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PierreBlg/Readme.md

Hi, I'm Pierre 👋

Software Engineer • Founder @CELEST

I design and build business software, SaaS platforms and AI-powered applications.

Over the past few years, I've developed products ranging from IoT SaaS platforms to real-time financial engines and AI-powered business tools. I enjoy turning complex business problems into reliable, maintainable software.

Today, through CELEST, I help startups, SMEs and software vendors design, build and scale modern software products—from architecture to production.


What I build

🏢 Business Applications

Software tailored to real business workflows.

  • Internal platforms
  • Process automation
  • APIs
  • Business tools

☁️ SaaS Platforms

Scalable products designed to grow.

  • Multi-tenant architecture
  • Authentication
  • Billing
  • APIs
  • Monitoring

🤖 AI Solutions

Practical AI integrated into business software.

  • RAG
  • LLM integrations
  • AI assistants
  • Semantic search
  • Workflow automation

⚙️ Distributed Systems

High-performance backend systems built for reliability.

  • Event-driven architecture
  • Real-time systems
  • WebSockets
  • Low latency
  • Microservices

Selected Projects

🚀 TiqTag — Digital Product Passport Platform

Lead Developer & Software Architect.

Designed and built an IoT SaaS platform allowing companies to associate physical products with secure digital passports through NFC technology.

Highlights

  • SaaS platform
  • Shopify integration
  • Stripe integration
  • NFC pairing
  • PostgreSQL
  • Product lifecycle management

⚡ CELEST Exchange

Designed and developed a real-time financial matching engine focused on performance and reliability.

Highlights

  • Rust
  • WebSockets
  • Redis
  • Low-latency architecture
  • Distributed backend

🤖 AI Business Applications

Development of AI-powered assistants integrated into business software.

Topics

  • Retrieval-Augmented Generation (RAG)
  • Document search
  • LLM integration
  • Business workflows
  • Automation

💸 Flash Loans Protocol

Research project around decentralized finance and atomic transaction systems.

Focus:

  • Rust
  • Financial algorithms
  • Liquidity pools
  • Smart contract architecture

Technologies

Languages

  • TypeScript
  • Rust
  • Python

Backend

  • Node.js
  • NestJS
  • Fastify
  • gRPC
  • WebSockets

Frontend

  • React
  • Next.js

Data

  • PostgreSQL
  • Redis
  • TimescaleDB

Cloud & DevOps

  • Docker
  • Kubernetes
  • CI/CD
  • AWS

Architecture

  • SaaS
  • Distributed Systems
  • Event-Driven Architecture
  • Hexagonal Architecture
  • Microservices

AI

  • OpenAI
  • Anthropic
  • RAG
  • Vector Databases
  • AI Agents

Engineering Philosophy

I believe technology should solve business problems—not create unnecessary complexity.

My focus is always the same:

  • Understand the business.
  • Design the right architecture.
  • Build reliable software.
  • Keep it maintainable.

About CELEST

CELEST is my software engineering studio.

I work with startups, SMEs and software vendors to design and develop business applications, SaaS platforms and AI solutions.

From idea to production.


Let's connect

🌐 LinkedIn

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