Jonathan Muller
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Jonathan Muller Email & Phone Number

Technical Lead at lemlist
Location: France 11 work roles 1 school
1 work email found @dial-once.com 2 phones found area 364 and 318 LinkedIn matched
✓ Verified Jul 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 2 phones

Work email j****@dial-once.com
Direct phone (364) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Role
Technical Lead
Location
France
Company size

Who is Jonathan Muller? Overview

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Quick answer

Jonathan Muller is listed as Technical Lead at lemlist, a with 143 employees, based in France. AeroLeads shows a work email signal at dial-once.com, phone signal with area code 364, 318, and a matched LinkedIn profile for Jonathan Muller.

Jonathan Muller previously worked as tech lead at Lemlist and CTO at Open Room Inc.. Jonathan Muller holds Master'S Degree, Computer Engineering from Esgi.

Company email context

Email format at lemlist

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{first_initial}{last}@dial-once.com
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AeroLeads found 1 current-domain work email signal for Jonathan Muller. Compare company email patterns before reaching out.

Profile bio

About Jonathan Muller

Jonathan Muller is a Technical Lead at lemlist. He possess expertise in node.js, mongodb, c++, php, android and 32 more skills. He is proficient in German.

Listed skills include Node.Js, Mongodb, C++, Php, and 33 others.

Current workplace

Jonathan Muller's current company

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

lemlist
Lemlist
Technical Lead
France
Website
Employees
143
AeroLeads page
11 roles · 16 years

Jonathan Muller work experience

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

Tech Lead

Current

lempire is a group of passionate and curious individuals who have a very healthy obsession with building the world’s finest products and helping entrepreneurs worldwide grow profitable and successful businesses.The mantra we live by **Do things that you shouldn’t.**Our most famous product, lemlist, changed the way people do outreach.

Apr 2024 - Present

Cto

Current

Tokyo, Japan

Open Room Inc. is providing Saas software for Real Estate companies in Japan. We are transforming the industry with new ways to work and to communicate, openly.We focus on creating the best user experience through design, service reliability and code quality.The technologies we use includes Golang, Nodejs, Vuejs, Tensorflow, Tesseract and we rely on GCP. We value learning and exploration, and we want to make the work rewarding for everyone. Come join us !# Lead Engineer Jan. 2019 - Aug. 2019# CTO Aug. 2019 - Present

Jan 2019 - Present

Lead Developer

Paris Area, France

Led the rewriting of the entire backend stack from monolith to microservicesLed the stack migration from AWS to GCPAdded CI/CD to the development processEngineered software to automatically document the stack and microservices usageDesigned and implemented innovative software to ease the development process with a microservices stack, to allow product managers and developers to work in a fast, clean, and reliable way.

Jan 2017 - Aug 2018

Vice President Of Engineering

Paris Area, France

Joined the start-up at the PoC stage, and helped build the infrastructure and products to reach the first fundings as team grown up from 4 to 15+ employees.# Responsibilities - Ship on time features with highest technical quality - Ensure our uptime, latency and woldwide availability requirements - Define coding guidelines and development workflows - Deploy a scalable and modular production environment - Ensure a coherent Microservice architecture# Achievements - More than 3 millions daily active devices, served over the world on both AWS and baremetal servers - Nearly 200kk messages / day on our brokers, with around 6k msg/sec on peak hours# TechnologiesNode.js, RabbitMQ, MongoDB, Redis, Docker

Sep 2014 - Dec 2016

Game Programmer

Pukogames

Paris Area, France

Independent game studioDeveloping games on the following platforms:Xbox 360, PSP, Dreamcast, Windows, Linux and Web gamesMostly with C++, C# and PHP/JSWith small teams from 1 to 2 people / game

Sep 2010 - Dec 2014

Software Engineer

Chronoresto

Paris Area, France

Tech lead on new partnership development with YelpMaintain and improve the current website made with ASP.NET MVC and OrchardAdd new features to our order managment system where orders are sent live, ASP.NET MVC

Jul 2014 - Oct 2014

Software Engineer

Paris Area, France

Dev for startups as Independant MongoDB, AWS, Node.js, Redis, Angular, PHP

Jun 2013 - Sep 2014

Software/Web Developer

75011

C#/WPF video player devC++ Windows 7 Deskband devBacklogs managementJavascript/AngularJS

Aug 2012 - Jun 2014

Design Engineer Assistant

Paris Area, France

I was asked to take care of the whole information system of Asset Technology, during a year.This includes: manage the transition from outlook to gmail of the 250+ collaborators, debug and fix the internal servers, developing the new ERP from VB6 to C#, supporting users of many different softwares: from session login to SAGE configuration (configure the SEPA transition of remote payments)

2011 - 2012 ~1 yr

Web Developer

Mediaplazza

Paris Area, France

Developing a new internal CMS used to publish websites for mobile phones, from scratchTrain external consultants to this newly created productDeveloping DAO on the internal Framework based on ZendDev was on Windows using a virtual machine on Debian for server purposes

Aug 2009 - Dec 2010
Team & coworkers

Colleagues at lemlist

Other employees you can reach at lemlist.com. View company contacts for 143 employees →

1 education record

Jonathan Muller education

  • Esgi
    Esgi
    Computer Engineering
FAQ

Frequently asked questions about Jonathan Muller

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

What company does Jonathan Muller work for?

Jonathan Muller works for lemlist.

What is Jonathan Muller's role at lemlist?

Jonathan Muller is listed as Technical Lead at lemlist.

What is Jonathan Muller's email address?

AeroLeads has found 1 work email signal at @dial-once.com for Jonathan Muller at lemlist.

What is Jonathan Muller's phone number?

AeroLeads has found 2 phone signal(s) with area code 364, 318 for Jonathan Muller at lemlist.

Where is Jonathan Muller based?

Jonathan Muller is based in France while working with lemlist.

What companies has Jonathan Muller worked for?

Jonathan Muller has worked for Lemlist, Open Room Inc., Cubyn, Dial Once, and Pukogames.

Who are Jonathan Muller's colleagues at lemlist?

Jonathan Muller's colleagues at lemlist include Matthieu Jungfer, Marius Pittié, Erwan Hingre, Joshua Higgins, and Lilibeth Acuna.

How can I contact Jonathan Muller?

You can use AeroLeads to view verified contact signals for Jonathan Muller at lemlist, including work email, phone, and LinkedIn data when available.

What schools did Jonathan Muller attend?

Jonathan Muller holds Master'S Degree, Computer Engineering from Esgi.

What skills is Jonathan Muller known for?

Jonathan Muller is listed with skills including Node.Js, Mongodb, C++, Php, Android, Git, Docker, and Redis.

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