Professional Software Development & IT Services

CST is a professional IT service provider headquartered in Svilengrad, Bulgaria. For nearly three decades we have designed and delivered custom software, cloud & multi-cloud platforms, DevOps and infrastructure, Big Data, Blockchain, and real-time communication solutions for enterprise clients across Europe.

Our mission is to turn our clients’ vision into high-quality, functional, and reliable software — a commitment reflected in long-term partnerships with companies such as Deutsche Telekom, SAP, and T-Systems.

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Services

Custom Software Development

End-to-end engineering of web, mobile, and enterprise applications — from requirements gathering and architecture to deployment and long-term support.

Cloud & Multi-Cloud

Cloud architecture, migration, and Kubernetes orchestration across AWS, GCP, Azure, Alibaba Cloud, and on-premise environments.

DevOps & Infrastructure

CI/CD automation, Infrastructure as Code (Terraform, Ansible), Kubernetes administration, monitoring, and system integration.

Big Data & Analytics

Hadoop-based platforms and data pipelines (Cloudera, Hortonworks, Spark, Kafka) that turn large datasets into business insight.

Blockchain & DLT

Hyperledger Fabric and Indy networks, smart contracts, self-sovereign identity (DID/SSI), and distributed ledger research.

Data Spaces & GAIA-X

Sovereign, compliant data sharing built on GXFS, the Eclipse Dataspace Connector, and IDS/GAIA-X standards.

WebRTC & VoIP

Real-time audio/video platforms, SIP/RTP protocol stacks, TURN/STUN infrastructure, and unified messaging solutions.

Consulting & Outsourcing

Technology strategy, architecture consulting, and dedicated nearshore engineering teams from Bulgaria.

Selected Projects

We have delivered platforms and products for some of Europe’s largest enterprises and research programs — GAIA-X federation services, a multi-cloud orchestrator, blockchain networks, AI customer-service systems, and Big Data infrastructure.

Explore our projects →

Technologies

About CST

Founded in 1997, CST has grown from an IT hardware and software company into a full-stack software engineering partner for enterprises across Europe — today operating from Svilengrad and Sofia, Bulgaria.

Milestones

Clients & Partners

Contact

Address: ul. General Strukov 5, Svilengrad 6500, Bulgaria Phone: +359 877 336002 Email: contact@cst-bg.net

Get in touch — we would love to hear about your project.