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I'm Boris Pengili, a Senior Java Backend Engineer & Team Leader with 8+ years of experience delivering scalable backend solutions. I specialize in Java 17, Spring Boot, and JPA/Hibernate, with hands-on experience in microservices, event-driven architectures using Apache Kafka, and working with PostgreSQL, ClickHouse, MongoDB, and Elasticsearch. I also leverage Hazelcast for caching, WebSocket for real-time features, and CI/CD practices in GitLab to drive reliable releases. I enjoy mentoring teams, conducting code reviews, and designing scalable features across distributed systems. My track record includes leading high-performance crawling and data integration projects, coordinating cross-functional teams, and translating business goals into robust, maintainable software while prioritizing quality and performance.…I'm Boris Pengili, a Senior Java Backend Engineer & Team Leader with 8+ years of experience delivering scalable backend solutions. I specialize in Java 17, Spring Boot, and JPA/Hibernate, with hands-on experience in microservices, event-driven architectures using Apache Kafka, and working with PostgreSQL, ClickHouse, MongoDB, and Elasticsearch. I also leverage Hazelcast for caching, WebSocket for real-time features, and CI/CD practices in GitLab to drive reliable releases. I enjoy mentoring teams, conducting code reviews, and designing scalable features across distributed systems. My track record includes leading high-performance crawling and data integration projects, coordinating cross-functional teams, and translating business goals into robust, maintainable software while prioritizing quality and performance.

Boris Pengili

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I'm Boris Pengili, a Senior Java Backend Engineer & Team Leader with 8+ years of experience delivering scalable backend solutions. I specialize in Java 17, Spring Boot, and JPA/Hibernate, with hands-on experience in microservices, event-driven architectures using Apache Kafka, and working with PostgreSQL, ClickHouse, MongoDB, and Elasticsearch. I also leverage Hazelcast for caching, WebSocket for real-time features, and CI/CD practices in GitLab to drive reliable releases. I enjoy mentoring teams, conducting code reviews, and designing scalable features across distributed systems. My track record includes leading high-performance crawling and data integration projects, coordinating cross-functional teams, and translating business goals into robust, maintainable software while prioritizing quality and performance.…I'm Boris Pengili, a Senior Java Backend Engineer & Team Leader with 8+ years of experience delivering scalable backend solutions. I specialize in Java 17, Spring Boot, and JPA/Hibernate, with hands-on experience in microservices, event-driven architectures using Apache Kafka, and working with PostgreSQL, ClickHouse, MongoDB, and Elasticsearch. I also leverage Hazelcast for caching, WebSocket for real-time features, and CI/CD practices in GitLab to drive reliable releases. I enjoy mentoring teams, conducting code reviews, and designing scalable features across distributed systems. My track record includes leading high-performance crawling and data integration projects, coordinating cross-functional teams, and translating business goals into robust, maintainable software while prioritizing quality and performance.

Available to hire

I’m Boris Pengili, a Senior Java Backend Engineer & Team Leader with 8+ years of experience delivering scalable backend solutions. I specialize in Java 17, Spring Boot, and JPA/Hibernate, with hands-on experience in microservices, event-driven architectures using Apache Kafka, and working with PostgreSQL, ClickHouse, MongoDB, and Elasticsearch. I also leverage Hazelcast for caching, WebSocket for real-time features, and CI/CD practices in GitLab to drive reliable releases.

I enjoy mentoring teams, conducting code reviews, and designing scalable features across distributed systems. My track record includes leading high-performance crawling and data integration projects, coordinating cross-functional teams, and translating business goals into robust, maintainable software while prioritizing quality and performance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Work Experience

Lead Java Back-end Developer at XPLN

August 1, 2022 - October 30, 2025

Led development of high-performance crawling and scraping solutions for large-scale product data. Designed and implemented a standalone service to aggregate data from 20+ platforms (eBay, Amazon, Google, etc.) using multithreading, storing results in ClickHouse, and implementing change tracking for historical analysis. Conducted code reviews, guided feature delivery, and improved scalability and performance across distributed systems. Resolved Kafka processing bottlenecks and collaborated with data engineering, QA, and product teams.

Java Back-end Developer at Surest

May 1, 2023 - May 1, 2023

Implemented and documented features to enhance product functionality; resolved complex bugs including time synchronization and Kafka overload; optimized application performance and reliability; contributed to QA test cases; collaborated with cross-functional teams to deliver high-quality solutions.

Java Back-end Developer, Team & Project Lead at WOLFSWAGEN (LHIND)

April 1, 2022 - April 1, 2022

Led design and development of the Duty Roster HR system; wrote code, designed architecture and DB structures, guided team, assigned tasks, coordinated with QA and stakeholders to ensure timely and quality delivery.

Java Back-end Developer at Lufthansa Industry Solutions

January 1, 2021 - January 1, 2021

Developed and maintained services to synchronize Codebeamer with Jira via Kafka; implemented REST APIs; ensured data consistency and history tracking; added retry and error handling; improved performance for processing large numbers of tickets.

Java Back-end Developer at AIRLINES (LHIND)

March 1, 2021 - March 1, 2021

Worked on myIDTravel application for airline employees; fixed bugs and performed regular maintenance to ensure smooth operation.

Java Back-end Developer, Android Developer at Albania Government (DEV.AL)

September 1, 2019 - September 1, 2019

Developed backend services and Android apps for health and police projects; included scheduling appointments, patient records access, and other workflow-driven features.