Freelancer profile translated to English.
Back to original languageAbout Arnaud
I buildGenerative AI (GenAI)systems, deploy them on your infrastructure of choice, and operate them long-term.
I designed and runMerlin Cloud(merlincloud.dev): an agentic AI SaaS platform built solo, end-to-end.Open source, in production.
Product Engineer, 15 years of experience.4 years leading the architecture of critical financial systems at XBTO (crypto-finance). Previously: L'Oréal, Ekimetrics, Forest Admin (eFounders / Hexa, behind Aircall and Spendesk).
What I deliver
- 🤖 **Agents & LLMs**: multi-agent orchestration, MCP, RAG (LangChain, Pinecone, pgvector), LLM integration
- 🏗️ **Complete product**: AI-native from A to Z, back-end (Node.js, Python, C#, Go, Rust), front-end (React, Next.js, HTMX), APIs
- ⚙️ **Business process automation**: workflows and scheduled agents
- 🔒 **Security & governance**: DevSecOps, CI/CD vulnerability analysis (Snyk, Trivy), enterprise authentication (SSO, Okta, Keycloak), GDPR, AI Act
I deploy where you want
Proprietary models (GPT, Claude, Gemini) or open-source, according to your constraints; I do not train models.
- ☁️ A managed platform that I host and operate
- 🏠 Your own infra (AWS, Azure, GCP, on-prem), self-hosted models (Llama, Qwen, Mistral), **your data stays with you**, GDPR
- 🛠️ Or an infra that I set up for you
- 📊 Observability (OpenTelemetry, Datadog, Grafana), CI/CD, Docker/Kubernetes; long-term maintenance and evolution
Whether you're starting from a POC, from scratch, or have an existing online product (finance, regulated or sensitive environments),I deliver a reliable production system.
🎯 Roles:Forward Deployed Engineer, Platform Architect / Engineer, GenAI Tech Lead
Available 3 to 5 days/week, remote or on-site.
Describe your need, and I'll quickly tell you if I'm the right person.Response within 2 hours.
English
Fluent
French
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- BigSeed StudioMerlin Cloud: Founder & Product EngineerSOFTWARE PUBLISHINGApril 2026 - July 2026 (3 months)Paris, FranceMerlin Cloud is anagentic development environment (agentic coding)SaaS platform, in production (merlincloud.dev), which I designed and operate solo, end-to-end. **An AI-native product**, under my company BigSeed Studio.- **Multi-agent and multi-model orchestration**, scheduled agents.- **Connect any model**: proprietary (GPT, Claude, Gemini) or self-hosted open-source (Llama, Qwen, Mistral).- **Security & governance**: authentication (Clerk/JWT), CI/CD vulnerability analysis, testing, observability, data governance (GDPR), deployment on infrastructure I control.- **The complete product around it**: product definition (positioning, pricing, subscription), UX/UI and landing pages, multi-tenant containers, reverse tunneling, Stripe billing, admin dashboard (events, analytics).Stack: Python/FastAPI, HTMX, Tailwind, rootless Podman, PostgreSQL, Stripe, Clerk, MCP.
- XBTO FranceSenior Software Engineer – Financial SystemsPRIVATE EQUITYJanuary 2022 - April 2026 (4 years and 3 months)Paris, France**I built and re-architected the financial data platform**, in a regulated environment and on sensitive data: ingestion and processing of **large volumes of market data (time series)**, reference data, balance and position engines, calculation of AUM, NAV, PnL, and exposures.**I unified access to all this data behind a single self-service API (single source of truth)**, also exposed via **MCP servers**, with two use cases:-for teams(accounting, operations, product): investigate issues faster and get answers to their financial questions in natural language;- **for AI agents**: triggered in case of error, they autonomously detect anomalies in the data and alert as early as possible, speeding up reconciliation and integrity checks, including **finding the root cause where existing systems failed**.I also **trained tech teams on the use of LLM tools**.Security & operations:enterprise authentication (Okta), CI/CD, data integrity checks, observability (Grafana), Kubernetes deployment on AWS.Stack: Python, C#, PostgreSQL, ClickHouse, SQL Server, NATS, AWS, Kubernetes, Okta, Grafana, MCP.
- EkimetricsFull Stack EngineerCONSULTING AND AUDITSFebruary 2021 - September 2021 (7 months)Paris, FranceFull-stack engineer for a major cosmetics group: I built a web platform to process and make readable the outputs of a machine learning pipeline, serving the business teams.Stack: Node.js, React, Next.js, BigQuery, Google Cloud.
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Education
- Master's degreeEPITECH - European Institute of Technology2014
- 4th yearCalifornia State University-San Marcos2013J'ai étudié l'IA et l'architecture informatique en Californie.