Łukasz Ziaja
Software Engineer
About Me
Experienced Software Engineer adept in bringing forth expertise in design, delivery, testing, and maintenance of software systems. Proficient in Java and related technologies, able to effectively self-manage during independent projects, as well as collaborate as part of a productive team.
Experience
OLX Group
- Integrated OLX Payments with payment service providers in Latin America, enhancing the payment processing efficiency and reducing transaction failures by 20%.
- Created backend solution for OLX KYC process, improving customer verification time by 30%.
- Acted as a KYC domain expert, contributing to the overall evolution of the platform, leading to a 15% increase in platform stability and performance.
Technologies used: Kotlin, Spring Boot, PostgreSQL, AWS, Kubernetes, Docker, Java, J2EE, Hibernate, Maven, Jenkins, RESTful APIs, Microservices, JUnit, Mockito, IntelliJ IDEA.
- Added circuit breaking and optimized cache in internal media hosting service, resulting in a 25% reduction in downtime and a 40% improvement in response time.
Technologies used: Kotlin, Spring Boot, PostgreSQL, AWS, Kubernetes, Docker, Java, J2EE, Hibernate, Maven, Jenkins, RESTful APIs, Microservices, JUnit, Mockito, IntelliJ IDEA.
Atos
- Created applications optimizing real-estate lease management processes, reducing lease processing time by 50% and increasing accuracy by 35%.
Technologies used: Angular, Java, PostgreSQL, Spring Boot, Hibernate, Maven, Jenkins, RESTful APIs, Servlets, JUnit, Mockito, IntelliJ IDEA
Certifications
Languages
Polish - Native
English - C1
German - B1
Skills
- Languages
- Kotlin - Java
- Frameworks
- Vert.x - Spring Boot - HTTP4KExposed - JDBI
- Testing
- JUnit - Mockito - MockkTestContainers - Localstack
- Programming & Systems
- Git - Docker - KafkaLinux
- Cloud
- AWS - Kubernetes - TerraformNew Relic - Grafana - Prometheus
Education
Opole University of Technology
Bsc. Computer Science2014 - 2018