0e19326bcb
Updated all resumes that list open source projects to consolidate testct and ctclient into a single bullet point since both are Certificate Transparency related tools with similar purposes (testing, validation, monitoring). Updated resumes: - paul-halvorsen-resume-detailed.md (main detailed resume) - stealth-startup/backend-developer/paul-halvorsen-resume.md - collette/software-engineer-ii/paul-halvorsen-resume.md - lemans/backend-software-engineer/paul-halvorsen-resume.md - tenstorrent/devrel-engineer/paul-halvorsen-resume.md Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
88 lines
4.7 KiB
Markdown
88 lines
4.7 KiB
Markdown
---
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name: Paul Halvorsen
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keywords: backend engineer, java, go, rest api, sql, microservices, api design, secure systems
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left-column:
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- "Email: paul.halvorsen@pm.me"
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- "Phone: +1-410-236-4665"
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right-column:
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- "GitHub: github.com/malwhile"
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- "LinkedIn: linkedin.com/in/paul-halvorsen"
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- "Blog: flow.halvo.me"
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fontsize: 10pt
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fontenc: T1
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urlcolor: blue
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linkcolor: magenta
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numbersections: false
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---
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## Professional Summary
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Backend Software Engineer with 15+ years of experience designing and implementing secure, scalable REST APIs and backend systems. Expert in Java, Go, and SQL with proven track record of building high-performance services, optimizing database queries (50%+ improvements), and architecting microservices supporting hundreds of thousands of users. Passionate about clean code, rigorous testing, and solving complex backend challenges.
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## Core Technical Skills
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**Languages:** Java (Advanced), Go (Advanced), Python, Rust, C | **Backend:** REST APIs, microservices architecture, service-oriented design | **Databases:** MySQL, SQLite, SQL (query optimization, indexing, schema design) | **DevOps:** Docker, GitLab CI/CD, automated testing | **Practices:** Test-driven development, code reviews, agile development, secure coding
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## Professional Experience
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### Software Engineer | Abnormal AI
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\resumedate{**January 2026 – Present**}
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- Design and develop Python-based backend microservices for multi-region distributed systems with auto-scaling capabilities
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- Build and maintain Docker containerized services and Kubernetes orchestration across 10+ clusters
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- Develop REST APIs and data aggregation services handling millions of data points at scale
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- Implement performance optimizations achieving up to 70% efficiency gains
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- Write comprehensive unit and integration tests; maintain high test coverage
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### Sr Software Engineer | Binary Defense
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\resumedate{**April 2022 – October 2025**}
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- Architected and implemented backend libraries in Python and Rust for cross-platform services
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- Designed and built REST APIs for secure communication between distributed client-server systems
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- Optimized backend services achieving 60-80% improvements in memory and network efficiency
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- Implemented encrypted database layers (SQLite) with secure key storage
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- Built comprehensive end-to-end testing frameworks and automated test suites
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- Developed scalable services using event-driven architecture handling millions of events
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- Maintained GitLab CI/CD pipelines for compilation, testing, and deployment
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### Security Software Engineer | Parsons
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\resumedate{**April 2018 – November 2020**}
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- Designed and built backend file storage service supporting concurrent multi-user access with role-based access control
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- Implemented REST APIs for file management with web and CLI interfaces
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- Managed relational databases (MySQL) with advanced indexing and query optimization strategies
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- Developed data deduplication logic and custom serialization protocols for network optimization
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- Implemented LDAP integration for enterprise authentication systems
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### Security Software Engineer | NSA
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\resumedate{**November 2011 – April 2018**}
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- Designed and maintained relational databases (MySQL) holding thousands of records with complex queries
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- Built REST JSON APIs for real-time data transfer between web interfaces and backend services
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- Implemented query optimization and indexing strategies reducing query latency by 50%+
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- Developed backend web applications using Java, Python, and PHP on application servers (Tomcat, Apache, Nginx)
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- Designed and deployed secure communication protocols and custom serialization formats
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- Built backend systems serving thousands of concurrent users across distributed infrastructure
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- Implemented security hardening including encrypted storage, secure key exchange, and certificate validation
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### Systems Engineer | NSA
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\resumedate{**September 2009 – November 2011**}
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- Managed infrastructure supporting 130+ RHEL servers across 10+ systems with multiple services
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- Developed Python automation scripts for system monitoring, health checks, and remediation
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- Built reporting systems integrating with REST APIs for real-time alerting and status tracking
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## Education
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**Master of Science in Computer Science** | University of Maryland Baltimore Campus (2013)
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- Thesis: "Stateless Detection of Malicious Traffic: Emphasis on User Privacy"
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**Bachelor of Science in Computer Science** | Salisbury University (2009)
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- Graduated Magna Cum Laude
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## Open Source & Projects
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- **sjles-pta-vote** (Go, TypeScript) - Full-stack community voting platform with Go backend and REST APIs
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- **testct** & **ctclient** (Rust) - Certificate transparency testing, validation, and monitoring tools
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- **baseball-nn** (Python) - Machine learning project with data pipeline development
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