siliceum
The siliceum team

Performance & Reliability experts who whisper to CPUsspeak your businesstame GC pauseskeep prod runningtarget 99.9% uptimehandle incidentstalk SLA fluentlyslim down P99

AAA video games, automotive industry, B2B SaaS, academic research. Our team combines unique backgrounds to solve your most complex technical challenges.

40+
Years of combined experience
3
Expertise domains
5+
Technical conferences

Nantes

Cédric CHARIERE FIEDLER

Cédric CHARIERE FIEDLER

President & Technical Director
Web & API Architect – Reliability, Performance, QA

Profile

When a critical platform slows down or crashes, I'm the one they call. I diagnose, stabilize, and implement safeguards so it doesn't happen again.

What drives me: transforming teams stressed by production into calm, quality-autonomous teams.

Key Results

Euromaster: API Architect Europe, 99.9% uptime on >2M req/day
Asobo Studio: UI optimization Flight Simulator 2024, 60fps goal achieved
Klafuti: Technical direction SaaS, support divided by 6 in 4 weeks

Expertise

SRE & ObservabilityWeb & API PerformanceAPI & Microservices ArchitectureCloud & PaaSMulti-level QATechnical Training

Technologies

TypeScriptNode.jsJavaNestJSAngularSpring BootAzureAzure DevOpsClever CloudElastic StackOpenTelemetryK6GitLab CITerraform

Certifications

ISTQB FoundationISTQB Performance TestingClever CloudAzure AZ-900ISIMA EngineerHPC Doctoral Program (Univ. Clermont Auvergne)
Conferences5
Patents1

Clermont-Ferrand

Clément GRÉGOIRE

Clément GRÉGOIRE

CEO & Consultant
Performance & Optimization Expert

Profile

I make C++ code run at 60 frames per second, whether in a virtual airplane cockpit or an audio synthesizer. When needed, I go down to the nanosecond.

After Flight Simulator and A Plague Tale at Asobo, I share this expertise by teaching operating systems at ISIMA (engineering school).

Key Results

Asobo Studio: Flight Simulator 2024 & A Plague Tale, 60fps
Arturia: Audio synthesizers, major perf gains
CBA Informatique: Mobile port, x10 CPU gain

Expertise

High-Performance C++CPU/GPU/Memory ProfilingConsoles (Xbox, PlayStation)Rendering & GraphicsMulti-threading & GPGPUTeaching (ISIMA)

Technologies

C++HLSLISPCPythonTypeScriptDirectX12OpenGLCUDAUnreal EngineTracy ProfilerCMakeAzure DevOpsPerforce

Certifications

ISIMA EngineerUQAC Master (Canada) - Video Games
Conferences3
Antoine GUELERAUD

Antoine GUELERAUD

CEO
Java Architect / Tech Lead

Profile

I take a complex business need and transform it into a running platform. From functional scoping to deployment, including dev team management.

I've coordinated teams of up to 20 people across 3 countries.
What I love most: growing developers as much as projects.

Key Results

Klafuti: CTO, accounting automation SaaS
Be-Ys: Tech Lead, 20+ people (FR/Tunisia/Bulgaria)
Michelin: IoT leak detection, 7-country European deployment

Expertise

Backend ArchitectureTechnical LeadershipFunctional AnalysisCloud & DevOpsMicroservicesMulti-team Management

Technologies

JavaTypeScriptSpring BootNestJSAngularAzureAzure DevOpsClever CloudKubernetesAnsibleTerraformTalend ETLGitLab CI

Certifications

Clever CloudISIMA Engineer
Damien DARQUY

Damien DARQUY

Senior Consultant
FullStack Developer / Lead Dev

Profile

I build Java backends that handle the load and Flutter mobile apps that run on every screen. Microservices, IoT, Azure Cloud: I've seen it all in 10 years.

When I'm not coding, I train the next generation of developers. Teaching is as important as delivering.

Key Results

Michelin: IoT Microservices, truck fleet tracking
Campus Coach: Multi-platform Flutter app (Montreal)
Human Booster/Simplon: Recognized PHP trainer

Expertise

Java/Spring BackendMobile FlutterAzure Cloud & DevOpsNoSQL & SQL DatabasesMicroservices ArchitectureRecognized Trainer

Technologies

JavaKotlinTypeScriptSpring BootFlutterAngularAzureKubernetesDockerMongoDBPostgreSQLNeo4jInfluxDBGitLab CIAnsible

Certifications

SUPINFO Master (2010-2015)

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