Custom applications & systems
We build desktop, server, industrial and embedded software in C, C++ and Python. We can take a project from technical specification and architecture through implementation, maintenance and continued development.
Zagreb, Croatia · software systems & telecom integration
Custom software for
demanding systems.
Unidata designs, builds and maintains software for systems where performance, reliability and clean integration matter—from C, C++ and Python applications to web platforms and telecommunication services.
C · C++ · Python · React · Node.js · MongoDB
Capabilities
From system core to user interface
We take on projects that need more than a generic implementation: application logic close to hardware, web products with substantial backend requirements, and integrations across telecom and cloud services.
Web platforms & backend systems
We build web applications where the interface and the underlying architecture both need to hold up. React and Next.js frontends connect to Node.js services, APIs and the right data layer—with clear structure, access control and room to evolve.
Telecom & API integration
We connect telephony, messaging and cloud services through well-defined APIs and server components. We handle protocols, event flows, failure handling and synchronization so independent systems operate as one reliable platform.
How we work
A clear path from requirements to production
Good engineering starts before the first line of code. We clarify decisions, risks and responsibilities early, then make progress visible through working software.
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Discovery
We map the business goal, users, existing systems, technical constraints and success criteria.
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Technical plan
We document the architecture, scope, dependencies, timeline and cost. Open questions and risks are surfaced before development begins.
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Build & verify
We work in short iterations and demonstrate working software regularly. Each iteration turns agreed requirements into functionality that can be reviewed and validated.
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Release & support
We support rollout, then continue with monitoring, fixes and further development for as long as they are needed.
Technology
Tools chosen for the system, not the trend
The stack follows the constraints: performance, security, integration and long-term maintenance. We stay within mature ecosystems we know well.
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Native & embedded systems
C · C++ · Embedded C
Performance-sensitive applications, firmware and software that runs close to hardware.
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Application logic & automation
Python
Services, internal tools, automation and data processing.
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Web interfaces
React · Next.js · Tailwind CSS
Responsive interfaces with a component structure that remains practical to extend.
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Backend & integration
Node.js · API design
Event-driven services, external integrations and explicit contracts between systems.
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Data & managed services
MongoDB · Firebase
Flexible data models and managed services where they simplify operation and maintenance.
About Unidata
A focused team with direct accountability
Unidata d.o.o. is a software engineering company based in Zagreb. We take on a limited number of concurrent projects so each gets sustained engineering attention, continuity and direct communication.
We work with clients in Croatia and abroad. Scope, responsibilities and commercial terms are defined up front, and the project is led by someone who understands both the business context and the technical decisions.
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Work directly with engineers
The people in the conversation are the people designing and implementing the solution. Fewer handoffs make decisions faster and more precise.
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Clear commercial terms
Scope, timeline, cost and responsibilities are written down before work starts and updated when requirements change.
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Built for continuity
We structure software for maintenance and further development, not just the first release.
Tell us what the system needs to do.
Send a few lines about the goal, the current environment and the main technical challenge. We’ll reply with an initial assessment, the questions that need answering and a practical next step.
[email protected]- Address
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Unidata d.o.o.
Hrvatskih iseljenika 1
10000 Zagreb, Croatia - Company information
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OIB: 83787118564
Registered office: Zagreb, Croatia -
[email protected]
We usually reply within one business day.