Senior Java Developer

Luxembourg Digital & IT Luxembourg, Luxembourg On-site

TMC Luxembourg is looking for a Senior Java Software Developer (M/F) for one of its clients.
- About The Member Company
- We are a global high-tech consultancy company with a team of entrepreneurial engineers, scientists, and digital experts from around the world. Together we form a fast-growing and proud community. We offer consultancy services to high-profile clients globally in diverse service areas, such as:

- Technology & Engineering
- Energy & Renewables
- Life sciences & Pharma
- Digital & IT

**About this vacancy**:
You will join the Security Development Team responsible for designing and developing secure backend and web solutions used in critical environments. The mission focuses on building and maintaining authentication, identity, and security-related services, ensuring high standards of reliability, scalability, and compliance. You will work in a modern, cloud-ready, and security-driven ecosystem, collaborating with international teams in an Agile environment.

**What we expect from you**:

- Minimum 6 years of professional experience as a Software Developer
- Strong expertise in object-oriented analysis and software design
- Solid backend development experience with Java 8 or higher
- Proven experience in API development (REST, SOAP, gRPC)
- Practical experience with authentication protocols (OAuth2, OIDC, Passkeys, TOTP)
- Strong knowledge of security concepts (PKI, X.509, encryption, JWT)
- Experience with cloud platforms or DevOps environments (AWS, Azure, GCP, Docker, Kubernetes, OpenShift, etc.) is an asset
- Strong analytical skills with the ability to identify issues and propose effective solutions
- Fluent English; French and/or German is considered a nice-to-have

**What you can expect from us**:
Why choose Employeneurship?

Our Employeneurship model is unique and represents true innovation in the high-tech consulting sector. It’s THE working relationship of the 21st century for highly skilled technical professionals. It is built around 5 key pillars:
You will have a permanent employment contract that provides stability and security,

You will learn your market value and benefit from the profits generated by your work through individual profit sharing,

We will support you with personalized coaching and a training plan designed to help you develop your entrepreneurial skills,

Our structure of technical competence cells will provide you with a strong, meaningful, and relevant network of experts,

The Entrepreneurial Lab will offer you a playground to explore new ideas and potentially be involved in launching start-ups.

The 5 basic principles of **employeneurship**
- A long-term working relationship
- Enjoy the security of a long-term contract and a stable source of income while getting the opportunity to work at diverse projects.
- Individual profit sharing
- Full transparency. That’s it. For each of your projects, you know your hourly rate, your costs, and your individual performance-based profit sharing, all in order to stimulate your inner entrepreneur.
- Business cells
- Our employeneurs are grouped in business cells based on their technical expertise. They are small, focused and function as high-grade knowledge networks. And as buzzing communities of close colleagues.
- YOUniversity
- Every employeneur drives their own career. Together, we make a plan for personal and professional growth. Receive personal coaching and an extensive training budget to keep developing yourself and deliver outperformance at our clients.
- The Entrepreneurial Lab
- Work on your technical dreams in our lab. Collaborate with others in multidisciplinary teams to unlock out-of-the-box thinking and innovative ideas as well as entrepreneurial skills.