Specialist System Engineering (IMS Voice Core)

att; Bengaluru; On-site; INR 2,600,000 - 4,800,000; Full time

Job summary

AT&T is seeking an experienced Mobility Core & Network Engineer in Bengaluru to architect, design and certify containerized network functions on Red Hat OpenShift. You will work with Nokia applications (NAC, NIAM, CNCS, CSCF, SBС, ECSCF) within the ngUSP suite and collaborate with SMEs and cross-functional teams globally.

The role emphasizes troubleshooting, virtualization, IaC, and secure, scalable delivery of end-to-end wireless services with a strong emphasis on high availability and

Qualifications

• Deep understanding of Nokia NIAM and NAC.
• Deep understanding of IMS, SIP, Diameter flows.
• Deep understanding of CNCS, NTAS, CSCF and SBC components.
• Experience in call flow troubleshooting and triage.
• Familiar with virtualization, containerization and IaC concepts.
• Proficient with Red Hat OpenShift and cloud platforms.
• Programming skills: Python, Ansible, shell, JS or Java.
• Experience with security auditing and RBAC concepts.
• Knowledge of data encryption and logging practices.
• CI/CD familiarity and Git basics.

Responsibilities

• Architect, design, integrate and certify containerized network functions on Red Hat OpenShift infrastructure.
• Work on Nokia applications such as NAC, NIAM, CNCS, CSCF, SBC, ECSCF within ngUSP.
• Collaborate with subject matter experts and supporting teams to deliver solutions.
• Support testing, validation and performance tuning for high availability.

Skills

IMS knowledge

SIP & Diameter

Networking concepts

Linux administration

CI/CD

Scripting (Python/ shell/ JS)

IaC concepts

Troubleshooting call flows

Security auditing

Git basics

Education

Bachelor's Degree in STEM

Tools

Red Hat OpenShift

Nokia CNCS

NIAM

NAC

NTAS

CSCF

SBC

Nokia Cloudband

NCS

Azure

Job description

Job Responsibilities

Mobility Core and Network Engineering team is part of the Network CTO organization that oversees the global mobile and fixed network technology direction for AT&T, which includes the design of the company's 5G and IMS infrastructure.

This team is responsible for the architecture, design, certification, testing and delivery of advanced Mobility Core network functions and Network Services applications, including for IP multimedia systems and packet data, which are the future of Mobility services and experiences. The team contributes to the growth and development of end-to-end wireless network services across Consumer, Enterprise, Internet of Things (IOT), FirstNet and public sector products.

In this role, you will work on architecture, design, integration and platform certification on containerized network functions on RedHat OCP infrastructure . The role will be responsible for one or more Nokia applications such as Automation and Control (NAC), Identity and Access Manager (NIAM ), Cloud Native Communication Suite (CNCS), Call Session Control Function (CSCF), Stir-Shaken (S/S), and Emergency CSCF (ECSCF) within the ngUSP solution. You will work closely with subject matter experts from our team as well as supporting teams.

Job Qualifications / Required Qualifications

• Deep understanding of Nokia Identity and Access Management (NIAM) and Nokia Automation and Control (NAC)
• Deep understanding of the IP Multimedia Sub-systems (IMS), SIP , Diameter flows.
• Deep understanding of Nokia Cloud Native Communication Suite (CNCS), Nokia Telcom Application Server (NTAS), Call Session Control Function (CSCF) components, Nokia Session Border Controller (SBC).
• Deep understanding of call flow troubleshooting and triage
• Deep understanding of virtualization, containerization, and Infrastructure as Code ( IaC ) concepts
• Skilled in various cloud platforms, e.g., Nokia Cloudband , Redhat OpenShift (OCP), Nokia Container Services (NCS), Microsoft Azure
• Skilled in programming skills in a language like Python, ansible, shell scripting, JavaScript, or Java
• Experienced in data encryption, security audit, Role based access control.
• Good knowledge of networking concepts
• Experience in test planning and execution
• Experience with performance engineering, profiling and tuning to meet High-Availability needs.
• Understanding of Data Analytics, data visualization.
• Good experience in Alarm treatment, analysis, and ticket generation.
• Experience with Continuous Integration/Continuous Deployment (CI/CD), Software Development & Delivery.
• Administrator level expertise in Linux .
• Experienced in YAML and JSON file types and their usage.
• Basic familiarity of GIT.

Preferred Qualifications

• Bachelor's Degree in a STEM discipline e.g. Computer Science, or Engineering.
• Basic understanding of telecommunications, network architecture, and wireless communication protocols
• Exposure to network analysis and telecom-specific data sources.
• Familiarity network and application security concepts and methods
• Artificial Intelligence/Machine Learning (not mandatory but a plus):
• Awareness of machine learning frameworks and concepts.
• Basic understanding of mathematics relevant to AI/ML.
• Familiarity with data preprocessing and model evaluation techniques.
• Interest in learning new tools and technologies.
• Excellent communication skills (written and oral) and intercultural communication abilities.
• Must have a win as one attitude, to work as a team to carry out projects on time with quality

Additional Job Information

This is an offshore role that requires daily collaboration with U.S. stakeholders, including overlapping work hours to ensure effective partnership and meet business needs.

Weekly Hours: 40

Time Type: Regular

Location: IND:KA:Bangalore / Epip Area, Hoodi Village, Whitefield Rd - Eqp: Plot 111/112, Epip Area, Hoodi Village, Whitefield Road

AT&T and its subsidiaries are committed to equal employment opportunity. All hiring, promotion, and other employment decisions remain merit-based and free from discrimination on the basis of race, color, religion, religious creed, national origin, ancestry, age, sex, sexual orientation, gender, gender identity, gender expression, physical disability, mental disability, pregnancy, medical condition, etc.

AT&T will provide reasonable accommodations to qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made.