Eliron Picard

About

Computer Science student experienced in building end-to-end software systems — from concurrent C servers and OS-level programming to full-stack web applications and machine learning models. Enjoy working in Linux environments, solving algorithmic problems with practical implementations, and picking up new technologies quickly.

Technical Skills

Languages

C, C++, Python, JavaScript, Java, Go

Backend

Node.js, Express.js, REST APIs, Authentication, MongoDB, SQL

Systems

POSIX threads, Multithreading, TCP/IP sockets, Unix signals, Process management, Concurrency

Machine Learning

NumPy, PyTorch, Neural networks, CNNs, K-Means, PCA

Infrastructure

Linux, Docker, Git / GitHub, Postman

Concepts

Graph algorithms, A* pathfinding, CPU scheduling, Recommendation systems, Distributed systems fundamentals

Spoken

Hebrew (native) · English (fluent) · German (fluent)

Projects

Waze — GPS Navigation Engine

Systems · C

2025

GitHub

Built a 3-tier concurrent TCP server in C: accept thread → per-connection client threads → lock-free A* routing workers (C11 _Atomic reads, zero contention) + EMA traffic workers (64-stripe mutexes) over the real Tel Aviv OSM road network (~6,500 nodes, ~13,000 edges).
Implemented A* pathfinding with a flat binary min-heap and per-worker pre-allocated RouteContext scratch space (generation counter for O(1) resets, no per-call allocation); added hierarchical section routing — a precomputed 5×5 hub-to-hub grid stitched with concurrent per-car segment routing for fast batch requests.
Modeled congestion physics for up to 30,000 simulated vehicles with per-class speed degradation; benchmarked 11.27× throughput scaling to 16 workers (362.5 → 4,087 ops/s, p50 13.3 ms) on a 16-core machine.
Built a full-stack web UI with a Python HTTP↔TCP bridge and Leaflet.js live map showing car positions and congestion overlays; deployed the entire stack via Docker Compose.

C Python C11 Atomics Lock-Free TCP/IP A* routing Hierarchical Routing OpenStreetMap Leaflet.js Docker

PlayFlicks

Full-Stack · MERN

2025

GitHub

Full-stack movie platform (MERN) with authentication, role-based access control, and optimized MongoDB queries for movie retrieval.
Recommendation engine written in C using user–movie similarity scoring from shared viewing history, with movies ranked by aggregated similarity weights.

Node.js Express React MongoDB C REST API Auth

AI Voice Agent

AI · Backend

2025

GitHub

Multilingual AI voice assistant automating appointment booking, rescheduling, and cancellation via natural-language phone calls, with auto-detected language support for Hebrew, English, and French.
Integrated Deepgram Nova-2 for speech-to-text and Claude Sonnet for LLM-based conversation handling; Asterisk telephony infrastructure for automated call routing.
Backend services in Node.js, Express, and SQLite for scheduling workflows, with Google Calendar API integration for real-time slot availability and booking.

Node.js Express Deepgram Claude Asterisk Google Calendar API SQLite Docker

Orchestra — Multi-Agent Automation Platform

AI · Backend

2025

GitHub

Python multi-agent orchestrator that auto-discovers agents at startup and maps each to a CLI subcommand with zero manual registration.
Referral Finder agent: concurrently searches LinkedIn via Tavily, resolves candidate emails through a 4-tier pipeline (GitHub API → domain pattern cache → Hunter.io → SMTP RCPT TO), and generates personalized outreach with Claude Haiku.
Job Finder agent: searches job listings via web APIs, tailors CV content per role using the Claude API, and writes a formatted .docx file; secrets auto-injected into typed agent configs via naming convention.

Python Claude API Tavily Hunter.io SMTP ThreadPoolExecutor Docker

Mimi — AI Language Practice Coach

AI · Backend

2025

Real-time AI phone language coach routing Twilio calls directly into the OpenAI Realtime API over WebSocket — mulaw 8kHz audio forwarded raw in both directions with zero transcoding for sub-200ms conversation.
Multi-agent post-turn pipeline: Claude Haiku runs an async quality observer and safety-violation detector after each turn, while gpt-4o-mini generates post-call progress notes injected into the next session.
Persistent per-caller memory via Drizzle ORM + Neon PostgreSQL, letting returning callers skip onboarding; skill-file architecture defines all coaching behavior as versioned markdown loaded at runtime.
Multilingual onboarding across Hebrew, English, and German with server-side VAD language detection from the first turn.

Node.js OpenAI Realtime API Twilio WebSockets Claude Drizzle ORM Neon PostgreSQL

CNN Image Classifier — FashionMNIST

Deep Learning

2025

GitHub

Designed and trained a 3-block CNN (Conv2d → BatchNorm → ReLU → MaxPool → Dropout) in PyTorch, achieving 80%+ validation accuracy on FashionMNIST.
Benchmarked against a fully-connected MLP baseline; tuned architecture depth, filter counts, dropout rate, and learning rate to optimize convergence.

Python PyTorch CNN BatchNorm FashionMNIST Deep Learning

Neural Network from Scratch

2025

GitHub

MLP implemented in pure NumPy — forward propagation, backpropagation, and gradient descent without any ML framework.
Full training pipeline: data loading, training loop, and evaluation on handwritten digit classification.

Python NumPy MLP Backpropagation

K-Means & PCA from Scratch

2025

GitHub

K-Means with convergence detection + PCA via eigen-decomposition in NumPy, applied to 2D synthetic datasets and MNIST (784 → 2 dims).
Demonstrated MNIST reconstruction at 3, 10, and 100 principal components to illustrate the quality–compression trade-off.

Python NumPy K-Means PCA MNIST Unsupervised Learning

CPU Scheduler Simulator

Systems · OS

2024

GitHub

FCFS, SJF, Priority, and Round Robin scheduling algorithms in C; Unix signals used to model scheduling events and preemption.
Structured logging to validate scheduler correctness across multiple workloads and time-slice scenarios.

C Unix Signals FCFS Round Robin OS

Linux Backup Tool

Systems · POSIX

2024

GitHub

Recursive directory backup in C using POSIX file system APIs, preserving permissions, metadata, symbolic links, and hard links to avoid duplicate copying.

C POSIX Linux File Systems Symlinks

WhatsBlast

Automation

2025

GitHub

WhatsApp automation workflows using n8n and the Evolution API for bulk message scheduling and delivery pipelines.

n8n Evolution API WhatsApp Workflow Automation

Arkanoid Game

OOP · Java

2024

GitHub

Arkanoid-style 2D game in Java with modular OOP architecture — game loop, event/input handling, collision detection, and extensible level system.

Java OOP Game Loop Design Patterns

Education

B.Sc. in Computer Science — Bar-Ilan University

Jan 2024 – Present · Expected Aug 2027

Algorithms Advanced Algorithms Operating Systems Parallel & Distributed Systems Databases Machine Learning

Military Experience

Air Force Intelligence · Israeli Air Force · 2021–2023

Operated in mission-critical environments requiring reliability and precision under strict deadlines.
Worked on sensitive operational projects in a team-oriented role requiring strong communication and adaptability.
Continued reserve service for 2+ years with ongoing operational involvement.