Pick or Paste a Problem
Choose from our curated catalog across difficulty levels, or paste your own challenge — LeetCode, school assignment, or real-world project. The AI validates and normalizes it instantly.
The Method
HOW IT WORKS
Three steps. One loop. Every problem becomes a permanent skill.
Understand→Decompose→Pseudocode→Code→Pattern
Work Through The Locked Flow
Every problem follows the same guided path. First understand it, then decompose it, then write pseudocode before coding, testing, and extracting the pattern. You cannot skip ahead, and the AI mentor stays inside the current step.
UnderstandDecomposePseudocodeCodeTestPattern
Extract and Own the Pattern
After passing all tests, the AI extracts a reusable pattern — rationale, template code, where to apply it, what breaks it — and saves it permanently to your Pattern Library.
Language TracksPICK YOUR
PICK YOUR
LANGUAGE
Start with a curated track or paste your own problem. Every language uses the same six-phase locked methodology.
All tracks follow the same six-phase locked methodology. Choose your language and start learning.
ENGINEERFLOW v1.0STRUCTURED
STRUCTURED
PRECISION
Every exercise is phase-locked. You can't skip steps. The AI mentor guides you without giving away answers. You build a pattern library as you solve real problems.
CONCEPT ISOLATION
AI identifies the core engineering principle behind the problem instantly.
STRUCTURAL DELIVERANCE
Complex tasks are broken down into bite-sized, manageable explanations.
PHASE-LOCKED SOLVING
Minimal syntax requirement. Solve only what is necessary for the current step.
PATTERN EXTRACTION
Transform solutions into reusable mental models and architectural templates.
Pseudocode Ready
Safe to implement
Phase 3 • Ready
Live WorkflowPHASE-LOCKED
PHASE-LOCKED
LEARNING
Watch how EngineerFlow guides you through each phase. You can't skip ahead. Understanding comes first, then decomposition, then pseudocode. No answers given, only guidance.
Understand
Restate the task clearly
Decompose
Break it into sub-problems
Pseudocode
Write logic before syntax
AI Guidance
Hints, not answers
Code & Test
Write and run
Pattern Extracted
Build your library
EngineerFlow v1.0
Phase 1
Understand
We need the first number that appears once, while keeping the original order intact.
Progress17%
How ThinkerDev Works
Bring any coding problem. ThinkerDev breaks it down, tests your understanding, and helps you extract reusable patterns—not just solutions.
IMPORT
IMPORT
Start with any problem from LeetCode, HackerRank, school assignments, or real projects. ThinkerDev normalizes the input and prepares it for phase-locked learning.
[ LOADING_TASK_SOURCE: hacker_rank_v2 ]
NORMALIZE
NORMALIZE
The system isolates the core concept, generates automatic tests, and structures the problem into phases. You work through each step with progressive AI guidance.
PHASE LOCKED
AUTO-PHASED
EXTRACT
EXTRACT
After you pass all tests, the AI extracts a pattern: the rationale, template code, where to use it, and common pitfalls. This goes into your personal pattern library.
NEW PATTERN: HASH_RELATION_V12