Services
Callista is a partner-managed IT company headquartered in Switzerland that specializes in providing experts, dynamic teams and managed capacity solutions for consulting, engineering and operational services. We combine the proximity and quality of a Swiss partner with the scalability of our nearshore center in Serbia.
Delivery Models
Our consultants serve as an extended workbench or drive innovation - whatever is the right support for our clients. We are also ready to cover temporary peaks or bridge bottlenecks. We ensure rapid availability of individual experts or entire teams that are managed by us or our clients.
Individual Experts
Team as a Service
Managed Capacity
Our Expertise
Besides supporting our clients with Experts and Teams to delivery impact in demanding projects, we also serve as Senior Consultants and Advisors in the following domains. We support in technology evaluations, design new architectures, prepare migrations or advise in make or buy decision.
Data Warehouse & Lakehouse
Our Data Warehouse and Lakehouse experts support you in the realization of complex projects throughout the entire data value chain for on premise and cloud initiatives using industry best practices.
Analytics & BI
Data is worth nothing if it doesn't support decision making processes. That is why our Analytics & BI experts are super experienced in data storytelling and visualization using the latest tools and methods.
Software Engineering
Our Software Engineering experts support you in the realization of complex software projects throughout the entire value chain of the agile development process.
CRM & Workflows
Our CRM and Workflow experts are supporting you as architects, consultants or engineers in making best use of your Microsoft 365 collaboration and CRM platform.
Cloud Engineering
In cloud transformation projects, the design of your cloud architecture is essential for long term success. We support you with cloud architecture, engineering and operations experts to ensure best possible business agility.
Security & IAM
Our Security and IAM experts help you to stay on top of the latest technologies, methods, and requirements in an ever-changing threat landscape and increasingly sophisticated techniques used by attackers.
Our Nearshore Center in Serbia
Access to the western part of the Balkan region: Serbia, Croatia, Slovenia, Bosnia and Herzegovina, Montenegro, North Macedonia
Owned and managed by Callista
Scalability and Competitive Pricing for individual experts or entire teams
Candidates are vetted by our own experts
Transfer Impact Assessment (TIA) in place to ensure equivalent Data Protection processes for non EU countries.
What our Clients are saying
Jannik Merch
Head Data Compliance, Rosenxt
“Callista is our trusted partner guiding and enabling us towards a future proof platform.”
Patrick Kaufmann
Head Software Engineering, CSS
"We are very satisfied with Callista. In addition to their high level of technical expertise, the software developers are characterized by their solution-oriented approach. They were able to integrate into the team quickly and thus provide productive benefits within a short time to relieve our internal staff as needed."
Thomas Grossen
CEO, Trendcommerce
"Our collaboration with Callista was constructive and efficient in every respect. The interaction between their expertise in the project and their coaching in the agile world worked extremely well. The implementation was carried out as planned and is thanks to the commitment of the experts and our on-site and nearshore teams. For me, it is a typical success story."
© 2025 Callista
© 2025 Callista