Vitold Radkevich

About me

Calculation experience in progress:

My technical skills:

Backend: Java, Kotlin, Spring (Core, Boot, MVC, Data, Security, Cloud)

Frontend: React, JavaScript, TypeScript, Vue.js, HTML, CSS, Bootstrap

Databases: PostgreSQL, MySQL, MongoDB, MsSQL, Hibernate

Cloud: AWS (EC2, Beanstalk, Lightsail, ASG, ELB, VPC, RDS, S3, SNS, SQS, Aurora, CloudFront, IAM, CloudWatch, CloudFormation, API Gateway, Route53, Certificate Manager, Cognito, Lambda, DynamoDB), Azure

Testing: JUnit, Mockito

Software Architectures & DevOps: REST, deploying infrastructure in AWS, Microservices (message queuing, API gateway, service discovery, load balancing, centralized configurations, tracing and logging, containerization), RabbitMQ, Kafka, Docker, Kubernetes (K8s), Docker Compose, CI/CD (Jenkins)

Version control: GitHub, Bitbucket, GitLab

I have created projects from scratch and successfully launched them into production

Experienced in the international software development teams (up to 12 persons) based on Agile methodology

AWS certified

Career Essentials in Generative AI by Microsoft and LinkedIn

Languages:

English - B2

Polish - B2

Russian - native speaker

Hobbies:

I love an active lifestyle (skiing, hiking, swimming, cycling, basketball, traveling)

I am passionate about cars and technologies

Certifications

Commercial projects

Project 8

Project 7

Project 6

Project 5

Project 4

Project 3

Project 2

Project 1

Contact Me

Roles	Back-end developer
Team	9 members (7 programmers, tech lead, 1 project manager)
Technologies	Spring, Microservices, Hibernate, Git, JUnit, MongoDb, DynamoDb, MySQL, Stripe, AWS, Docker
Responsibilities	Designed and developed a module for integrating with the Odoo system using microservices architecture Built and maintained microservices with Java Configured and managed MongoDB with AWS MongoDB Atlas Integrated AWS SQS for messaging and AWS SNS for notifications Developed RESTful APIs Tested and debugged the integration module Coordinated with cross-functional teams for deployment
Duration	4 months

Roles	Back-end developer/Tech Lead/DevOps
Team	6 members (3 programmers, 1 qa, 1 project manager, 1 ba)
Technologies	Spring, Hibernate, Git, JUnit, MySQL, MailJet, Stripe, AWS, Google API, JasperReports, GoDaddy
Responsibilities	Designed and developed a comprehensive project from scratch, including detailed UML diagrams and database schemas to outline the system's structure and data flow. Created and implemented APIs for calculating business parameters, including processing large Excel datasets with over 140,000 records and efficiently storing data in the database. Set up and configured AWS services including EC2, ASG, ELB, S3, Route 53, CloudFront, Beanstalk, VPC, and RDS for full project deployment and management. Oversaw the setup, maintenance, and support of test and production environments to ensure reliable deployment and operation of the application. Led technical discussions and decisions, guiding the development team through architectural and operational challenges. Collaborated with developers, QA engineers, and other stakeholders to align on project goals and deliverables. Monitored system performance, making necessary adjustments to optimize reliability and efficiency.
Duration	12 months

Roles	Back-end developer/DevOps
Team	6 members (4 programmers, 1 qa, 1 project manager)
Technologies	Spring MVC, Spring, JPA, Hibernate, Git, JUnit, MySQL, MailJet, Gradle, Google API, JasperReports, Zapier API, Ionos, Tomcat
Responsibilities	Rewrote the project from scratch, focusing on designing the new architecture and hosting it, transitioning from the old system that used Spring MVC with an embedded React app to a separate Spring REST API and a standalone React front end. Designed and implemented a new architecture, ensuring clear separation between the backend API and the frontend application to improve maintainability and scalability. Managed the hosting and deployment of the application, including setting up and configuring servers and environments to ensure stable and reliable operation. Oversaw the setup, maintenance, and support of test and production environments, ensuring that the application runs smoothly in both environments and handling any issues that arise. Collaborated with frontend developers to ensure seamless integration between the backend API and the frontend application, providing technical support and resolving integration issues. Provided technical leadership and guidance throughout the project, ensuring adherence to best practices and supporting the development team in achieving project goals.
Duration	12 months

Roles	Back-end developer
Team	15 members (10 programmers, 2 qa, 1 ba, tech lead, project manager)
Technologies	Kotlin, Spring, JPA, Hibernate, Rabbit MQ, BitBucket, JUnit, MySQL, Microservices, Jenkins, Sonar
Responsibilities	Provided ongoing project support: Addressed and resolved bugs and issues throughout the development and deployment phases, ensuring smooth operation and minimal disruption. Implemented new functionalities: Developed and integrated new features to enhance the system's capabilities and meet evolving requirements, improving overall performance and user satisfaction. Ensured comprehensive module test coverage: Utilized JUnit to write and execute unit tests, ensuring that all modules are thoroughly tested and reliable before deployment. Maintained high code quality: Adhered to best practices in coding, conducted regular code reviews, and used Sonar to monitor and improve code quality.
Duration	6 months

Roles	Full stack developer
Team	12 members (8 programmers, 1 qa, 2 ba, project manager)
Technologies	Spring, JPA, Hibernate, Rabbit MQ, Git, JUnit, MsSQL, Microservices, Jenkins, AWS, GraphQL, React
Responsibilities	Developed parcel delivery module by designing and implementing a feature for parcel management with AliExpress integration. Configured system connections and managed component connections for seamless integration. Architected system by designing and optimizing architecture for performance and scalability. Created new microservice using Spring, JPA, and Hibernate to build and deploy services. Fixed front-end bugs in the React-based user interface. Conducted unit testing with JUnit to ensure functionality. Automated CI/CD processes with Jenkins for build, test, and deployment.
Duration	4 months