David Helebrant

Software Engineer and frontend-focused full-stack developer with strong commercial experience in Angular, TypeScript, RxJS, NgRx, Nx monorepos, SCSS/Sass, REST APIs, PostgreSQL, Docker, and business-critical customer workflows. Strongest in frontend engineering, architecture-oriented UI implementation, reusable components, design systems, and connecting frontend development with API contracts and real product requirements. I also have experience from industrial software and HMI environments, including interface design for machine control screens, SVG optimization, and collaboration with engineering teams.

I enjoy working at the intersection of frontend architecture, UX/UI, component systems, maintainable code, and products used across multiple teams.

Software Engineer at Telly s.r.o. (2023-01 – 2026-07)

Worked on frontend applications and backend services for an internet TV provider in an Angular/Nx environment.

• Delivered business-critical customer workflows in Angular, TypeScript, RxJS, NgRx, SCSS/Sass, and Nx
• Built backend services and integrations using Node.js, PostgreSQL, Docker, Redis, and Google APIs
• Developed a customer credibility API and a Kafka consumer for customer data updates triggered by debt-payment events
• Connected frontend implementation, backend services, API contracts, data flows, and real customer-related business logic

Angular Developer at Bishub Ltd. (2021-05 – 2022-11)

Worked on three prototype products combining frontend development, UI design, and product-oriented implementation.

• Built Angular prototypes for a banking app, a travel platform, and a paid video chat application
• Implemented responsive UI flows and aligned screens with API contracts and business requirements
• Worked with Angular, TypeScript, JavaScript, HTML, SCSS/Sass, Figma, Swagger, and Node.js-related tooling

UX Designer / Frontend Contributor at OKsystem

Approx. 6 months

• Designed interfaces in Figma for an industrial automation control system and a government support application
• Improved SCSS responsiveness for a planning application across multiple screen sizes
• Bridged UX design decisions with practical frontend implementation needs

Senior Software Engineer / HMI UI Designer at Bühler s.r.o.

Approx. 12 months

• Designed HMI interfaces for industrial milling machines
• Created around 400 icons for machine control screens
• Optimized SVG assets exported from Adobe Illustrator for engineering teams
• Helped improve HMI system reaction time through SVG optimization

Drupal Developer at KD holding

Approx. 6 months

• Built and adapted Drupal websites for multiple business clients
• Worked with agency-supplied designs and templates to deliver production-ready websites
• Used PHP, MySQL, HTML, CSS, and JavaScript

Co-owner / Marketing Director at Mexagave s.r.o. (2011-08 – 2021-12)

Helped introduce a new beverage product to the Czech Republic and Belgium

• Led brand development, digital presence, product communication, photography, copywriting, packaging, and promotional materials
• Supported online presentation and marketing operations with PHP, JavaScript, HTML, CSS, SVG, and Adobe tools
• Gained practical experience in entrepreneurship, international business development, and product communication

Frontend Developer / Marketing Coordinator at Pronix s.r.o. (2006-06 – 2008-12)

• Worked on web design, branding, promotional materials, translations, and frontend development for a power monitoring application

Marketing & Operations Coordinator at Dandeli foods s.r.o. (2003-12 – 2006-06)

• Coordinated catalog production, product photography, copywriting, rebranding materials, and operational support in an English-speaking FMCG environment

Au-pair / English Language Stay (2001-12 – 2003-12)

• Lived and worked in an English-speaking environment while attending Darlington College of Technology

Web Developer at Sp-Tech s.r.o. (1999-08 – 2000-09)

• Built HTML/CSS pages and prepared online product catalog content for industrial machinery

Web Developer at MirSoft s.r.o. (1998-06 – 1998-08)

• Gained first professional experience in HTML and basic website creation

Grammar school

Post-secondary studies

– Darlington College of Technology (2001-12 – 2003-12)