Šimun Šunjić

Available to hire

I'm a full-stack developer with thirteen years of hands-on experience in designing, building, testing, and supporting web/desktop business applications, with focus on Java (SE/EE & Spring) and Python (Generative AI,…

About

I’m a full-stack developer with thirteen years of hands-on experience in designing, building, testing, and supporting web/desktop business applications, with focus on Java (SE/EE & Spring) and Python (Generative AI, LLMs, Data Science). I have a strong background in product-oriented development with end-to-end ownership of production systems, and I enjoy turning client requirements into robust production applications.

I work with microservice architectures, AI/LLM-enabled products, and data-heavy platforms. I’m an active speaker (DSC Europe 2024) and hold a master’s degree in computer science. I thrive in collaborative teams and can contribute across architecture, implementation, and delivery to drive successful product development.

  • 13 years' experience
  • Joined January 2026

Languages

  • CroatianFluent
  • EnglishFluent

Industry experience

  • Software & Internet
  • Professional Services
  • Telecommunications
  • Media & Entertainment

More experts in Zagreb, Croatia

Work experience· 7 roles

Senior Software Engineer, Solution Architect · Atomic IntelligenceJun 2024 – Present · 2 yrs 6 mos

Lead backend and platform architecture for AI-enabled products. Designed gRPC-based microservices for metadata management across Snowflake, PostgreSQL, MySQL and MSSQL, including NL2SQL for semantic analysis and SQL query generation. Implemented data orchestration with Apache Airflow, Redis caching and event streaming, and async processing of long-running operations. Built an AI-aware data catalog with data lineage and profiling; developed DDL context generation for LLM models and end-to-end metadata orchestration.

Senior Java Developer, Solution Architect · AdcubumAug 2023 – May 2024 · 10 mos

Led backend development for insurance domain platforms with microservices, Spring-based architecture, and gRPC communication. Implemented data processing pipelines and integration with legacy systems; containerized services and orchestration in Kubernetes; contributed to architecture decisions enabling scalable, secure APIs and data flows.

Senior Java Developer, Solution Architect · ValconMar 2020 – Aug 2023 · 3 yrs 6 mos

Built enterprise Java backend microservices with Spring Boot, Spring Cloud, and data-heavy platforms. Designed system architectures, integrated streaming (Kafka) and scheduling (Airflow/Redis) components, and contributed to AI/LLM-enabled feature sets for data platforms and enterprise apps.

Senior Java Developer, Solution Architect · DeepIT d.o.oAug 2018 – Mar 2020 · 1 yr 8 mos
Java Developer, System Integrator, Solution Architect · Hrvatski Telekom d.dApr 2015 – Aug 2018 · 3 yrs 5 mos
Java Developer · Beta Tau Beta d.dNov 2013 – Apr 2015 · 1 yr 6 mos
Java Developer · Neos d.o.oSep 2012 – May 2013 · 9 mos

Education

Master of Information Sciences (mag. inf.) · Faculty of Organization and Informatics, Varaždin, Croatia2009 – 2014
Bachelor of Information Technology Engineer (bacc. ing. techn. inf) · Polytechnic of Zagreb, Zagreb, Croatia2006 – 2009
Master of Information Sciences (mag. inf.) · Faculty of Organization and Informatics, Varaždin, Croatia2009 – 2014
Bachelor of Engineering in IT Technologies; Bachelor of Information Technology Engineer (bacc. ing. techn. inf) · Polytechnic of Zagreb, Zagreb, Croatia2006 – 2009

Certifications and awards· 9

Java SE Oracle Certified Professional Java Programmer2014 – 2026
Cisco Certified Network Associate (CCNA)2009 – 2026
Linux Advanced Linux System Administration2017 – 2026
Secure Software Development2016 – 2026

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