Slice is dedicated to helping independent pizzerias compete with big pizza chains by offering simple online ordering technology, personalized in–store marketing, and customized digital ads.

Main responsibilities:

• Integrating Auth0 as an identity provider for the consumers (end users) of the platform
• Extracting a new user-service for all the user-related data and business logic, from the old, monolithic application; My team owned the full lifecycle of the new service - everything from investigation, planning, implementation, data migration, monitoring and alerting, on-call rotations

Technologies: Ruby, Rails, Python, Flask, JavaScript, Node.js, PostgreSQL, RabbitMQ, Docker, GitLab CI/CD, AWS (API Gateway, Lambda, DynamoDB), Terraform, Auth0, Cloudflare, Datadog

Introducing Blockchain with Java: Program, Implement and Extend Blockchains with Java is a book that teaches you step by step how to create your own cryptocurrency by implementing blockchain technology using Java.

Main responsibilities:

• Technical reviewer for the book
• Code reviewer for the accompanying code

Technologies: Java, JavaFX, SQLite

H4 - A contract lifecycle management platform, transforming how contracts are negotiated, data is captured, and content is understood.

Main responsibilities:

• Development and maintenance of the Authentication, Authorization and Access Control system of the platform
• Planning and prioritisation of tasks on weekly and quarterly basis
• Coordination and cooperation with the other team leads / teams

Technologies: TypeScript, Node.js, React, PostgreSQL, Docker, Concourse CI, AWS (AWS CDK, Cognito, DynamoDB, S3)

Game Publishing Platform - A web based platform for complete management of games (building and releasing a game for different platforms, management of already released game versions, management of ads and different ad providers, management of in-app promotions of other TabTale games, A/B testing for different ad settings etc.)

Main responsibilities:

• Development, maintenance and deployment of the Game Publishing Platform, both the backend services and the frontend
• Managing and improving the ETL process - processing events generated by the clients (mobile apps), extracting data and transforming it to meet the needs of the business intelligence team
• Supporting the QA team with test automation

Technologies: Java, Spring (Spring Boot, Spring Data), JavaScript, AngularJS, MySQL, MongoDB, AWS (Lambda, S3, ElasticBeanstalk, DynamoDB, Kinesis, Athena, API Gateway, CloudWatch, SNS, X-Ray), Serverless Framework, Python, Jenkins

Java Basic Course - A five-week introductory course to Java.

Main responsibilities:

• Teaching the course content
• Preparing accompanying exercises
• Preparing and examining tests

Technologies: Java

UGT platform - A specialized platform for sport betting.

Main responsibilities:

• Diagnosing and resolving the problems the system initially had regarding multithreading
• Redesign of the existing architecture and database schema to satisfy the new requirements of the project
• Design and development of a web interface and backend services for mapping data received from external sources into the system’s internal data
• Coaching junior colleagues

Technologies: Java, Spring (Spring Boot, Spring Data), Akka, MySQL, MongoDB, RabbitMQ, Jenkins

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AND System - National Traffic Police (Ministry of Interior of Bulgaria)

Main responsibilities:

• Refactoring the system from the Struts framework to the Spring framework

Technologies: Java, Struts, Spring

3-D Secure Services - The 3-D Secure standard enhances security for online credit card payments.

Main responsibilities:

• Maintenance of the 3-D Secure services for current customers and integrating them for new ones
• End-to-end testing when integrating the services for new customers
• Developing simulators, to simulate third-party services which are not accessible from the test environment

Technologies: Java, Spring, OracleSQL, Jenkins, Selenium

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Healthbank - A platform on which people can upload and exchange their medical data.

Main responsibilities:

• Development of REST backend services
• Maintenance of existing code base
• Unit testing, JMeter load testing

Technologies: Java, Spring, Hibernate, MariaDB, Jenkins, Postman, JMeter

Cardiologie Centra Nederland - Web based medical software for the Dutch Healthcare Industry.

Main responsibilities:

• Development of new features
• Maintenance of existing code base
• Unit testing, Selenium testing

Technologies: Java, Servlets, JSP, DB2, Selenium

Pharmaceutical Chamber of Macedonia - A custom CMS solution for the PCM.

Main responsibilities:

• Design and implementation of new features
• Maintenance of the existing code base
• Manual end-to-end testing of new features

Technologies: Python, Flask, MySQL

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Open Educational Resources - A wordpress plugin for uploading, management and searching for open educational resources.

Main responsibilities:

• Design and implementation of the Wordpress plugin
• Communication with the client

Technologies: Wordpress, PHP, MySQL

TimeMK Archive - An archive of articles that indexes many of Macedonia’s news websites and portals.

Main responsibilities:

• Development of web crawlers, parsers and a search engine for the archive

Technologies: Python, MongoDB