Callista Tech Stack

Data platform advisory and agentic AI staffing for enterprise clients

Professional Services Zug 51–200 employees Founded 2010 Privately Held

Callista is a Swiss consulting and staffing firm focused on data platforms and agentic AI, with a nearshore delivery model. The tech stack reveals heavy enterprise integration work: Java/Spring Boot on OpenShift, Kafka, SAP BusinessObjects, and Azure infrastructure. Active adoption of Azure Landing Zone combined with migration away from SAP BW/4HANA and Excel points toward cloud-first modernization. The hiring profile is senior-weighted (20 of 25 roles) across engineering and data, matching the capital-intensive nature of enterprise platform upgrades they're delivering.

Tech Stack 75 technologies

Core StackJava Kotlin OpenShift Kafka C# Python JavaScript Azure AD Terraform Spring Boot CI/CD SAP BusinessObjects SQL UiPath VB.NET Git Excel Azure Azure Policy Azure Monitor Bicep ARM Templates Microsoft Dynamics 365 Sales Google Apps Script Google Sheets Google Workspace VBA Jakarta EE REST JPA+37 more

AdoptingAzure Landing Zone

ReplacingSAP BW/4HANA Excel

What Callista Is Building

◆Challenges

Expanding existing microsoft dwh
Optimizing business processes
Upgrading legacy businessobjects platform
Performance optimization
Modernizing reporting structures
Building cloud infrastructure from scratch
Cloud governance
Security compliance
Process excellence in sales operations
Pipeline transparency

▲Active Projects

Upgrade sap businessobjects platform to 2025
Integration of new data sources into oracle dw
Migrate to bw/4hana
Rpa robot development
Bot orchestration and monitoring
Azure landing zone setup
Cost control policy development
Multi-cloud integration concepts
Crm implementation and rollout
Modernize reporting structures

Hiring Activity

Accelerating25 roles · 10 in 30d

Department

Engineering

Data

Ops

Executive

Sales

Security

Seniority

Senior

Mid

Manager

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About Callista

Callista advises and staffs enterprise clients on data warehouse architecture, business intelligence, and agentic AI implementation. The company operates from Switzerland (Zug HQ) with nearshore delivery in Serbia and distributed hiring in Germany, blending on-site Swiss proximity with scalable offshore engineering capacity. Active project portfolio spans SAP modernization, Oracle data warehouse integration, RPA bot development, Azure cloud infrastructure setup, and CRM rollouts—primarily serving banking and insurance sectors. The business model combines fixed consulting engagements with flexible team augmentation and managed AI agent services.

HeadquartersZug

Company Size51–200 employees

Founded2010

Hiring MarketsSwitzerland, Serbia, Germany

Frequently Asked Questions

What tech stack does Callista use?

Primary stack: Java, Kotlin, Spring Boot, Kafka, Azure (VMs, Policy, AD, Monitor), Terraform, SAP BusinessObjects, Python, JavaScript, SQL. Secondary: OpenShift, CI/CD, Dynamics 365, UiPath RPA, Google Workspace.

What is Callista working on?

Enterprise modernization projects: SAP BusinessObjects platform upgrades, migration to BW/4HANA, Oracle data warehouse expansion, Azure Landing Zone setup, RPA bot orchestration, CRM implementation, and cloud governance frameworks.