solving blind.
View the curriculum →You pass the test cases but don't understand what your code does.
Step through your solution line-by-line and watch every variable update. Close the gap between writing code and understanding it.
Try it on a problem →You freeze when asked to talk through your approach.
Every problem is tied to a specific concept. Learn the pattern in the lesson, then apply it immediately — so you can always explain your reasoning.
Browse problems →Interview day arrives and you have no idea if you're ready.
Set your target date and company. AlgoForge surfaces the highest-ROI topics for the time you have left.
Set your target date →You can't reproduce solutions under timed pressure.
45-minute sessions, 2 real problems, no hints, no solution tab. The discomfort is intentional — it makes the real interview feel familiar.
Run a mock interview →You grind alone and lose motivation after two weeks.
A fresh problem every day to keep momentum. Short enough to stay consistent, curated to reinforce the patterns that matter most.
See today's challenge →// stay sharp
One email a week — problem walkthroughs, pattern breakdowns, and tips from engineers who landed offers. No spam, unsubscribe any time.