Experienced back-end engineer with 10+ years of expertise in high-concurrency systems. Proficient in Golang, Python, and C++, focused on delivering scalable and efficient solutions. Advanced machine learning skills for creating intelligent, data-driven applications. Proven leader in both large companies and start-ups, driving innovation and excellence. - Ensures applications handle heavy loads efficiently. - Creates smart, adaptive, data-driven AI applications. - Skilled in AWS, Azure, and Google Cloud. - Proficient with Redis, DynamoDB, Kafka, Nginx, MySQL, Postgres, Elasticsearch. - Experienced with ReactJS, TypeScript, TailwindCSS. - Leads teams, fostering innovation and success. - Proficient in Golang, Python, C++, TypeScript, Rust, C#.

As a Senior Developer with over a decade of experience, I’ve dedicated my career to mastering backend development and resolving complex performance issues across the entire stack. My expertise spans coding, databases, and underlying operating systems, where I’ve consistently delivered high-performance, scalable solutions. I specialize in optimizing and troubleshooting with a deep proficiency in Rust, PHP, MySQL, Varnish, nginx, Linux, FreeBSD, and AWS. My work has empowered clients like AWS Professional Services and Shure Inc. to achieve their goals, from building APIs that handle over 100,000 requests per second to creating custom, geographically distributed high-availability CDNs. One of my proudest achievements is maintaining an eight-figure monthly billing system, ensuring both reliability and efficiency at scale. Beyond technical skills, I’m known for my ability to communicate complex ideas clearly to non-technical stakeholders while effectively leading and mentoring junior developers. I’m passionate about continuing to push the boundaries of what’s possible in backend development and am always eager to take on new challenges that require innovative solutions and high-level problem-solving.

Hello, I'm Yuliia, a proficient Rust developer with extensive skills. I have experience in developing and maintaining robust backend projects. I worked on the application for organizing network cables within the city, aligning AI algorithms with geographic data to identify the most optimal path for network cables. I implemented a time series data visualization application utilizing the Iced and Plotters Rust libraries which allowed live interaction with the plots. Additionally I have experience in reimplementing Python applications in Rust, improving performance and reliability. I am committed to continuous learning, staying updated on the latest industry trends and technologies, and actively seeking opportunities to improve processes and systems for optimal performance. I used such technologies in my projects: - Rust - JavaScript - Leptos - Tauri - WebAssembly (WASM) - Actix Web (Axum) - Postgres - GraphQL - RabbitMQ - Docker - Optimization Algorithm Development Also I am adept in: - Git - Linux - API development With my professional approach and commitment to continuous improvement, I am prepared to contribute to your project, ensuring its optimal performance and quality.

I’m a Software/AI & VPS Engineer, I can fix anything with zero mistakes n build everythings easily n fastest, i got unlimited Codex token, love to do things OpenClaw, Blockchain, Pipeline, flutter, flutterflow, build tools, Internal tools, Modules, Bot, PineScript, Mod, sys Linux n i can copy any site 100% match quick n easy n i strong in backend and full-stack systems and build Web apps, Mobile Apps, Desktop Apps, Rust/Tauri, Electron, Browser Extension n trading system, n strong Web3 edge (EVM, Stellar & Solana). I turn ambiguous ideas into secure, reliable, human-centered products using TypeScript/JavaScript, React/Next.js, Node.js/Nest, Go, Python, Solidity, Rust (Anchor), and modern infra. I care about clean architecture, measurable impact, and great developer experience (DX) also so features ship fast and safe, also love building an Apps & AI things. for the security side, I bring pentest/audit mindset to every build: threat modeling, fuzzing & invariants, automated checks in CI, and clear, actionable reports. I also provide English technical translation/localization for whitepapers, docs, and UI strings. Languages: TypeScript/JavaScript, Vue, Go, Python, Solidity, Rust (Anchor), Php, Ruby, C & C++ Frontend: React, Next.js, Tailwind, Radix/shadcn, Vite, SSR/SSG/ISR, Flutter Backend: Node.js (Nest/Express/Fastify), Go (Gin/Fiber), GraphQL, REST, gRPC, WebSockets Web3: Solidity, Rust/Anchor, Hardhat, Foundry, OpenZeppelin, viem/wagmi, ethers.js, WalletConnect v2, Safe, The Graph, IPFS Testing: Jest/Vitest, Playwright, Supertest, Foundry (fuzz/invariants), Slither, Echidna Data: PostgreSQL, MySQL, SQLite, Prisma/TypeORM/Knex, Redis DevOps: Docker, GitHub Actions, basic K8s, AWS/GCP basics, Sentry, OpenTelemetry, Tenderly, OpenZeppelin Defender Security: OWASP ASVS/API, RBAC/ABAC, token design, key/secret rotation, rate limiting & anomaly detection, audit reports DeFi staking: with upgradeable proxies storage-safe upgrades, 0 criticals in audit NFT marketplace royalty splits, subgraph indexing, gas-optimized listings Solana program PDA-secured escrow with CPI, wallet-adapter UX, >95% test coverage Payments & off-chain settlement Webhooks + queues, idempotent APIs, chargeback handling Security engagement BOLA/IDOR class bugs identified; implemented header-precedence fixes & authZ binding

Hey! I'm Bhavya, a Senior Software Engineer experienced in building scalable blockchain platforms and production-ready backend architectures for startups and enterprises. 𝗜 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗲 𝗶𝗻: 𝗦𝗺𝗮𝗿𝘁 𝗖𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝘀 & 𝗢𝗻-𝗖𝗵𝗮𝗶𝗻 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝘀 (𝗘𝗩𝗠 + 𝗦𝗼𝗹𝗮𝗻𝗮) • Solidity: ERC-20, ERC-721, ERC-1155, role-based and modular systems • DeFi logic, staking, vesting, token flows, marketplace mechanisms • Cross-chain patterns and multi-chain asset logic (L2s, bridges, relayers) • Contract security, invariant checks, audits, gas optimization • Solana (Rust): SPL tokens, PDAs, CPI calls, staking/vesting/escrow programs • Anchor framework and performance-oriented custom Rust programs 𝗪𝗲𝗯𝟯 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 • Go (advanced) and Rust backend development • Blockchain indexers, listeners, and event-driven data pipelines • Wallet abstractions, signer services, automated distribution engines • RPC/WebSocket integrations and backend-driven smart contract interactions • High-performance APIs for dashboards, token analytics, or marketplaces 𝗪𝗲𝗯𝟯 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 • Next.js / React dApps • Wallet integrations (MetaMask, WalletConnect, Phantom, Ledger) • Client-side signing and secure transaction flows • Applications for minting, staking, swaps, dashboards, and marketplaces • ethers.js / web3.js / @solana/web3.js integrations 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗜 𝘄𝗼𝗿𝗸 𝗼𝗻 𝗶𝗻𝗰𝗹𝘂𝗱𝗲: • Smart contract systems (Solidity / Solana Rust) • Tokenization, identity systems, marketplaces, and DeFi workflows • Backend microservices for dashboards, SaaS tools, or launchpads • Cross-chain applications, high-security wallets, and cryptographic libraries • Blockchain infrastructure, RPC tooling, and protocol-level extensions 𝗬𝗼𝘂 𝗴𝗲𝘁: • Clean, maintainable, production-ready code • Clear communication and proactive problem-solving • Senior-level product thinking (not just coding tasks) • Architecture that avoids future technical debt • Fast execution without compromising quality 𝗜 𝗽𝗿𝗶𝗼𝗿𝗶𝘁𝗶𝘀𝗲 𝗰𝗹𝗮𝗿𝗶𝘁𝘆, 𝘀𝗽𝗲𝗲𝗱, 𝗮𝗻𝗱 𝘆𝗼𝘂𝗿 𝘀𝗮𝘁𝗶𝘀𝗳𝗮𝗰𝘁𝗶𝗼𝗻, 𝗽𝗿𝗼𝘃𝗶𝗱𝗶𝗻𝗴 𝗹𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝘀𝘂𝗽𝗽𝗼𝗿𝘁 𝗳𝗼𝗿 𝗲𝘃𝗲𝗿𝘆 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆. 𝗟𝗲𝘁'𝘀 𝗵𝗼𝗽 𝗼𝗻 𝗮 𝗾𝘂𝗶𝗰𝗸 𝗰𝗮𝗹𝗹 𝗳𝗼𝗿 𝘆𝗼𝘂𝗿 𝗻𝗲𝘅𝘁 𝗽𝗿𝗼𝗷𝗲𝗰𝘁!

I build blockchain payment systems and high-performance backends that handle real money and real users. My last client hired me to architect a full payment platform on the XRPL — a $2,000+ engagement delivered on time with a 5-star review. If you need a developer who can go from protocol-level blockchain work to production-ready APIs, keep reading. I specialize in two areas where quality talent is hard to find: blockchain development (XRPL, Solana, smart contracts, wallet integrations) and high-performance backend systems in Rust and Python. Most developers know one or the other. I work across both, which means fewer handoffs and faster delivery for you. Recent work includes building the backend infrastructure for Ciperpool's ASI Project (Rust-based, blockchain-integrated), developing an eBay automation bot that handles listing analysis at scale, and integrating LLMs into production applications with Handshake AI. My stack: Rust, Python, TypeScript, Node.js, React, PostgreSQL, Docker, and Kubernetes. I pick the right tool for the problem, not the other way around. What working with me looks like: clear communication, no scope surprises, and code that's built to maintain — not just to ship. Every one of my contracts has ended with a 5-star review. Currently completing my M.S. in Software Engineering from Quantic School of Business and Technology, with a backend engineering credential from AltSchool Africa. If you're building anything involving blockchain infrastructure, Rust backends, or complex full-stack systems, send me an invite or message. I respond within a few hours and I'm happy to scope your project before we start a contract.

𝗬𝗼𝘂 𝗯𝘂𝗶𝗹𝘁 𝘆𝗼𝘂𝗿 𝗠𝗩𝗣 𝗶𝗻 𝗟𝗼𝘃𝗮𝗯𝗹𝗲, 𝗖𝘂𝗿𝘀𝗼𝗿, 𝗼𝗿 𝗖𝗹𝗮𝘂𝗱𝗲 𝗖𝗼𝗱𝗲. 𝗪𝗶𝗹𝗹 𝗶𝘁 𝘀𝘂𝗿𝘃𝗶𝘃𝗲 𝗿𝗲𝗮𝗹 𝘂𝘀𝗲𝗿𝘀? I'm a full stack developer who turns AI prototypes into secure, production-ready software for founders. The demo you built with Lovable, Claude Code, or Bolt looks finished. As launch approaches, the real state of the code surfaces: authentication nobody verified, Supabase rules left wide open, edge cases that crash on unexpected input, and every new feature breaking two existing ones. The AI carried you 80% of the way, and the remaining 20% determines whether you launch a product or an incident. If any of this sounds familiar, you're in the right place: 🔑 "We built an internal tool in Lovable or Base44, and now we want real customers on it with 99%+ uptime." 🔑 "Our operations are scattered across Airtable, HubSpot, AppSheet, Google Sheets, n8n automations, and AI agents; we want one platform." 🔑 "Our Claude Code prototype works, but we need someone to deploy it on AWS or DigitalOcean and run operations as we grow past 10k users." 🔑 "Our Lovable app is finished; now we need it in the App Store and on Google Play." Here's how I can help: 🎉 Launching soon? I audit the AI-generated code, close security gaps (authentication, Supabase RLS, input validation, exposed API keys), and add the tests and CI/CD your prototype never had. 🎉 Opening an internal tool to real users? I harden it into a production platform with roles and permissions, monitoring, and infrastructure engineered for 99.9% uptime. 🎉 Drowning in disconnected tools? I consolidate your Airtable, HubSpot, AppSheet, and Google Sheets work, plus n8n and Make automations and AI agents, into one custom application. 🎉 Need someone to own production? I deploy to AWS, Google Cloud, or DigitalOcean with Docker and CI/CD, then handle operations, backups, and scaling past 10k users. 🎉 Want your app on phones? I package your Lovable or React app and publish it to the App Store and Google Play. 🎉 Worried a developer will demand a rewrite? I refactor the codebase you already paid for, then scale it with PostgreSQL tuning, caching, or Golang and Rust when traffic requires. I started my career at one of Latin America's largest payment processors, building authentication, encryption, and input validation for systems handling real financial transactions. Since then I've led full stack SaaS development on Laravel, Next.js, and React, delivered Golang and Rust contracts on Upwork, and built LLM and RAG features on OpenAI and Claude. I use Lovable and Claude Code daily, so I know precisely where these tools take shortcuts. From past clients: 🏅 "Very pleasant to work and interact with... Never late. Great English." - Verified Upwork client, Rust cryptography project 🏅 "Ran took the MVP we built in Lovable and made it production-ready. He caught security issues we didn't know we had, and 2 months after launch we're past 1,000 users." - Launched car parts marketplace in 4 weeks The numbers behind that: ✅ 6 years building production software across fintech, SaaS, and systems-level backends ✅ Certified by Anthropic in Claude Code, Silver Vibe Coder on Lovable 🛠️ My daily stack: ✔ AI and LLM: Claude Code, Cursor, Lovable, Bolt, OpenAI API, Anthropic Claude, LangChain, RAG pipelines ✔ Backend: Laravel, PHP, Golang, Rust, Node.js, Python ✔ Frontend and mobile: React, Next.js, TypeScript, Tailwind CSS, Capacitor (App Store and Google Play) ✔ Databases and cloud: PostgreSQL, Supabase, MySQL, AWS, Google Cloud, DigitalOcean, Docker, GitHub Actions ✔ Business tools and automation: Airtable, Google Sheets, AppSheet, HubSpot, Zoho CRM, n8n, Make, AI agents ✔ Integrations: Twilio (SMS, WhatsApp, A2P), payment and messaging APIs 📩 READY WHEN YOU ARE: Send me your Lovable link or repository and tell me where it worries you. I'll reply with the first 3 fixes your app needs and an honest read on whether I'm the right fit; if not, I'll say so.

❗️𝗚𝗲𝘁 𝗮 𝗙𝗥𝗘𝗘 𝟒𝟎-𝗺𝗶𝗻𝘂𝘁𝗲 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗖𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻❗️ I’m a senior blockchain engineer focused on building and scaling production-grade Web3 systems, from smart contracts to full DeFi architectures and backend integrations. I collaborate with security auditors (including Certik) on selected projects when formal audit stage is required, but my main focus is clean architecture, secure contract design, and long-term maintainability before audit even becomes necessary. 🏆 Blockchain Expertise 11+ years building Web3 infrastructure, including: Smart contract development (Solidity, Rust, Move) Tokenomics & stablecoin architecture DeFi protocols: staking, liquidity pools, AMMs, lending/borrowing Wallet & blockchain integration Cross-chain bridges & interoperability Security audits, gas optimization, and threat analysis Node setup, backend APIs, indexing & on-chain data pipelines 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝗲𝗱 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀: Gold-backed Stablecoin System (Liechtenstein Launch) ✔ KYC onboarding, Sumsub integration ✔ Smart contracts on Ethereum + Polygon ✔ Oracle pricing + OTC gold price feeds ✔ Token mint/burn mechanics ✔ Reserve-backed auditing model ✔ Whitelist & transfer-restriction compliance ✔ Storage-fee mechanism (token balance decay) ✔ Full on-chain/off-chain architecture DeFi Protocols (AMMs, staking, farming) ✔ Smart-contract suite (Solidity) ✔ Reward distribution mechanisms ✔ Price oracle integration (Chainlink) ✔ Security hardening & audit fixes NFT platforms & minting engines ✔ ERC-721 / 1155 collections ✔ Royalty logic, metadata generation ✔ Claiming contracts, allowlists, randomness 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸: Smart Contracts: Solidity, Rust (Solana), Move (Aptos/Sui) Frameworks: Hardhat, Foundry, Truffle, Anchor Security: Slither, Mythril, Echidna, Certora On-Chain Data: TheGraph, SubQuery, custom indexers Blockchains: Ethereum, Polygon, BNB Chain, Arbitrum, Optimism, Avalanche, Solana, TON Backend: Node.js, NestJS, PostgreSQL, Redis, Docker Tools: Chainlink, Safe (Gnosis), IPFS, Pinata, Fireblocks Want a secure, scalable blockchain product, not a risky MVP? Send the documentation, and let’s build it correctly from day one. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Blockchain, Web3, Blockchain Developer, Web3 Developer, Smart Contract Developer, Solidity Developer, Rust Developer, Move Developer, Ethereum Developer, DeFi Developer, Smart Contract Audit, Security Audit, Tokenomics, Stablecoin Development, NFT Development, ERC20, ERC721, ERC1155, Solidity Engineer, Blockchain Architecture, DApp Backend, Oracle Integration, Chainlink, Hardhat, Foundry, Web3 Security, Multi-Chain Deployment, DeFi Protocol, Yield Farming, Staking Contract, Vesting Contract, Governance Token, On-Chain Data, TheGraph, EVM Developer, Crypto Developer, Blockchain Consultant, Token Development, ICO/IDO Smart Contracts, Bridge Development, Layer 2 Developer, Polygon, Arbitrum, Optimism.

I help teams fix slow, brittle, and hard-to-scale systems. If your backend is becoming difficult to maintain, deployments are risky, or performance is degrading under load, I step in to stabilize and restructure it without disrupting your business. What I specialize in: • Refactoring and stabilizing legacy or poorly structured systems • Designing and implementing scalable microservices architectures • Debugging hard production issues (race conditions, memory leaks, bottlenecks) • Building high-performance backends in Rust, TypeScript, and Python • Improving CI/CD pipelines to reduce deployment time and risk Recent results: • Reduced deployment time from hours to minutes by restructuring CI/CD pipelines • Identified and eliminated performance bottlenecks, improving response times by 3-10x • Refactored tightly coupled systems into modular services, enabling faster feature delivery • Resolved critical production bugs that other developers couldn't isolate How I work: I approach every system as an engineer, not just a coder. I analyze root causes, design clean solutions, and implement changes that make your system easier to scale, maintain, and extend. I prioritize: • Clear architecture and separation of concerns • Measurable performance improvements • Minimal disruption to ongoing operations Tech stack: Rust, TypeScript, JavaScript, Python, distributed systems, microservices, cloud infrastructure If you're dealing with a system that's slowing your team down or breaking under growth, I can help you get it back under control.

Most blockchain products don't fail because of a bad idea. They fail because of a missed security check, an inefficient contract, poor protocol design, or infrastructure that can't handle real users. Whether it's a DeFi protocol, DEX, staking platform, NFT ecosystem, or token launch, one small mistake can put funds, users, and your reputation at risk. Building secure, scalable blockchain products that perform under real-world conditions is what I focus on. I'm a blockchain developer with 6+ years of experience designing and building production-ready applications across Solana and EVM ecosystems. I work with startups, Web3 teams, and established companies to turn complex blockchain ideas into reliable products from smart contracts and protocol development to full-stack decentralized applications and backend infrastructure. Over the years, I've contributed to products that have supported millions of users, routed billions in transaction value, maintained high availability, and powered secure on-chain operations across multiple blockchain networks. Some of the blockchain products I've worked on : ** High-Performance Solana DeFi Infrastructure** – Built core infrastructure for a Solana ecosystem including a DEX aggregator, validator services, high-performance RPC, and developer SDKs. Worked extensively on transaction optimization, gasless user experiences, MEV-aware routing, and real-time blockchain data streaming to deliver fast and reliable DeFi infrastructure. **Blockchain Credential Platform** – Developed a platform that issues and verifies permanent digital certificates using compressed NFTs on Solana. The solution enables organizations to create tamper-proof credentials that remain publicly verifiable while significantly reducing on-chain storage costs. **Web3 Social & NFT Marketplace** – Helped build a decentralized social platform where users can mint content as NFTs, trade digital assets, earn royalties, and manage identities through wallet authentication. The platform included marketplace functionality, referral systems, KYC integration, and scalable backend services. My technical stack includes Rust, Anchor Framework, Solana Program Library (SPL), Token-2022, Metaplex, Solana Web3.js, Solidity, Ethereum, EVM-compatible chains, DeFi protocol development, DEX architecture, NFT infrastructure, smart contract development, Node.js, TypeScript, React, PostgreSQL, Docker, Kubernetes, AWS, GCP, REST APIs, GraphQL, WebSockets, CI/CD, and comprehensive testing across localnet, devnet, and mainnet environments. I believe successful blockchain development is about more than writing smart contracts. Every feature is designed with security, performance, maintainability, and long-term scalability in mind. I communicate progress clearly, document important decisions, and deliver thoroughly tested code that teams can confidently deploy to production. If you're building a DeFi protocol, decentralized exchange, staking platform, token ecosystem, NFT marketplace, Web3 application, or any blockchain product where security and reliability matter, I'd be happy to discuss your project. Even if you're still refining the idea, send me a message I'll provide an honest assessment, recommend the best technical approach, and let you know how I can help bring it to production.