Core Systems Test Engineer

TITLE: Core Systems Test Engineer
POSITION TYPE: Full Time (W2)
LOCATION: Fort Morgan, CO
ABOUT WorldLink:
WorldLink is a rapidly growing information technology company at the forefront of the tech transformation. From custom software development to cloud hosting, from big data to cognitive computing, we help companies harness and leverage today’s most cutting-edge digital technologies to create value and grow.
Collaborative. Respectful. Work hard Play hard. A place to dream and do. These are just a few words that describe what life is like at WorldLink. We embrace a culture of experimentation and constantly strive for improvement and learning.
We take pride in our employees and their future with continued growth and career advancement. We put TEAM first. We are a competitive group that like to win. We're grounded by humility and driven by ambition. We're passionate, and we love tough problems and new challenges. You don't hear a lot of "I don't know how" or "I can't" at WorldLink. If you are passionate about what you do and having fun while doing it; tired of rigid and strict work environments and would like to work in a non-bureaucratic startup cultural environment, WorldLink may be the place for you.
For more information about our craft, visit https://worldlink-us.com .
WHO we’re looking for:
We are looking for a Core Systems Test Engineer who will be responsible for performing system integration and interoperability tests, supporting customer acceptance tests, and providing field deployment support for NFV-based 5G SA/NSA core systems. The Core team is particularly interested in candidates with extensive expertise in Mobile Networks Subscriber and Policy Operations, including experience with subscriber database migration.
Role and Responsibilities:

• System-level feature integration and verification.
  
• Inter-operability tests with external elements.
  
• Developing and performing test plans.
  
• Troubleshooting and analyzing problems in customer’s lab and production systems.
  
• New system deployment and commissioning new system.
  
• Migration of network systems.
  

Required Experience and Education:

• BS/BE in Computer Science or Computer Engineering w/5 years of telecommunication industry experience or MS in Computer Science or Computer Engineering w/3 years of telecommunication experience.
  
• Hands-on experience in technical support, troubleshooting, and operational support of 3G/4G mobile subscriber and policy management systems (HLR/HSS).
  
• Hands-on experience in configuration, troubleshooting and analysis of end-to-end flow and processes between user SIM, subscriber management UI/portal, and HLR/HSS.
  
• Proficiency in LTE and 5GC call flow diagnostics.
  
• Expertise in using Wireshark or other IP protocol analyzers.
  
• In-depth understanding of EPC and SA/NSA 5GC architecture.
  
• Experience in debugging LTE and 5G SA/NSA call flows.
  
• Hands-on experience in operational management of mobile network subscriber and policy management systems.
  
• Familiarity with the service-based architecture and 5G SA cloud-native core network functions.
  
• Proficiency in LTE and 5GC call flow diagnostics.
  
• Knowledge of LTE core interfaces such as S1, S6a, S11, DNS, Gx, Gy, S2a, S5/S8, S6b, SGi, S1-U, NAS, GTP-U, GTP, DIAMETER, RADIUS, etc.
  
• Understanding of SIP, IMS, and IP telephony standards.
  
• Experience with VoLTE and Deep Packet Inspection.
  
• Strong knowledge of IP protocols, including IPv6, TCP/IP, UDP, ECMP, OSPF, BGP, VLAN, IPSec, NAT, IP forwarding.
  
• Familiarity with Tomcat and web GUI is beneficial.
  
• Exposure to programming in Python, Java, Perl, and Unix/Linux shell scripting is advantageous.
  
• Expertise in using Wireshark or other IP protocol analyzers.
  
• Experience in Cisco router configuration is a plus.
  
• Understanding of technologies like OpenStack, OpenShift, DevOps, NFV, CNF, and Kubernetes is beneficial.
  

Necessary Skills and Attributes:

• Self-motivated individual with the ability to thrive in a team-based or independent environment.
  
• Detail-oriented with strong organization skills.
  
• Ability to work in a fast-paced environment.
  
• Limited supervision and the exercise of discretion.
  
• Network administration skills are advantageous.
  

Physical Demands:
The physical demands described here are representative of those that must be met by contract employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.
While performing the duties of this job, the contract employee is occasionally required to stand, clean, crawl, kneel, sit, sort, hold, squat, stoop, stand, twist the body, walk, use hands to finger, handle, or feel objects, tools or controls, reach with hands and arms, climb stairs or ladders and scaffolding, talk or hear, and lift up to 20 pounds. Specific vision abilities required by the job include ability to distinguish the nature of objects by using the eye. Operate a computer keyboard and view a video display terminal between 50% - 95% of work time, including prolonged periods of time. Requires considerable (90%+) work utilizing high visual acuity/detail, numeric/character distinction, and moderate hand/finger dexterity.
Performs work under time schedules and stress which are normally periodic or cyclical, including time sensitive deadlines, intellectual challenge, some language barriers, and project management deadlines. May require working additional time beyond normal schedule and periodic travel.
WHAT we’ll bring:
During your interview process, our team can fill you in on all the details of our industry-competitive benefits and career development opportunities. A few highlights include:

• Medical Plans
  
• Dental Plans
  
• Vision Plan
  
• Life & Accidental Death & Dismemberment
  
• Short-Term Disability
  
• Long-Term Disability
  
• Critical Illness/ Accident/ Hospital Indemnity/ Identity Theft Protection
  
• 401(k)
  

WHAT you should know:
Our success begins and ends with our people. We embrace diverse perspectives and value unique human experiences. WorldLink is an Equal Employment Opportunity and Affirmative Action employer. All employment at WorldLink is decided on the basis of qualifications, merit, and business need. We endeavor to continue our footprint as a diverse organization by highlighting opportunities for all people. WorldLink considers applicants for all positions without regard to race, color, religion or belief, sex, (including pregnancy and gender identity), age, national origin, political affiliation, citizenship status, marital status, military/veteran status, genetic information, sexual orientation, gender identity, physical or mental disability or any other characteristic protected by applicable laws. People with disabilities who need assistance with any part of the application process should contact us.
This job description is designed to cover the main responsibilities and duties of the role but is not designed to be a comprehensive list of all.