Case studies
Each one covers the context, the problem, my responsibility, the decisions made, and the results. Company and client details are kept confidential.
Healthcare SaaS (orthopedic & surgical care)
Automating the surgical patient journey across hospitals with different EHRs: journey automation, FHIR-based integration, tenant-safe background jobs, and guarded LLM features.
EdTech / SaaS
A booking engine with 36 passing tests that never executed its core guarantee. Audited, made concurrency-safe with Postgres-backed tests, and rebuilt the parent flow.
EdTech / SaaS
The code assumed subscriptions; the business ran on prepaid hours. Remodelled booking around an hours balance so granted credits could actually be spent.
EdTech / SaaS
Tutor pay was computed three different ways and the browser did its own maths. Collapsed it into one server-side seam and built a single finance hub.
EdTech / SaaS
Readable, org-scoped IDs for every person (STU-00001, TUT-…) that staff can dictate over the phone, without turning them into a data-harvesting tool.
EdTech / SaaS
An audit of every email, push, and in-app notification found 49 issues, including a link-poisoning vulnerability. Fixed them, built a real notification centre, and let users reply to messages without logging in.
EdTech / SaaS
One dashboard route took 11 seconds to open and the hosting bill was out of line with traffic. Measured first, then cut both.
From architecture to production support, I take features from requirements to running software.