Internship - Fullstack Software Engineer (Java & JavaScript)

About Webellian

Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy.

About the position

We are seeking a Fullstack Software Engineer Intern to join our team for an internal project. The main mission of the internship will be to help revive and improve an existing application while following our internal Software Development Life Cycle (SDLC) standards and best practices.

The intern will work with both JavaScript and Java, contributing to frontend and backend development. At the same time, this role has an important learning and feedback aspect: by working on a real, living system, you will help us verify whether our development procedures, documentation, and guidelines are clear, usable, and effective in practice.

This role is ideal for a young, motivated fullstack developer who wants to learn how software should be built “by the book” — where processes are meant to guide and support engineers, not require expert-level project management skills to understand.

Key Responsibilities

• Contribute to frontend and backend development using JavaScript and Java

• Help restore, improve, and extend the existing application

• Follow internal SDLC guidelines, development procedures, and documentation

• Provide feedback on the clarity and usability of development processes and documentation

• Collaborate with senior engineers to understand best practices and architectural decisions

• Assist in debugging, fixing issues, and improving code quality

• Participate in code reviews and knowledge-sharing sessions

• Help identify gaps or unclear areas in development procedures and suggest improvements

Requirements:

• Being enrolled in a Bachelor or Master degree in computer science, software engineering, or a related technical field

• Good English communication skills (B2+), Polish language is a plus

• Basic knowledge of JavaScript (frontend or backend)

• Basic knowledge of Java and object-oriented programming

• Basic understanding of web application architecture (frontend, backend, APIs)

• Familiarity with Git and version control systems

• Basic understanding of software development life cycle (SDLC) concepts

• Willingness to follow defined processes, guidelines, and documentation

• Analytical mindset and attention to detail

• Curiosity and willingness to ask questions and learn

• Independence and drive to grow as a software engineer

• Any academic, personal, or internship experience with fullstack development is considered an asset

• Familiarity with Agile/Scrum methodologies is a plus

*As an intern, you’re not expected to be an expert. What is really important is your will and ability to expand your skills during the internship and contribute actively to the company.

What we offer:

• 6 month internship

• Opportunity to work with excellent professionals, in a professional and friendly environment

• High standards of work and focus on the quality of code

• New technologies in use

• Continuously learning and growth

• International team

• Pinball, PlayStation & much more (on-site)

About you:

• Open-minded and eager to learn

• Autonomous and not afraid to ask questions

• Business oriented and looking to bring solutions 

• Capable of detailed and analytical thinking

• Ready to take responsibilities and have an impact on companies’ projects

• BE BOLD

In your CV, please include the following information: 

• Why would you like to join us?

• Do you have something to share with us? (portfolio, projects, ideas, …)