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VIER Tech Stack

AI-powered customer communication platform built on European infrastructure

IT Services and IT Consulting Hannover, Niedersachsen 201–500 employees Founded 2021 Public Company

VIER operates a contact-center and customer-engagement platform combining AI agents with human workflows, built entirely on German cloud and operated in-house. The tech stack reveals a modern AI-native architecture: Python + Go + Java for backend services, paired with LLM orchestration layers (DSPy, Dify, Haystack) and frontend React/TypeScript. Engineering hiring is concentrated on senior roles, and active projects show a focus on agent-in-production challenges (memory systems, workflow integration, AI agent rollout) rather than foundational platform work—indicating they're past proof-of-concept and scaling live agent workloads.

Tech Stack 36 technologies

Core StackPython Go Java GraphQL Docker Kubernetes React Redux Tailwind CSS JavaScript GitLab CI/CD Kafka Redis TypeScript Playwright Cypress Word Excel Outlook Teams Microsoft 365 DSPy Dify Haystack SQL Langfuse Socket.IO SCSS Docker Swarm Git+6 more

What VIER Is Building

◆Challenges

Automating complex workflows
Overall productivity improvement
Increasing upsell revenue

▲Active Projects

Onboarding neuer kunden
Kundenkommunikation
Cross- und upselling
Monthly invoice run
Contract management
Ai agent production rollout
Workflow integration for ai agents
Memory system implementation
User-client enhancement

Hiring Activity

Minimal10 roles · 1 in 30d

Department

Engineering

6

Support

3

Ops

1

Product

1

Seniority

Senior

7

Mid

2

Junior

1

Manager

1

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About VIER

VIER provides an AI-augmented communication platform for contact-center and business-process automation across service, sales, and administrative functions. The company serves mid-market and enterprise customers across multiple industries, emphasizing secure data handling and compliance through German cloud infrastructure and local support. The platform orchestrates contact workflows, agent-assistance features, voice analytics, and task automation, positioning human agents alongside AI capabilities rather than replacing them. Founded in 2021 and headquartered in Hannover, VIER operates as a public company with approximately 201–500 employees across Germany and Poland.

HeadquartersHannover, Niedersachsen

Company Size201–500 employees

Founded2021

Hiring MarketsGermany, Poland

Frequently Asked Questions

What technology does VIER use to build its AI platform?

VIER's stack includes Python, Go, and Java for backend services, with LLM orchestration via DSPy, Dify, and Haystack. Frontend is React and TypeScript. Infrastructure runs Docker, Kubernetes, Kafka, and Redis, with CI/CD through GitLab. Testing uses Playwright and Cypress.

What is VIER working on right now?

Current projects focus on AI agent production rollout, workflow integration for agents, memory system implementation, and customer onboarding automation. Internal priorities include productivity improvement and revenue expansion through upsell.