🚀 Building high-performance systems that don’t break under scale.
If you need a developer who can handle complex backend logic, blockchain infrastructure, or AI-powered systems — I deliver solutions that are fast, secure, and production-ready.
I’m a Security engineer, Blockchain Developer, and AI Specialist with deep expertise in building scalable, real-world systems. I don’t just write code — I design architectures that perform under pressure, handle edge cases, and are built for long-term growth.
💡 What I Bring
✔️ End-to-End Development
From idea to deployment — clean frontend, powerful backend, and scalable infrastructure.
✔️ Blockchain & Cryptography Expertise
Smart contracts, DeFi platforms, and deep knowledge of elliptic curve cryptography (ECC), including secp256k1.
✔️ AI-Powered Systems
Automation, intelligent workflows, and data-driven applications that improve efficiency and decision-making.
✔️ Performance Optimization
I specialize in making systems faster, lighter, and more efficient — especially in computation-heavy environments.
🔐 Advanced Expertise (What Sets Me Apart)
- 10+ years working with Elliptic Curve Cryptography (ECC)
- Deep experience in low-level optimization & high-performance computing
- Strong background in GPU parallel processing & cryptographic algorithms
- Built ultra high-performance Bitcoin vanity address generation system (massively parallelized)
I focus on turning complex mathematical and system-level concepts into production-grade implementations that actually work at scale.
🛠 Tech Stack
Languages: Rust, Go, Python, TypeScript
Core Areas:
- Backend Systems & APIs
- Blockchain (Solidity, Rust)
- AI/ML Systems
- High-Performance Computing
🎯 What You Can Expect
- Clear communication & fast response
- Clean, maintainable, production-ready code
- Strong focus on performance, security, and scalability
- Ability to handle complex, non-trivial problems
🚀 Let’s Build Something Serious
If your project involves complex systems, performance challenges, or cutting-edge tech (AI / Blockchain) — I’m the kind of developer you bring in to get it done right.
Blockchain Architecture
Artificial Intelligence
Web Application
Web Development
Elliptic Curve Cryptography
Cryptocurrency
TypeScript
Python
Golang
C++
Rust
Decentralized Exchange
Arda A.
Istanbul, Turkey
$65/hr
5.0
48 jobs
I take custom projects from a blank page to a live product, without unnecessary complexity. Coding agents make me fast. Engineering fundamentals make it last.
No agency, no handoffs: I've shipped 60+ custom apps - SaaS MVPs, AI agents, LLM systems, RAG pipelines, and AI integrations into products that already exist - for non-technical founders, CEOs and technical teams. Shipping that many taught me the hard part was never the code. It's knowing what to build, what to leave out, and what will break in month six.
As a full stack software engineer & AI engineer, what I usually get hired for:
- Custom SaaS MVPs or internal tools
- AI consulting: an audit of what you have, and where AI is worth the money
- AI automation for a workflow you're doing by hand
- A vibe-coded app that now has to survive real users
- Custom AI agents for one person or a whole team
- Multi-agent systems that run on their own or work alongside humans
- AI integration into an existing business
- A niche problem you're starting to think nobody can solve. Test me.
Blank page to live product:
1. Scope: straight into your business goal. I push back on assumptions to find what's needed and what isn't, so nothing gets over-scoped.
2. Architect: simplest structure that scales, plus a diagram of the whole flow. Once the problem is clear, I move fast.
3. Build: agents do the typing. Dependencies minimal, the AI boxed off so a bad model answer can't break the rest.
4. Deploy: live, monitored, documented, handed over.
5. Support: I stick around. Little maintenance by design.
Every milestone, I check the strategy still serves the goal. Same person at every stage. Nothing ships I can't explain.
I've built for:
Talent Tech, DTC (3M+ audience), Industrial & Robotics, Healthcare Data, Climate Tech, Global Fintech, Telecom, Web3 Community, Growth & AI Agencies, and EdTech - and expanding.
More than an engineer:
I architected a complete B2B AI SaaS in a competitive space and got the first paying clients in 3 months by talking to ICPs myself. That's where the outcome-based instinct comes from: knowing which technical decisions actually move your business and which ones are just interesting.
I enjoy turning chaos into deterministic systems.
How I build:
Complex ideas don't always need complex solutions. I go for the simplest (not basic) option - one that follows best practice and scales as your business does. I only decide what that looks like after I properly understand what you need, and those calls come from having made them before.
I follow these principles in my work:
🦾 Scalable: I make things that can grow as your business grows.
🗺️ Understandable: Even though the solution is technical, I will prepare a high-level diagram that shows you the big picture and the whole flow.
📦 Reusable: I value modularity to save time in your various projects with similar functionalities.
💼 Industry Standards: I rely on proven engineering practices at the project's core.
🌱 Sustainability: I design solutions that need as little maintenance as possible from day one, and I support them long-term.
My top talents:
✅ AI Solution Design & Development (this field moves fast - I keep up.)
✅ Full Stack Development (End-to-end SaaS, Web Apps, Internal Tools)
✅ Backend Development (API Integrations & Automations)
TLDR:
If you have a product idea, a system that's become a mess, or a problem you're not sure is solvable, send me a message to see if we're a good fit. If we're a match, great. If not, I'll make sure you leave with clarity on your next steps.
💻 Tech Stack & Tools I Use:
👉 Backend: Python, FastAPI, Django, Django-REST
👉 Frontend: React, TypeScript, TanStack, Tailwind CSS, Vite, HTML
👉 Database: PostgreSQL, MongoDB, MySQL, Supabase
👉 Background Tasks: Celery, Redis, Google Cloud Run, Flower
👉 Git, GitHub & Docker
👉 Model Context Protocol (MCP) servers & clients
👉 AI Coding Tools: Claude Code, Cursor, Google Antigravity, Codex
👉 OpenAI API (GPT, Whisper, TTS, Embeddings, DALL-E), Groq, AWS SageMaker, AWS Bedrock, microsoft/autogen, VAPI (Voice AI), DeepSeek, Open Source Models, Gemini API (LLM Models & Nano Banana Pro), Claude API (Sonnet, Opus), fal.ai API
👉 Pinecone, pgvector for Postgres (Vector Database to store embeddings)
👉 Automation: n8n, Make, Zapier, Crawl4AI, Playwright, BeautifulSoup, pandas
👉 Render, Google Cloud, DigitalOcean, Heroku, AWS
👉 APIs: Slack, Discord, Telegram, HubSpot, LemList, LinkedIn, ClickUp, Webhooks, Fireflies (Call Transcription), AssemblyAI (Voice to Text), Automated PDF generation, Typeform, Ashby, Loxo, Polar.sh, Stripe
- I pick up new tools fast, so this list isn't a limit!
A bit more about me:
I like explaining how things work, which is how I ended up running a YouTube channel where I explained complicated technical things in a way anyone could follow. I also wrote a 10-hour course on backend architecture for Miuul, one of the bigger tech education platforms here.
AI Agent Development
Automation
React
FastAPI
Generative AI
Full-Stack Development
Software Architecture & Design
SaaS Development
AI Consulting
API Development
API Integration
Claude
OpenAI API
AI Development
Python
TypeScript
Large Language Model
AI Model Integration
AI App Development
Retrieval Augmented Generation
Mehmetcan Burak K.
Istanbul, Turkey
$70/hr
4.6
18 jobs
⭐⭐⭐⭐⭐ 5/5 Rating ✔️ Fluent English ✔️ Fluent German 💡 Problem Solver 💡 Team Player
9 Years of experience in software development. Great communication skills. Guarantee customer satisfaction. From requirement analysis to production i have involved for all processes of software development lifecycle. I can create the SDLC from scratch.
🚀 Vast experience in :
---------------------------
✅ Spring Boot & Java
✅ Blockchain technologies - NFT - Smart Contracts
✅ Solidity & Web3, Etherjs, Metamask integrations
✅ Angular 2+, React, CSS, HTML, Tailwindcss, Angular Material
✅ NodeJs, NestJs
✅ Django, Python
✅ Data collection and Web scraping
✅ Requests, Selenium Webdriver & Chrome Extensions
✅ Web / Desktop
✅ MySQL, PostgreSQL, MongoDB
✅ Camunda BPMN
Core skills:
---------------------------
➡️ Self-motivated, Proactive, and team player.
➡️ Love to help, strong social skills, great problem solving skills.
➡️ Obstacle Remover
➡️ Fullstack developer from requirement to SDLC, experienced in all software development lifecycle.
I DO:
---------------------------
✔️ Deliver work on time.
✔️ Guarantee the quality.
✔️ Enjoy challenges.
✔️ Responsive.
I DON'T
---------------------------
❌ Overpromise, under deliver.
❌ Say 'Yes' when I shouldn't.
❌ Waste your time and budget.
I love to meet new people and share ideas, let me introduce myself to you. I look forward to speaking with you soon.
Blockchain
Blockchain Architecture
Smart Contract
Solidity
web3.js
Node.js
Java
Python
NoSQL Database
Spring Framework
SQL
Angular
React
Spring Boot
Melih Can M.
İzmir, Turkey
$50/hr
5.0
1 jobs
👋 Hi, I’m Melih Can MAVİŞ — a Full-Stack Developer, Blockchain Specialist, and SaaS Architect with 9+ years of experience building scalable web platforms, crypto ecosystems, and automation tools for startups and enterprises.
🧩 What I Bring:
🌐 Web & SaaS Development
• Custom dashboard and admin panel development
• Full-stack expertise (PHP, Laravel, Node.js, React, MySQL, Next.js)
• Payment integration (Stripe, crypto, invoice systems)
• Web2 & Web3 hybrid platforms
🪙 Blockchain & Crypto Systems
• Token launches (ERC20, BEP20, SPL, TRC20)
• ICO / IDO / Airdrop platforms
• Staking, vesting, and multi-wallet systems
• WalletConnect, MetaMask, TronLink, Ledger integrations
📊 Custom Business Tools & Automations
• Telegram/Discord bots, automation flows (n8n, Zapier)
• Reporting dashboards, email systems, and CRMs
• Admin-controlled user portals & subscription logic
• Compliance tools and API integrations (CoinGecko, SolScan, Etherscan)
🧠 How I Work:
• Highly structured & transparent communication
• Strong documentation & version control discipline
• Always security-conscious, performance-focused
• I treat your project like my own product
🎯 Whether you're launching a SaaS product, optimizing an internal system, or entering the Web3 space — I’ll help you build it, scale it, and make it sustainable.
📬 Let’s build something powerful — together.
Blockchain
Blockchain Development
PHP
Python
Java
JavaScript
HTML5
CSS 3
Web3
web3.js
Blockchain Development Framework
Blockchain, NFT & Cryptocurrency
Blockchain Platform
Crypto Wallet
DApp Development
Vladislav D.
Antalya, Turkey
$60/hr
5.0
15 jobs
Senior Rust & Blockchain Developer with 14+ years in software engineering. Transitioned from C++ systems programming to Rust, now specializing in Polkadot SDK — developed 10 custom FRAME pallets for production blockchain.
Rust expertise: Axum, Tokio, SQLx, Tauri, Yew/WASM, Polars, teloxide. Full-stack capabilities from backend APIs to desktop apps.
Blockchain: Polkadot SDK, Substrate, FRAME pallets, Solidity, Ink!, cross-chain integrations.
Also proficient in: C++ (STL, Boost, Qt, OpenCV), TypeScript, Python. Strong background in testing (cargo nextest, tarpaulin, proptest) and CI/CD pipelines.
Active in AI-assisted development — building Claude Code plugins and practicing spec-driven workflows.
Rust
Polkadot
Claude
TypeScript
Node.js
Asynchronous I/O
C++
C
Algorithm Development
SQL
Git
Qt Framework
Python
Batuhan K.
Istanbul, Turkey
$29/hr
5.0
1 jobs
I am a Blockchain Developer with 3+ years of hands-on experience, primarily focused on backend-heavy Web3 systems. I have designed, built, and deployed a wide range of DeFi and blockchain-based platforms, from the ground up, with a strong emphasis on scalability, security, and real-world usability.
Throughout my career, I’ve worked on DeFi protocols, blockchain games, swap (DEX) platforms, and memecoin ecosystems. One of my largest and most complex projects is a Pump.fun-equivalent meme launch platform on the BSC network, handling token launches, liquidity mechanics, on-chain interactions, and backend infrastructure.
I have extensive experience with:
-Smart contract–driven platforms
-Token launch & memecoin infrastructure
-DEX / swap platforms
-Blockchain games
-Wallet-related systems, including building a custom blockchain wallet
-Chrome extensions with blockchain and wallet integrations
Although I am 100% a Web Developer by profession, I also actively use Python outside of web development to build:
-High-volume trading bots
-Arbitrage bots
-Automation tools interacting with blockchain data
My approach is always solution-oriented: I don’t just write code, I design systems that are reliable, maintainable, and aligned with business goals. I’m comfortable taking full ownership of a project—from architecture and backend logic to deployment and optimization.
Clear and regular communication is very important to me. I believe the best results come from transparency, collaboration, and staying aligned throughout the project lifecycle.
If you’re looking for a developer who truly understands Web3, DeFi mechanics, and backend architecture. I’m ready to help.
Blockchain Development
Blockchain Platform
Cryptocurrency Mining
Web Application
Web Development
PHP Script
Mining
Smart Contract Development
Crypto Wallet
Crypto Asset
Uniswap
JavaScript
Python
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