# Oussama Allamou (0xMowgli) > Oussama Allamou, known online as 0xMowgli, is a senior founding engineer who writes the code himself. He takes crypto products from an empty repo to production: smart contracts, backend, infrastructure and DevOps, frontend, mobile, and go-to-market. He has shipped to production since 2022 and has worked independently since May 2024, building low-latency trading systems and automation for dozens of clients. ## About - [About Oussama Allamou](https://0xmowgli.com/about): Facts, experience timeline since 2022, stack, what he builds and what stays private. - [Home](https://0xmowgli.com/): Selected work, private work described in general terms, scope from contracts to launch. Key facts: senior founding engineer, crypto-first, works on Solana and EVM networks. Backend & Smart Contract Engineer at DevSpaceHub (Jan 2022 to Jan 2023) and at Kayros (Feb 2023 to Apr 2024). Independent since May 2024. Open to founding-engineer roles and select contracts. ## Services - [All services](https://0xmowgli.com/services): Index of what he can be hired for. - [Solana trading bot developer](https://0xmowgli.com/services/solana-trading-bot-developer): Solana sniper bots, copy-trade engines and execution backends by Oussama Allamou (0xMowgli). gRPC streams from dedicated nodes, Redis, Jito fee strategy, from first commit to production. - [Telegram trading bot development](https://0xmowgli.com/services/telegram-trading-bot-development): Multi-chain Telegram trading bot development by Oussama Allamou (0xMowgli), backend lead on ZapX. Wallets, swaps, bridging and sniping on Solana and EVM networks. - [Solana gRPC and RPC infrastructure](https://0xmowgli.com/services/solana-grpc-rpc-infrastructure): Dedicated Solana nodes, Geyser gRPC and shred streams on bare metal, set up and operated by Oussama Allamou (0xMowgli). Multi-region with latency-based switching and full monitoring. - [Founding engineer for a crypto startup](https://0xmowgli.com/services/founding-engineer-crypto-startup): Oussama Allamou (0xMowgli) is a senior founding engineer who codes. He takes a crypto product from an empty repo to production: contracts, backend, infrastructure, frontend, mobile and launch. - [Crypto DevOps engineer](https://0xmowgli.com/services/crypto-devops-engineer): Production infrastructure for crypto products by Oussama Allamou (0xMowgli): Docker, Linux, bare metal, multi-region PostgreSQL, dedicated chain nodes, Prometheus and Grafana. ## Selected work - [L'Beldi](https://www.lbeldi.ma/): Marketplace connecting Moroccan cooperatives directly with buyers. Founding engineer. Web dashboard, backend, mobile app, DevOps and marketing. - [PHINIX](https://www.phinix.fun/): Low-latency Solana trading engine. Solo build. Sniping, copy-trading and real-time PnL. Market data over gRPC from dedicated nodes, hot state in Redis, Jito fee strategies. - [ZapX](https://x.com/ZapX_Trading): Multi-chain Telegram trading bot for Chainge Finance. Backend lead. One bot across five networks. Swaps through KyberSwap and Jupiter, cross-chain bridging and sniping. - Kayros Wallet: Multi-network gaming wallet. Backend and contracts. A wallet across 20+ EVM networks that reached 9,000+ users in its first weeks, alongside an NFT marketplace and a fiat-crypto exchange. - Solana sniper engines (private): Private execution systems for clients. Details are shared only on a call. - Copy-trade engines (private): Private wallet-tracking and mirroring systems for clients. Details are shared only on a call. - gRPC and shred-stream provider (private): Solana gRPC and shred streams served from dedicated nodes. Details are shared only on a call. - High-volume backends (private): Backends handling millions of requests. Details are shared only on a call. ## Writing - [Blog](https://0xmowgli.com/blog): Engineering notes by Oussama Allamou. - [How a Solana transaction actually lands: leaders, shreds, gRPC and Jito](https://0xmowgli.com/blog/how-solana-transactions-land): A practitioner walkthrough of the path a Solana transaction takes from your bot to finality: RPC forwarding, the leader TPU, shreds over Turbine, Geyser gRPC, Jito bundles, and what really improves landing rate. - [Why you should never store private keys in .env files](https://0xmowgli.com/blog/never-use-env): A .env file keeps your private key in plain text where git, dependencies and backups can reach it. How to move it into Foundry's password-encrypted keystore with cast wallet import, with a steppable diagram of what changes. - [assert vs require in Solidity: which one to use, and what each failure means](https://0xmowgli.com/blog/assert-vs-require): require validates what callers send. assert states what your own code guarantees. A steppable diagram of one call passing through both, the error each one produces, and how gas behaves since Solidity 0.8.0. - [ERC-20 approval frontrunning: how a changed allowance gets spent twice](https://0xmowgli.com/blog/front-running): When you change an ERC-20 allowance with approve, a spender watching the mempool can spend the old allowance first and the new one after. A steppable walkthrough of the race, why approve allows it, and the fixes that close it. - [Slippage parameters in Solidity: what amountOutMin really protects](https://0xmowgli.com/blog/Slippage-parametres): Slippage is the gap between the price you were quoted and the price your swap executes at. How amountOutMin and deadline turn a tolerance into an on-chain check, with a steppable diagram and the mistakes that leave a swap unprotected. - [receive vs fallback in Solidity: which one runs, and when](https://0xmowgli.com/blog/receive-fallback): receive runs when a contract gets ether with empty calldata. fallback runs when the calldata matches no function, or when ether arrives and there is no receive. A steppable decision tree, the gas stipend, and the cases where neither runs. ## Contact - [Telegram](https://t.me/mowgli_9): Primary contact, @mowgli_9. - [Email](mailto:oussamaallamou@gmail.com): oussamaallamou@gmail.com - [X](https://x.com/0x_mowgli) - [GitHub](https://github.com/Mowgli9) - [LinkedIn](https://www.linkedin.com/in/oussama-allamou/)