Plantix helps farmers diagnose and treat crop problems, improve productivity and provide farming knowledge.

Main responsibilities:

• Support the B2B team in refining software development practices
• Redesigned the disease notification system from pull-based to push-based, reducing service requests and cutting AWS costs significantly
• Migrated services from Flask to FastAPI and created a FastAPI boilerplate template for future development
• Developed new backend services, maintained existing ones, and decommissioned legacy systems, reducing complexity and contributing to AWS cost savings
• Standardized GitHub workflows for backend services
• Designed and managed infrastructure using Terraform
• Integrated our system with the ONDC network, implementing a synchronous API for our mobile app atop their asynchronous protocol
• Contributed to the recruitment process for new candidates

Technologies: Python, Flask, FastAPI, PostgreSQL, Redis, Kafka, Docker, GitHub workflows, AWS (ECR, ECS, RDS), Terraform, Sentry, JavaScript, TypeScript, Node.js

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:

• Integrated Auth0 as the identity provider for platform end users
• Extracted a new user service for user-related data and business logic from the monolithic application, led the full lifecycle of the service, including investigation, planning, implementation, data migration, monitoring, alerting, and on-call rotations

Technologies: Ruby, Rails, Python, Flask, JavaScript, Node.js, PostgreSQL, RabbitMQ, Docker, GitLab, AWS (API Gateway, Lambda, DynamoDB), 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:

• Served as a technical reviewer for the book
• Reviewed the code for the accompanying materials

Technologies: Java, JavaFX, SQLite

H4 is a digital platform transforming the documentation that underpins global financial markets and legal contracts.

Main responsibilities:

• Developed and maintained the platform's Authentication, Authorization, and Access Control system
• Planned and prioritized tasks on a weekly and quarterly basis
• Coordinated and collaborated with other team leads and teams

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

Game Publishing Platform is a web-based solution for managing games, including building and releasing games for various platforms, handling released versions, managing ads and providers, overseeing in-app promotions for other TabTale games, and conducting A/B testing for ad settings.

Main responsibilities:

• Developed, maintained, and deployed the Game Publishing Platform, including both backend services and frontend
• Managed and improved the ETL process, handling events from mobile app clients, extracting and transforming data to support the business intelligence team
• Supported the QA team by implementing 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 Basics Course – a five-week introduction to Java.

Main responsibilities:

• Taught the course content
• Prepared supplementary exercises
• Prepared and graded tests

Technologies: Java

United Game Tech is a specialized platform for sports betting.

Main responsibilities:

• Diagnosed and resolved the system's initial multithreading issues
• Redesigned the architecture and database schema to meet the project's new requirements
• Designed and developed a web interface and backend services to map data from external sources into the system's internal format
• Mentored 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:

• Migrated 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:

• Maintained 3-D Secure services for existing customers and integrated them for new clients
• Conducted end-to-end testing for service integrations with new customers
• Developed simulators to mimic third-party services not accessible in the test environment

Technologies: Java, Spring, Oracle Database, Jenkins, Selenium

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Healthbank is a people-owned platform that allows users to securely manage, share, and earn rewards from their health data.

Main responsibilities:

• Developed REST backend services
• Maintained the existing codebase
• Performed unit testing and load testing

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

Cardiologie Centra Nederland is a web-based medical software for the Dutch Healthcare Industry.

Main responsibilities:

• Developed new features
• Maintained the existing codebase
• Performed unit and end-to-end testing

Technologies: Java, Servlets, JSP, DB2, Selenium

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

Main responsibilities:

• Designed and implemented new features
• Maintained the existing codebase
• Conducted manual end-to-end testing of new features

Technologies: Python, Flask, MySQL

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Open Educational Resources is a wordpress plugin for uploading, management and searching for open educational resources.

Main responsibilities:

• Designed and implemented the WordPress plugin
• Communicated with the client

Technologies: Wordpress, PHP, MySQL

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SoundTribeLive is an Android application for event engagement, promotion, event video streaming and promotion of event related accessories.

Main responsibilities:

• Implemented the Android application
• Tested the application on various devices

Technologies: Android, Java, SQLite

TimeMK Archive is an archive of articles, that indexes all of Macedonia’s news websites and portals.

Main responsibilities:

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

Technologies: Python, MongoDB