Marko Perajica Email & Phone Number

Split, Split-Dalmatia, Croatia

Contributing to the development of the first Croatian invite-only NFT marketplace, bringing cutting-edge blockchain technology to the forefront of the digital art world.𝐊𝐞𝐲 𝐒𝐤𝐢𝐥𝐥𝐬:𝐒𝐦𝐚𝐫𝐭 𝐂𝐨𝐧𝐭𝐫𝐚𝐜𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Writing secure and efficient smart contracts using Solidity.𝐇𝐚𝐫𝐝𝐡𝐚𝐭 𝐄𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭: Using the Hardhat environment for rigorous testing and interaction with smart contracts.𝐄𝐯𝐞𝐧𝐭 𝐈𝐧𝐝𝐞𝐱𝐢𝐧𝐠: Indexing contract events with The Graph and creating event handlers in AssemblyScript.𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Building robust backend services using Nest.js and utilizing Prisma as an ORM for seamless database operations.𝐔𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Designing intuitive user interfaces with Next.js as a React framework.𝐂𝐮𝐬𝐭𝐨𝐦 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐈𝐧𝐝𝐞𝐱𝐞𝐫: Architecting custom blockchain indexers using the Squid Indexer API for tailored data retrieval and analytics.𝐍𝐅𝐓 𝐌𝐚𝐫𝐤𝐞𝐭𝐩𝐥𝐚𝐜𝐞: Currently working on the first Croatian invite-only NFT marketplace, demonstrating a comprehensive skill set in blockchain technology and web application development.𝐈𝐏𝐅𝐒 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Integrating the IPFS P2P network for decentralized data storage and sharing, ensuring resilient data management.

Zagreb, Croatia

Played a role in the implementation of several projects, leveraging my knowledge in Java and Kotlin with Spring Boot.𝐊𝐞𝐲 𝐒𝐤𝐢𝐥𝐥𝐬:𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 (𝐉𝐚𝐯𝐚 𝐚𝐧𝐝 𝐊𝐨𝐭𝐥𝐢𝐧): Implemented backend solutions using Java and Kotlin, with a strong focus on Spring Boot, ensuring robust and high-performance server-side applications.𝐃𝐚𝐭𝐚 𝐏𝐞𝐫𝐬𝐢𝐬𝐭𝐞𝐧𝐜𝐞: Persisted data between applications and databases using JPA and JDBC, ensuring efficient data storage and retrieval.𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐕𝐞𝐫𝐬𝐢𝐨𝐧𝐢𝐧𝐠 𝐚𝐧𝐝 𝐌𝐢𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Utilized Flyway for database versioning and migration, ensuring smooth and controlled database schema changes.𝐁𝐮𝐢𝐥𝐝 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: Used Gradle as a build tool, with knowledge in both Groovy and Kotlin syntax, streamlining the build and deployment processes.𝐑𝐞𝐚𝐥-𝐭𝐢𝐦𝐞 𝐀𝐏𝐈 𝐃𝐞𝐬𝐢𝐠𝐧: Designed real-time APIs with the Vert.x reactive web server, enabling efficient and responsive communication between applications.𝐌𝐞𝐬𝐬𝐚𝐠𝐞 𝐒𝐭𝐫𝐞𝐚𝐦𝐢𝐧𝐠: Streamed messages between services using Kafka, facilitating real-time data flow and communication within distributed systems.𝐂𝐈/𝐂𝐃 (𝐂𝐨𝐧𝐭𝐢𝐧𝐮𝐨𝐮𝐬 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧/𝐂𝐨𝐧𝐭𝐢𝐧𝐮𝐨𝐮𝐬 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭): Implemented CI/CD pipelines with tools like TeamCity and Jenkins, ensuring automated and reliable software delivery.𝐈𝐨𝐓 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧: Used PubNub as a communication layer between applications and IoT devices, enabling seamless connectivity and data exchange.𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐌𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠: Monitored applications using AWS CloudWatch, with experience in storing critical data on S3 cloud storage for in-depth analysis and performance optimization.

Had a role in a project aimed at ensuring data validity and security through digital signatures.𝐊𝐞𝐲 𝐒𝐤𝐢𝐥𝐥𝐬:𝐌𝐢𝐜𝐫𝐨𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬: Used Java and Spring Boot, contributing to the creation of a scalable and efficient backend infrastructure.𝐒𝐩𝐫𝐢𝐧𝐠 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐚𝐧𝐝 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧: Implemented authentication and authorization functionalities using Spring Security, enhancing data access control through JWT tokens.𝐒𝐒𝐋 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐞 𝐈𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧: Successfully implemented HTTPS using SSL certificates, bolstering data encryption and securing communication channels.𝐃𝐨𝐜𝐮𝐦𝐞𝐧𝐭 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐢𝐭𝐲 𝐀𝐬𝐬𝐮𝐫𝐚𝐧𝐜𝐞: Employed various technologies, including X509 certificates, SHA-256 hashing, and AES/RSA cryptography, to ensure document authenticity and security, employing Base64 and Base58 encoding algorithms for data integrity.𝐈𝐧-𝐌𝐞𝐦𝐨𝐫𝐲 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: Optimized data storage and retrieval by working with H2 and RocksDB in-memory databases, enhancing overall application performance.𝐈𝐏𝐅𝐒 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Integrated the IPFS P2P network for decentralized data storage and sharing, ensuring resilient data management.𝐏𝐫𝐢𝐯𝐚𝐭𝐞 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐍𝐞𝐭𝐰𝐨𝐫𝐤: Successfully set up a private blockchain network using the Hyperledger Besu Ethereum client, ensuring secure and controlled blockchain operations.𝐒𝐦𝐚𝐫𝐭 𝐂𝐨𝐧𝐭𝐫𝐚𝐜𝐭 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭: Utilized the Truffle Suite for debugging and deploying smart contracts to blockchain networks, ensuring reliable contract execution.𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐃𝐞𝐯𝐎𝐩𝐬: Streamlined deployment processes by writing Docker configuration files, configuring Nginx as a proxy server, and implementing CI/CD pipelines with Jenkins. I also utilized the Nexus repository for artifact storage.

Master Of Science In Electronics And Computer Engineering

Bachelor Of Engineering - Be, Bachelor Of Electrical Engineering And Information Technology