Elfege Arthur Leylavergne

Solution Architect | Senior Software Engineer | Ph.D. Logic & Epistemology

Profile

I architect systems that anticipate and resolve complexity. With 15 years studying logic and epistemology, I approach distributed systems as evolving structures with internal tensions — not static designs. Combined with hands-on engineering since 2000, I design solutions that anticipate failure modes, reduce complex problems to their essential structure, and integrate contradictory data sources into unified outputs.

Core Competencies

Languages:Python, JavaScript/ES6, TypeScript, C++, Groovy, Bash, SQL
Back-End:Flask, FastAPI, Gunicorn, Node.js/Express, PostgreSQL, PostgREST, Flyway, RESTful API design, database schema design
Front-End:React 19, Next.js 15, TypeScript, MUI, Tailwind CSS, Kendo UI, Leaflet/GeoServer, ECharts, Socket.io
Data & Streaming:Apache Flink, Apache Kafka, PyFlink, AVRO serialization, real-time stream processing
DevOps & Cloud:Docker (Compose, Swarm), CI/CD, GitHub Actions, AWS (ECR, EC2, S3, Secrets Manager, SSO), Linux admin, systemd
Async & Concurrency:Python asyncio, aiohttp, APScheduler, multiprocessing, multithreading, event-driven architecture
Networking:TCP/IP, SNMP, NTCIP, RTSP, MQTT, WebRTC, WHEP/WHIP, HLS, ONVIF, STUN/TURN, SSH, TLS
Security:NIST (SP 800-160/800-37), AES-256-CBC, Fernet/OpenSSL, JWT/CSRF, Docker network isolation
Hardware:LiDAR/TEMS sensors, Bosch RCP+, ONVIF, SNMP relay controllers, FFmpeg, ESP32/ESP8266

Experience

Senior Software Engineer — Mindhop Inc., White Plains, NY | 2023 – Present

Over Height Vehicle Detection — Real-Time Edge Safety System (NYSDOT)

  • Sole architect of production edge-computing system: fault-isolated multi-process architecture in Docker with 7-layer watchdog, 120+ days continuous uptime, ~100MB footprint.
  • Dual-sensor correlation (LiDAR TCP + VCA RTSP) with 5-second deduplication; VCA optimization reducing 18 duplicate detections to 1 via confidence plateau detection.
  • MQTT/WebSocket distribution for TMC dashboards; AVRO pipeline to Apache NiFi; automated field installer with encryption and hardware integration.

DMS Control API — Highway Dynamic Message Sign Command & Control

  • Sole architect: reverse-engineered NTCIP 1203 from MIB specs to build vendor-agnostic driver framework (Daktronics VFC-3000, generic NTCIP) with factory/registry pattern and 3-tier quirk resolution.
  • Full protocol lifecycle: MULTI validation, CRC computation, activation sequences, readback verification. 15+ REST endpoints, 31 E2E tests, Kafka streaming.

Device Status Monitoring — Network Infrastructure at Scale (UDOT)

  • Architected async monitoring for 2,400 devices / 750+ subnets: 90%+ cycle time reduction (54 min → 5 min) via asyncio/aiohttp with 2,000 concurrent workers.
  • APScheduler per-group scheduling (12/24/48 min), PostgREST streaming writes, Docker + AWS (ECR, Secrets Manager). 120+ hours zero-error operation.

Alert Routing & Video Streaming — Event Processing & Low-Latency Camera Infrastructure

  • Real-time alert system (Flink/Kafka) dispatching email, SMS, WebSocket notifications. Video platform: Flask + FFmpeg + WebRTC/HLS delivery with React monitoring UI.

Front-End — DotStream React/Next.js Monorepo

  • Contributor to production Next.js 15 / React 19 / TypeScript monorepo (Turbo, pnpm). Integrated OHVD real-time subsystem: alert providers, WebSocket streams, map panels, Kendo grids.

Software Engineer — PowerYou AI, New York, NY | 2022

Professor, Researcher & Technology Integrator — Lycée Français of New York | 2007 – 2022

Open-Source Developer — Personal Projects | 2012 – Present

IT Administrator — Teleperformance, Strasbourg, France | 1999 – 2001

Education

Springboard Software Engineering Curriculum (800+ hours), Calif. BPPE — 2023
Ph.D., Université de Nantes — Logic & Epistemology | Summa Cum Laude | Published (ISBN 978-989-20-3141-5)
Master's, Université de Grenoble Alpes | ENS Lyon — Logic, Epistemology & Philosophy | Magna Cum Laude