Marko R.
Backend & AI Engineer | Java, Spring Boot & API Integrations
I’m a Software Engineer with 4+ years of experience building backend and enterprise applications, primarily with Java and Spring Boot. My experience covers backend development, REST APIs, database design, third-party integrations, workflow automation, and AI/LLM integrations. Core skills: • Java & Spring Boot • Hibernate / JPA • REST APIs & Integrations • PostgreSQL, MySQL & SQL • AI / LLM Integrations • React & TypeScript • Apache Camel • JSON / XML • Git, Maven, Jenkins & CI/CD At Antares Vision Group, I worked on CureSync, a pharmaceutical serialization platform, where I developed backend features, integrations, and solutions for processing large volumes of data. At AIGO, I work on enterprise document management solutions, developing backend services, integrations, reporting features, and workflow automation. I also use tools like Claude and Cursor as part of my development workflow — mainly for exploring unfamiliar codebases, speeding up implementation, and solving technical problems. I’m comfortable joining an existing codebase or building a solution from scratch. I care about writing clean, maintainable code and choosing practical solutions that actually fit the project.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $6.4k
Billed in all: $6,859$6.9k
$3.2k in the last 6 months
Earnings, last 30 days
Skill rankings: #1 in 1 skill of 20
Rarest: top 3% in Apache Camel, of 36. Ranked by MRR among everyone on Upwork with the skill.
- Apache Camel36 freelancers · 🇭🇷 #1Top 3%🇭🇷#1 of 1
- Liquibase12 freelancers · 🇭🇷 #1Top 25%🇭🇷#1 of 1
- #30Cloud Development165 freelancers · 🇭🇷 #1Top 18%🇭🇷#1 of 1
- #73Hibernate677 freelancers · 🇭🇷 #1Top 11%🇭🇷#1 of 1
- #125Jenkins1,177 freelancers · 🇭🇷 #2Top 11%🇭🇷#2 of 3
- #219Spring Boot2,150 freelancers · 🇭🇷 #1Top 10%🇭🇷#1 of 5
- #462CI/CD3,691 freelancers · 🇭🇷 #4Top 13%🇭🇷#4 of 14
- #540Large Language Model2,726 freelancers · 🇭🇷 #2Top 20%🇭🇷#2 of 8