**Location:** Madrid, M, ES **Professional Profile:** Defense and Security **Required Experience:** More than 2 years of experience **Work Modality:** Hybrid At Indra, we are looking for a Test and Product Validation Engineer for strategic projects in Voice Communication and Remote Radio Control Systems. **Join our team on strategic Defense and Communications projects!** At Indra, a leader in technological solutions for defense and security, we are seeking a Telecommunications Engineer to join our Critical Communications team, participating in strategic projects that guarantee secure connectivity in land, naval, and airborne environments. Did you know that at Indra we lead critical communications for defense and security? In our Communications area, we design and develop advanced solutions that ensure secure and reliable connectivity in land, naval, and airborne environments. We work with cutting-edge technologies in tactical systems, satellite links, and interoperable networks for strategic missions. **What will you do?** * Execute functional and validation tests on VoIP systems. * Design test cases and generate comprehensive documentation (plans, procedures, reports). * Analyze networks and protocols (SIP, RTP, G.711) using tools such as Wireshark. * Implement test automation and ensure traceability throughout the entire lifecycle. * Collaborate on system integration and definition of test strategies. **What are we looking for in you?** Don’t worry if you don’t meet 100% of what we’re seeking. Go ahead—learn about our proposal and let us get to know what you can bring to the table! ✅ Experience (3–4 years) in testing and validation of communication systems. ✅ Knowledge of VoIP, SIP, RTP, SBC, Cisco, and network protocols. ✅ Proficiency with tools: Wireshark, Squish, Zephyr, Git, SVN, Jira, DOORS. ✅ Familiarity with PECAL methodologies and configuration management. ✅ Experience with Linux and Red Hat. **What we offer you** Stability and Future * ✨: Long-term projects at a leading Defense company with over 50,000 professionals. Innovative Projects * : Cutting-edge technologies with national and international impact. Close-knit Environment * : Direct communication and collaborative work. Flexibility and Work-Life Balance * : Hybrid model adapted to your pace. Career Development Plan * : Professional growth and continuous training (Open University, Udemy for Business). Exclusive Benefits * : Discounts on leisure, sports, and wellness. Competitive Compensation and Flexible Reward Plans * tailored to your needs. **What does our selection process look like?**Profile Review * : We assess your experience and skills to determine whether you match what we’re seeking. Initial Contact (5–10 min) * : If you receive a call from an unknown number, it’s our team! It will be a brief conversation to get to know you and address any questions. Technical Interview : You’ll meet with the team, who will explain the project and daily tasks. We’ll also explore your technical knowledge. Additionally, we’ll conduct brief psychological and English competency assessments (if required). Offer and Onboarding * : If everything goes well, you’ll join our team and begin this new chapter together! **Estimated Duration: 1–2 weeks.** *Our commitment is to foster workplaces where people are treated with respect and dignity, promoting professional development of our staff and ensuring equal opportunities in recruitment, training, and promotion, providing a work environment free from any discrimination based on gender, age, disability, sexual orientation, gender identity or expression, religion, ethnicity, marital status, or any other personal or social circumstance.* Indra is a Top Employer 2025! Join a company certified as one of Spain’s best employers, thanks to our comprehensive HR management and the conditions we offer our professionals.