ISS connects people and places to make the world work better. Are you ready to connect to a place where you belong? At our corporate facilities or at client sites – together, we make places while transforming businesses into having even more positive impact on societies, the environment, and our people.

Location: Location: Warsaw - Poland 

Language: English 

Main purpose of the position:

As a Fullstack Developer, you will contribute to the development and maintenance of our internal applications, ensuring seamless integrations between different services and platforms. You will work with modern technologies and collaborate with cross-functional teams to build scalable and maintainable solutions.
 

What you’ll do:

• Develop new features, and address maintenance and continuous improvement of existing software with a strong focus on maintainability and quality; 
• Deep in conversations regarding the creation of fresh components and services that seamlessly blend with both internal and external services, overseeing their execution; 
• Actively contribute to the documentation of codebase architecture, design decisions, and best practices, ensuring that knowledge is effectively shared and maintained within the team; 
• Actively participate in code reviews and provide constructive feedback to peers, fostering a collaborative and knowledge-sharing environment within the development team. 
   

Who you’ll work with:

• Software Development Team: You'll collaborate closely with other developers to share knowledge, tackle challenges together, and ensure code consistency and quality; 

• Product Owners and Designers: You'll work closely with product managers and designers to understand user needs, translate them into technical requirements, and ensure the final product meets expectations; 

• QA Engineers: You'll work with QA testers to identify and fix bugs, ensuring software functionality and user experience are optimized; 

• DevOps Engineers: You'll collaborate with DevOps engineers to streamline the software development lifecycle, including deployment, automation, and infrastructure management. 

Key qualifications:

You should have:  

• 4+ years of experience as a Fullstack Developer, with expertise in Node.js and React. 

• Strong knowledge of TypeScript, ensuring robust and maintainable code. 

• Experience working with relational databases, particularly PostgreSQL. 

• Deep understanding of APIs and integrations, including RESTful APIs, authentication mechanisms (OAuth, JWT), and third-party service integrations. 

• Familiarity with cloud services, such as Azure, for hosting and managing applications. 

• Problem-solving mindset with the ability to work in a collaborative, cross-functional team environment. 

• Excellent English communication skills, both written and spoken. 

Nice to have: 

• Experience with CI/CD pipelines to streamline deployment processes. 

• Knowledge of frontend performance optimizations and best practices. 

• Understanding of microservices architecture and best practices for scalable applications. 

Why ISS

Since our founding in 1901, ISS has been a people-first company. We recognize the power of diversity and celebrate the differences that make us unique. When everyone is free to be themselves, everyone benefits. Our people feel safe, respected, represented, and supported as their authentic selves, allowing them to seize opportunities and reach their full potential. We take seriously our obligation to improve lives, make a difference in our communities, and protect our planet — because when we get things right, the world works better. And that is what drives us.

ISS is a Place to Be You.

Be who you are. Become what you want. Be part of something bigger.

Become more. Become ISS.

How you’ll apply

Apply directly via the link on this page by submitting a cover letter, CV and other relevant documents for the position you are applying for.

We look forward to receiving your application as soon as possible. Please contact [insert title and name] at [+00 country code and phone number] if you have questions about the position.

ISS seeks to BE a place of belonging and CREATE places where every person is welcomed, embraced, and valued for exactly who they are. Places where people feel safe, respected, represented, and supported as their authentic selves.