Mario Katalinic
Mario Katalinic

Integration and IoT Engineer

Open to offers · Member since 22 Aug 2026
Message
Location
Zagreb, Croatia
Desired salary
Unspecified
Work preference
Remote Only / Full Time, Freelance
Experience level
Mid

About

Professional summary

I am an Integration and IoT Engineer with hands-on experience delivering enterprise software implementations, backend systems, API integrations, and connected IoT solutions. I work across the full delivery lifecycle, from requirements analysis and solution design to configuration, deployment, and post-go-live support.

I build backend and integration solutions using Python, FastAPI, JavaScript, REST APIs, JSON, SQL, PostgreSQL, Apache Kafka, MQTT, and Linux. I am comfortable translating business, operational, and compliance requirements into scalable technical implementations.

In my current implementation role, I lead client platform implementations and work closely with stakeholders, administrators, and engineering teams. I define technical specifications, configure backend systems, implement API-driven integrations, and support production optimization and troubleshooting.

I am also developing an end-to-end smart waste management IoT platform that connects edge devices, MQTT messaging, backend services, databases, and a web application. This project has strengthened my experience in device data ingestion, real-time communication, JWT-secured APIs, analytics, mapping, and role-based access control.

My background also includes project management, technical documentation, client communication, infrastructure support, and technical translation for IT, software, and telecommunications clients. I am continuing to expand my expertise in Linux, containerization, DevOps, cloud-native systems, and platform engineering.

Notice period: 1 month

Skills

45 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Implementation Specialist / Solution Architect Thentia

Lead end-to-end implementations of cloud-based client platforms, covering solution design, configuration, stakeholder coordination, and alignment with business and compliance requirements.

Develop and maintain backend and integration logic using JavaScript, REST APIs, and JSON. Define technical specifications, configure API-driven solutions, and provide post-deployment optimization, troubleshooting, and guidance alongside engineering teams and client administrators.

IoT Implementation Specialist Omega-Software

Designed and deployed IoT solutions using PostgreSQL, Cassandra, and Apache Kafka to support real-time data processing.

Configured and calibrated IoT devices according to client technical and operational requirements. Collaborated with developers and project managers on implementations, troubleshooting, and problem resolution.

Technical Department Assistant Bina-Istra

Supported infrastructure projects through documentation control, reporting, regulatory alignment, and internal IT and administrative support.

Monitored Environmental and Social Action Plans and Stakeholder Engagement Plans to support sustainability and accountability. Assisted with feasibility studies and presentations.

Project Manager International NGO

Managed construction, social inclusion, and publishing projects, including budgeting, reporting, and stakeholder communication.

Coordinated workshops, campaigns, and multilingual publications for diverse communities. Translated and localized content to ensure culturally accurate communication.

IT and Technical Translator Crotext & Freelance

Provide technical translation and localization services for IT, software, and telecommunications content.

Worked with clients including T-Mobile, Visa, and Oracle, specializing in technical terminology and multilingual localization.

Education

Learning history

VERN’ University of Applied Sciences

BSc, Internet of Things and Computing

univ. bacc. ing. comp. Coursework included IoT systems, embedded and distributed systems, networking, SQL/NoSQL databases, operating systems, electronics, and systems security. GPA: 4.8 / 5.0.

TVZ Lifelong Learning Programme

Professional Training, Python, Linux and Containers

20 ECTS programme focused on Python-based application development, Linux systems, containerization, and IT operations.

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