Possible locations
  • Bialystok
  • Bydgoszcz
  • Cracow
  • Czestochowa
  • Gdansk
  • Gliwice
  • Katowice
  • Lodz
  • Lublin
  • Pila
  • Poznan
  • Rzeszow
  • Szczecin
  • Torun
  • Warsaw
  • Wroclaw
  • Remote work
Technologies & tools

Must have:

  • Java
  • React.js/ Vue.js
  • Cloud
  • Microservices

Nice-to-have:

  • Kotlin

At Sii, we create an environment where experienced professionals thrive! Recognized as a "Great Place to Work," we offer opportunities for continuous growth and collaboration with a team of senior developers. Enjoy the flexibility of 100% remote work while refining your skills and tackling exciting challenges.

In this project, you'll work on a cutting-edge solution that enables users to integrate messaging features across popular platforms like WhatsApp, Messenger, and Viber. Your work will simplify the onboarding process, allowing users to start using these tools in less than five minutes. You'll build and optimize a high-performance system that handles large volumes of messages, ensuring seamless communication across regions and platforms.

We're looking for developers with senior-level experience in Java and Vue.js or React.js, as well as a solid background in cloud technologies, ideally AWS.

If you're ready to take on complex challenges and contribute to a solution that could impact millions—including yourself—join us at Sii! Apply today and take the next step in your career—whether on this project or one of many others!

Your role

  • Designing and implementing Micro-Frontend architectures to ensure modular, scalable, and efficient solutions across the messaging platform
  • Developing APIs and backend services, ensuring seamless integration and high-performance communication between system components and third-party platforms
  • Optimizing both the frontend and backend to enhance performance, improve system reliability, and deliver a better user experience
  • Ensuring the quality and stability of deployed services through comprehensive testing, debugging, and maintaining clear documentation for future support
  • Improving customer experience by collaborating with Product Managers, UX teams, and other stakeholders to optimize the dashboard and developer experience in a fully remote, globally distributed team

Your skills
  • At least 5 years of experience with Java, Vue.js React.js, and microservices. Strong experience with AWS or other cloud platforms
  • Good knowledge of relational and NoSQL databases
  • Experience with unit testing (JUnit) and writing reliable code
  • Solid understanding of HTML and CSS3, and creating responsive interfaces
  • Fluent in English, with the ability to work in a remote team across different locations

Job no. 241108-Q2CKX

Why Sii

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

Fascinating projects

prestigious brands from around the world, long-term contracts and preferred partner status for many clients

Project suited to you

Do you want to change your career path? Is your project coming to an end? We’ll find you a new one! We have an app for this – Job Changer

We share the profit with Workers

Last year we allocated PLN 2,1BN to this benefit

PLN 500 000 per year for your ideas

with this amount, we support the passions and voluntary actions of our workers

7 500 experts and many development opportunities

Tech Communities, workshops, a training platform, and a technology blog – you choose

Employment stability

revenue of EUR 480M, no debts, since 2006 on the market

Great, comfortable offices

perfect place to work, integrate, have fun together, and celebrate successes

Open-minded and available management team

quick decision-making, we’re all on a first-name basis

True values

these are not empty words – we’re guided by them every day

Fantastic atmosphere

created by all Sii Power People

Attractive benefits package

private healthcare, benefits cafeteria platform, car discounts and more

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