System Technical Architect and solution delivery for IoT Mobile Core (4G/5G Data, IMS, SMS)

Publication date : Jun 30, 2026, 12:00AMContract duration : Orange Business is here!About usJoin us at Orange Business!We are a network and digital integrator that understands the entire value chain of the digital world, freeing our customers to focus on the strategic initiatives that shape their business.Every day, you will collaborate with a team dedicated to providing consistent, sustainable global solutions, no matter where our customers operate. With over 30,000 employees across Asia, the Americas, Africa, and Europe, we offer a dynamic environment to develop and perfect your skills in a field filled with exciting challenges and opportunities.About the roleContextIn thecontext of new IoT offers development, Orange aims at building and operating a new Mobile core dedicated to IoT. This platform is mainly composed of a mobile 4G/5G core network, an IMS solution and SMSC platform, relying on a cloud-native Kubernetes infrastructure, and will support 4G/5G data, voice, and SMS services.In that context, we are looking for “a System Technical Architect” acting as an end-to-end solution implementation leader, defining, implementing and maintaining the execution-level architecture.Main ResponsibilitiesIn collaboration with the Solution architect (in charge of HLD), with ‘Telco cloud infrastructure team’ and telecom & IT engineering teams:Translate high-level architecture and system requirements into detailed and implementable Low-Level Design (LLD) including: Overall Kubernetes infrastructure design (as a consumer of the infrastructure: including CNF deployment patterns, namespace and isolation strategies, networking, security and RBAC policy implementation…) Main application-level configurations of telecom components (data core network, IMS, SMSC functions, signalling and roaming function etc…)Flow matrix, networks, IP address plan, security policy for the overall architecture including interworking with external network and systemsManage capacity planning according to traffic forecastsEnsure that the system is observable, traceable, and perform low-level design of monitoring / observability, tracing tools with concerned expertsEnsure that the architecture is secured by design in strong coordination with security teamManage the delivery of the solution by:Working closely with infrastructure teams in charge of K8S cluster build and operationsCoordinating the “engineering teams” of the project (per sub-system) to ensure that the vertical and horizontal integrations are done and validated step-by-stepManaging dependency with external teamsUnderstanding and applying Orange processes for obtaining IP pools, feeding referentials, opening flows across different networks and build complex end-to-end integrationsRefining architecture when integration issue at met, in coordination with the system architect and engineering teamsStructure and maintain documentation and version architecture evolutionsContribute and provide support to “Qualification team” by:Defining the target call flows for Voice, data, SMS servicesContribute to the definition of the testing strategy,Supporting for complex integration issues, troubleshooting, traces analysisAbout youRequired SkillsTechnical skills:Telecom system expertise (mandatory): 4G EPC / 5G Core (5GC), IMS / VoLTE / SMS architectures, signaling protocols (SIP, Diameter, HTTP/2 SBA)IP/Infra low-level architecture design skills (flow matrix elaboration, IP/MPLS Networking, security architecture, resilient architecture implementation…)Cloud-native & Kubernetes/dockers skills (consumer level)Complex integration & troubleshooting skills, security & operability awareness (design for security, observability, easy operation)DevOps practices awarenessNon-technical skills:Ability to work in a large and complex organizationHigh skills of communication to interact with several teams, in an international contextHigh skill of self-organization and low detail handlingAbility to analyze / compare / propose decisions on complex architectural topicsAbility to document and to organize / structure documentation efficientlyProfileSenior technical architect with 10 years experiencesignificant experience as a technical system architect in a large-scale mobile projectEngineering degree or equivalent in telecommunications, computer science, or related fields.You bring rigor, passion for challenges, and determination. You seek the opportunity to expand your expertise, achieve your goals, and thrive.What we offer• Global Opportunities: Work in multi-national teams with opportunity to collaborate with colleagues and customers from all over the world.• Flexible Work Environment: Flexible working hours and possibility to combine work from office and home (hybrid ways of working).• Professional Development: training programs and upskilling/re-skilling opportunities.• Career Growth: Internal growth and mobility opportunities within Orange.• Caring and Daring Culture: Health and well-being programs and benefits, diversity & inclusion initiatives, CSR and employee connect events.• Reward Programs: Employee Referral Program, Change Maker Awards.Only your skills matterRegardless of your age, gender identity, race, ethnic origin, religion/belief, sexual orientation, marital status, neuroatypia, disability, veteran status or appearance, we encourage diversity within our teams because it is a strength for the collective and a vector of innovation. Orange Group is a disabled-friendly company and equal opportunity employer: don't hesitate to tell us about your specific needs. At Orange, only your skills matter. Regardless of your age, gender, background, origin, religion, sexual orientation, disability, neurodiversity, or appearance, we actively encourage diversity within our teams, as it is a collective strength and a driver of innovation.Orange is a disability-inclusive employer: please feel free to let us know about any specific needs you may have.