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SRE · Architect · Developer

An SRE who ships features.

I bridge infrastructure and code. I automate resilience, optimise for scale, and when a bottleneck shows up I rewrite it instead of just watching it burn. A rare combo that turns infra problems into code fixes.

Let's talk about your infra See the projects ↓
Arnaud Bruyer

01 Services

Five ways to work together.

Greenfield kickstart, distributed development, DevOps engagement, architecture review, or fractional CTO. Always in the first person — I'm the one who ships.

kickstart-greenfield

Kickstart / Greenfield MVP

Take a project from zero to a shipped MVP. No legacy baggage, defended stack choices, end-to-end ownership.

  • Defensible initial architecture: measured stack choices, not the framework du jour
  • MVP shipped in 4 to 12 weeks depending on scope
  • CI/CD, observability and isolated secrets in place from day one
  • Documentation and knowledge transfer for the team taking over
  • Track record: Conexia (multi-tenant RAG platform from zero), Endariel (SDK from scratch), TyphoonMC (Minecraft engine in Go)

On request

distributed-development

Distributed development

Real-scale systems: cross-instance sync, message brokers, actor systems, CRDTs, reverse engineering when the standard isn't enough.

  • Multi-instance architectures that hold up in production (proven on 50+ instances, 10,000+ concurrent users)
  • Typed distributed buses: Redis pub/sub, actor systems, message brokers — not strings broadcast blind
  • Cross-instance sync, CRDTs, shared state that stays consistent without contention
  • Reverse engineering of binary protocols and proprietary formats (NMS, custom packets, binary saves)
  • When the standard isn't enough: custom transport, low-level Netty, in-house protocols

On request

devops-sre

DevOps / SRE engagement

Long-term ownership of infra, CI/CD, and observability. I integrate with the team and ship.

  • Design and operation of production Kubernetes clusters (multi-tenant, multi-cloud: GCP, Scaleway, AWS, on-prem)
  • Full IaC: Terraform, Helm, ArgoCD, GitOps, secrets isolated per environment
  • GitLab-CI / Jenkins CI/CD pipelines with manual gates and legacy test support
  • Observability stack: Prometheus, Thanos, Grafana, ELK, actionable alerting
  • On-call and incident response if needed

On request

architecture-review-benchmarks

Architecture review & benchmarks

An independent review of your architecture, or a measured benchmark between 2-3 candidates, before you sign up for 18 months of delivery.

  • Architecture review: microservices, K8s, data pipelines, RAG / AI pipelines, multi-tenant platforms
  • Measured benchmarks on the metrics that matter (performance, cost, maintenance, product fit)
  • Stack comparison: 2 to 3 candidates evaluated in a 1-2 week POC
  • Detection of anti-patterns and invisible debt that doesn't show on diagrams
  • Prioritised recommendations with cost and effort estimates — not a list of good intentions
  • Written deliverable + live session with the team and decision-makers

On request

fractional-cto

Fractional CTO

Fractional technical leadership for SMEs and scale-ups that don't (yet) need a full-time CTO.

  • Technical framing of product decisions and architecture trade-offs
  • Tech hiring: role definition, interviewing, calibration
  • Setting up or consolidating processes: code review, releases, on-call
  • Technical roadmap and product vision aligned with business constraints
  • Regular presence — not a consultant who drops by once a month

On request

02 Case studies

What I've shipped lately.

Five projects, five different angles — from a multi-tenant Pacific RAG platform to a Minecraft engine rewritten in Go.

2020 → 2022 Server Developer

Dofus Touch

Server developer on Dofus Touch, the mobile version of Ankama's MMORPG. I owned the server-side roadmap: gameplay features, delivery pipeline, bot detection, operations.

  • Java
  • Maven
  • Nexus
  • GitLab Flow
  • GitLab-CI

2016 → 2017 Architect & backend developer

Endariel

The founding SDK of the Vidcraft Minecraft ecosystem: 2,133 commits over 11 months, 150+ Java classes under `fr.endariel`, a typed Redis pub/sub bus and direct NMS access laid down in 2016 when BungeeCord was still just a TCP proxy. This is the trunk that becomes Unitale in 2019.

  • Java 8
  • Spigot 1.10.2 (unispigot-server fork)
  • BungeeCord
  • Jedis 2.8
  • Apache HttpClient

2016 → 2021 Self-employed · SDK & backend architect

Unitale

Five years of solo dev: a custom Spigot fork, an 88K-line Java SDK, a type-safe mini-games framework, a 21K-line Symfony backend — operated for 100K+ unique players and 10K+ concurrent peak connections.

  • Java 8
  • Spigot (unispigot-server fork)
  • BungeeCord
  • Redisson
  • Hazelcast

03 Stack

What I work with day-to-day.

Not a wishlist — only what I've put into production or maintained for at least six months.

Infrastructure & Cloud

  • Kubernetes
  • Docker
  • Helm
  • ArgoCD
  • Terraform
  • Ansible
  • Rundeck
  • AWS
  • GCP
  • Scaleway
  • OpenStack
  • VMs / bare-metal

CI/CD & Automation

  • GitLab CI/CD
  • Jenkins
  • GitOps
  • Groovy
  • GitLab Flow
  • Maven + Nexus
  • Test automation

Observability

  • Prometheus
  • Thanos
  • Grafana
  • ELK / Elasticsearch + Logstash + Kibana
  • APM
  • Real-time alerting

Cybersecurity

  • Reverse engineering
  • OAuth 2.0
  • OpenID Connect
  • JWT
  • Secret isolation
  • Secure deployments

AI / ML

  • RAG
  • LLM routing
  • AI agents orchestration
  • Embeddings
  • Semantic search
  • Multi-tenant AI platforms
  • AI infrastructure
  • Pandas
  • Facebook Prophet
  • Anomaly detection

Data & Storage

  • PostgreSQL
  • MariaDB / MySQL
  • Oracle Database
  • Redis
  • Elasticsearch
  • Vector databases
  • Time-series databases
  • Apache Kafka
  • Hadoop / HDFS / HBase
  • Datalake

Game Backends & Protocols

  • Spigot / Bukkit
  • BungeeCord
  • Netty / custom packets
  • MC protocol RE
  • Distributed game state
  • Vert.x
  • Game design

Blockchain & IoT

  • Blockchain
  • Solidity
  • IoT
  • OpenStack

Languages

  • Go
  • Java
  • Python
  • TypeScript / JavaScript
  • Nim
  • Rust
  • C
  • Ruby
  • Bash
  • Groovy

04 Career

From SNCF in 2015 to Conexia in 2025.

From most recent to earliest. The thread stays the same: bridging infrastructure and code.

  1. Oct 2025 → present

    CTO Conexia Tahiti

    Freelance

    Building and scaling a multi-tenant AI chatbot platform for the Pacific region.

    • End-to-end design: RAG agents, semantic search, LLM routing, rich conversational UI
    • Scaleway infra: Kubernetes, Terraform, Helm + ArgoCD, GitLab CI/CD with secret isolation
    • Orchestration of 100+ workflows and omnichannel connectors (web, Gmail, Messenger)
    • New-client onboarding reduced to a single configuration file

  2. Jun 2024 → present

    Software Engineer & DevOps Consultant Kurafuto

    Parallel consulting

    Parallel consulting engagement: architecture, automation, and DevOps for select clients in the game backend and distributed systems space.

    • Distributed architecture and game backends consulting (Spigot, Netty, typed Redis pub/sub)
    • DevOps automation: GitLab CI/CD, Docker containerisation, Kubernetes deployments
    • Code reviews and technical mentoring for teams on sensitive projects
    • Run in parallel with main contracts (Exaion AI DevOps, then Conexia)

  3. Sep 2024 → Aug 2025

    AI DevOps Exaion (EDF subsidiary)

    Contract

    Maintaining and supervising AI infrastructure at a sovereign cloud provider.

    • Maintenance and supervision of AI infrastructure on Kubernetes
    • Built a Go API client and a dedicated Terraform module for client integrations
    • Designed custom cloud deployment tooling in Go
    • Internal automation tools for AI operations

  4. Mar 2022 → Sep 2024

    SRE & DevOps Authlete

    Full-time

    Multi-environment SRE (on-prem, isolated SaaS, shared SaaS) for an OAuth 2.0 / OIDC platform serving Japanese banks.

    • SaaS deployments on GCP and cloud-agnostic templates for on-prem
    • Reusable Kubernetes Helm + Terraform templates across clients
    • GitLab-CI CI/CD with support for every legacy version of the service
    • Java JUnit tests (unit + integration), Ruby (e2e + performance), OAuth/OIDC compliance

  5. Jul 2020 → Feb 2022

    Server Developer (Dofus Touch) Studio No Border

    Full-time

    I owned the server-side roadmap on the mobile version of the French MMORPG.

    • Daily Quests in Java → measurable retention lift
    • Bot detection service via weight accumulation → reduction of non-human accounts
    • Prod image pipeline: push pre-prod → manual approval → replicate to prod
    • Full operational stack: ELK / OpenSearch + APM, Prometheus + Grafana, Rundeck + Ansible

  6. Oct 2019 → Jan 2021

    Back-end Engineer Self-employed (Endariel network)

    Full-time

    Back-end, DevOps, and maintainer of a community video game network.

    • Participation in board meetings and strategic decisions
    • Java game SDK used by a team of developers
    • Team lead: code reviews, onboarding, mentoring
    • VM infrastructure management and custom deployment tools in JS and Go

  7. Aug 2019 → Feb 2020

    IoT & Blockchain Engineer Exaion (EDF subsidiary)

    Full-time

    Blockchain node maintainer and monitoring developer at the launch of Exaion.

    • Helped create a sovereign cloud provider
    • Set up monitoring, networking, physical servers, high availability (VMs and containers)
    • Custom monitoring software for blockchain and IoT components

  8. Nov 2017 → Aug 2019

    Data Engineer Apprentice EDF

    Apprenticeship

    Built a time-series database and maintained IoT infrastructure for the group's data lake.

    • Big data software and pipelines
    • Resilient and highly scalable time-series database
    • Maintenance and testing of group-scale IoT infrastructure

  9. Aug 2016 → Nov 2017

    SDK / Server Engineer Apprentice Vidcraft (Endariel)

    Apprenticeship

    Game SDK and infrastructure development for Endariel (Minecraft network with 100,000+ unique players).

    • Custom Java SDK for distributed games on top of the official Minecraft server
    • Centralised ML cheat detection service in Go
    • Server clustering system and real-time internal communications via pub/sub

  10. Aug 2015 → Aug 2016

    Web Developer Apprentice SNCF

    Apprenticeship

    Internal web tool in PHP + JavaScript — first real experience in a large-group environment.

05 Testimonials

The people I've worked with.

Testimonials reproduced as-is, no cosmetic editing.

I worked with Arnaud during the launch of Exaion, an EDF Group subsidiary specialised in Web 3.0. He did an amazing job and 2 years later we are still benefiting from the strong foundations he built to develop our 3D Cloud and Blockchain platforms. Arnaud is a true genius and a hard worker.

Fatih BALYELI

CEO · Exaion

Co-founder of the project I joined at launch

Arnaud provided the team with a constant flow of distributed-tech developments and various technical opportunities. Open to new challenges and with a critical eye on the most fashionable technologies, he far exceeded our expectations by successfully developing a distributed, SQL-compatible database tailored to our Big Data infrastructure. To do so, he went through many hard-to-grasp papers, read very complex code, and demonstrated solid engineering and reverse-engineering skills. As a bonus, he is a true reliable team-player!

Charles VALLEE

Big Data and IoT Engineer & Project Manager · EDF

Direct manager during the data engineering apprenticeship

He quickly integrated into our entity. His initiative and his ability to guide and exchange with the other developers on the project made him a key element.

Alexandre ISRAEL

CEO · Vidcraft

Head of the studio where I did my SDK / server apprenticeship

His technical skills are well recognised and allow him to deliver innovative and ergonomic solutions. He also took part in the company's innovation system, demonstrating his commitment and professionalism.

Thomas SCHREVERE

Digital Manager · SNCF

Mentor during the SNCF web apprenticeship

06 Open source

Code I publish — not just code I sell.

Five years maintaining a Minecraft engine rewritten from scratch in Go. Lightweight, embeddable, used in production on a network that reached 100,000+ players.

Projet phare

TyphoonMC

Moteur serveur Minecraft from scratch en Go. Implémentation propre du protocole, boucle de tick stable autour des 20 TPS, et un footprint mémoire qui tient sur du hardware modeste.

  • Go
  • Protocole Minecraft
  • OSS · 5 ans
90+ stars
Voir sur GitHub Read the case study → See the lab →

07 Blog

Long-form notes on infra, code, and architecture.

The topics I dig into deeply — pulled out of the to-do list, put down on paper.

08 Contact

The door is wide open.

Email is the fastest channel. Three lines on the context and I get back to you within the day.

Send an email LinkedIn GitHub ↗