Work

Four systems, one card each

Ten minutes is enough to judge the fit. Each card names my role, the stack and the result, and links to the live system. The case study adds the problem, the path and the limits.

01 · Career pipeline

Human approval required

JobNet Application

A daily career pipeline that turns public job posts into a ranked shortlist and tailored drafts, and sends a letter only when the posting prints an employer address.

Role: Designed and operated the pipeline
Stack: Agents · Gmail · macOS automation · CV tailoring
Result: 20:00 SAST scrape, sentence ranker, one role per company. A note is sent only when the posting prints an employer address, that mailbox verifies, and the letter cites the role. Otherwise the send is held. The previous run is reported at 15:00 SAST.

Read case study Open JobNet Application

02 · Multimodal assistant

Live, with a labelled fallback

Mercatus Assist & THINK

A C# / ASP.NET Core service and a React workspace that call Gemini from the server, keep the API key off the browser, and say so when the live path is down.

Role: Built the API, the proxy, and the workspace
Stack: C# · ASP.NET Core 8 · React 19 · TypeScript · Gemini · nginx · systemd
Result: Provider-swappable chat completions, exponential backoff on 429 and 5xx, per-IP caps, and a labelled demo mode when the robot is unhealthy.

Read case study Open Mercatus Assist

03 · Research system

Paper research desk

Forex Mercatus Codex

A hosted Python terminal for charts, multi-market views, and a session-scoped paper bot — built so it cannot be mistaken for a brokerage.

Role: Built, hosted, and bounded the desk
Stack: Python · Highcharts · yfinance · Ubuntu VPS
Result: About 87 MB on disk, quotes refreshing near every 60 seconds, up to 24 sessions with a 2-hour idle TTL, and a public health JSON.

Read case study Open the paper desk

04 · Browser studio

Runs in the browser

SoundX AI

An AI drum station and studio with 20 on-device AI tools, a plugin rack, Afro sample packs and 22 themes. Audio stays on the machine. No sign-in.

Role: Built the studio, the on-device AI tools and the Producer Agent
Stack: React · Web Audio · TypeScript · on-device ML
Result: A brief becomes a full beat in one click. Tempo and key detection, hum-to-MIDI, clash-fixing EQ and Mix QA all run in the browser.

Read case study Open SoundX AI

Production evidence

These are the checks a reviewer can do without a private repo. Screens of the live flows are the demos themselves — open them from the cards.

Repositories
No public GitHub profile is listed on the résumé. Ask for a walkthrough of the flagship codebases.
Tests
Automated suites stay with the private source. Public checks are the health JSON, the labelled fallback, and the no-send rule.
Deployment
Ubuntu VPS, systemd for the .NET robot, nginx, Cloudflare in front of the static site, Python desk on port 8790.
Monitoring
Forex publishes health JSON. Assist exposes failure by switching to a labelled demo instead of a silent error.
Security
API keys stay on the VPS. Per-IP caps on THINK. JobNet sends only when a posting prints an address. The paper desk cannot place an order.
Performance
Published numbers only: ~60s quote refresh, 24 sessions / 2h idle, ~87 MB desk, backoff on 429 and 5xx.

Continue to the case studies