PAT Junior Developer -C

About Proximus NXT

Proximus NXT Luxembourg supports all organizations in their digital transformation, by providing holistic ICT & Telecommunication solutions, as well as tailored managed services. With our partners and customers, we co-create opportunities and enable growth in a secure and sustainable manner. As a result of our unique expertise in next-gen IT services, mobile and advanced connectivity, we help our customers achieve their ambitions and realize their vision.

Together with them and our partners we implement sovereign and trusted solutions that make people work smarter.– www.proximusnxt.lu

Your mission :

We are looking for a Junior Software Engineer to join our team and take ownership of the internal tools and applications that support our organization’s operations.

Overall Job Description
As a Junior Software Engineer with 3+ years of experience, you will be a key technical authority within the team, taking ownership of the full lifecycle of internal applications, from architecture and development through to maintenance, optimization, and continuous improvement. You will work across a broad technology stack (front-end, back-end, scripting, and databases) and act as a technical reference for the team. You will translate business needs into reliable software, drive engineering standards, and mentor junior colleagues.

Activities
• Design, build, and maintain internal applications across the full stack.
• Own delivery end-to-end: from requirements and design through deployment and support.
• Develop and maintain database objects across Oracle, MS SQL Server, and MySQL.
• Write automation scripts in Python, PowerShell, and VBA to reduce manual effort.
• Analyze and refactor legacy applications (VB.NET, VBA, ASPX) for quality and performance.
• Work with stakeholders to turn business requirements into technical specifications.
• Lead code reviews and enforce development standards across the team.
• Troubleshoot complex issues across applications and databases, including root cause analysis.
• Maintain technical documentation in Confluence.
• Participate in Agile ceremonies and contribute to sprint planning and estimation.

Your profile :

Professional Skills
• Full-stack development: ASPX/ASP.NET, Java/Tomcat, and PHP/MySQL.
• Strong Java development skills: REST APIs, servlet-based architecture, Tomcat lifecycle management.
• VB.NET for enterprise Windows applications: WinForms, data binding, system integration.
• Scripting and automation: Python, VBA, and PowerShell across Microsoft and enterprise environments.
• Advanced SQL skills on Oracle (PL/SQL, stored procedures) and MS SQL Server (TSQL, SSMS, query optimisation).
• MySQL experience in web application contexts: schema design, query tuning, and application integration.
• Git version control: branching strategies, code review, and CI/CD integration.
• Agile practices: Scrum/Kanban, sprint planning, backlog refinement, iterative delivery.
• Atlassian suite: Jira for tracking, Confluence for documentation, Bitbucket for source control.
• Strong grasp of software engineering principles: clean code, SOLID, design patterns, and unit testing.
• Clear communicator with both technical teams and non-technical stakeholders.
• Proven ability to mentor engineers and raise team-wide code quality.

Qualifications / Experience
• Bachelor's or Master's in Computer Science, IT, Software Engineering, or relatedfield.
• 3+ years of professional software engineering experience.
• Proven expertise across: Java, Python, VB.NET, PHP, PowerShell, VBA, ASPX.
• Strong production experience with Oracle and/or MS SQL Server.
• Track record of delivering internal tools and enterprise applications.
• Professional certifications (Java, Microsoft, Oracle, or similar) are a plus.

Requirements
• EU citizenship.
• Fluent in English (written and spoken); additional European languages are a plus.

Our offer:

• A professional, stimulating and innovative working environment:

Joining Proximus Luxembourg means becoming part of a human-sized company while benefiting from the strength, expertise and opportunities offered by the Proximus Group. You will work within dynamic, supportive and collaborative teams, where team spirit, knowledge sharing and innovation play a central role.

• Genuine career opportunities within the Proximus Group:

You will have the opportunity to develop your career within Proximus Luxembourg and the Proximus Group, both nationally and internationally. Thanks to the diversity of our activities, internal mobility opportunities and an environment that encourages continuous learning, you will be able to strengthen your skills and grow your expertise in innovative fields such as cloud, data, artificial intelligence, telecommunications and emerging technologies. You will benefit from personalized support and tailored training programs to support your professional development.

• An attractive remuneration package and benefits that support your work-life balance:

Your salary is defined according to a clear salary framework, taking into account your professional experience, skills and seniority. The recruiter will share the applicable salary range with you before the first interview. You will also benefit from flexible working hours with the possibility of teleworking, as well as numerous benefits: meal vouchers, the possibility of a company car, “quality time” dedicated to supporting your work-life balance (4 hours per month), additional days of leave linked to our collective agreement, sports and well-being activities, and much more.

• A company committed to diversity and inclusion:

Proximus Luxembourg promotes equal opportunities and provides an inclusive environment where everyone can thrive and develop their full potential. Our multicultural teams, representing 34 nationalities, reflect the richness of our company culture.

As part of the recruitment process, a criminal record extract may be requested. Your personal data is processed in accordance with applicable data protection regulations.