Muhammad is available for hire
Hire MuhammadMuhammad Wasif
Verified Expert in Engineering
Software Engineer and Developer
Islamabad, Pakistan
Toptal member since October 5, 2026
Bio
Muhammad Wasif is a blockchain and back-end team lead with 5 years of experience building DeFi, prediction market, and cross-chain platforms. At Rain, he led 10+ engineers to scale an on-chain prediction market to $90M+ TVL, $60M+ trading volume, and 6,000 transactions per second, shipping market-making bots and an AI oracle that resolves market outcomes. He builds secure, high-throughput systems in TypeScript, JavaScript, Node.js, Solidity, Python, and FastAPI.
Portfolio
rain.one
Solidity, Node.js, Python, Alchemy, The Graph, Amazon S3 (AWS S3)...
Quecko
Solidity, Python, FastAPI, PostgreSQL, Redis, Foundry, Geth (go-ethereum)...
Orbit Cosmos
Solidity, Node.js, The Graph, Redis, Foundry, MongoDB, Docker...
Experience
- JavaScript - 6 years
- Node.js - 6 years
- MongoDB - 6 years
- Express.js - 6 years
- Solidity - 6 years
- TypeScript - 5 years
- PostgreSQL - 4 years
- Python - 2 years
Work Experience
Engineering Lead
2025 - PRESENT
rain.one
- Led a 10+ engineer team (back end, smart contracts, DevOps, front end) from architecture to production and owned the PR review process, ensuring code quality, security, and testing standards on every merge.
- Architected and deployed Rain (rain.one, rain.trade), an on-chain prediction market with a custom order book, hybrid execution engine, and real-time trade logic.
- Built Rain’s two-layer AI oracle: Olympus AI resolves markets from web-search evidence, and Lex AI settles disputes using submitted proofs.
- Wrote gas-optimized smart contracts on a diamond-proxy pattern for modular upgrades and future feature additions.
- Integrated Alchemy’s Account Abstraction stack (EIP-4337) for streamlined onboarding, gasless transactions, and programmable smart wallets.
- Designed a load-balanced, auto-scaling off-chain back end on AWS ECS handling up to 6,000 transactions/sec, reducing downtime incidents and cutting infrastructure costs by about 30%.
- Developed multi-process Python market-making bots with one independent process per market; scaled to 10–25 concurrent markets at 50–150 orders/sec.
- Built analytics stacks using Dune, The Graph, and custom cron processors for real-time liquidity, open interest, order flow, and PnL tracking with materialized views precomputing heavy multi-table queries.
- Drove protocol optimizations that scaled Rain to $90M+ TVL and $60M+ cumulative trading volume, and 38K+ users.
- Built and led Rain’s Resolution Center (resolution.rain.one) for 400+ markets and USDR (usdr.live), Rain’s solvency-capped settlement stablecoin.
Technologies: Solidity, Node.js, Python, Alchemy, The Graph, Amazon S3 (AWS S3), Auto-scaling Cloud Infrastructure, Blockchain, Chainlink, Claude Code, Databases, Arbitrum, Datadog, Redis, MongoDB, Team Leadership, Socket.IO, WebSockets, FastAPI, PostgreSQL, Foundry, Docker, GitHub Actions, Decentralized Finance (DeFi), Prediction Markets, OpenZeppelin, Ethereum, Software Architecture, Software Engineering, AWS ECS Fargate, ERC-1155, ERC-721, ERC-20, GitHub, Cron, Next.js, Dune, DefiLlama, Code Review, CRM, Subsquid, Redis Cache, Data Structures, Programming, Ethers.js, Web3.js, IPFS, TypeScript, Express.js, GraphQL, REST, Microservices, BullMQ, Hardhat, ECS, EC2, LLM Pipelines, Structured Outputs, JavaScript, Data Warehousing, OOP Designs, Smart Contracts, Fintech, Technical Leadership, Trading Bots, Amazon, Generative Pre-trained Transformers (GPT), Web Scraping, React, Git, CI/CD Pipelines, Backups, Artificial Intelligence (AI), Model Context Protocol (MCP), Large Language Models (LLMs), Orchestration, Jira, AI Design, AI Programming
Blockchain Lead
2024 - PRESENT
Quecko
- Led a cross-functional team of 8 engineers to architect and deliver 5+ blockchain products.
- Built a load-balanced Python / FastAPI + PostgreSQL back end for a data-heavy marketing CRM, keeping most queries under 200 ms with Redis caching.
- Optimized back-end APIs for Gems (gems.vip), a multi-token presale platform including oracle pricing, tiered referrals, and vesting logic.
- Engineered Rocks (rocks.co), a token launchpad with automated token deployment and liquidity migration to Uniswap V3.
- Architected DOP Oracles, a human-driven on-chain decision oracle that breaks ties: voters are paid to vote on outcomes, and the majority result is enforced by smart contract.
- Mentored engineers on Solidity, auditing practices, and Foundry-based testing integrated with CI/CD.
- Led R&D on Ethereum execution/consensus clients by running Geth / Lighthouse nodes to launch new public blockchains.
- Contributed to JONI (joni.ai), a multi-agent AI assistant: agent orchestration, tool calling, and model routing via OpenRouter.
Technologies: Solidity, Python, FastAPI, PostgreSQL, Redis, Foundry, Geth (go-ethereum), Lighthouse, Alchemy, Amazon S3 (AWS S3), Anchor, Auto-scaling Cloud Infrastructure, Arbitrum, Base, Blockchain, BullMQ, Chainlink, Claude Code, Databases, Decentralized Finance (DeFi), Docker, EC2, ECS, Ethereum, Redis Cache, Subsquid, Team Leadership, CRM, Code Review, DefiLlama, Dune, Node.js, NestJS, Next.js, Cron, The Graph, LayerZero, MongoDB, GitHub Actions, Prometheus, Prediction Markets, Rust, OpenZeppelin, Solana, Software Architecture, Software Engineering, AWS ECS Fargate, Socket.IO, ERC-1155, ERC-721, ERC-20, Non-fungible Tokens (NFT), GitHub, CCIP, Data Structures, Programming, Wormhole, Ethers.js, Web3.js, IPFS, TypeScript, Express.js, GraphQL, REST, Microservices, WebSockets, Hardhat, LLM Pipelines, Structured Outputs, JavaScript, OOP Designs, Smart Contracts, Fintech, Technical Leadership, Trading Bots, Amazon, Generative Pre-trained Transformers (GPT), Web Scraping, React, Git, CI/CD Pipelines, Backups, Artificial Intelligence (AI), Model Context Protocol (MCP), Jira, AI Design, AI Programming
Blockchain Team Lead
2024 - 2024
Orbit Cosmos
- Supervised a team of 4 engineers delivering Pikamoon, a blockchain gaming ecosystem with complex staking, vesting, and tokenomics.
- Developed secure, gas-optimized contracts (Pika Token, staking, vesting) with 95%+ test coverage for audit readiness.
- Integrated contracts with the Pikamoon Hub dashboard and cut high-traffic query response times by 23%.
Technologies: Solidity, Node.js, The Graph, Redis, Foundry, MongoDB, Docker, Decentralized Finance (DeFi), OpenZeppelin, Ethereum, Blockchain, Software Architecture, Software Engineering, ERC-1155, ERC-721, ERC-20, Non-fungible Tokens (NFT), GitHub, Cron, Next.js, NestJS, Code Review, Team Leadership, Databases, Data Structures, Programming, Alchemy, GitHub Actions, Ethers.js, Web3.js, IPFS, Moralis, TypeScript, Express.js, GraphQL, REST, Microservices, BullMQ, Hardhat, EC2, Amazon S3 (AWS S3), JavaScript, OOP Designs, Arbitrum, Socket.IO, Smart Contracts, Fintech, Technical Leadership, Amazon, Web Scraping, React, Git, CI/CD Pipelines, Jira
Blockchain Lead
2023 - 2024
Codora
- Led a team of 6+ engineers across smart contracts and backend, owning architecture, code reviews and delivery.
- Architected and deployed DAU (dau.xyz) and Lexim Gold (lexim.gold), tokenized Swiss gold platforms across Ethereum, Arbitrum and Solana, with Halborn-audited smart contracts.
- Designed cross-chain bridge infrastructure integrating Axelar, CCIP, Wormhole, and LayerZero for NEXA Protocol.
- Led the architecture and secure deployment of vaults and user wallets tied to real-world assets.
Technologies: LayerZero, Chainlink, CCIP, Axelar, Node.js, NestJS, Solidity, GitHub Actions, GitHub, REST, PostgreSQL, Cron, The Graph, Redis, MongoDB, Decentralized Finance (DeFi), Anchor, OpenZeppelin, Ethereum, Solana, Blockchain, Software Architecture, Software Engineering, ERC-1155, ERC-721, ERC-20, Non-fungible Tokens (NFT), Next.js, Code Review, Redis Cache, Team Leadership, Databases, Data Structures, Programming, Alchemy, Wormhole, Docker, Ethers.js, Web3.js, IPFS, Moralis, TypeScript, Express.js, GraphQL, Microservices, RabbitMQ, Hardhat, EC2, JavaScript, OOP Designs, Arbitrum, Smart Contracts, Tokenization, Real World Assets, Fintech, Technical Leadership, Amazon, Web Scraping, React, Git, CI/CD Pipelines, Backups, Jira
Blockchain Developer
2022 - 2023
Codora
- Developed and deployed diamond proxy smart contracts for cross-chain asset handling on Atlas DEX.
- Built event-driven backend microservices with Node.js and MongoDB to index and process on-chain events in real time.
- Onboarded and mentored 3 junior engineers to full-stack blockchain proficiency.
Technologies: Node.js, MongoDB, Alchemy, Non-fungible Tokens (NFT), Anchor, NestJS, PostgreSQL, ERC-20, ERC-721, ERC-1155, Solidity, The Graph, Redis, LayerZero, GitHub Actions, Decentralized Finance (DeFi), Rust, OpenZeppelin, Ethereum, Solana, Blockchain, Software Architecture, Software Engineering, GitHub, Axelar, CCIP, Cron, Redis Cache, Databases, Data Structures, Programming, Wormhole, Chainlink, Ethers.js, Web3.js, IPFS, Moralis, TypeScript, Express.js, REST, Hardhat, EC2, JavaScript, OOP Designs, Arbitrum, Smart Contracts, Tokenization, Real World Assets, Fintech, Amazon, Web Scraping, React, Git, CI/CD Pipelines, Jira
Blockchain Back-end Engineer
2021 - 2022
Quecko
- Developed and deployed 10+ Solidity smart contracts on Ethereum for DeFi and NFT use cases.
- Built 5+ production back-end systems with Node.js (Express), event-driven architecture, and real-time indexing.
- Delivered smart contract logic and back end for a feature-rich NFT marketplace; led R&D on upgradeability and proxy deployments.
Technologies: Solidity, Node.js, MongoDB, Alchemy, Socket.IO, The Graph, Decentralized Finance (DeFi), OpenZeppelin, Ethereum, Blockchain, Software Engineering, ERC-1155, ERC-721, ERC-20, Non-fungible Tokens (NFT), GitHub, Cron, Redis Cache, Databases, Data Structures, Programming, Ethers.js, Web3.js, IPFS, Moralis, TypeScript, Express.js, REST, Hardhat, EC2, JavaScript, OOP Designs, Smart Contracts, Fintech, Amazon, Web Scraping, Git
Project History
Rain: Decentralized Prediction Markets Protocol with an AI Oracle
https://rain.oneRain is a permissionless, decentralized prediction markets protocol. Anyone can create and trade markets on any topic: crypto, politics, finance, sports, technology and more. The protocol runs on Arbitrum and also supports BNB Chain and Ethereum.
I have been Engineering Lead at Rain since January 2025, leading a team of more than 10 engineers across smart contracts, backend and infrastructure. I own the protocol's technical direction and architecture, and I run code reviews and delivery. Under my lead, Rain scaled to $90M+ TVL and $60M+ in trading volume, with a backend handling up to 6,000 transactions per second.
One of my main projects was Rain’s two-layer AI oracle. Olympus AI resolves AI-created markets using LLMs with web-search retrieval, and Lex AI adjudicates disputes from submitted evidence. Manual markets are resolved by their creator or a bonded proposer, with disputes also going to Lex.
I have been Engineering Lead at Rain since January 2025, leading a team of more than 10 engineers across smart contracts, backend and infrastructure. I own the protocol's technical direction and architecture, and I run code reviews and delivery. Under my lead, Rain scaled to $90M+ TVL and $60M+ in trading volume, with a backend handling up to 6,000 transactions per second.
One of my main projects was Rain’s two-layer AI oracle. Olympus AI resolves AI-created markets using LLMs with web-search retrieval, and Lex AI adjudicates disputes from submitted evidence. Manual markets are resolved by their creator or a bonded proposer, with disputes also going to Lex.
Rain Trade: Prediction Market Trading Platform
https://rain.tradeRain Trade is the trading platform built on the Rain protocol. Users can trade on real-world outcomes, create their own markets and earn rewards, across more than 15 categories including crypto, politics, finance, sports, weather and entertainment. It runs on Arbitrum, works with BNB Chain and Ethereum, and offers developer APIs for programmatic trading.
I led the engineering team that built and scaled the platform. That work covered the trading backend, the developer APIs, the on-chain integrations for creating, trading and settling markets, and the end-to-end user flow. I also built multi-process market-making bots in Python and FastAPI, running 10–25 concurrent markets at 50–150 orders/sec. They provide liquidity, keep spreads tight and improve price discovery for traders.
I led the engineering team that built and scaled the platform. That work covered the trading backend, the developer APIs, the on-chain integrations for creating, trading and settling markets, and the end-to-end user flow. I also built multi-process market-making bots in Python and FastAPI, running 10–25 concurrent markets at 50–150 orders/sec. They provide liquidity, keep spreads tight and improve price discovery for traders.
DAU: Multi-chain Tokenized Swiss Gold
https://dau.xyzDAU is a gold-backed digital asset issued by Du Bois Gold AG in Switzerland. Each DAU token represents one kilogram of 9999-fine Swiss gold, stored in insured, segregated vaults and owned directly by the holder. Users can transfer any amount peer-to-peer on-chain for a flat 0.05% fee and can redeem the physical gold at any time.
I led the architecture of the token infrastructure across Ethereum, Arbitrum and Solana. On the EVM chains, I built ERC-20 contracts for minting, burning, fee-bearing transfers, and compliance controls. On Solana, I used SPL Token Extensions. I also built back-end services that keep on-chain supply in line with vaulted gold and power the public Register of Title, so anyone can check that a token is backed. The smart contracts were audited by Halborn, and the platform supports monthly LBMA-certified reserve audits.
I led the architecture of the token infrastructure across Ethereum, Arbitrum and Solana. On the EVM chains, I built ERC-20 contracts for minting, burning, fee-bearing transfers, and compliance controls. On Solana, I used SPL Token Extensions. I also built back-end services that keep on-chain supply in line with vaulted gold and power the public Register of Title, so anyone can check that a token is backed. The smart contracts were audited by Halborn, and the platform supports monthly LBMA-certified reserve audits.
Lexim: Digital Trading Platform for LBMA & Swiss Gold
https://lexim.goldLexim is a digital marketplace for buying and trading LBMA-accredited physical Swiss gold. It makes the usually complex bullion-trading process simple: it adds liquidity, lets users own fractional amounts, and removes the need to store and transport gold themselves. The platform is bilingual (English and Chinese) and serves investors in Hong Kong and other Asian markets who want to hedge against inflation or preserve wealth.
I architected and built the backend, including services for live gold spot and bar pricing, user registration and account management, and order handling for physical-gold trades. I also built the integration with the DAU gold token, which connects off-chain trading with on-chain ownership.
I architected and built the backend, including services for live gold spot and bar pricing, user registration and account management, and order handling for physical-gold trades. I also built the integration with the DAU gold token, which connects off-chain trading with on-chain ownership.
Education
2016 - 2020
Bachelor's Degree in Computer Science
FAST-NUCES - Islamabad, Pakistan
Skills
Libraries/APIs
Node.js, OpenZeppelin, Web3.js, Socket.IO, React
Tools
RabbitMQ, Claude Code, GitHub, Git, Jira, Geth (go-ethereum), Lighthouse, Mocha, Cron
Languages
Solidity, TypeScript, JavaScript, GraphQL, Python, Rust
Frameworks
Alchemy, Express.js, Hardhat, NestJS, Anchor, Next.js
Platforms
Ethereum, Blockchain, Docker, Chainlink, Amazon
Storage
MongoDB, PostgreSQL, Redis, Amazon S3 (AWS S3), Databases, Redis Cache, Datadog, MySQL, Auto-scaling Cloud Infrastructure
Paradigms
REST, Microservices, Model Context Protocol (MCP)
Other
The Graph, Decentralized Finance (DeFi), Prediction Markets, Base, Ethers.js, Arbitrum, ERC-20, Software Engineering, Smart Contracts, Technical Leadership, Foundry, GitHub Actions, Solana, IPFS, Moralis, WebSockets, BullMQ, EC2, Structured Outputs, Programming, Data Structures, Team Leadership, Subsquid, Code Review, DefiLlama, Dune, Non-fungible Tokens (NFT), ERC-721, ERC-1155, Software Architecture, Tokenization, Real World Assets, Fintech, Trading Bots, Wormhole, Generative Pre-trained Transformers (GPT), Web Scraping, CI/CD Pipelines, Backups, Artificial Intelligence (AI), Large Language Models (LLMs), Orchestration, AI Design, AI Programming, FastAPI, LayerZero, Prometheus, ECS, LLM Pipelines, Data Warehousing, OOP Designs, CRM, CCIP, Axelar, AWS ECS Fargate
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