
John T
@johnt1
Software engineer at CB Systems LLC and builder of VulnXplorer, a vulnerability-intelligence SaaS with paying users and database-enforced tenant isolation.
What I'm looking for
At CB Systems LLC, I drove an agent-assisted migration of a Java Spring Boot microservice from Java 17/Spring Boot 3 to Java 21/Spring Boot 4, reviewing every generated change by hand and resolving breaking changes to pass internal security testing.
I built VulnXplorer from concept to production SaaS with paying users, including a vulnerability-triage pipeline and graph-based security analysis engines. I secured its multi-tenant architecture with database-layer isolation verified by a regression suite, and built production RAG and summarization systems at MurmurCast. At the National Security Agency, I built Python and Spark anomaly-detection pipelines for classified, air-gapped workloads and won first place in the 2023 Bug Bowl.
Experience
Work history, roles, and key accomplishments
Founder & Software Engineer
CB Systems LLC
Aug 2026 - Present (2 months)
Providing software development services for the US Customs & Border Protection Cargo Division (CSPD). Drove an agent-assisted migration of a Java Spring Boot microservice from Java 17/Spring Boot 3 to Java 21/Spring Boot 4, resolving all breaking changes and authoring test cases for a defect caught in SAT.
Founder & Product Engineer
MurmurCast
Feb 2026 - Present (8 months)
Architected a production RAG pipeline with OpenAI embeddings, pgvector HNSW, and hybrid search, achieving sub-500ms latency. Engineered per-layer graceful degradation and hardened deploys with CI/CD security checks.
Founder & Product Engineer
VulnXplorer
Feb 2026 - Present (8 months)
Designed and built a 100K+ line full-stack SaaS for vulnerability intelligence with paying users. Developed 6 graph-based security analysis engines and secured the platform end to end with tenant isolation, JWT revocation, and OWASP Top 10 hardening.
Software Engineer
National Security Agency
Apr 2023 - Jun 2025 (2 years 2 months)
Built Python/Spark pipelines for terabyte-scale anomaly detection on air-gapped systems. Won first place in the 2023 Bug Bowl and mentored junior engineers.
Gathered requirements and modified SQL scripts for FBI name checks. Presented program activities at a Deloitte all-hands meeting. Also worked on DHS I&A and Data Cube projects, implementing bulk search and automating cluster deployments.
Web Developer
Blue Canopy
Sep 2016 - Jul 2017 (10 months)
Integrated Bootstrap, Django, and MongoDB with CRITs and Request Tracker. Contributed to SOC discussions on Blue Coat, STIG, and Splunk.
Designed and developed an AngularJS CAPCO classification builder and RESTful web services in Spring/Java. Implemented web scraping in Java for a customer solution.
Education
Degrees, certifications, and relevant coursework
Northern Virginia Community College
A.A.S. Automotive Technology, Automotive Technology
2026 -
A.A.S. in Automotive Technology from Northern Virginia Community College, expected to complete in May 2029.
New York University
M.S. Cybersecurity, Cybersecurity
2020 - 2022
Grade: 3.7/4.0
M.S. in Cybersecurity from New York University, with a cumulative GPA of 3.7/4.0.
Syracuse University
M.S. Cybersecurity, Cybersecurity
2019 - 2020
Grade: 3.917/4.0
M.S. in Cybersecurity from Syracuse University, with a cumulative GPA of 3.917/4.0.
University of Virginia
B.A. Computer Science, Computer Science
2010 - 2014
B.A. in Computer Science from the University of Virginia.
Tech stack
Software and tools used professionally
Splunk
Apache Spark
Amazon S3
GitLab
Jenkins
GitHub Actions
Jupyter
NumPy
Pandas
PySpark
PostgreSQL
MongoDB
SQLite
Node.js
Django
Spring
Bootstrap
Redis
Jira
React
AngularJS
JavaScript
Python
Java
C#
C++
C
TensorFlow
PyTorch
scikit-learn
Keras
Celery
FastAPI
Wireshark
SQLAlchemy
Kali Linux
Heroku
Gemini
Elasticsearch
Ansible
TypeScript
Git
Docker
Request Tracker
SQL
ServiceNow
Burp Suite
sqlmap
Nmap
Metasploit
Ollama
Anthropic Claude API
CodeQL
Bash
Gitleaks
pgvector
Data.world
Claude Code
Jan
ChatGPT
AWS
Availability
Location
Authorized to work in
Website
johnathanftai.comSalary expectations
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