Salim Gasmi

30 Years of Internet & Network Expertise
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About me

A hands-on technology leader with three decades of experience, I have led international teams at IPinfo, HAProxy and Meta, driven large-scale projects, and maintained deep technical expertise in Unix, networking, and distributed architectures.

  • Director of Data Engineering - IPinfo
    IP geolocationProbeNet: 1,300+ probesAPI: 1.4T requests/yearData pipelines
    2026present
  • HAProxy Director, ADN Edge - HAProxy
    Global Application Delivery Network100+ PoPsMillions of req/s1+ Tbps DDoS mitigated
    20242 years
  • Production Engineering Manager - Meta, London
    Instagram CI/CD500K+ serversAds database: 15B+ items3B+ users
    20195 years
  • CTO - SdV Plurimedia
    European MPLS network3 datacentersHigh-availability hostingDDoS mitigation
    200019 years
  • System and Network Administrator - SdV Plurimedia
    UnixPeering manager AS8839Web hostingC / PHPBGP
    19955 years

Also:

My skills

From the terminal to the boardroom

  • Vision and Strategy
  • Technical leadership and strategy
  • High-stakes project leadership
  • Long-term vision and budget ownership
  • People
  • International team management
  • Hiring and talent management
  • Mentoring and team upskilling
  • Teaching Unix at the University of Strasbourg
  • Technology
  • Architecture: large-scale distributed systems
  • Networking: TCP/IP, routing, BGP, MPLS
  • Systems & DevOps: Unix, observability, high availability
  • Data: ingestion pipelines, IP geolocation at scale
  • Coding: C, Go, PHP, Python, Bash
  • Shaders: GLSL, WebGL
  • Security: hardening, anti-DDoS, zero-trust
  • Containers: Docker, Kubernetes
  • AI: LLM APIs, PyTorch

In their words

Some feedback I received on LinkedIn

Salim stands out as one of the best managers I ever worked with, exhibiting a rare blend of deep technical understanding with a genuine commitment to nurturing his team.

Razvan AlecsandrescuProduction Engineer · Meta

Salim's extensive technical expertise across various fields, coupled with his adept communication skills, greatly contributed to the team's understanding and alignment with his vision.

Breno LeitaoProduction Engineer · Meta

Salim owns an extraordinary profile as CTO of SdV. His knowledge of the datacenter market, Tier-1 and IP among others is exceptional.

Miguel VilladaSr Consulting Engineer · Arbor Networks

Salim is a bright guy. Not the kind of average bright guy, he is a real bright, clever, smart engineer, with a very high focus on efficiency. He has turned SdV in a real Internet powerhouse.

Jean-Georges PerrinVP R&D · RBS

Projects

Tools built over the years, because what I needed didn't exist.

CEmail

Postfix GLD

A lightweight standalone greylisting daemon written in C for postfix, available on Ubuntu, Debian and many other distributions.

ShellDocker

Docker HCD

Docker was missing some high availability features I needed, HCD is a daemon that restarts unhealthy containers, downloaded more than 10,000 times.

PHPNetworkingHTML/CSS

BGPMap

Standard looking glasses were missing fanciness, I opted for a real time graphical BGP paths visualisation.

NetworkingArticle

Visualising RIPE ATLAS Anchor Measurements

An article on how to leverage RIPE ATLAS nodes to enhance your network observability, published by RIPE Labs.

GLSL3D

GPU GLSL Shaders

I always wanted to code GPU GLSL shaders as the programming logic is quite unique and challenging.

JavaScript3D

Three.js old school demos

As a former Amiga scene democoder, I recoded some old school demos using WebGL and Three.js.

CNetworkingWindowsReverse Engineering

L2WH Lineage II Network Sniffer
(2004-2009)

Reverse-engineered Lineage II's encrypted network protocol with zero documentation from NCSoft. Real-time packet capture, decryption and parsing to extract mob data, drop rates, item stats and XP metrics. Used by thousands of players worldwide, tolerated by NCSoft, and commercially acquired at end of life.

CAmigaOS

ClassAction for AmigaOS
(1994-1998)

ClassAction is a file manager for AmigaOS, written between 1994 and 1998, it was quite popular by that time.

Contact me

A project, a technical question, or just want to talk? Reach me by email or on LinkedIn.