cv
Basics
Sean Brar
ML Systems Engineer
Los Angeles, California, US
| [email protected] | |
| Url | https://seanbrar.com |
| Summary | Google DeepMind GSoC '25 alumnus. ML systems engineer building evaluation and verification infrastructure for AI systems. Post-bacc CS & Mathematics. |
Projects
- 2025.06 - Present
Pollux
- Deterministic content-hash caching cutting API costs 90% on fan-out workloads
- Single-flight async deduplication eliminating duplicate uploads across concurrent requests
- Error hierarchy separating retry policy for generation vs. side-effect calls
- Layered validation: mutation testing, property-based testing, contract/integration/golden tests
- Published to PyPI; 113+ merged PRs across Python 3.10–3.14 CI matrix
- 2024 - Present
ContextRAG
- 7 retrieval metrics with TOST equivalence testing and Holm-Bonferroni correction
- Confirmed preregistered null hypothesis (adaptive ≈ uniform within 0.02 nDCG margin)
- Reproducibility manifests tracking git SHA, dependency versions, and dataset fingerprints
- 60+ experiment runs across 3 datasets at 91% test coverage
- 2026.02 - 2026.02
gh-templates
- Pydantic contracts validating structured Gemini output at 99.97% success rate
- Transient/permanent error taxonomy with resumable 40-worker async pipeline
- Phi coefficient and point-biserial correlation with Benjamini-Hochberg FDR correction
- 2024.12 - Present
Cartridge
- ONC RPC framing and XDR binary serialization in C# across 119 source files
- 8-script verification harness: warning-fingerprint regression gating, stub-completeness scanning
- Concurrent NFS client with semaphore-guarded state machine and TTL-expiring caches
- 2024.09 - Present
paperweight
- RSS-first fetch routing with batched arXiv API fallback and Tenacity retry at 3 external boundaries
- Golden-set scoring validation and SQLite-backed offline integration testing
- Published to PyPI with 1:1 test-to-source ratio across 15 test files
- 2026.02 - Present
nullscope
- 33 ns/call disabled overhead (matching bare function call cost) verified via GC-disabled benchmarking
- contextvars-based async-safe scope hierarchy with token-reset semantics
- Published to PyPI with OIDC trusted publishing and 5-version CI matrix
- 2025.01 - 2025.02
Traffic Object Detection Model
- Benchmarked 8 architectures (YOLO, SSD, Faster R-CNN)
- 76% mAP on custom traffic dataset
Skills
| ML/AI | |
| LLM APIs (Gemini, OpenAI) | |
| RAG Systems | |
| Evaluation Harness Design | |
| Async Pipelines |
| Verification & Testing | |
| Mutation Testing | |
| Property-Based Testing | |
| Equivalence Testing | |
| Reproducibility Infrastructure |
| Programming | |
| Python | |
| C/C++ | |
| C# | |
| Bash/Shell |
| Systems & Tools | |
| Linux | |
| Docker | |
| AWS | |
| CI/CD (GitHub Actions) | |
| mypy (strict) |
Work
-
2023.08 - 2025.01 Support and Systems Engineer
ELEMENTS
Tier 2/3 Linux support for enterprise media environments.
- Tier 2/3 Linux troubleshooting for enterprise media clients
- Custom Python API integrations for client services
- Cross-timezone international collaboration
-
2023.02 - 2024.12 Founder & Systems Engineer
Latido203 Creative LLC
Founded technical consultancy serving creative agencies.
- Led six-figure, 5-person app development initiative
- Administered AWS infrastructure (EC2, Route53, SES)
- Continued as technical consultant through 2024
-
2022.07 - 2023.01 IT Coordinator
Brisa Del Mar Strategies
Technical infrastructure and data analysis for political campaign.
- GPT-powered meeting minutes system (2 hours → 5 minutes post-meeting)
- WireGuard VPN deployment on Raspberry Pi/Docker
- Full data recovery after critical drive failure
Education
-
2025 - Present Post-Baccalaureate Studies
Glendale Community College
Computer Science and Mathematics
- Data Structures, Discrete Mathematics, Computer Architecture, Calculus sequence
Courses: CS/IS 211, CS/IS 125, MATH 103EH, CS/IS 135 -
2021 - 2022 Bachelor of Arts
California State University, Los Angeles
Political Science and Government
- Summa Cum Laude, 3.9/4.0 GPA
- Computer Information Systems minor
- Best Undergraduate Paper Award
- National Pi Sigma Alpha writing nominee
Courses: CIS 4380, CIS 3050, CIS 3010, CIS 4840 -
2016 - 2021 Associate Degree for Transfer
Glendale Community College
Political Science and Government
- Academic Honors at graduation
- Unix/Linux systems coursework
Courses: CS/IS 172, CS/IS 193
Certificates
AI & Machine Learning
| AI/ML Certificate Program | ||
| Caltech | Feb 2025 | |
| AI Strategy | ||
| Cornell | Jun 2023 | |
| Machine Learning Foundations | ||
| Amazon Web Services | Apr 2022 | |
Systems & Infrastructure
| CompTIA Network+ | ||
| CompTIA | Jun 2024 | |
| CompTIA A+ | ||
| CompTIA | May 2024 | |
Organizations
Professional
| Association for Computing Machinery (ACM) | 2021-PRES |
Academic
| Pi Sigma Alpha | 2021-PRES |
Service
| National Eagle Scout Association | 2021-PRES |
Interests
| Research Interests | |
| ML Evaluation & Verification | |
| Reinforcement Learning | |
| Reproducibility Infrastructure |
| Current Projects | |
| LLM Output Validation | |
| Evaluation Harness Design | |
| Academic Paper Triage |
Awards
- 2022
Best Undergraduate Political Science Paper
California State University, Los Angeles
Faculty-selected outstanding research showcasing superior analytical thinking and methodology.
- 2013
Eagle Scout Rank
Boy Scouts of America
Highest rank achieved by only 4% of scouts, demonstrating exceptional leadership and project execution.
Volunteer
-
2012.04 - 2012.12 Eagle Scout Project Leader
Boy Scouts of America
Planned and executed community service project, demonstrating project management and leadership.
- Multi-level approved project plan
- Team-based implementation management
- On-spec community project delivery