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Location

Poland

Rate

$35  / per hour

Years of experience

10+

About

I am a versatile Full Stack Engineer with extensive experience in both back-end and front-end technologies. At OLX Group, I have been working on serverless development using Kotlin and Go, creating a statistics service based on DynamoDB, Go, and AWS Lambda. Additionally, I have been responsible for migrating old UI components from JQuery and JavaScript to React, TypeScript, and Next.js, as well as maintaining a monolith application built with PHP 7. My role involves ensuring the smooth operation and modernization of complex systems, leveraging my skills in Java, Kotlin, and frontend development. Prior to OLX Group, I worked at Epam Systems in Wroclaw and Gdansk, where I refactored legacy applications into new architectures, created independent micro-services, and administered Kubernetes clusters. I developed frameworks for scraping development packages and reporting new endpoints, and I played a key role in full stack development projects using React, Redux, and Spring Boot. My career began at Kainos Poland, where I developed B2B platforms, created and maintained microservices, and performed frontend development with AngularJS and CSS. I also have experience as a Test Engineer, designing and writing test automation scripts and conducting performance testing with JMeter. My educational background includes a Bachelor's degree in Business Administration from Universidad de Salamanca, and I hold certifications in AWS Solutions Architecture, Docker, and Prince2 Foundation.

Tech Stack

Java, Git, Gradle, JUnit Testing Framework, Kotlin, Spring Framework

Experience

  • Serverless Development: Developing serverless applications using Kotlin and Go, and creating statistics services based on DynamoDB, Go, and AWS Lambda at OLX Group.
  • UI Migration: Migrating old UI components from JQuery and JavaScript to React, TypeScript, and Next.js to modernize the user interface at OLX Group.
  • Microservices Creation and Maintenance: Creating and maintaining small-scale independent microservices, serving as facades between old APIs and new microservices using Java 8, Kotlin, and Spring Boot at Epam Systems.
  • Full Stack Development: Performing full stack development with React, TypeScript, SASS, and Spring Boot, and developing user-facing applications and account management systems at Epam Systems.
  • Kubernetes Administration: Administering Kubernetes clusters, specifically AKS (Azure Kubernetes Service), to manage containerized applications at Epam Systems.
  • Testing and Debugging: Designing and writing test automation scripts in Java and Python, extending test automation frameworks, and conducting performance testing with JMeter at Kainos Poland.
  • Legacy System Refactoring: Refactoring legacy applications into new architectures, improving system performance and maintainability at Epam Systems.

Employment history

Full Stack Developer, OLX GROUP, Warsaw January 2020 — Present

• Serverless development ( Kotlin / Go )
• Creation of statistics service based on DynamoDB / Go / AWS Lambda
• Migration of old UI JQuery / JS to React / TS / NextJS
• Maintenance of the monolith app ( PHP 7 )

Full-Stack Software Developer, Epam System Sp. z o.o., Wroclaw July 2018 — January 2020

• Refactoring of the legacy application into the new architecture
• Creation small-scale independent micro-services that serve as facades between old API and new micro-services ( Java 8/ Kotlin / Springboot )
• Creation of framework for scrapping development packages and reporting / documenting new endpoint creation
• Kubernetes cluster administration (AKS)

Stack ( Java / Kotlin / RxJava, React, SpringBoot )

Software Developer, Epam System Sp. z o.o., Gdansk July 2017 — July 2018

• Creation of micro-services responsible for communication between hardware and legacy application
• Full stack development React / TS / SASS & Springboot (Java 8)
• Creation of the user-facing application for placing bets (React / Redux)
• Creation of user account management application (React / Redux)

Junior Software Developer, Kainos Poland Sp. z o.o, Gdansk October 2016 — June 2017

• B2B platform development for Lufthansa
• Creation and maintenance of microservices based on Spring Framework
• Frontend development (AngularJS / CSS)
• Debugging and profiling performance issues

Test Engineer, Kainos Poland sp. z o.o, Warszawa June 2014 — September 2016

• Designing and writing test automation scripts / tests ( Java / Python )
• Using / extending test automation frameworks ( Cucumber / JUnit4 )
• Performance testing ( JMeter )
• Working with POs and software developers to pinpoint bugs and software performance issues

Education history

Universidad de Salamanca, Salamanca, Spain September 2005 — July 2009 Bachelor of Business Administration, Universidad de Salamanca, Salamanca, Spain
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