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JOIN Tech Stack

Applicant Tracking System for mid-market hiring teams

Software Development Berlin 51–200 employees Founded 2018 Privately Held

JOIN operates a multi-tenant ATS built on a modern TypeScript/React frontend with Node.js and cloud infrastructure (GCP/AWS) supporting real-time job distribution to 250+ platforms. The hiring mix—engineering-heavy with parallel sales and design—reflects active infrastructure work (Terraform, CI/CD automation, Prometheus/Grafana monitoring) alongside revenue-focused initiatives, suggesting a shift from product-first to sales-led growth.

Tech Stack 31 technologies

Core StackReact TypeScript Redux GraphQL Jest Cypress Figma HubSpot Node.js AWS gRPC RabbitMQ Kafka Salesforce Kubernetes Terraform Prometheus Grafana LinkedIn Recruiter HTML5 CSS Zustand REST React Testing Library Git GCP Protocol Buffers AWS SNS Google Cloud Pub/Sub Terramate+1 more

What JOIN Is Building

Challenges

  • Optimising hris systems
  • Reducing churn
  • Inbound lead conversion
  • Expansion opportunity identification
  • Reliability issues
  • Scalability challenges
  • Security compliance
  • Performance optimization
  • Scalable brand system
  • Marketplace optimisation

Active Projects

  • Brand system evolution
  • Campaign asset development
  • Building a new engineering hub from the ground up
  • Hris optimisation
  • Inbound lead conversion
  • Up- and cross-selling
  • Crm lead management
  • Infrastructure-as-code setup with terraform and terramate
  • Ci/cd pipeline automation
  • Monitoring and observability improvement with prometheus and grafana

Hiring Activity

Steady15 roles · 6 in 30d

Department

Engineering
6
Sales
3
Design
2
HR
2
Executive
1

Seniority

Senior
9
Mid
5
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About JOIN

JOIN is a Berlin-based recruiting platform designed for mid-market companies to manage the full hiring lifecycle: posting jobs across multiple channels, screening candidates, facilitating communication, and tracking pipeline progression. The product consolidates job posting, applicant tracking, and candidate evaluation into a single interface. Founded in 2018 and operating across Germany and Spain, the company employs 51–200 people and continues to scale both technical infrastructure and sales operations.

HeadquartersBerlin
Company Size51–200 employees
Founded2018
Hiring MarketsGermany, Spain

Frequently Asked Questions

What tech stack does JOIN use?

Frontend: React, TypeScript, Redux, Zustand. Backend: Node.js, GraphQL, REST, gRPC. Infrastructure: GCP, AWS, Kubernetes, Terraform. Messaging: Kafka, RabbitMQ, AWS SNS. Observability: Prometheus, Grafana. Testing: Jest, Cypress.

Where is JOIN headquartered?

Berlin, Germany. The company was founded in 2018 and is privately held, with active hiring in Germany and Spain.

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