Learntrix
💻 Software Engineering & Client-Side Architecture

Learntrix Engineering Portfolio & Case Studies

A transparent look into how we build high-utility, zero-latency, 100% client-side web software. Every tool highlighted below is deployed, fully functional, and running live on production.

01Document Engineering
WebAssembly (WASM)

Client-Side WebAssembly PDF Processing Suite

The Engineering Problem:

Traditional PDF tools upload sensitive contracts, tax records, and medical scans to remote third-party servers, creating data leak risks, latency queues, and daily file caps.

Our Client-Side Solution:

Engineered a 100% in-browser PDF manipulation pipeline using pdf-lib compiled inside client memory. Parses cross-reference (xref) tables, creates isolated document singletons, and exports merged or split PDFs in sub-second cycles without sending a single byte across the internet.

Technologies Deployed:
Next.jspdf-libWebAssemblyTypedArrays (Uint8Array)Blob URL API
0 Bytes Uploaded
<500ms Average Processing
Zero File Retention
Launch Live Tool (Client-Side WebAssembly PDF Processing Suite)→100% Live in Production
02Fintech & Tax Law
Statutory Actuarial Math

Dual-Regime Income Tax Simulation Engine (FY 2025-26)

The Engineering Problem:

Indian taxpayers struggled to evaluate whether the New Tax Regime (Section 115BAC) or Old Regime offered higher savings following the Union Budget changes to standard deduction (₹75,000) and Section 87A rebate limits.

Our Client-Side Solution:

Designed a real-time side-by-side comparison engine that computes marginal tax liability under both regimes simultaneously across Chapter VI-A deductions (80C, 80D, 80CCD, HRA, 24b home loan interest), rendering interactive tax bracket visualizations and CSV assessment exports.

Technologies Deployed:
React 19TypeScriptActuarial Formula EngineSVG Data VisualizationClient-Side CSV Generator
100% Sourced from incometax.gov.in
Instant Side-by-Side Delta
Full Privacy Sandbox
Launch Live Tool (Dual-Regime Income Tax Simulation Engine (FY 2025-26))→100% Live in Production
03Digital Signal Processing
Web Audio API

Web Audio DSP Synthesizer & Pitch Detection Suite

The Engineering Problem:

Musicians and students frequently encounter slow, ad-choked tuner and tone generator apps that require app store installations, background audio recording permissions, and external audio samples.

Our Client-Side Solution:

Constructed an in-browser musical instrument and calibration suite. The guitar tuner runs real-time time-domain autocorrelation on raw microphone streams to detect fundamental frequencies within ±1 cent. The virtual piano and tone generators synthesize pure harmonic overtones using native Web Audio oscillators and custom ADSR gain nodes.

Technologies Deployed:
Web Audio API (AudioContext)Autocorrelation Pitch AlgorithmBiquadFilterNodeMediaDevices.getUserMedia
Zero External Audio CDNs
6 Harmonic Waveforms
Multi-Touch & Keyboard Responsive
Launch Live Tool (Web Audio DSP Synthesizer & Pitch Detection Suite)→100% Live in Production
04Computer Graphics
HTML5 Canvas 2D

Hardware-Accelerated In-Browser Image Studio

The Engineering Problem:

Content creators and web developers need fast image compression, format conversion (WebP/JPEG/PNG), and aspect ratio reframing without watermark traps or subscription paywalls.

Our Client-Side Solution:

Built a local rasterization pipeline using HTML5 Canvas 2D contexts. Decodes source images in browser RAM, applies bicubic dimension capping, and recompresses bitstreams into modern WebP format, achieving 70%–85% file size reduction with zero perceptible visual degradation.

Technologies Deployed:
HTML5 Canvas 2DFileReader APIWebP EncoderObject URL Memory Management
70%–85% Typical Size Reduction
Instant Local Downloads
Zero Upload Wait
Launch Live Tool (Hardware-Accelerated In-Browser Image Studio)→100% Live in Production
05Game Engineering
Deterministic PRNG

Deterministic Daily Wordle Challenge & Arcade Suite

The Engineering Problem:

Fans of daily word puzzles face strict 1-game-per-day locks, aggressive paywalls on puzzle archives, and invasive account creation requirements.

Our Client-Side Solution:

Created an infinite-replay Wordle engine featuring both an Unlimited Mode and a date-seeded deterministic Daily Challenge (Daily #...). Features 5-letter dictionary validation, virtual on-screen keyboard synchronization, streak persistence in localStorage, and viral emoji score-card generation.

Technologies Deployed:
React 19 State MachineDeterministic Mulberry32 PRNGIndexed 5-Letter DictionaryWeb Share API
Unlimited Free Replays
Synchronized Global Daily Word
Persistent Win Streaks
Launch Live Tool (Deterministic Daily Wordle Challenge & Arcade Suite)→100% Live in Production

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