With 2+ years of professional experience, I build reliable software for fintech products, Web3 protocols, and data-intensive backends. My primary stack is Rust and Node.js with TypeScript and NestJS, backed by Java and Spring Boot production experience.
Reliable by design
observable · recoverable · secure
01 / Profile
I am a mid-level software engineer with 2+ years of professional experience building the parts of products that cannot be hand-waved: money movement, permissions, recovery, data integrity, and the jobs that still need to work at 2 AM.
My primary direction is Rust and Node.js with TypeScript and NestJS, especially for fintech platforms, Web3 infrastructure, and smart-contract products. I also bring production Java and Spring Boot experience for enterprise systems where correctness and operational discipline matter.
At Dar Blockchain, I have worked across backend services, blockchain indexers, financial workflows, smart contracts, AI evaluation, and learning platforms—turning complex rules into software that is observable, recoverable, and clear enough for a team to operate confidently.
Reliability
Recovery paths are part of the architecture.
Depth
From database indexes to protocol mechanics.
Ownership
Clear decisions, tradeoffs, and delivery.
02 / Selected work
A curated mix of production systems, public experiments, private product work, and protocols. Filter by the kind of problem—not the buzzword.
Enterprise loyalty infrastructure
A production-grade loyalty backend for Enda Tamweel, coordinating campaign eligibility, monthly scoring, point ledgers, reward requests, staff access, mobile authentication, and Hedera settlement.
Designed for a client population of roughly 500,000 with recoverable batch execution and auditable state transitions.
Hackathons & autonomous evaluation
A full-lifecycle hackathon platform spanning teams, judging, prizes, subscriptions, real-time communication, and an asynchronous four-layer system for evaluating submitted GitHub repositories.
Architected a modular NestJS backend with BullMQ workers, Redis-backed analysis, OAuth 2.0 / PKCE identity, Stripe billing, and production observability.
Multi-tenant learning infrastructure
An enterprise learning and credentialing backend for organization workspaces, course progress, randomized assessments, verifiable PDF certificates, and configurable gamification.
Built around tenant isolation, immutable exam and credential snapshots, Redis and BullMQ workers, cookie-based sessions, TOTP 2FA, and auditable state changes.
AMM protocol & real-time indexing
A full-stack decentralized exchange on Massa, combining independently audited AMM smart contracts with a Rust backend that turns live blockchain events into routing and market analytics.
Engineered pool, factory, and flash-loan mechanics alongside Redis Streams ingestion, TimescaleDB OHLCV rollups, exact U256 swap routing, and the open-source rust-massa-web3 SDK.
AI automated liquidity management on Hedera
An autonomous liquidity and yield optimization protocol built for Hedera, coordinating SaucerSwap V3 concentrated-liquidity vaults and Bonzo lending strategies with Gemini agents via MCP.
Engineered Solidity vault contracts, a multi-vault Tokio/Actix rebalancing engine, and a dedicated Rust Model Context Protocol server for agentic DeFi operations.
Private DeFi fund infrastructure
Private product work on decentralized fund infrastructure, spanning secure multi-asset flows, on-chain transaction verification, high-water-mark settlement, and subscription-based access.
Applied defense-in-depth withdrawal controls and scheduled financial workflows while keeping client and implementation details confidential.
Cross-chain token escrow & vesting
A multi-chain token escrow platform for market-cap-triggered releases and linear vesting, implemented across EVM networks and Massa with automated off-chain keepers.
Combined upgradeable Solidity contracts, WASM contract engineering, and Node.js workers that monitor market conditions and execute eligible releases.
Local-first intelligence agent
A single-binary crypto, DeFi, and AI intelligence agent in Rust with background multi-source ingestion, local BGE vector embeddings, SQLite storage, and an LLM tool-use loop.
Engineered offline semantic search via sqlite-vec, a keyboard-driven Ratatui terminal UI, an Actix Web REST/SSE server, and Telegram notifications with zero idle overhead.
Architecture discovery in Rust
A multi-agent CLI tool in Rust that clones and indexes repository syntax trees, Git history, and project metrics, generating deep architectural reports using Gemini.
Combines git2 commit forensics, framework detection, code complexity metrics, and the Rig AI agent framework to produce structured JSON/YAML intelligence.
Private ZK payroll streaming on Stellar
A zero-knowledge payroll streaming protocol on Stellar Soroban where salaries vest per second with identities, rates, and totals concealed behind Groth16 zk-SNARKs.
Verified on public testnet via Protocol 25 BN254 host functions, featuring in-browser WASM proving, Poseidon commitments, and front-running resistant nullifiers.
Private continuous payroll on Canton
A privacy-first continuous payroll dApp on Canton Network where salary accrues per second with native on-chain tax withholding and Canton sub-transaction privacy.
Engineered a single Daml PayrollStream template with lazy per-second accrual math and a custom TypeScript client for Canton JSON Ledger API v2.
FHE payroll for Web3 teams
An institutional payroll protocol using Fully Homomorphic Encryption (FHE) on Fhenix so salary amounts, deductions, and balances remain encrypted while executing on-chain.
Solves the institutional privacy gap with CoFHE contracts, encrypted euint32 arithmetic, edge encryption, and gasless cryptographic viewing permits.
Trading engine internals
A high-performance spot matching engine in Rust with limit and market orders, partial fills, price-time priority, precise decimal handling, and a Tokio message-passing interface.
Achieves sub-10 microsecond execution latency and 100K orders/sec on a single thread using Tokio MPSC channels, BTreeMap price levels, and VecDeque queues.
Agentic smart-contract security
An autonomous AI security CLI in Rust that analyzes Hardhat and Foundry codebases, reasons across multi-contract interactions, and synthesizes reproducible Foundry exploit tests.
Bridges static analysis and manual audits by verifying potential vulnerabilities with executable proof-of-concept tests, eliminating false positives.
Neural economy state channel protocol
A real-time micropayment protocol and infrastructure SDK for autonomous AI agents, streaming gasless per-token payments for live LLM inference using Yellow Network state channels on Polygon.
Engineered an Actix Web and SQLx gateway coordinating state-channel signatures, Ollama LLM streaming, and Polygon Amoy custody.
03 / Technical toolkit
My primary direction is backend and systems work with Rust, Node.js, TypeScript, and NestJS. Java and Spring Boot remain proven production tools in a broader toolkit built around reliable state.
The stack I am targeting for backend and systems engineering roles.
Reliable state for money movement, accounting, analytics, and recovery.
Protocols, custody, indexing, and settlement with explicit trust boundaries.
Production Java experience that complements my primary Rust and TypeScript focus.
The engineering practices and tooling that make systems safe to ship and operate.
04 / Experience
Mid-level ownership across production backends and Web3 systems: from domain modeling and APIs to contracts, data pipelines, security, and recovery.
June 2024 — Present
Tunisia
More than two years delivering production software across fintech, Web3, and platform products. I work from domain rules and trust boundaries through API, database, worker, and smart-contract implementation, with an emphasis on systems that teams can audit, operate, and recover safely.
05 / Start a conversation
Open to mid-level software engineering roles focused on Rust, Node.js, TypeScript, NestJS, fintech systems, and Web3 smart contracts. I also consider selective backend and protocol contracts where there is a challenging system to design, harden, or ship.
ayouub.ameur@gmail.com