SHL-Style Assessment Practice Web App Development
Ezeudu Kingsley
SHL-Style Assessment Practice Web App
A full-featured Next.js assessment platform built to help candidates prepare for SHL-style pre-employment tests through realistic timed simulations, interactive question formats, and performance analytics.
Project Type: Freelance / Product Development
Tech Stack:
Next.js
React
TypeScript
Tailwind
Overview
This browser-based platform replicates real assessment pressure and pacing.
It includes two core modules:
Numerical Reasoning Simulator
Process Monitoring Simulation
The reason behind just these two excluding assessments like Verbal or Deducive was because, that was what I was preparing for them, so I coded what I actually used.
Users can configure sessions (difficulty, categories, timer, format), complete timed exams, and review detailed analytics with explanations.
Live Demo - Project
Key Features
Numerical Reasoning Engine
An interactive pie chat question
A Table Question
Configurable sessions (difficulty, question count, categories)
Practice mode (instant feedback) & exam mode (timed + review)
Standard formats: MCQ, tables, numeric input
Interactive formats: charts, ranking, drag-and-drop
Question navigator + progress tracking
Tolerance-based scoring for numeric answers
Results & Analytics
Assessment result
Answer Review
Score summary (percentage, grade, time taken)
Category performance breakdown
Bar & pie chart analytics
Expandable review with full explanations
Process Monitoring Simulation
Stable State in Process Monitoring
Unstable State
A real-time decision-making module where users:
Monitor pressure, temperature, flow, and tank levels
Respond to injected faults and escalating alarms
Apply diagnostic and corrective actions
Get scored on stability, response time, and system recovery
Built with modular simulation engines and structured state management.
Technical Highlights
Typed question model supporting multiple formats
Centralized question renderer for scalability
Modular simulation logic (fault, alarm, diagnostic engines)
Zustand for persistent exam & runtime state
Recharts for analytics dashboard
dnd-kit for interactive question handling
Deliverables
Fully responsive assessment web app
Numerical reasoning engine with interactive questions
Timed exam system with analytics dashboard
Real-time process monitoring simulation
Modular, extensible architecture
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Posted Feb 23, 2026
Developed an SHL-style assessment platform using Next.js, React, and TypeScript.
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