Waseem (Waseem) Sattar-Enterprise Solution Architect |5G / Mobile Communications|Mission Critical Services (MCx)|IMS and SIP
Check rate
Experience
Solution Architect / Subject Matter Expert
FRMCS terminal device manufacturer
Participation in the EU-funded MORANE-2 project to validate the Future Railway Mobile Communication System (FRMCS) in real-life use cases: creation of the requirement specifications for TOBA as well as the associated test specifications.
Technologies: 5GS (Radio & Core), FRMCS, MCx (MCPTT, MCData, MCVideo), MC Gateway UE, MCx Priority/Security/QoS Management, ETCS, SIP, IMS
Solution Architect
Mobile security organization (NDA)
Consulting analysis of current 3GPP SA3 developments regarding security threats and solution approaches - including satellite communications, ACME, Non-3GPP Roaming, ProSe, MPQUIC/MPTCP, 5G APIs (CAPIF, CAMARA, GSMA Open Gateway), PLMN-NPN and Ranging/SL Positioning (V2X).
Technologies: 5G, satellite communications, ACME, CAPIF, CAMARA, GSMA Open Gateway, PLMN-NPN, ProSe, V2X
Solution Architect / Subject Matter Expert
International railway service provider
Technical representation of the client in ETSI/UIC standardization and overall responsibility for the FRMCS system definition as the master document for all following requirement specifications.
- Standardization contributions to end-to-end QoS (5QI, session continuity), roaming architecture (Local Breakout / Home Routed), border crossing and MCx migration
- FRMCS system definition: services, components and interaction of transport, core and service layers including security, GSM-R interworking and Kubernetes-based deployment
- MCx requirement specification to replace analog train radio over public mobile networks
- Stakeholder management: alignment, mediation of complex solution details and obtaining management decisions
Technologies: 5GS (Radio & Core), FRMCS, MCx, MC Gateway UE, MCx Priority/Security/QoS/Configuration Management, ETCS, SIP, IMS
5G & OSS Solution Architect
International railway service provider
Design of an event-driven OSS for FRMCS that supports FRMCS and GSM-R in parallel during the migration phase - including gap analysis of operational processes. In addition, creation of the requirement specification for the company-wide xG in-house tender (technical, operational and SLA aspects) including pricing models and suitability criteria for vendor selection. Target picture: decoupled, containerized microservices instead of OSS silos, workflow-based service design (DevOps) and seamless integration of any OSS components.
Technologies: 5G, IMS, FRMCS, MCx, Interworking Function (IWF), OSS, Event-Driven Architecture, Kubernetes
Solution Architect – 5G Security & Future Networks
Freelance Enterprise & Solution Architect
Consulting and architecture support for new 5G security requirements, API ecosystems, open gateway initiatives and future network technologies
Solution Architect – FRMCS & Digital Transformation in the Railway Sector
Freelance Enterprise & Solution Architect
Responsible for the architecture and strategic direction of the Future Railway Mobile Communication System (FRMCS) in the international railway environment. Managing architecture activities, requirements management, stakeholder alignment, and standardization bodies.
Key Contributions
- Defined the end-to-end system architecture for FRMCS across transport, core, service, and operations domains.
- Created target architectures, architecture roadmaps, and operating models.
- Conducted architecture workshops and technical governance with international stakeholders.
- Created architecture diagrams, integration concepts, requirement specifications, and technical roadmaps.
- Designed an event-driven OSS architecture for future operations processes.
- Advised on topics such as QoS, security architecture, API integration, cloud-native deployment, and interoperability.
Enterprise Solution Architect – Private 5G Platform
NTT DATA Deutschland
Responsible for the architecture, integration, testing, commissioning, and handover to operations of a fully containerized Private 5G platform. Technical main point of contact for customers and project teams.
Key Contributions
- End-to-end responsibility for the project lifecycle from architecture to live operations.
- Developed a scalable Kubernetes-based cloud-native architecture.
- Managed technology partners, infrastructure vendors, and customer representatives.
- Led installation, integration, testing, and acceptance activities.
- Defined network, routing, VLAN, and deployment architectures.
Technical Lead – Test Automation & DevOps
NTT DATA Deutschland
- Developed solution approaches and technical proposals for customers.
- Conducted requirements workshops and architecture presentations.
- Integrated automated tests into Jenkins-based CI/CD pipelines.
- Supported customers through technical acceptance and rollout
Senior Consultant / Enterprise Solution Architect
Sopra Steria Consulting
Led multiple transformation programs for international telecommunications companies with a focus on OSS modernization, SDN introduction, data migration, cloud transformation, and integration architectures
Key Contributions
- Developed target architectures and strategic architecture roadmaps.
- Created high-level and low-level designs for business-critical systems.
- Planned and managed complex data migration and integration programs.
- Defined strategies for SDN, NFV, and cloud transformations.
- Conducted impact analyses, architecture reviews, and stakeholder management.
- Designed data anonymization, encryption, and secure data exchange methods.
System Engineer / Technical Lead
Tieto Deutschland GmbH
Responsible for OSS, fulfillment, provisioning, integration, and test automation solutions for international telecommunications providers
Key Contributions
- Technical subject matter expert for OSS fulfillment and operational support solutions.
- Worked closely with customers on-site for installation, integration, and troubleshooting.
- Responsible for test planning, commissioning, and production support.
- Developed and integrated adapters and middleware components.
- Conducted system tests, acceptance tests, and fault analysis
VoIP Engineer
Cross Solution
Master’s thesis – integration of a universal VoIP middleware server. Implementation of Asterisk as a universal telephony server (VoIP, ISDN BRI/PRI, GSM, analog), including the development of a web-based administration interface for Asterisk, with MySQL integration, as well as integration of Text-to-Speech (TTS), Interactive Voice Response (IVR), and Speech to Text (speech recognition).
Technologies: Asterisk, SIP, Asterisk-Java API, MySQL, Festival/Cepstral (TTS), Sphinx/LumenVox (ASR) – Speech to Text, Eclipse, Maven, BIRT chart for reporting.
Industry experience
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Experienced in Telecommunication, Information Technology, and Transportation.
Business area experience
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Experienced in Information Technology, Strategy, Operations, Quality Assurance, Project Management, and Product Development.
Summary
Freelance Solution Architect and Subject Matter Expert with over 17 years of experience in mobile and fixed-line telecommunications, as well as IT-side platform integration (microservices, API gateways, databases, Linux infrastructure) - TOGAF Certified Enterprise Architect (No. 123381).
Focus areas: FRMCS, 5G (Radio, Transport, Core) and Mission Critical Services (MCPTT, MCData, MCVideo, MCx Security and QoS Management). Responsible for the complete FRMCS system definition for an international railway service provider as the master document for all downstream requirement specifications; active representation of the client in the standardization bodies of ETSI and UIC; currently responsible in the EU project MORANE-2 for TOBA requirement and test specifications.
OSS transformation: design of an event-driven, containerized OSS architecture to replace legacy silos, including gap analysis from GSM-R to FRMCS and support for the parallel operation of both domains. Architect and technical project lead for the cloud migration of the OSS landscape (Cloud Native, Domain Driven Design, Kubernetes, DevOps).
Integration and data: coordination of vendor-independent interfaces (MTOSI, TM Forum SID, REST/OpenAPI), introduction of a vendor-agnostic SDN infrastructure in the transport network, and design of CDR data integration from the data center into Google Cloud Platform including anonymization and encryption.
Roadmap and rollout: creation of requirement specifications, pricing models and suitability criteria for large-scale tenders, as well as end-to-end planning, design and commissioning of EPC sites, VoLTE, SRVCC and IPv6.
Fluent in German and English, experienced in cross-border, intercultural project work.
Skills
Solution Architect
Enterprise & Solution Architecture (Togaf)
5g
Mission Critical Services (Mcx)
Frmcs & Railway Communications
Oss (Operation Support System)
Standardization & Committee Work
5g / Mobile Communications
Mobile Security (3gpp Sa3) Satellite Communications/Ntn · Acme · Non-3gpp Roaming · Prose (D2d) · Mpquic / Mptcp · Ranging & Sl Positioning (V2x) · Security Analysis Of New 3gpp Developments
5g Apis & Exposure Capif (3gpp Common Api Framework) · Camara · Gsma Open Gateway · Rest, Openapi, Tmf Open Apis
Data Architecture & Data Integration
Event-Driven Architecture
Microservices & Domain Driven Design (Ddd)
Cloud-Native & Hybrid Cloud Solutions
Requirements Engineering
Api And System Integration
Devops & Ci/Cd
Data Migration & Data Governance
Linux/Unix Platforms
Technical Leadership & Coaching
Digital Transformation
Architecture
Togaf Enterprise Architecture
Solution Architecture
Data Architecture
Integration Architecture
Cloud Architecture
Domain Driven Design (Ddd)
Distributed Systems
Microservices
Event-Driven Architecture
Api-First Design
High Availability
Scalable Platforms
Enterprise Integration
Cloud & Devops
Kubernetes
Docker
Jenkins
Git
Ci/Cd Pipelines
Devops
Infrastructure Automation
Data & Integration
Data Architecture
Data Migration
Data Integration
Data Governance
Data Validation
Data Anonymization
Data Management
Technologies
Oss/Bss
Sdn
Nfv
5g
Frmcs
Ims
Rest
Openapi
Wso2 Api Manager
Oracle
Mysql
Operating Systems
Linux
Red Hat Enterprise Linux
Ubuntu
Centos
Unix Administration
Shell-Scripting
Languages
Education
University of Applied Sciences Mittelhessen
Master of Information and Communication Engineering · Information and Communication Engineering
Specialized in Information and Communication Engineering, with main Focus in Telecommunications (Wireless Communication, VoIP, SIP, RTP)
University of Central Punjab
Master of Computer Science · Computer Science
Certifications & licenses
The Open Group
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Waseem is based in Frankfurt am Main, Germany and can operate in on-site, hybrid, and remote work models.
Waseem speaks the following languages: Urdu (Native), German (Advanced), English (Advanced).
Waseem has at least 19 years of experience. During this time, Waseem has worked in at least 10 different roles and for 8 different companies. The average length of individual experience is 2 years and 9 months. Note that Waseem may not have shared all experience and actually has more experience.
Based on recent experience, Waseem would be well-suited for roles such as: Solution Architect / Subject Matter Expert, Solution Architect, 5G & OSS Solution Architect.
Waseem's most recent position is Solution Architect / Subject Matter Expert at FRMCS terminal device manufacturer.
In recent years, Waseem has worked for FRMCS terminal device manufacturer, Mobile security organization (NDA), International railway service provider, Freelance Enterprise & Solution Architect, and NTT DATA Deutschland.
Waseem is most experienced in industries like Telecommunication, Information Technology, and Transportation.
Waseem is most experienced in business areas like Information Technology, Strategy, and Operations. Waseem also has some experience in Quality Assurance, Project Management, and Product Development.
Waseem has recently worked in industries like Telecommunication, Information Technology, and Transportation.
Waseem has recently worked in business areas like Information Technology, Strategy, and Operations.
Waseem attended University of Applied Sciences Mittelhessen for Information and Communication Engineering.
Waseem has 1 certificate: TOGAF Certified Enterprise Architect.
Waseem is immediately available full-time for suitable projects.
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Calculated based on our freelancers’ daily rates as of 4 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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