Intern Engineer
About the company
Are you interested in joining Zaleos? At Zaleos, we develop software for real-time communications (RTC) systems.
Our mission is clear: to help companies guarantee secure, stable, and always-available communications.
We work in critical environments where reliability is not optional:
- Voice AI: we improve the telephony layer for conversational agents and intelligent voice platforms.
- Enterprise communications: we develop software for VoIP, CPaaS, and cloud PBX platforms.
- Emergency systems: extensive experience designing and developing the Core Services for emergency calling networks in the USA.
Since 2015, we have helped companies from different sectors keep their RTC communications always operational, with a culture centered on engineering, quality, and technical responsibility.
At Zaleos, we share a culture based on trust, autonomy, and technical excellence. Every team member acts with responsibility and professional judgment, providing solutions and caring for product quality.
Our values
- Total Integrity
Transparency, responsibility, and trust, even when things are not going well.
- Ownership
Every person acts with autonomy and a sense of ownership over their work.
- Excellence
We deliver clean, stable, and maintainable systems that we can be proud of.
How we work At Zaleos, we take engineering seriously. Our culture combines Agile, Lean, and DevOps principles with an obsession for technical resilience, architectural clarity, and continuous improvement.
Our technical principles —The Tao of Zaleos— are the foundation of everything we do:
- Resiliency – Always up, always ready.
We design for fault tolerance and continuous availability.
- Strategic Modularity – Low Coupling, High Cohesion.
We create clear, cohesive modules with minimal dependency.
- Immutability – Certainty through consistency.
We automate and control everything that is deployed, without improvisation.
- Everything as Code – What is not version-tracked is lost.
Everything important is under version control.
- Pragmatism – Effective solutions over perfect ideals.
We prioritize useful solutions over perfect ones.
Why Zaleos? Because here engineering has a purpose. Every project has an impact on our customers' real-time communications and keeps the world's critical communications running.
Your tasks
- Development of software competencies for telecommunications: SIP / IMS protocols.
- Software development with high quality standards. Development of systems and DevOps competencies (Linux, Docker, CI).
- Use of Open Source tools and libraries in a GNU/Linux environment.
- Participation in team dynamics: meetings, presentations, pair work, agile methodologies.
- Participation and learning in a high-level technical environment oriented towards software quality and process efficiency.
Above all, you will have the opportunity to learn in a real environment, participating in impactful projects and working hand-in-hand with experienced professionals.
Requirements
What are we looking for? A student who wants to do their internship with us, who feels aligned with our corporate values and, above all, wants to grow and develop their professional career at Zaleos.
Minimum requirements
- Students of Computer Engineering, Telecommunications, or similar degrees.
- Possibility of signing an internship agreement with your educational center or through our external partner.
- English B2.
- Above all, the desire to learn and contribute.
If you are passionate about technology, motivated by technical challenges, and value quality over quantity, this is the place for you.
What we offer
- Modality: Hybrid. In-person on Tuesday, Wednesday, and Thursday at our Madrid offices (Chamberí area) and Monday and Friday via remote work.
- Duration: 3 months (evaluating continuity).
- Study allowance based on dedication (proportional to weekly hours), according to the internship agreement.
- Great growth possibilities in a real, dynamic learning environment with the possibility of participating in relevant projects.
- Mentoring and support from the team.