Jack Wannan

• Bilingual coaching platform

  Built and released it on my own, with role-based access, passwordless and Google sign-in, Stripe payments and email through Resend. Engineered asynchronous coaching-report generation on Azure OpenAI, with validated output, retries, transactional storage and recovery of stalled reports. Added versioned prompt administration and Playwright tests for permissions, webhooks and conflicting edits.

  Next.js, PostgreSQL, Drizzle, Azure OpenAI, Stripe, Resend, Playwright

• Email ticketing for condo-management software

  Improved how an existing app turns emails into tickets, using durable queues and message and conversation locks, then added closed-thread filing, ticket reopening and regression tests.

  Azure Service Bus, Express, SQL Server

• Physiotherapy app for iOS and Android

  Modernised and released the app, integrating MediaPipe through native Swift and Kotlin modules to measure joint angles, range of motion and normalised walking sway.

  React Native, Expo, MediaPipe, Swift, Kotlin

• Maintenance requests for a property manager

  Automation I built and released on my own. It creates service requests, asks tenants follow-up questions and sends troubleshooting instructions.

  n8n, Gmail

• Social publishing for Zentia

  Production workflows covering voice-note transcription, news deduplication, drafting in each brand’s voice and publishing once a post is approved.

  n8n, Airtable, Buffer

Designed and validated enterprise benchmarks for agentic tool use, testing LLM function calling and multi-step reasoning. Reviewed each task for solvability, ambiguity and hallucination risk.

Evaluated and debugged LLM-generated Rust, Python and TypeScript for correctness, efficiency and security, and automated evaluation environment setup with Bash.

• Survey and rewards platformDec 2022 – Mar 2023

  My own product, with user-to-user recommendations, SQL-backed balances, provider callbacks, reversal handling and live notifications. It reached 20,000+ users in one month, with a 4× return on ad spend.

  React, TypeScript, SQL, Socket.IO

• Computer vision for CAPTCHA automation

  A Rust system I researched and built on my own, with 99% solving accuracy across hundreds of thousands of CAPTCHAs. Async HTTP sessions, browser fingerprints, concurrent downloads, perceptual hashing and tests, plus a web app for account management and token usage.

  Rust, Next.js, React, Express, Redis