Jordan Assayah

Rising Codementor

US$15.00

For every 15 mins

ABOUT ME

Senior Software Engineer | AI Agents/RAG | Blockchain| Python & Nodejs

Senior Software Engineer (10 years experience, ex-Fireblocks)

With extensive blockchain expertise and distributed systems experience, I design sophisticated backend systems and AI platforms running in production—in environments where errors are costly: finance, crypto, legal, sensitive data.

I help companies:

Reduce infrastructure costs: Cloud audit and optimization (50K$/year saved on AWS for one client), optimized processing pipelines (ingestion cost reduced 7x on latest project)
Build reliable distributed systems: Microservices, real-time high-throughput APIs, event-driven architecture (recent example: price aggregator connected to 10+ providers, latency cut in half)
Accelerate their teams: Architecture, boilerplates, and CI/CD reducing time-to-production (new service onboarding dropped from 2-3 days to 4 hours)
Leverage documents and data with AI: RAG assistants with verifiable citations, OCR and transcription at scale, POC-to-production transitions
Secure and harden existing systems: Server hardening, testing, race condition fixes on critical systems

Recent references: Legal AI platform delivered solo end-to-end (65,000+ documents, cited responses in under 40 seconds); Fireblocks DeFi browser extension (lead developer, 2,000+ users, 5.0 on Chrome Web Store).

Native French speaker, fluent English. 100% remote, European timezones.

Stack: Python, TypeScript/Node.js, NestJS, FastAPI, Blockchain (Solidity, Web3.js, ethers.js), Microservices, RabbitMQ, Kafka, WebSockets, PostgreSQL, Redis, AWS, Docker, Kubernetes, RAG, LLM, Anthropic API (Claude), Qdrant, OCR.

French, English

Jerusalem (+03:00)

Joined November 2021

EXPERTISE

6 years experience

6 years experience

10 years experience

6 years experience

6 years experience

5 years experience

6 years experience

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SOCIAL PRESENCE

GitHub

MVM

MVM (Make Visual Music)

JavaScript

shoe-order

A website to customize your shoes

JavaScript

EMPLOYMENTS

Senior Software Engineer

Codakavod

2025-10-01-Present

- Designed and shipped, end-to-end, a production RAG platform for a confidential litigation client: 65,000+ legal files (1.3 TB) in Hebre...

- Designed and shipped, end-to-end, a production RAG platform for a confidential litigation client: 65,000+ legal files (1.3 TB) in Hebrew, French, and English. - Built the GPU ingestion pipeline: parallel OCR (Surya 2) of 11,000+ scanned PDFs on RTX 4090 workers, processing the full corpus in about 4 hours for $60 (vs. an estimated 2 days and $400 serverless). - Implemented hybrid retrieval on Qdrant (dense + BM25 + cross-encoder reranking) and an agentic legal-drafting module with human-in-the-loop citation verification (Anthropic tool use), answering in under 40 seconds. - Engineered a highly parallelized scraper extracting 3,000+ product specifications across 300+ structurally diverse websites, while being resilient to advanced anti-bot protections. - Re-secured a hacked client production server: SSH key-only access, fail2ban (4,400+ IPs banned, 32,000+ intrusion attempts), Lynis hardening audit, Cloudflare WAF. - Architected a custom design system for a complete VoIP platform redesign, building a reusable library of 60+ React components with built-in Progressive Web App (PWA) scaffolding and adherence to modern web standards. - Designed and delivered a dynamic PC configuration platform, improving accessibility for inexperienced users through an automated, questionnaire-driven workflow to instantly generate high-end builds. - Built and shipped a Full-Stack platform for Swiss public-procurement intelligence, letting users search legal texts, auto-generate complex reports, and track active tenders in real time.

Python

Node.js

OCR

Python

Node.js

OCR

API Integration

NestJS

Fastapi

Qdrant

RAG

Senior Full-Stack Developer

Fireblocks

2024-01-01-2025-07-01

- Forked and rewrote the open-source Rabby wallet into the Fireblocks DeFi extension (principal developer, 8+ releases): dApp security sc...

- Forked and rewrote the open-source Rabby wallet into the Fireblocks DeFi extension (principal developer, 8+ releases): dApp security scanning, policy enforcement, desktop linking; 2,000+ users and a 5.0 rating on the Chrome Web Store. - Replaced a support-ticket workflow with two-click self-serve configuration of non-EVM dApp connections, working across the React console, Node.js microservices, a C++ config manager on SGX, and Firebase. - Shipped native Solana transaction decoding end-to-end (new microservice plus the public client API), turning “unknown” payloads into verified, readable data for API clients and 10 dynamic mobile templates. - Hardened the core WalletConnect service (connection guards, permission gating), raised test coverage by 11 points in three weeks, and fixed a race condition duplicating transactions, a double-approval risk.

Node.js

MySQL

WebSocket

Node.js

MySQL

WebSocket

Redis

Docker

Kubernetes

Microservices

Cryptocurrency

NestJS

AWS

Senior Back-End Developer

Coinmama

2023-02-01-2023-05-01

- As one of two backend engineers, initiated the migration of a 7-year PHP monolith to Kubernetes-based Node.js microservices: first serv...

- As one of two backend engineers, initiated the migration of a 7-year PHP monolith to Kubernetes-based Node.js microservices: first services in a NestJS monorepo and a zero-data-loss TypeORM migration pipeline with atomic rollbacks.

PHP

Node.js

MySQL

PHP

Node.js

MySQL

Docker

Apache Kafka

Kubernetes

Microservices

TypeORM

NestJS

AWS