// selected work
Projects
Production systems across three tracks — quantitative trading, Python & ML, and full-stack web. Filter by track below.
Algorithmic Options Trading Engine
An end-to-end intraday engine for NSE index options (Nifty / BankNifty). A single code path replays 3 years of per-minute option-chain data or streams live via the Fyers broker API, with 8 strategies, GEX/max-pain features, and a statistical-validation layer that gates real edge from overfit noise. Independent project; figures are backtested and validated.
Broker-API Trading Service (Fyers)
A Python service built for an algorithmic-trading client to run live orders through the Fyers broker API. Included indicator calculations and a critical execution-bug fix that corrected order behaviour in live conditions.
Food Weasel — NLP Ordering
A natural-language food-ordering app that parses free-text orders — "large cheese pizza, extra pepperoni, no onions" — into structured items. Handled the menus of 7,000+ US restaurants at roughly 86% parsing accuracy.
OCR & Watermark Removal
A document pipeline that removes watermarks and extracts structured key/value text from images and PDFs, combining Tesseract, OpenCV, and Google Vision to handle noisy real-world scans.
Teneno — Private Network Overlay
A VPN-style application that establishes a private network overlay across a user's own devices — systems and networking software connecting machines into one secure virtual network.
Data Crawlers & Server Automation
A body of infrastructure work: data-crawling pipelines, Python↔PHP script conversions, and Linux server monitoring/automation — including load-balancer and DNS health dashboards.
NationalGunTrader
A high-volume OpenCart storefront serving 200,000+ products. The work centred on performance at scale — Redis caching layers and targeted database tuning to keep catalog browsing and search fast under heavy load.
CaseEZ — Case Management SaaS
A patient case-management SaaS that centralises workflows for social workers and case managers. Built on CodeIgniter and MySQL with Stripe for subscriptions and payments.
VacationFinder
A property listing & booking platform that aggregates listings and broker profiles from multiple external APIs, with direct broker onboarding and an admin dashboard. Built on Laravel, MySQL, and Stripe.
davidmolnar.com
An online photography-course marketplace where users buy and stream courses. Built on WordPress with a Vue.js front-end layer and Redis caching for performance.
Microcater
A WordPress storefront for selling laboratory equipment, with catalog and commerce tailored to a specialised B2B product range.
GlobalAutoSolutions
A custom CodeIgniter website and e-commerce store for an auto-parts business — catalog, body-kit browsing, and an online shop.
Expedition2India
A custom PHP website for a travel operator — tour content, itineraries, and enquiry flows.