CST

CST is a software development and IT services company headquartered in Svilengrad, Bulgaria. Founded in 1997, it builds and runs custom software, cloud platforms and data systems for enterprise clients and research programmes across Europe.

What CST offers

• Custom software development — web, mobile and enterprise applications, from requirements and architecture through deployment and ongoing support.
• Cloud and multi-cloud — cloud architecture, migration and Kubernetes orchestration on AWS, GCP, Azure, Alibaba Cloud and on-premise setups.
• DevOps and infrastructure — CI/CD pipelines, infrastructure as code with Terraform and Ansible, monitoring and system integration.
• Big Data and analytics — Hadoop-based platforms and data pipelines using Cloudera, Hortonworks, Spark and Kafka.
• Blockchain and data spaces — Hyperledger Fabric and Indy networks, smart contracts, self-sovereign identity and GAIA-X data-sharing services.
• Real-time communications — WebRTC audio and video platforms, SIP/RTP stacks and TURN/STUN infrastructure.

Who it works with

CST names long-running work with Deutsche Telekom, SAP and T-Systems. Its projects include GAIA-X federation services, a multi-cloud orchestrator and AI customer-service systems, and it also supplies dedicated nearshore engineering teams from Bulgaria.

Key facts

• Based in: Svilengrad, Bulgaria
• Founded: 1997
• Languages and frameworks: Python, Go, Java, C/C++/C#, .NET, TypeScript, React, Angular, Vue and Django