The decisions behind the software.

AI workflow platform cloud migration.

I moved a multi-component document and AI-workflow platform from an environment-specific on-premise setup to reusable Terraform, GKE and a controlled blue/red delivery path on Google Cloud.

Role / contribution

Cloud platform engineering · Platform migration and repeatable release

Key decision

Turn environment variance into a review surface

Archival workflow management.

I built a Spring Boot service and React Single-SPA microfrontend around Camunda so operators could create archival sessions, move source packages through a nine-step lifecycle and track the resulting output.

Role / contribution

Workflow and product engineering · Service, microfrontend and workflow integration

Key decision

Show state before offering action

Retail ERP maintenance and evolution.

I worked through SQL Server, .NET Framework 4.8 and a KnockoutJS frontend in a live retail ERP, covering features, defects, reporting, courier integrations and stock-receipt modernisation.

Role / contribution

Enterprise product engineering · Application, database, reporting and integrations

Key decision

Trace the whole request path

CareerOS Local.

CareerOS Local turns an existing CV into a private, revisioned career record, then uses a required local LLM for matching and coaching. Tauri, FastAPI and SQLite keep facts, drafts, restart recovery and agent access on the user’s device.

Key decision

Create the record before importing the CV

ELIZA Lab.

ELIZA Lab is a Rust machine-learning pipeline for training, calibrating and inspecting an intent classifier locally. It replaces a misleading therapy-bot premise with a reproducible, non-clinical experiment that can abstain.

Key decision

Bound the claim to the synthetic fixture

DIG.

DIG 3.2.0 opens real Gopher resources from a CLI, a local browser workbench and a standalone Android app. Its PWA keeps a verified fixture offline; live browser traffic still goes through the same-origin gateway instead of pretending a static page can open raw TCP sockets.

Key decision

Resolve once, then connect to what was checked

IntegraDraw.

IntegraDraw is a Java desktop and TypeScript Canvas workbench for comparing midpoint and trapezoidal sums with a Simpson reference. Both runtimes share versioned numerical cases and explicit tolerances.

Key decision

Preserve signed area

VECTOR.

VECTOR 3.4.0 is a white-label placement operations system that a school can run on its own infrastructure. Versioned programme rules still drive daily work, while guarded SQLite storage, bounded data paths and release controls make the self-hosted boundary fit for production operations.

Key decision

Version the rules, not only the placement

JDoor Assist.

JDoor began as a 2022 school networking project co-created by Djenis and a collaborator. Djenis later rebuilt its security model, session lifecycle, product UX, tests and release path as JDoor Assist: a visible, view-only-by-default desktop tool for authorized help on trusted local networks.

Key decision

Make approval legible to the host