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hengadev/README.md

Hey, I'm Gary 👋

Backend-first freelance developer based in Paris, building web applications and tools with Go and SvelteKit.

What I do

I turn business problems into software — from booking platforms to case management ecosystems to cryptography libraries. I work across the full stack, but I'm most at home on the server side: designing module boundaries, wiring infrastructure, and getting things into production.

I self-host wherever it makes sense, both for privacy and to keep costs down. AI-augmented development is part of my workflow — I use it to move faster on well-scoped problems, not to replace the judgment behind them.

Projects

Project What it is Stack
Cluo Investigative case management ecosystem — Go API, Wails desktop app, mobile PWA, and client portal. AI transcription pipeline, legal document chain automated as a state machine. Go, SvelteKit, Wails, PostgreSQL, Redis, AWS S3
Leviosa Wellness booking platform with tri-role access (client/partner/admin), Stripe payments, and encrypted PII at rest. Modular monolith with 5 bounded services. Go, SvelteKit, PostgreSQL, SQLite, Stripe, Vault, RabbitMQ
Germinal Cultural events and talent management platform — guest-first reservations, bilingual support, middleware architecture, background jobs, production infrastructure. SvelteKit, TypeScript, PostgreSQL, Drizzle ORM, Stripe
Encx Go cryptography library — struct-tag-driven field-level encryption, envelope encryption with zero-downtime key rotation, and code generation. Go, AES-GCM, Argon2id, HashiCorp Vault, AWS KMS

Experiments

  • VizRaft — From-scratch implementation of the Raft consensus algorithm in Go, with a real-time visualizer for leader elections, log replication, and network partitions.

Stack

Languages: Go, TypeScript, Python, C, SQL Frameworks: SvelteKit, Wails Databases: PostgreSQL, SQLite Infrastructure: Docker, Ansible, Terraform, Linux Tools: Neovim, Git

Background

  • Master 1, Mathematics & Applications — CY Cergy Paris Université
  • Licence de Mathématiques — Sorbonne Université

Beyond code

Electric guitar · Electronics tinkering · Self-hosting

Get in touch

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  1. Leviosa-care/leviosa Leviosa-care/leviosa Public

    Logiciel de gestion d'acitivite pour l'entreprise Leviosa

    Go

  2. encx encx Public

    A lightweight Go package for encrypting, decrypting, and hashing struct fields using AES-GCM, Argon2id, and SHA-256.

    Go

  3. germinal germinal Public

    Platform for showcasing sensory experiences and creative talents. SvelteKit + TypeScript + PostgreSQL + S3. Event galleries, talent profiles, admin panel, and contact forms.

    Svelte

  4. cluo cluo Public

    Full-stack case management platform for private investigators — from intake to client delivery.

    Go