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Architected Qaron, a test management platform for QA teams

QPP a.s. · AI Solutions Architect / Solutions Architect & Tech Lead · Mar 2024 – Present

Reactive Java microservices, Go orchestration, GraphQL federation and a real time Angular frontend.

Leading architecture and development across several enterprise platforms in the test management domain. The flagship is Qaron, a test management platform for manual and automated QA, which I architected from greenfield design to deployment across multiple clients.

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 establishing shared standards and patterns across services.

Technologies

JavaKotlinSpring WebFluxGoPythonRustgRPCGraphQLAngularNgRxRxJSTypeScriptPrimeNGSassTailwind CSSKubernetesOpenShiftDockerHarborTerraformHelmArgo CDHashiCorp VaultPostgreSQLClickHouseRabbitMQMinIOLokiGrafanaPrometheusTraefikKeycloak

Built a luxury limousine booking platform end to end

LukSoft IT · Software Architect · Nov 2022 – May 2024

Angular and Django REST, multiple payment gateways, GCP routing, Firebase push.

Designed and built a luxury limousine booking platform from the ground up, from requirements and system architecture through to deployment.

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.

Technologies

PythonDjangoDRFAngularTypeScriptNgRxGCPFirebaseDockerPostgreSQLMJML

Consulting and mentoring for enterprise portal development

ITmatch · Senior Full Stack Developer & Senior IT Consultant · Jan 2023 – Dec 2023

Pair programming, code reviews and architecture guidance across Java, Spring and Angular.

Technical consulting and developer mentoring for enterprise portal development.

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.

ITmatch · Pair programming, code reviews and architecture guidance across Java, Spring and Angular.

Impact

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

Technologies

JavaSpringAngular.jsOracle SQL

Banking integration for ČSOB on the National Integration Platform

ASPECTA · Senior Integration Engineer · Nov 2020 – Mar 2023

IBM MQ and Apache Camel, REST and SOAP services, KeyCloak SSO, distributed transactions.

Enterprise integration specialist for the banking sector, primarily on the ČSOB NIP integration platform.

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

JavaSpringApache CamelIBM MQKeyCloakPostgreSQLAtomikosSwagger/OpenAPI

Team lead on a land registry portal

SYNCHRONIX, a.s. · Senior Full-Stack Developer & Team Lead · Apr 2019 – Oct 2020

Led the team, cut technical debt and optimized the business logic.

Led a development team and drove technical improvements for a land registry portal.

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.

SYNCHRONIX, a.s. · Led the team, cut technical debt and optimized the business logic.

Impact

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

Technologies

JavaSpringAngular.jsOracle SQLMaven

Waste management portal for the Ministry of Economy

TEMPEST · Senior Full Stack Engineer · Oct 2018 – Mar 2019

Built new frontend components and owned design and analysis for the required issues.

Waste management portal for the Ministry of Economy. Built new frontend components and owned design and analysis for the required issues.

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

JavaJavaScriptAngular.js

Full stack development on Liferay enterprise portals

Slovak Telekom · Senior Full Stack Engineer · Apr 2018 – Sep 2018

New UI components and Selenium test automation.

Full stack development for Liferay based enterprise portals.

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.

Slovak Telekom · New UI components and Selenium test automation.

Impact

Extended the Liferay portal and automated regression testing with Selenium.

Technologies

JavaSpringLiferayHibernatejQueryPostgreSQLVelocity

Microloan platform prototype for Ferratum

Multitude IT Labs · Senior Programmer & Analyst · Sep 2017 – Mar 2018

First reactive frontend, Angular with GraphQL and Node.js.

Built prototypes and production systems for a fintech client, a microloan platform prototype for Ferratum Group.

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

AngularGraphQLNode.js

Team lead on the ETS biometric identity platform

Accenture · Senior Application Development Analyst & Team Leader · Jul 2016 – Aug 2017

React and Redux, Spring Boot microservices, Couchbase, Docker on AWS.

Worked on the ETS Biometric project, an identity verification platform on a microservice architecture.

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.

Accenture · React and Redux, Spring Boot microservices, Couchbase, Docker on AWS.

Impact

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

Technologies

JavaSpring BootReactReduxCouchbaseRabbitMQDockerAWS

Made a life insurance app responsive and mobile first

Annotation · Frontend Developer · May 2016 – Jun 2016

Ember.js UI rebuild, reusable components, zero downtime migration.

Led the technological transformation of a core life insurance web application, moving a legacy desktop only system into a modern, responsive, mobile first platform.

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.jsJavaScriptSASSCSS3HTML5Java

Mobile backend and push notifications

QBSW, a.s. · Programmer & Analyst · Jul 2015 – Apr 2016

Built the DockitIn API and optimized push delivery, Java and Spring.

Built prototypes and production systems for enterprise clients (the DockitIn mobile backend and push notification optimization).

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.

QBSW, a.s. · Built the DockitIn API and optimized push delivery, Java and Spring.

Impact

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

Technologies

JavaSpringWicketHibernateQueryDSLOracle SQL

First job: automating loan workflows on Finantix

Slovenská sporiteľňa · Java & BPM Junior Developer · Nov 2014 – May 2015

BPM credit approval steps and XSLT contract templates for a banking platform.

Started my professional career on Finantix, a global enterprise banking platform, digitizing and automating credit and loan management workflows.

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

JavaFinantix FrameworkXSLTOracle SQLXMLBPM