Expert OpenTelemetry & Observability
Freelance consultant in Lille specializing in OpenTelemetry, distributed tracing and modern observability for your applications.
Tech stack
OpenTelemetry OTel Collector
Datadog
Grafana Tempo Prometheus
Splunk
Kubernetes
.NET / C#
Python · FastAPI%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20254.5%20225'%20style='enable-background:new%200%200%20254.5%20225;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill:%232DBCAF;}%20.st1{fill:%235DC9E1;}%20.st2{fill:%23FDDD00;}%20.st3{fill:%23CE3262;}%20.st4{fill:%2300ACD7;}%20.st5{fill:%23FFFFFF;}%20%3c/style%3e%3cg%3e%3cg%3e%3cg%3e%3cg%3e%3cpath%20class='st4'%20d='M40.2,101.1c-0.4,0-0.5-0.2-0.3-0.5l2.1-2.7c0.2-0.3,0.7-0.5,1.1-0.5l35.7,0c0.4,0,0.5,0.3,0.3,0.6%20l-1.7,2.6c-0.2,0.3-0.7,0.6-1,0.6L40.2,101.1z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3cg%3e%3cg%3e%3cg%3e%3cpath%20class='st4'%20d='M25.1,110.3c-0.4,0-0.5-0.2-0.3-0.5l2.1-2.7c0.2-0.3,0.7-0.5,1.1-0.5l45.6,0c0.4,0,0.6,0.3,0.5,0.6%20l-0.8,2.4c-0.1,0.4-0.5,0.6-0.9,0.6L25.1,110.3z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3cg%3e%3cg%3e%3cg%3e%3cpath%20class='st4'%20d='M49.3,119.5c-0.4,0-0.5-0.3-0.3-0.6l1.4-2.5c0.2-0.3,0.6-0.6,1-0.6l20,0c0.4,0,0.6,0.3,0.6,0.7l-0.2,2.4%20c0,0.4-0.4,0.7-0.7,0.7L49.3,119.5z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3cg%3e%3cg%20id='CXHf1q_3_'%3e%3cg%3e%3cg%3e%3cpath%20class='st4'%20d='M153.1,99.3c-6.3,1.6-10.6,2.8-16.8,4.4c-1.5,0.4-1.6,0.5-2.9-1c-1.5-1.7-2.6-2.8-4.7-3.8%20c-6.3-3.1-12.4-2.2-18.1,1.5c-6.8,4.4-10.3,10.9-10.2,19c0.1,8,5.6,14.6,13.5,15.7c6.8,0.9,12.5-1.5,17-6.6%20c0.9-1.1,1.7-2.3,2.7-3.7c-3.6,0-8.1,0-19.3,0c-2.1,0-2.6-1.3-1.9-3c1.3-3.1,3.7-8.3,5.1-10.9c0.3-0.6,1-1.6,2.5-1.6%20c5.1,0,23.9,0,36.4,0c-0.2,2.7-0.2,5.4-0.6,8.1c-1.1,7.2-3.8,13.8-8.2,19.6c-7.2,9.5-16.6,15.4-28.5,17%20c-9.8,1.3-18.9-0.6-26.9-6.6c-7.4-5.6-11.6-13-12.7-22.2c-1.3-10.9,1.9-20.7,8.5-29.3c7.1-9.3,16.5-15.2,28-17.3%20c9.4-1.7,18.4-0.6,26.5,4.9c5.3,3.5,9.1,8.3,11.6,14.1C154.7,98.5,154.3,99,153.1,99.3z'/%3e%3c/g%3e%3cg%3e%3cpath%20class='st4'%20d='M186.2,154.6c-9.1-0.2-17.4-2.8-24.4-8.8c-5.9-5.1-9.6-11.6-10.8-19.3c-1.8-11.3,1.3-21.3,8.1-30.2%20c7.3-9.6,16.1-14.6,28-16.7c10.2-1.8,19.8-0.8,28.5,5.1c7.9,5.4,12.8,12.7,14.1,22.3c1.7,13.5-2.2,24.5-11.5,33.9%20c-6.6,6.7-14.7,10.9-24,12.8C191.5,154.2,188.8,154.3,186.2,154.6z%20M210,114.2c-0.1-1.3-0.1-2.3-0.3-3.3%20c-1.8-9.9-10.9-15.5-20.4-13.3c-9.3,2.1-15.3,8-17.5,17.4c-1.8,7.8,2,15.7,9.2,18.9c5.5,2.4,11,2.1,16.3-0.6%20C205.2,129.2,209.5,122.8,210,114.2z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
Go
PagerDuty OpenTelemetry OTel Collector Datadog Grafana Tempo Prometheus Splunk Kubernetes .NET / C# Python · FastAPI Go PagerDuty
I make your distributed systems finally readable.
Sylvain Germe, freelance consultant based in Lille, specialised in observability and OpenTelemetry. I work across France to instrument, collect and make sense of your telemetry — traces, metrics and logs.
From audit to production, I guide your teams towards modern, lean and standardised monitoring, with no vendor lock-in.
OpenTelemetry
Instrumentation, collection and export of telemetry, from SDK to Collector.
Distributed Tracing
Architecture and rollout of tracing across your microservices.
Metrics & Logs
Collection and correlation of signals for fast diagnosis.
A stack mastered, from code to dashboard
Open standards, modern languages and distributed architectures: the full expertise for observability that holds up in production.
01 Technologies
- OpenTelemetry · SDK, API, Collector
- Datadog · Grafana · Tempo
- Splunk · Prometheus
- Cloud platforms (AWS, GCP, Azure)
02 Languages & Frameworks
- C# / .NET
- Python / FastAPI
- Go
- Auto & manual instrumentation
03 Architecture
- Microservices
- Kubernetes · Docker
- Event-driven architecture
- Hexagonal architecture
From audit to operations, I cover the whole chain
Four ways to work together, depending on where you stand with observability.
Audit & Consulting
- Audit of your existing observability
- Architecture recommendations
- OpenTelemetry migration strategy
- Team training
Implementation
- OpenTelemetry instrumentation
- Collector configuration
- Data pipeline setup
- Integration with your backends (Jaeger, Tempo, etc.)
Optimization
- Observability cost reduction
- Sampling optimization
- Performance and scalability
- Data quality improvement
Support & Maintenance
- Technical support
- Troubleshooting
- Solution evolution
- Technology watch
Transparent pricing tailored to your needs
Free quote within 48 h. Degressive rates on long engagements.
★ Missions delivered as an independent consultant or through partner firms.
Why hire an OpenTelemetry expert?
Time Saving
Avoid costly mistakes and accelerate your deployment with proven expertise.
Cost Reduction
Optimize your observability and reduce your infrastructure and licensing costs.
Open Standard
OpenTelemetry is vendor-neutral and ensures the sustainability of your investments.
Better Visibility
Truly understand what's happening in your distributed systems with quality traces.
What they say
The OpenTelemetry expertise allowed us to migrate our monitoring in just a few weeks. Result: -60% on our observability costs.
Very comprehensive OpenTelemetry training. Our teams are now autonomous on instrumentation.
Quality support to implement our distributed traces on our microservices architecture.
They trusted me
* Missions carried out as an independent consultant or through partner IT services companies
Let's talk about your project
An observability project, an OpenTelemetry question, or just want to chat? I reply within 24 hours.
- Location Lille, France — remote or on-site missions
- Response time Within 24 business hours
- Availability Missions from 3 days