Selected Work
Recent, Relevant Work
Case studies spanning applied AI, backend systems, platform operations, smartcard security, and IoT products.
Bahasa Indonesia voice-screening prototype with bounded interviews, evidence-backed AI scoring, and required recruiter sign-off.
AI Python Backend Product
What I did
- Designed a deterministic interview state machine that keeps AI-led screening bounded, repeatable, and auditable.
- Separated the conversational interviewer from the scorer so candidate interaction and final evaluation have distinct responsibilities.
Java-based ePassport emulator implementing ICAO 9303 core protocols for issuance and verification flows.
Backend Java Security Research
What I did
- Implemented dynamic personalization for EF.COM, DG1, DG2, DG3, DG4, DG15, and SOD.
- Built host-side BAC and secure messaging tooling for issuance and verification workflows.
Single-VM enterprise Linux lab covering repeatable deployment, service operations, hardening, maintenance, and reporting.
DevOps Operations Backend Security
What I did
- Automated a RHEL-like service stack with modular Ansible roles and Podman containers managed through systemd.
- Applied firewalld policy, SELinux-aware operations, restricted database exposure, and repeatable validation checks.
IoT-based restroom monitoring system with a secure server subsystem for telemetry ingest, real-time dashboarding, audit history, and Telegram-based operational response.
IoT Backend Realtime Systems Operations
What I did
- Built the server subsystem that receives ESP32 telemetry over HTTPS, validates payloads, and normalizes raw sensor data into operator-friendly status.
- Separated storage into snapshot + history tables so the dashboard stays fast while preserving audit trails, CSV export, and scheduled reports.
Full-text search engine using BM25 and inverted indexes, exposed as both library and HTTP service.
Backend Go Research Product
What I did
- Designed ranked retrieval with BM25 over segment-based inverted indexes.
- Exposed indexing, search, and admin endpoints for standalone or embedded use.