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Lucas Fontes Email & Phone Number

Staff Engineer at Cosmonic
Location: Waterloo, Ontario, Canada 18 work roles
1 work email found @instacart.com 4 phones found area 226, 347, and 416 LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 86%

Contact Signals · 1 work email · 4 phones

Work email l****@instacart.com
Direct phone (226) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Role
Staff Engineer
Location
Waterloo, Ontario, Canada

Who is Lucas Fontes? Overview

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Quick answer

Lucas Fontes is listed as Staff Engineer at Cosmonic, based in Waterloo, Ontario, Canada. AeroLeads shows a work email signal at instacart.com, phone signal with area code 226, 347, 416, and a matched LinkedIn profile for Lucas Fontes.

Lucas Fontes previously worked as Staff Engineer - Edge Networking / Bot Protection at Instacart and Chief Architect at Auth0.

Company email context

Email format at Cosmonic

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{first}.{last}@instacart.com
86% confidence

AeroLeads found 1 current-domain work email signal for Lucas Fontes. Compare company email patterns before reaching out.

Profile bio

About Lucas Fontes

I've started my career back in 1997 at 14 years old, setting up 'USRobotics' modems to pay for my own internet access. It was about the same time I've started using AIX & Linux (after waiting 3 months for a shipment from cheapbytes to arrive), and started building my own programs.At that age I was managing various machines from DNS to Quakeworld servers and helping set up Internet Service Providers in nearby cities. During this period I had my first exploit published by Security Focus [smtp-analysis] and read as many rfcs as I could.I have over 20 years in network operations and programming starting when servers had 128mb of ram and c10k paper wasn't even published yet. I've been blessed with the opportunity to work with many smart people and acquired extensive knowledge in designing and implementing large scale systems using mostly open-source software.I've learned that sometimes you have to write a design document; but sometimes you have to put your headphones on and code like there's no tomorrow. I'm a generalist by heart, and a layer 2-7 network wizard by trade.

Listed skills include C, C++, Xmpp, Voip, and 46 others.

Current workplace

Lucas Fontes's current company

Company context helps verify the profile and gives searchers a useful next step.

Cosmonic
Cosmonic
Staff Engineer
AeroLeads page
18 roles · 28 years

Lucas Fontes work experience

A career timeline built from the work history available for this profile.

Staff Engineer

Current

Arlington, VA, US

making server-side webassembly happen

Jul 2024 - Present

Staff Engineer - Edge Networking / Bot Protection

San Francisco, CA, US

Working on Instacart's Foundational Infrastructure Layer, including Compute, Network, IAM and Edge.My focus has been on the Edge ( CDN, DNS, WAF, Functions, VPNS ), taking care of any packet in or out our public infrastructure.

Aug 2021 - Feb 2023

Chief Architect

Bellevue, WA, US

Leading Auth0 Architecture Group ( Product x Infra x Data ) through our MultiCloud journey.

Apr 2021 - Sep 2021

Principal Engineer

Bellevue, WA, US

Leading the Company's effort to replatform on Kubernetes and CNCF toolkit.Improving Infrastructure Security Posture through network segregation, fine grained network policies and mTLS.Platform cost reduction via services bin-packing & elastic infrastructure scaling.

Aug 2020 - Apr 2021

Principal Member Of Technical Staff

San Francisco, California, US

Principal @ Heroku Runtime, focused on single & multi-tenant environments including:- HTTP Routing Layer: Implemented HTTP/1.1 pipelining & HTTP/2 binary support to Heroku's Private Router- Logging ( Logplex ): Migrated Heroku's Logging pipeline from Erlang to Go- Kubernetes: Designed Heroku's internal kubernetes platform in conjunction with AWS Team.

May 2019 - Aug 2020

Cloud Engineer

San Jose, California, US

Building Netapp Kubernetes Service, a multi-cloud Managed Kubernetes offering.A short lived project https://www.storagereview.com/news/netapp-kubernetes-service-nks-come-to-an-end

Jan 2019 - May 2019

Kubernetes Tech Lead

New York, NY, US

DigitalOcean is a cloud provider with a distributed engineering team.Moved DigitalOceans' Public API rate limiter from the API codebase to our Load Balancers, allowingany microservice in our internal infra to also count towards users' global rate limiting.Participated in converting DigitalOceans' core scheduling system from Ruby to Go, breaking up a.

Jan 2017 - Dec 2018

Senior Production Engineer

Ottawa, ON, CA

Asset Delivery OptimizationOptimized time-to-first-byte with a Multi-CDN setup, having traffic routed to a different CDN parter depending on users'location.Optimized pipelining by selectively activating HTTP2 on supported connections, which incidentally resulted in reducednetwork traffic.Continuous IntegrationDesigned Pipa: A kubernetes centric build.

May 2016 - Jan 2017

Chief Architect

Toronto, Ontario, CA

Uken Studios is a Canadian Game Studio located in Toronto with games such as Jeopardy! in their portfolio.As Operation Lead, my #1 priority was to increase games' stability. As it turns out, a great deal of performance issueswere DB (mysql) related. So we had to become very good at deploying, operating and tuning mysql instances.Gaming web traffic is.

Aug 2013 - Apr 2016

Senior Systems Engineer

Waterloo, Ontario, CA

Fongo is a Canadian mobile carrier providing free phone & texting services for thousands of users in Canada and around the world.Solo backend engineer designing and operating a modern VOIP infrastructure optimized for poor cellular/wifi conditions.During this time I've published my first go library.

Jul 2012 - Aug 2013

Staff Engineer - Office Of The Cto

Waterloo, ON, CA

Sandvine produces high performance network bridges with filtering capabilities.Most of my tenure at Sandvine was in the Professional Services team, responsible for pre and post sales engagement aswell as designing & developing any custom integration needed for the contract.In this position, I've travelled around the globe for sales, training, requirements.

Mar 2008 - Jun 2012

Senior Developer

Waterloo, Ontario, CA

Content categorization and filteringDistributed categorization system using Lucene and libevent3rd party network appliances integration: Cisco, Squid Cache, ISA ServerDeep packet inspection kernel modules for Linux and SolarisURL based traffic shapping using linux TC and layer7 filters

2007 - Mar 2008

Senior Software Engineer

C3Systems

Large scale email solutions using QMail, LDAP and memcache.Deployed at the biggest national ISP (iG Portal with +17 million accounts), having its spam detection system handlingover 3+ million emails a day on 2 x86 servers.Designed and implemented a multi-site comment system, used across all iG's web properties.Developed C/C++ webservices for high.

Jun 2005 - Mar 2007

Consultant

US

Migration of entire email base (2 million accounts) from HSphere to QMail + LDAP.REGISTRAR integration for.com.br domains.VOIP-to-PSTN gateway implementation, using asterisk.Datacenter migration between cities 600km apart, rebuilding 200 servers in just one night (and no sleep!)

Feb 2004 - Jun 2005

Senior Developer

Ig

Captive Portal authentication integrating with Nortel Shasta and Cisco LNS; using java, oracle and ldapDynamic Firewall System with one time passwords (OPIE) for authentication. Inline protocol inspection for plain-text protocols such as FTP for auditingRADIUS design and implementation. Handling millions of logins daily for dial-up, ADSL and satellite.

Nov 2000 - Jan 2004

Junior Developer

Myweb Do Brasil

Internet access using your Tv as monitor !! Unfortunatelly company lasted only 8 months:(Content management system using LAMP stack, with good looking templates

2000 - 2000

Developer

Clips Uol

ISP setup & operations.DNS, Email, webservers, radius & tacacs.Game server management ( CS 1.6, Quake )

1999 - 1999

Developer

AR

ISP administration.Tacacs, dial-up configuration, FTP&web.

1998 - 1998
FAQ

Frequently asked questions about Lucas Fontes

Quick answers generated from the profile data available on this page.

What company does Lucas Fontes work for?

Lucas Fontes works for Cosmonic.

What is Lucas Fontes's role at Cosmonic?

Lucas Fontes is listed as Staff Engineer at Cosmonic.

What is Lucas Fontes's email address?

AeroLeads has found 1 work email signal at @instacart.com for Lucas Fontes at Cosmonic.

What is Lucas Fontes's phone number?

AeroLeads has found 4 phone signal(s) with area code 226, 347, 416 for Lucas Fontes at Cosmonic.

Where is Lucas Fontes based?

Lucas Fontes is based in Waterloo, Ontario, Canada while working with Cosmonic.

What companies has Lucas Fontes worked for?

Lucas Fontes has worked for Cosmonic, Instacart, Auth0, Salesforce, and Netapp.

How can I contact Lucas Fontes?

You can use AeroLeads to view verified contact signals for Lucas Fontes at Cosmonic, including work email, phone, and LinkedIn data when available.

What skills is Lucas Fontes known for?

Lucas Fontes is listed with skills including C, C++, Xmpp, Voip, Diameter, Radius, Dns, and Java.

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