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Kubernetes Networking Deep Dive
Kubernetes Networking Deep Dive
CloudDevOpsKubernetes
Understanding pod-to-pod communication, ingress controllers, and service mesh patterns in production clusters.
Profile
About Me
PersonBuilder
.setName("Yujing Gao")
.setAge(0.000000000)
.setGender(Gender.MALE)
.setJob("Software Engineer Senior")
.isAppleFan(true)
.addInterests(
List.of("Coding", "Gym")
)
.addEducation(
new Degree(
"B.S. in Computer Science",
"CSU, Columbus, GA",
"May 15th, 2020"
),
new Degree(
"M.S. in Computer Science",
"CSU, Columbus, GA",
"Aug 4th, 2021"
)
)
.build();Writing
Popular Posts
Building a Type-Safe API with tRPC
TypeScriptBackendAPI
End-to-end type safety without code generation — a practical walkthrough of tRPC in a Next.js monorepo.
Observability in Distributed Systems
CloudDevOpsMonitoring
Traces, metrics, and logs — the three pillars and how to wire them together with OpenTelemetry.
The Mental Model Behind Rust's Borrow Checker
RustSystems
Ownership and lifetimes demystified: once you see the invariants, the compiler becomes your best friend.
DynamoDB Single-Table Design
AWSDatabaseCloud
Access patterns first, schema second — a counterintuitive approach that scales to billions of items.
Life Journey
Timeline
SIG/FIS-CL
Software Engineer Senior
FISJacksonville, FL
Designing resilient clearing and settlement systems for high-volume transaction processing.
- Fault-tolerant workflows for clearing and settlement
- Large transaction datasets modeled and processed with Spark
- Batch reliability patterns similar to Global Payments core processing
- Failure recovery, replay, and operational visibility for payment flows
SIG/GEORGI
M.S. Computer Science
Georgia TechOnline
Pursuing a second CS master's with a machine learning focus.
- Semester starts Jan 2026
- Studying machine learning and applied AI systems
- Building stronger CS theory depth alongside production experience
- Expected graduation Dec 2027
SIG/GLOBAL
Software Engineer Senior
Global PaymentsColumbus, GA
Built modern payment platforms that moved core batch processing beyond legacy mainframes.
- Distributed payment processing services on AWS
- Kafka, Airflow, Spark, and Java Spring for core batch architecture
- Posting and financial control logic rebuilt from legacy behavior
- Self-healing retries, observability, and fault-tolerant job orchestration
SIG/AFLAC-
IT Apprenticeship
AflacColumbus, GA
Built enterprise Java services and learned legacy modernization from the inside.
- J2EE and WebSphere services for enterprise integrations
- Mainframe modernization patterns from COBOL-era systems
- Parallel API testing workflows for faster validation
- Early foundation in production Java and service reliability
SIG/CSU-ST
Graduate Assistant
Columbus State UniversityColumbus, GA
Mentored STEM students while sharpening communication and coaching skills.
- Course support, tutoring, and lab guidance
- One-on-one mentoring for STEM students
- Teaching through problem solving instead of memorization
- Clearer technical communication through repeated coaching
SIG/CSU-DE
B.S. and M.S. Computer Science
Columbus State UniversityColumbus, GA
Built the foundation for software engineering, systems, and applied CS work.
- Software development graduate track
- Systems, algorithms, databases, and application design
- Undergraduate and graduate CS foundation
- Project-heavy coursework that shaped practical engineering habits
SIG/IEEE-S
IEEE SoutheastCon
Published ResearchHuntsville, AL
Published NFC-based multi-factor authentication research.
- Mobile HCE authentication with NFC
- AES-backed Windows login prototype
- pGina integration for custom authentication flow
- Research presented through IEEE SoutheastCon
Selected Work
Personal Projects
IEEE SoutheastCon
Published paper on 2019 IEEE SoutheastCon entitled Multi-Factor Stateful Authentication using NFC and Mobile Phones. The project implemented a Windows Authentication System using technologies like AES Encryption, pGina, and Android Host-based Card Emulation.
Explore ProjectChina Cafe Restaurant
Help a local family-owned business design and implement online menu system. The system allows customers to place an order online and restaurant owner will get notified by email. Frameworks like React and Redux are used for handling large and complex menu dataset.
Explore ProjectMaster the Mainframe
Participated in the 2019 Master the Mainframe competition hosted by IBM and was recognized as 2019 Global Part 2 Winners and Part 3 Finishers. Through this experience, I gained knowledge of various mainframe programming languages, including Mainframe Assembler, JCL, and COBOL.
Explore ProjectKind Words
Compliments
“
Thank you for guiding and mentoring our interns. With your coaching, they have accomplished great things. I am genuinely grateful for all your wisdom and advice that you have shared with all our team members, including our interns.
“
I am beyond grateful for your dedication to this project to make it right. I would be happy to help if you ever need a letter of recommendation, as I'm sure any employer would be pleased to know what kind of a person he's considering.
“
Yujing, I am so incredibly proud of you! Your hard work and determination to succeed inspire everyone around you! I am genuinely excited and eager to see the amazing things you will accomplish in the future. Keep being awesome!
“
I want to express my heartfelt gratitude to you for generously offering your time and expertise to support our student, as it will undoubtedly have a significant impact on the professional development of our CS and IT students.
“
Your work demonstrates a wonderful example of interdisciplinary work that we always aspire for. This speaks volumes about the calibre of our faculty and students. We won't miss an opportunity to brag about this achievement.