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Davor Kljajic
Looking for a jobBackend Developer
Backend Developer at MARGINS building NestJS services and AI integrations for a social networking platform.
CroatiaBackend Developer at Margins
Experience
Backend Developer
Developed and maintained production backend services using NestJS, TypeScript, PostgreSQL, and TypeORM. Implemented REST APIs, integrations, and AI/LLM-based features.
NestJSTypeScriptPostgreSQLTypeORMREST APIsAWS SQSS3AWS Secrets ManagerLang ChainLangGraphOpenAIJestSupertestJWTStripeFirebaseGoogle APISendgridMailchimpSharpPDF ProcessingDockerGit
Backend Developer
Developed backend services and APIs for enterprise, mobile, and frontend applications. Worked directly with clients to clarify requirements and translate business needs into backend functionality.
NestJSPostgreSQLMongoDBSQLGCPGoogle Cloud FunctionsREST APIsNodeJSTypeScript
Web Developer
Developed web services and APIs for social networking projects. Worked on multiple blockchain projects, creating blockchain applications and networks, and integrated IoT with blockchain solutions.
BlockchainIoTWeb ServicesAPIsJavaScriptNodeJS
User Interface Developer
Focused on UX/UI design for social networks.
UX UI DesignSocial Networks
Education
Blockchain Hackathon in Stuttgart
Participated in the Blockchain Hackathon Stuttgart 2019, collaborating in an international team to develop a blockchain-based solution for secure transportation of dangerous goods.
Participated in the Blockchain Hackathon Stuttgart 2019, collaborating in an international team to develop a blockchain-based solution for secure transportation of dangerous goods.
Faculty of Economics in Osijek
Pursued a Master of Economics degree at the Faculty of Economics in Osijek from 2010 to 2014.
Pursued a Master of Economics degree at the Faculty of Economics in Osijek from 2010 to 2014.