Skills & Expertise

I design and deliver offline-first legal-tech systems (ArcanumLex / TimeVaultSecure) built on Django, with strong privacy-by-design, robust encryption, and hardware-assisted deployments (NUC / NAS, USB licensing, offline updates). I also develop advanced Unix IT administration solutions, encryption-based projects, steganography in images, data compression methods, and a variety of desktop applications such as TVS GUI, TVS CodeStamp, and beyond. Below is a concise snapshot of what I bring to B2B engagements.

Django 5.x / DRF Python 3.11 PostgreSQL Argon2 / crypto GDPR / DPIA Intel NUC / Synology USB licensing Qt / PySide Linux / DevOps Unix IT Administration Data Encryption Steganography Data Compression Desktop Apps

Proficiency

Django / DRF

Python

PostgreSQL

Security & GDPR

Linux / DevOps

Unix IT Administration

Encryption Projects

Steganography

Compression Methods

Qt / PySide

Front-end

Percentages reflect hands-on production experience and delivery confidence.

Backend & Architecture

▸Django Admin customization, object-level permissions, role templates.
▸ORM performance, transactions & locking, robust migrations.
▸API contracts (OpenAPI), semantic versioning, integration tests.

Security & Privacy

▸Argon2 hashing, master keys (MK/CAK), digital signatures, HMAC.
▸LUKS-encrypted storage, audit logs & alerts, tested backup/restore.
▸GDPR by design: minimization, retention policies, DPIA and records.
▸Encryption projects: file security, crypto libraries integration.
▸Steganography: hiding sensitive data in image/media formats.

Offline & Desktop Solutions

▸Intel NUC + local PostgreSQL/SQLite, Synology NAS (RAID).
▸USB license keys (UUID + signatures), offline updates via pendrive.
▸LAN-only operation, hardened access paths, no public cloud reliance.
▸Desktop apps: TVS GUI, CodeStamp, CleanVault, Gold Portfolio Tracker.

Business Delivery

▸Offline licensing models, pragmatic SLAs, clear runbooks.
▸Zero-friction first-run experience, onboarding & training materials.
▸Bilingual PL/DE communication, legal-tech domain familiarity.

Recent Work

▸ArcanumLex — DMS for law firms: Django, PostgreSQL, encryption, offline-first (2025).
▸TimeVaultSecure — timestamp & signatures: USB licensing, PDF certificates, local verification (2025).
▸TVS GUI — desktop Qt app resilient to network loss with local sync (2025).
▸CodeStamp — document timestamp & verification (2025).
▸CleanVault — secure document cleaning & archiving (2025).

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