SOFTWARE ENGINEER / BRATISLAVA, SK

JozefVavrinec.

Angular Frontend Developer and Software Engineer

I focus on building and modernizing complex Angular applications, working across frontend architecture, state management, API integrations, authentication, and automated testing.

EXPERIENCE10+ years of experience · Modern web and enterprise applications

01 / SELECTED WORK

Selected work

Selected systems and areas I have contributed to. Detailed technical case studies will be added over time.

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01 / CASE STUDY

01 / SELECTED WORK

Enterprise Digitalization Platform

Development and modernization of a configurable enterprise platform, primarily focused on Angular frontend development. Work on frontend architecture, dynamic user interfaces, data integrations, authentication, and automated testing, alongside contributions to existing .NET/C# functionality.

AngularTypeScriptNgRxRxJSODataKeycloak.NET/C#Playwright
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02 / CASE STUDY

02 / SELECTED WORK

Skills Matrix Application

Development of features for an employee skills and competency management application. Significant contributions to the plugin architecture and dynamic Angular components enabling extensible user interfaces.

AngularTypeScriptDynamic UIPlugins
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03 / CASE STUDY

03 / SELECTED WORK

Banking Web Platforms

Architecture design and largely independent implementation of a shared web platform for multiple banking brands. Angular frontend, multi-tenant .NET and Umbraco CMS backend, including custom API integrations.

AngularTypeScript.NET/C#Umbraco CMSREST API

02 / EXPERTISE

Technical Expertise

My primary focus is Angular development, application architecture, and integrations. I also have experience with testing, monitoring, and backend development.

Frontend Architecture

Design, development, and modernization of Angular applications, including standalone architecture, lazy routing, dynamic components, and maintainable user interfaces.

AngularTypeScriptSCSSKendo UI

Reactive State

Application state management with NgRx and reactive data processing using RxJS, including caching, shared HTTP requests, and asynchronous operations.

NgRxRxJSTypeScript

API & Identity

REST and OData API integrations, Keycloak/OIDC authentication, token refresh handling, and authentication state coordination across browser tabs.

RESTODataKeycloakOIDC

Quality Engineering

Design and implementation of automated E2E tests using Playwright, including shared testing infrastructure and authentication scenarios.

PlaywrightE2E Testing

Observability

Frontend monitoring with Grafana Faro and custom runtime tracing of service calls and NgRx actions to support application diagnostics.

Grafana FaroRuntime Tracing

Backend & Delivery

Additional experience with .NET/C# development, Umbraco CMS, and web application deployment, along with practical knowledge of Docker and application environments.

.NET/C#Umbraco CMSDocker

03 / EXPERIENCE

Professional Experience

From web development and system administration to modern enterprise applications built with Angular.

09/2023 – 07/2026

ASPECTA / Solvedio

Angular / Fullstack Developer

Primarily Angular frontend development for an enterprise platform. Application modernization, REST/OData integrations, Keycloak/OIDC authentication, and Playwright E2E testing. Additional contributions to existing .NET functionality.

06/2019 – 08/2023

Poštová banka / 365.bank

Software Engineer | Angular / .NET

Angular/.NET development for banking websites and internal systems. Designed and largely implemented a shared multi-tenant platform for multiple brands.

08/2016 – 05/2019

ADBEE Digital

Web Developer

Developed client websites and e-commerce solutions, and extended an in-house CMS and e-commerce platform using JavaScript, SCSS, and PHP/CakePHP.

11/2012 – 07/2016

Linwe / KRAFT

Web Developer / IT Technician

Developed websites and smaller applications while maintaining Windows servers, email services, and internal IT infrastructure.

04 / ABOUT

About Me

I've been developing web applications since 2012. I started with websites and e-commerce solutions, gradually moving into backend development and complex enterprise applications. Today, I primarily focus on frontend development with Angular and TypeScript.

With experience in backend development, integrations, and application operations, I see frontend development as part of a larger system. I'm interested not only in building user interfaces, but also in how they fit into the overall application architecture.

About

05 / CONTACT

Let's connect.

Have an interesting project or job opportunity? Would you like to discuss a potential collaboration? Feel free to reach out.