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Petar Nojner

@petarnojner

Technical Lead at Hooloovoo who delivered backend features enabling new enterprise clients and built a pet hotel booking application.

Serbia

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At Hooloovoo, I lead and mentor a cross-functional team working on Letzz.io. I architected and delivered backend features that enabled new enterprise clients, and I investigate LLM solutions and costs.

Previously, at Hooloovoo, I designed a high-throughput service for betting events using Kafka Streams and developed a PDF generation service that stored files in AWS S3. I also served as an Incident Manager and took ownership of QA automation during critical project phases.

At HTEC Group, I led backend development of a text-analysis engine that parsed and scored content against business rules. I also used AWS services to build, deploy, and maintain cloud-native microservices.

I founded FurLand and single-handedly developed a web and mobile application for pet hotel bookings. I designed its reservation and availability algorithm for multiple vendors.

Experience

Work history, roles, and key accomplishments

Current

Technical Lead & Full-Stack Developer

Current

Hooloovoo

Feb 2022 - Present (4 years 8 months)

Lead and mentor a cross-functional team of 7, fostering a collaborative culture through Agile ceremonies. Architected and delivered critical backend features enabling acquisition of new enterprise clients, working with LLM models.

Java Spring Boot React TypeScript NodeJS Python Kafka AWS Agile Leadership Mentorship LLM

Founder & Lead Developer

FurLand

Aug 2024 - Mar 2025 (7 months)

Conceptualized, architected, and single-handedly developed a full-stack web and mobile application for pet hotel bookings. Designed a complex booking algorithm and led all business and marketing operations.

Next.js React Fullstack Development Mobile Development Booking Algorithm Marketing Business Operations

Backend Lead & Medior Engineer

HTEC Group

Jan 2021 - Feb 2022 (1 year 1 month)

Led backend development of a text-analysis engine that parsed and scored content. Mentored junior developers, conducted code reviews, and managed task allocation in a Kanban workflow.

Java Spring Boot Python NodeJS JavaScript AWS EC2 S3 ECR CodeBuild CI CD Microservices Kanban Mentorship

Junior Software Engineer

NetSeT

Dec 2019 - Dec 2020 (1 year)

Developed and maintained features for a critical legacy system handling sensitive citizen data for passports and ID cards. Implemented a key feature for ID card generation and handled on-site deployment and client communication.

Java JavaScript Legacy Systems Deployment Client Communication

Internship + Junior Software Engineer

Gnation

Jun 2018 - Dec 2019 (1 year 6 months)

Developed a social network from the beginning, gaining soft and tech skills from experienced developers. Worked with Neo4J for social media relations and presented products to stakeholders weekly.

Java Spring Boot React NodeJS JavaScript HTML CSS Neo4j Presentation Skills

Full-Stack Developer

Kindred

Designed and implemented a high-throughput service for processing betting events using Kafka Streams. Developed a document generation service for PDFs stored in AWS S3, and served as Incident Manager using Splunk and Grafana.

Java Spring Boot React TypeScript NodeJS Python Kafka S3 Splunk Grafana Selenium Cypress Incident Management Mentorship

Education

Degrees, certifications, and relevant coursework

School of Electrical Engineering, University of Belgrade

Bachelor of Science, Computer Science

2015 - 2020

Bachelor of Science in Computer Science. Thesis investigated and implemented a scalable microservice architecture for a proof-of-concept video streaming platform.