Senior Frontend Developer (Svelte Specialist) Lisboa

Senior Frontend Developer (Svelte Specialist)
Lisboa
Lisboa, Lisboa, Portugal

Imagine standing at the top of the Empire State Building, taking in the breathtaking view. From the online booking to the seamless entry, every part of your ticketing experience was designed and supported by Ventrata. An
- leading Saa
S platform that helps attractions, tours, and activities create memorable experiences.

Backed by a passionate team, headquartered in London with offices in Brno, Lisbon, and remote teams worldwide, we’re expanding rapidly across multiple markets and verticals. Our mission is to help businesses of all sizes scale and grow while preserving their unique identity and spirit.

Be a part of something extraordinary, where your ideas and contributions truly matter. Let’s shape the future of travel together.

Are you a frontend craftsman with the ability to create and maintain complex projects? Are you interested in
- edge technology? Do you see an existing,
- quality app not just for what it is, but for what it could become? If the challenge of transforming a modern application with a total redesign and Svelte 5 excites you, we need to talk.

The Challenge: A Ground-Up Redesign on a New Foundation

This isn't about tweaking a simple app. Our core product is a powerful,
- driven checkout widget with multiple display modes, complex booking flows (like
- sell and multibooking), and a dependent booking managing module. It's a mature,
- quality application, and now it's ready for its next evolution.

Our mission is to execute a total redesign. This is more than a facelift; it's a fundamental reimagining of our user flows, component library, and design system, all built upon a modern Svelte 5 foundation.

What You'll Be Building & Transforming

Our checkout widget is a SPA built upon Svelte 4, Vite, Typescript, Tailwind, Vitest, and Cypress.

Your responsibility will be foundational migrations (upgrading Vite, Tailwind, etc. ), giving you a unique opportunity to learn the codebase's intricacies. With that foundation in place, you will participate in translating a new, comprehensive Figma design with a focus on project maintainability and code clarity.

As our Senior Frontend Engineer, you will be the primary force for this transformation, working alongside our Tech Lead to build the future of our product.

What else?

We are looking for out-of-the-box thinking. Any action you take should be with full responsibility and intent.

What does it mean?

• You are the owner of the delivery, you can push it, tweak it, ask questions!
• You know when to be pedantic and take safe steps and when to take action
• You can deliver :)

What about AI?

We are heavily integrating AI into our process, using tools like Claude Code for code generation or Gemini CLI for experiments.

This doesn’t mean we delegate our work to agent systems, but we use them to leverage the delivery. They are meant to augment our creativity and accelerate development. We don’t expect autonomous deliveries without your involvement.

Other packages?

Our philosophy is "lean by design, " and you'll be a key guardian of our codebase's quality as we transform it. We are building a product with specific needs. There will always be
- making before package inclusion into the codebase. Size and complexity are key, requiring deep technical expertise. You need to know how to develop components and libraries.

What about test coverage?

We have
- tier QA with an excellent E2E suite. You will be required to cover your features with component and unit tests. This is not just about shipping and hoping it works. '

We're talking about uncompromising quality. Cypress and Vitest are your friends.

What 'Senior' Means to Us

• You're a Master Builder: You've worked with complex SPAs. You can analyze a solid, existing system and see how to make it exceptional. You implement patterns effectively to create clean, maintainable, and performant code.
• You're a Product-Minded Engineer: You seek to understand the "why" behind features. You can translate complex business rules into a seamless user experience.
• You're a Problem Deconstructor: You are autonomous, capable of analyzing, planning, and executing
  - step transformations with ownership.
• You're a Tech Enthusiast: The idea of leveraging AI tools excites you. You understand CI/CD principles (using Git
  Hub Actions) and have a grasp of API design. Backend experience is a plus.

• Expert knowledge of modern Java
  Script (ESNext) and Type
  Script.

• Proven experience building and maintaining complex,
  - scale SPAs.
• Experience with
  - scale refactoring and evolving a mature codebase.
• Ability to work with intricate business rules and user flows.
• Deep professional experience with Svelte is a significant advantage. Alternatively, experience with React or Vue and a passion for mastering Svelte.
• A pragmatic approach to
  - solving and a love for frontend development.
• Intermediate English proficiency.
• Nice-to-have: Backend development experience.

Note: The team is mostly based in the Czech Republic, so we prefer candidates from the same time zone.

• Flexible working hours, remote work, unlimited holidays.
• Start-up environment,
  - building events, office options in Brno and Lisbon.
• Competitive salary, regular revaluation, bonuses, hardware setup, and refreshments.

If you're excited to join Ventrata, send us your CV!

About Ventrata

Ventrata is a ticketing platform for
- volume attractions, offering comprehensive solutions for online and
- person sales, resource management, hardware integrations, and 24/7 support.

Since 2016, we’ve partnered with notable clients like Big Bus Tours, English Heritage, and the Empire State Building. We are profitable, independent, and committed to innovation and growth.