What I did

• Architected the Qaron test management platform from greenfield design through to client deployment.
• Reactive Java microservices (Spring WebFlux) with gRPC communication between services.
• Golang orchestration layer that automates deployment to Kubernetes, Docker and OpenShift.
• GraphQL federation gateway with real time subscriptions, plus Netflix DGS GraphQL to gRPC integration.
• Angular frontend on NgRx Signal Store and PrimeNG, with dynamic test scheduling on GitLab CI/CD.
• Full observability stack (Loki, Grafana, Prometheus) and a high performance Rust service ingesting logs and metrics into ClickHouse.
• AI assisted test generation from business requirements, with code validation at merge request level and a human in the loop.

Impact

• Delivered a production grade enterprise platform at startup velocity.
• Architecture documented with the C4 model and adopted across platform modules.
• Led a three person core team building 13+ microservices with shared standards and patterns.

Technologies

Java, Kotlin, Spring WebFlux, Go, Python, Rust, gRPC, GraphQL, Angular, NgRx, RxJS, TypeScript, PrimeNG, Sass, Tailwind CSS, Kubernetes, OpenShift, Docker, Harbor, Terraform, Helm, Argo CD, HashiCorp Vault, PostgreSQL, ClickHouse, RabbitMQ, MinIO, Loki, Grafana, Prometheus, Traefik, Keycloak

What I did

• Complete booking flow with real time availability and a responsive Angular (Material) frontend.
• Multiple payment gateways: TatraPay, CardPay and GooglePay, plus GoSMS for SMS confirmations.
• GCP Directions API for route optimization and pricing, GCP Places API for location autocomplete.
• Firebase push notifications for booking updates, Django REST backend with async task processing.
• PDF generation for invoices and booking confirmations, and MJML email templates.

Impact

• Shipped a complete end to end platform solo, from requirements to deployment.
• Integrated 6+ third party services into one cohesive product.

Technologies

Python, Django, DRF, Angular, TypeScript, NgRx, GCP, Firebase, Docker, PostgreSQL, MJML

What I did

• Pair programming sessions with the development team.
• Consulting on feature integration and architecture decisions.
• Code reviews and best practices guidance.
• Helped the team adopt new technologies and patterns.

Impact

• Raised code quality and helped the team adopt new patterns across Java, Spring and Angular.

Technologies

Java, Spring, Angular.js, Oracle SQL

What I did

• Integration with T24, THUB and Exponea.
• Designed and built integration prototypes on IBM MQ and Apache Camel.
• Created XSD schemas and OpenAPI/Swagger specifications for third party systems.
• Implemented REST and SOAP services for external communication.
• Built KeyCloak SSO across multiple services and managed distributed transactions with Atomikos.

Impact

• Established reusable enterprise messaging and API documentation patterns.
• Implemented banking grade security standards across the integration services.

Technologies

Java, Spring, Apache Camel, IBM MQ, KeyCloak, PostgreSQL, Atomikos, Swagger/OpenAPI

What I did

• Managed a team of junior and senior developers.
• Code refactoring initiatives and technical debt reduction.
• Business logic optimization for improved performance.
• Architecture decisions, technology recommendations, code reviews and mentoring.

Impact

• Reduced technical debt and improved performance of the portal.
• Kept the team productive through refactoring and mentoring.

Technologies

Java, Spring, Angular.js, Oracle SQL, Maven

What I did

• Created new frontend components for the portal.
• Design and analysis for the required issues.
• Created and applied own solutions for the required issues.

Impact

• Delivered new portal components and solutions for the assigned issues.

Technologies

Java, JavaScript, Angular.js

What I did

• Developed new frontend components and UI features.
• Design and analysis for new feature requirements.
• Maintenance and optimization of the existing codebase.
• Selenium test automation.

Impact

• Extended the Liferay portal and automated regression testing with Selenium.

Technologies

Java, Spring, Liferay, Hibernate, jQuery, PostgreSQL, Velocity

What I did

• Built prototypes and production systems for fintech client Ferratum Group.
• Created a prototype web application for a loan and credit workflow.
• First hands on experience with reactive frontend patterns.

Impact

• Delivered a working loan process prototype and picked up reactive frontend patterns.

Technologies

Angular, GraphQL, Node.js

What I did

• Maintenance and development of new functionality on the ETS Biometric platform.
• L2/L3 programmer support for production issues.
• Managed two web applications and their microservice architecture.
• React.js and Redux frontend, Spring Boot microservices, Couchbase NoSQL, RabbitMQ, Docker on AWS.

Impact

• Kept two production biometric apps and their microservices healthy across L2/L3 support.

Technologies

Java, Spring Boot, React, Redux, Couchbase, RabbitMQ, Docker, AWS

What I did

• Rebuilt the UI layer for performance and accessibility across smartphones, tablets and desktop.
• Engineered adaptive UI logic that scales across breakpoints without losing layout density or functionality.
• Preserved the heavy Java and Ember.js business logic through a zero downtime visual migration.

Impact

• Unlocked mobile channels for insurance agents and end users.
• Delivered a reusable UI component library that cut later frontend development time.
• Kept full system stability through a complete frontend paradigm shift.

Technologies

Ember.js, JavaScript, SASS, CSS3, HTML5, Java

What I did

• DockitIn: designed and built the API between client and server for the mobile backend.
• Database schema design and JSON transformations.
• Image processing and storage solutions.
• Frontend component development with Apache Wicket.

Impact

• PNP: optimized the push notification delivery system and improved performance of the existing codebase.

Technologies

Java, Spring, Wicket, Hibernate, QueryDSL, Oracle SQL

What I did

• Implemented and extended steps within the digital credit approval workflow to drive automation.
• Adapted business and orchestration logic to changing legislative and banking compliance requirements.
• Integrated localization in multiple languages to enable deployment across global markets.
• Developed advanced print and contract templates using XSLT transformations.

Impact

• Contributed to the automation of core banking operations.
• Turned complex business and legal rules into reliable, client facing banking documentation.

Technologies

Java, Finantix Framework, XSLT, Oracle SQL, XML, BPM