We are looking for a Mobile Core Solution Engineer to join our SIM for Things (SFT) team. In this role, you will drive the analysis, end-to-end design, development, and delivery of core mobile network solutions for general IoT connectivity. You will bridge high-level technical architecture with hands-on delivery, aligning solutions with business, operational, regulatory, cost, and time-to-market objectives.

Working across cross-functional teams, you will evaluate technology options, balance vendor capabilities with in-house integration, and take end-to-end ownership from requirements engineering to production rollout. You will play a pivotal role in performing technical assessments, executing complex call-flow analyses, and guiding platform evolutions.

Tasks Description:

- Review, validate, and design technical solutions to ensure alignment with business, regulatory, operational, budget, and time-to-market constraints.
- Lead technical platform development, contribute to product roadmaps, and perform technical assessments for network evolutions.
- Drive end-to-end implementation projects across the lifecycle, coordinating with stakeholders on solution design, rollout, integration, and operational handoff.
- Balance third-party/vendor capabilities with internal software development and integration efforts.
- Draft and review detailed functional and technical specifications, integration guidelines, and RFP documents.
- Perform architecture and impact analyses, defining operational methods, procedures, and documentation for product, marketing, and operations teams.
- Apply deep call-flow analysis and troubleshooting expertise to solve complex core network, protocol, and interoperability issues.
- Act as a technical authority and reference point for internal and external stakeholders,



providing expert guidance and building trust across teams.

Experience & technical expertise:

- Degree in Telecommunications, Computer Science, IT Engineering, or equivalent experience.
- 6+ years of professional experience in telecom, IT, or mobile connectivity environments, with a strong blend of design and implementation skills.
- Solid end-to-end understanding of mobile core network architectures (2G, 3G, 4G LTE, and 5G Core) across traditional and cloud environments (AWS, Azure, or Google Cloud).
- Strong protocol and signaling expertise across HTTP, SS7, Diameter, MAP, INAP, and GTP.
- Hands-on familiarity with SIM/eSIM ecosystems, including eUICC, SM-DP/SM-SR, SM-DP+, SIM applets, and Over-The-Air (OTA) provisioning.
- Proven experience conducting end-to-end call-flow analysis, network troubleshooting, and integration testing.
- Broad understanding of the international carrier landscape, IoT/M2M platforms, roaming, and MVNO/MVNE environments.

Nice to have:

- Direct experience with specific mobile core components (e.g., P-GW/GGSN, HSS/HLR, PCRF, UPF, AMF, SMF).
- Prior experience delivering complex telecom solutions on time and within scope.
- Familiarity with containerized microservices and cloud-native network deployments.

Soft skills

- Strong technical communication, negotiation, and presentation skills—able to bridge technical detail and business context.
- Self-driven, autonomous contractor mindset with high ownership and a commitment to delivery timelines.
- Structured, analytical problem solver comfortable navigating technical complexity.
- Excellent team player experienced in working within international, multi-cultural environments.
- Proactive approach to risk management, platform optimization, and stakeholder alignment.

📌 Mobile core solution engineer (España)
🏢 Innova Solutions
📍 España