JEX Tech Stack

Sales automation platform for B2B customer acquisition and outreach

Software Development Rotterdam, Zuid-Holland 201–500 employees Founded 2020 Privately Held

JEX builds a sales platform consolidating prospect research, campaign execution, and performance tracking for B2B teams. The stack is .NET/C#-heavy with Azure infrastructure, and they're actively integrating OpenAI and LM Studio into lead generation and outreach workflows—indicating a pivot toward AI-powered sales automation. Engineering hiring is accelerating (7 open roles) while finance and HR roles suggest rapid scaling pressures; the active projects around AI lead follow-up and automating lead generation systems align with this directional shift.

Tech Stack 36 technologies

Core StackC# .NET Grafana Playwright Selenium JavaScript TypeScript Azure DevOps Angular GitHub Copilot SQL Server Entity Framework SCSS xUnit MassTransit NServiceBus Excel Git RxJS npm HTML CSS Azure Nx AFAS Topdesk OpenAI API LM Studio Codex REST API+6 more

What JEX Is Building

◆Challenges

Process bottlenecks
Upgrading frameworks
Automating current test processes
Speed improvement
Financial process development
Digitalization of work processes
Improving backoffice processes
Process improvement and digitalization
Identifying invoicing bottlenecks
Rapid growth demands organized backoffice

▲Active Projects

Larger test plan for jex
Ai lead follow-up
Ai solution sales in europe
Cloud-based microservice applications
Ai product applications
Automating lead generation systems
Developing targeting workflows
Integrating ai features into outbound strategy

Hiring Activity

Accelerating25 roles · 15 in 30d

Department

Engineering

Finance

Sales

Marketing

Ops

Seniority

Mid

Senior

Junior

Intern

Lead

Principal

Notable leadership hires: Tech Lead

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About JEX

JEX, founded in 2020 and based in Rotterdam, develops a sales platform that consolidates fragmented B2B acquisition workflows into a single environment. The product spans prospect list generation, industry data management, outreach campaign execution, and real-time performance dashboards. They operate across 201–500 employees in the Netherlands and are growing: 14 of 23 open roles posted in the last 30 days, with engineering and finance expansion driving scaling efforts. The platform targets mid-market B2B sales teams seeking to reduce manual sourcing and operational overhead.

HeadquartersRotterdam, Zuid-Holland

Company Size201–500 employees

Founded2020

Hiring MarketsNetherlands

Frequently Asked Questions

What tech stack does JEX use?

JEX runs .NET and C# as core infrastructure, with Azure cloud, SQL Server, Angular frontend, and Git/Azure DevOps for CI/CD. Testing relies on xUnit, Playwright, and Selenium. They integrate OpenAI API and LM Studio for AI features.

What is JEX working on?

Active projects center on AI: lead follow-up automation, sales automation in Europe, lead generation systems, and integrating AI features into outbound strategy. They're also scaling cloud microservices and expanding test coverage.