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Flutter Developer
  • Rzeszów
Flutter Developer
Rzeszów, Rzeszów, Podkarpackie Voivodeship, Polska
Sii Sp. z o.o.
30. 10. 2025
Informacje o stanowisku

Flutter Developer

Miejsce pracy: Rzeszów

Technologies we use

Expected

  • Flutter

Optional

  • Android
  • Apple IOS
  • OAuth

About the project

Are you an experienced mobile developer looking for a challenging project?

At Sii, we’re collaborating with a leader in cloud communication technology, known for revolutionizing the telecommunications industry. We’re seeking a talented Flutter Developer to join our team and contribute to building innovative solutions for voice, video, and messaging applications. This is your chance to work on a cutting-edge project and grow with industry experts.

If you’re ready to take on this exciting opportunity, apply now!

Your responsibilities

  • Developing and implementing core features using Flutter, with a focus on integrating native Android/iOS components when necessary, depending on the project’s requirements
  • Building custom OAuth 2.0 clients and ensuring secure authentication flows, maintaining high standards of security and scalability
  • Implementing WebRTC for real-time voice communication, utilizing Flutter plugins, WebSockets, and possibly native solutions for optimal performance across iOS and Android platforms
  • Designing and developing user interface components with Flutter, aiming for an intuitive and polished user experience
  • Integrating CRM systems to ensure smooth data synchronization and communication between the mobile application and backend services

Our requirements

  • At least 5 years of experience as a mobile developer, with a strong background in Flutter and native mobile development (either Android or iOS)
  • Solid experience in either native Android development or native iOS development, combined with expertise in Flutter for cross-platform app development
  • Proficiency in OAuth 2.0, including the ability to implement secure authentication mechanisms in mobile applications
  • Experience with WebRTC or SIP for real-time communication, as well as familiarity with WebSockets for building scalable and high-performance applications
  • Very good command of English – min. B2 level
  • Fluent in Polish required
  • Residing in Poland required

What we offer

  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People

Recruitment stages

  • Send your CV
  • Talk to us about your expectations
  • Learn more about our projects and choose the best
  • Start your adventure with Sii!

Sii Sp. z o.o.

Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.

Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

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