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Principal Web UI Developer (React), Budapest

ION· Lab49 – Software Engineering
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BudapestFull-timePosted 11mo ago

About the role

Senior web UI leader for Lab49 in Budapest, responsible for design, development, and leadership of front-end UI engineering in client projects, with hands-on engineering and client-facing responsibilities.

Responsibilities

  • Partner with clients to lead design and build of user experiences using modern web development technologies; manage a team of UI engineers and collaborate with key contributors to deliver software in client environments.
  • Contribute to the Interactive Practice UI engineering community within Lab49, promoting high-quality software development practices.
  • Act as a hands-on engineer and architect across the Front-end Interactive Practice, leading projects and modeling best practices.
  • Build and maintain strong client relationships, acting as a strategic partner and technical advisor to expand footprint and secure follow-on work.
  • Collaborate with Lab49 business development to create and deliver pitches, define problems, present solutions, and negotiate engagement terms.
  • Develop management skills and practices among line managers in the Engineering practice, fostering strategic career planning and development.

Qualifications

  • 10+ years of hands-on experience designing and building complex, commercial-grade software applications, with 5+ years leading Agile teams.
  • Proven track record in leadership, problem-solving, and decision-making.
  • Experience managing project teams and interacting with clients in finance, consulting, or startup environments.
  • Passion for technology and staying current with industry trends through events and meetups.
  • Experience with JavaScript and TypeScript, with modern frameworks (e.g., Angular, React, Vue or similar).
  • Experience with one or more cloud platforms and understanding of continuous delivery practices.
  • Strong understanding of testing, quality, CI, source control, and code reviews.
  • Experience in capital markets or financial markets/products is highly desirable.

Skills

Required:Frontend design and architecture leadershipJavaScript/TypeScriptUI engineering leadership
Last updated Oct 21, 2026. Interested? Apply on the company site.

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Reinventing the way business is done through automation technology

ION financial software improves decision making, simplifies complicated processes and empowers you by providing the right tools.

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