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I’m an experienced JavaScript front-end developer and team lead with a proven track record of building modern, scalable web applications and guiding teams through complex technical transitions. Over the past decade, I’ve helped companies in gaming, streaming, and scientific domains modernize their platforms, moving from legacy stacks to React and TypeScript while shaping UI architecture for high-impact products. I thrive at the intersection of hands-on coding, architectural design, and team leadership—balancing technical depth with people management, mentoring, and close collaboration with product and design stakeholders. From leading cross-functional teams to driving feature delivery under tight timelines, I’m passionate about creating intuitive, high-quality user experiences and improving the workflows that make teams more effective.…I’m an experienced JavaScript front-end developer and team lead with a proven track record of building modern, scalable web applications and guiding teams through complex technical transitions. Over the past decade, I’ve helped companies in gaming, streaming, and scientific domains modernize their platforms, moving from legacy stacks to React and TypeScript while shaping UI architecture for high-impact products. I thrive at the intersection of hands-on coding, architectural design, and team leadership—balancing technical depth with people management, mentoring, and close collaboration with product and design stakeholders. From leading cross-functional teams to driving feature delivery under tight timelines, I’m passionate about creating intuitive, high-quality user experiences and improving the workflows that make teams more effective.

David Vass

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I’m an experienced JavaScript front-end developer and team lead with a proven track record of building modern, scalable web applications and guiding teams through complex technical transitions. Over the past decade, I’ve helped companies in gaming, streaming, and scientific domains modernize their platforms, moving from legacy stacks to React and TypeScript while shaping UI architecture for high-impact products. I thrive at the intersection of hands-on coding, architectural design, and team leadership—balancing technical depth with people management, mentoring, and close collaboration with product and design stakeholders. From leading cross-functional teams to driving feature delivery under tight timelines, I’m passionate about creating intuitive, high-quality user experiences and improving the workflows that make teams more effective.…I’m an experienced JavaScript front-end developer and team lead with a proven track record of building modern, scalable web applications and guiding teams through complex technical transitions. Over the past decade, I’ve helped companies in gaming, streaming, and scientific domains modernize their platforms, moving from legacy stacks to React and TypeScript while shaping UI architecture for high-impact products. I thrive at the intersection of hands-on coding, architectural design, and team leadership—balancing technical depth with people management, mentoring, and close collaboration with product and design stakeholders. From leading cross-functional teams to driving feature delivery under tight timelines, I’m passionate about creating intuitive, high-quality user experiences and improving the workflows that make teams more effective.

Available to hire

I’m an experienced JavaScript front-end developer and team lead with a proven track record of building modern, scalable web applications and guiding teams through complex technical transitions. Over the past decade, I’ve helped companies in gaming, streaming, and scientific domains modernize their platforms, moving from legacy stacks to React and TypeScript while shaping UI architecture for high-impact products.

I thrive at the intersection of hands-on coding, architectural design, and team leadership—balancing technical depth with people management, mentoring, and close collaboration with product and design stakeholders. From leading cross-functional teams to driving feature delivery under tight timelines, I’m passionate about creating intuitive, high-quality user experiences and improving the workflows that make teams more effective.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Beginner

Beginner

Beginner

Language

English

Fluent

Czech

Fluent

Slovak

Fluent

Work Experience

Javascript front-end developer/Team lead at Splash inc.

January 1, 2025 - September 23, 2025

As an early team member, I led the development of a modern UI for both existing and new products, partnering closely with product and design to shape processes and deliver high-quality user experiences on tight timelines. I scaled the front-end architecture, drove rapid feature delivery, and guided a cross-functional team through the evolution of our core gaming platform. My role balanced hands-on UI development with leadership, team effectiveness, and day-to-day collaboration with product and design to ensure seamless integration from concept to execution.

Javascript front-end developer/Team lead at DNAnexus

January 1, 2022 - September 23, 2025

Led the Prague UI team, combining people and project management with hands-on development (~40% of the time). Oversaw delivery timelines, team wellbeing, and hiring, while actively contributing to new feature development and technical decisions.

Javascript front-end developer at DNAnexus

January 1, 2021 - September 23, 2025

Contributed to the migration of the platform from Chaplin.js to a modern React + TypeScript stack. Focused on developing new features, refactoring legacy code, proposing improvements in both code and development processes, and mentoring junior team members.

Team lead at Showmax

January 1, 2019 - September 23, 2025

Promoted after 1.5 years as a front-end developer to lead the website team. Worked closely with product stakeholders to align technical and business goals. Focused on team satisfaction, hiring, process improvement, and delivery of new features.

Javascript front-end developer at Showmax

January 1, 2017 - September 23, 2025

Joined to help migrate the main product from a Chaplin.js codebase to React. Played a key role in laying the foundation of the new codebase and onboarding team members to React. Later focused on feature development and app maintenance. Also contributed to Ruby on Rails backend apps, managing their visual/UI layer.

Visual Designer, Javascript front-end developer at Freelancer

January 1, 2016 - September 23, 2025

Began as a UI/visual designer, then transitioned into front-end development. Worked on small business websites and internal web applications. Initially built sites using jQuery, later developing more complex single-page applications in React.

Visual Designer & Web developer at WEPS

January 1, 2014 - September 23, 2025

Originally hired as a Ruby developer with no prior Ruby experience. Grew into a full-stack role with a focus on front-end and UX/UI design, leveraging design expertise and JavaScript knowledge to contribute across the product stack.