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The Living Ledger

Ondrej Luknár

AI Solutions Architect & Tech Lead

Agentic AI · Local LLM · GraphRAG. Turning vibe coded chaos into production grade architecture.

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12/12 roles
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Years–

Flagship · Mar 2024 – Present

Architected Qaron, a test management platform for QA teams

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 building 13+ microservices with shared standards and patterns.

QPP a.s.

AI Solutions Architect · Jul 2026 – Present / Solutions Architect & Tech Lead · Mar 2024 – Jul 2026

Technologies

JavaKotlinSpring WebFluxGoPythonRustgRPCGraphQLAngularNgRxRxJSTypeScriptPrimeNGSassTailwind CSSKubernetesOpenShiftDockerHarborTerraformHelmArgo CDHashiCorp VaultPostgreSQLClickHouseRabbitMQMinIOLokiGrafanaPrometheusTraefikKeycloak

Full stack · Nov 2022 – May 2024

Built a luxury limousine booking platform end to end

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

LukSoft IT · Software Architect · Nov 2022 – May 2024

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.
  • Integrated 6+ third party services into one cohesive product.

Technologies

PythonDjangoDRFAngularTypeScriptNgRxGCPFirebaseDockerPostgreSQLMJML

Full stack · Jan 2023 – Dec 2023

Consulting and mentoring for enterprise portal development

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

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

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.

Impact

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

Technologies

JavaSpringAngular.jsOracle SQL

Integration · Nov 2020 – Mar 2023

Banking integration for ČSOB on the National Integration Platform

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

ASPECTA · Senior Integration Engineer · Nov 2020 – Mar 2023

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

Full stack · Apr 2019 – Oct 2020

Team lead on a land registry portal

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

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

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.

Impact

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

Technologies

JavaSpringAngular.jsOracle SQLMaven

Full stack · Oct 2018 – Mar 2019

Waste management portal for the Ministry of Economy

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

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

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 · Apr 2018 – Sep 2018

Full stack development on Liferay enterprise portals

New UI components and Selenium test automation.

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

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.

Impact

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

Technologies

JavaSpringLiferayHibernatejQueryPostgreSQLVelocity

Frontend · Sep 2017 – Mar 2018

Microloan platform prototype for Ferratum

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

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

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

Full stack · Jul 2016 – Aug 2017

Team lead on the ETS biometric identity platform

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

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

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.

Impact

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

Technologies

JavaSpring BootReactReduxCouchbaseRabbitMQDockerAWS

Frontend · May 2016 – Jun 2016

Made a life insurance app responsive and mobile first

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

Annotation · Frontend Developer · May 2016 – Jun 2016

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

Backend · Jul 2015 – Apr 2016

Mobile backend and push notifications

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

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

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.

Impact

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

Technologies

JavaSpringWicketHibernateQueryDSLOracle SQL

Backend · Nov 2014 – May 2015

First job: automating loan workflows on Finantix

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

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

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