Secure Communications Engineer - Alcobendas, Hybrid

Description

Job Summary: Secure Communications Engineer to design, implement, and validate critical communications and encryption solutions in strategic Defense-area projects. Key Highlights: 1. Long-term projects in the Defense sector 2. You will contribute to cutting-edge solutions with national and international impact 3. Personalized career plan and continuous training **Location:**Madrid, MD, ES **Professional Profile:** Defense and Security **Required Experience:** More than 2 years of experience **Work Mode:** Hybrid At Indra Group, we **protect what matters most**. We lead the development of cutting-edge technological solutions that strengthen national and international security. **Join our Secure Communications team!** We are seeking a **Secure Communications Engineer** to join strategic projects where critical communications and encryption solutions are designed, implemented, and validated. You will become part of a highly specialized team within the Defense area. **What will you do?** * Analyze, design, and review secure communications configurations (TLS, VPN, IPsec, mTLS). * Perform advanced network troubleshooting (tcpdump, Wireshark, routing, NAT, DNS, MTU…). * Define and evaluate threat models: MITM, replay, spoofing, hijacking, etc. * Manage applied cryptography implementation (AES\-GCM, ChaCha20\-Poly1305, RSA/ECDSA/Ed25519, ECDHE…). * Administer and review certificates: renewal, revocation, OCSP/CRL, and trust chains. * Produce technical documentation: trust diagrams, encryption decisions, risks, and mitigations. * Collaborate with network, systems, and development teams to ensure correct integration of secure solutions. * Identify poor practices and propose improvements based on technical audits. **What are we looking for?** Don’t worry if you don’t meet 100% of the requirements. **Go ahead and apply! We want to get to know you and see what you can bring.** **Essential Requirements**: ✅ Bachelor’s degree in Computer Engineering, Telecommunications Engineering, or related fields. ✅ Minimum **2 years of experience** in secure communications and applied cryptography. ✅ Solid understanding of networking fundamentals: TCP/IP, basic routing, NAT, DNS, MTU. ✅ Experience with diagnostic tools (tcpdump/wireshark). ✅ Knowledge of segmentation, firewalls, proxies, and load balancers. ✅ Conceptual and practical mastery of symmetric, asymmetric, and hashing cryptography. ✅ Experience with TLS 1\.2/1\.3, mTLS, IPsec (conceptual), VPNs (WireGuard / OpenVPN). ✅ Certificate management and knowledge of PKI and key lifecycle. ✅ Ability to clearly and understandably explain cryptographic risks. ✅ Availability to work under a **hybrid model with 40% on-site presence in Alcobendas**. **What we offer** * **Stability and Future ✨**: Long-term projects in the Defense sector, with over 50\.000 professionals in Indra Group. * **Innovative Projects**: You will contribute to cutting-edge solutions with national and international impact. * **Close-knit Environment**: Direct communication, collaborative teams, and an open atmosphere. * **Autonomy and Flexibility**: Real autonomy in organizing your work within the hybrid model (40% on-site annually). * **Personalized Career Plan**: Professional growth tailored to you. * **Continuous Training**: Access to Open University and Udemy for Business (over 6\.000 courses). * **Employee Benefits**: Discounts on gyms, retail, restaurants, leisure, etc. * **Competitive Compensation** and flexible compensation plans. **What does our selection process look like?** * **Profile review** * **Initial contact (5–10 min)** * **Interview with Talent Acquisition** * **Technical interview with the team** * **Offer and onboarding** * **Approximate duration of the process: 2 weeks.** *Our commitment is to foster workplaces where people are treated with respect and dignity, supporting professional development and guaranteeing equal opportunities in selection, training, and promotion—ensuring a workplace 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.