Hire the Best Bitcoin Developers
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Marton C.

Berlin, Germany

$90/hr
5.0
6 jobs

I'm an AI Engineer & Strategist (PhD in CS) who solves the #1 problem businesses face: 'We’ve spent 6 months building AI, but I still can't tell if it actually works.' Most businesses I work with are stuck with: • Features that look good but fail in production because they lack proprietary, robust logic. • Talented engineering teams who lack the specialized AI capabilities required to build auditable, verifiable systems. • Architecture that works for 10 users but will trigger massive security or cost liabilities when signing your first enterprise client. With 15+ years of experience and having architected 20+ high-stakes AI pipelines, I bridge the gap between complex AI research and agile, production-grade software engineering. I provide the senior technical expertise you need to eliminate repetitive workflows using production-grade, safe, and auditable AI automation and ensure your technology is an asset for your business or your next funding round. Recent work: • For a RegTech SaaS: Built a hybrid RAG pipeline with durable workflow orchestration (Temporal). Result: AI responses with 100% citation provenance for regulated document analysis. • For a wellness startup: Architected a 4-agent LLM coaching system with dynamic 6-layer prompt assembly and emotional intensity mapping. • For a cross-chain DEX: Engineered the backend for trustless atomic swaps between Bitcoin/Lightning and EVM/Starknet ecosystems. • Enterprise identity: Led the research and delivery of the KILT Protocol mainnet, including a Deloitte-partnered KYC integration. My pipelines consistently deliver: ✅ 40–80% reduction in manual work ✅ 99%+ accuracy, even in regulated environments ✅ Hours reclaimed per employee, per week ✅ Measurable ROI within 30–90 days How I help your business: ✅ AI strategy & advanced RAG: I provide the elite technical oversight your team needs to eliminate repetitive manual workflows, build safe AI systems, and ensure your technology is a major asset for your next funding round. ✅ Security and compliance: Deep expertise in building verifiable pipelines, secure cloud data flows, and SOC2-ready architectures. ✅ Engineering leadership: I work directly with your developers, streamline your sprint cycles, and implement CI/CD pipelines that ensure your team ships weekly, not monthly. ✅ Technical due diligence: I ensure your codebase and IP are fully optimized for institutional scrutiny during M&A or venture capital funding rounds. Technical expertise: • AI / LLMOps: Python, Pydantic AI, LangGraph, LangChain, PyTorch, Vector Databases, Graph-RAG, Semantic Search, Prompt Engineering, Model Evaluation, Fine-Tuning, Embeddings. • Backend & cloud infrastructure: TypeScript, SQL, Docker, Kubernetes, Terraform, AWS, Azure, GCP, Distributed Systems, CI/CD. • Automation & enterprise tech: n8n, Document Intelligence (Docling), LegalTech/FinTech compliance automation, Decentralized Identity (DID). I can quickly adapt to your stack and I am always happy to learn new tools. How we can work together: ✅ Technical audit and roadmap: We start with a deep dive into your current stack. I identify friction points in accuracy or scale and provide a written assessment with specific, technical recommendations. ✅ Fractional leadership: I join your Slack/Teams, manage the development cycle, and take ownership of the hard technical decisions so you can focus on growth. ✅ Specific sprints: Need a specific RAG pipeline or smart contract protocol built? I offer fixed-scope engagements for high-priority feature launches. Want to get started? Click the "Invite to Job" button. Tell me about your current stack and what would make our first call a success for you.

  • Artificial Intelligence
  • System Deployment
  • n8n
  • API Integration
  • Python
  • Machine Learning
  • Web Development
  • TypeScript
  • Next.js
  • Google APIs
  • Generative AI
  • DevOps
  • Microsoft Azure
Irfan O.

Kempten, Germany

$50/hr
5.0
1 jobs

Dedicated and professional software developer for 15+ years and have wide knowledge in IT industry. Specialized in Blockchain/Cryptocurrency development, recent 5 years. My skills are following: - Cryptocurrency Exchange Platform(CEX&DEX), Peatio - 0x Protocal, ICO, ERC20-223, ERC721, Solidity, Smart Contract, Web3 - Coin Fork(Bitcoin, Ethereum, Stellar, EOS, IOTA, Cardano, Tron, XRP, NEO, Monero, PIVX) - Cryptocurrency Wallet(Web & Android & iOS & Desktop) - GoLang, Python, Ruby on Rails(ROR), Django, Node - Wordpress, WooCoomerce, Magento - ASP.NET, ASP.NET MVC, C#, C/C++, Java - Laravel, CodeIgniter, Symfony - React, Vue, Angular Will provide best quality work in a timely manner.

  • Bitcoin
  • Golang
  • Ruby on Rails
  • Cryptocurrency
  • Smart Contract
  • JavaScript
  • React
  • Blockchain
  • WordPress
  • Ethereum
Andreas B.

Berlin, Germany

$42/hr
5.0
2 jobs

I help e-commerce businesses increase profitability through performance engineering, data intelligence, and AI-powered process optimization. I specialize in the intersection of E-Commerce, Data, Performance Engineering, and AI. My clients typically come to me when: • Their store is growing but operations are becoming inefficient • Analytics and tracking can no longer be trusted • Performance issues affect revenue and customer experience • Manual processes consume valuable resources • They want to leverage AI beyond the hype I combine technical expertise with a business-oriented mindset to deliver solutions that improve operational efficiency, data quality, and profitability. Areas of expertise: Shopware Development & Architecture E-Commerce Operations Optimization GA4, GTM & Server-Side Tracking AI Workflow Automation Performance Engineering Data Analysis & Reporting Technical Audits Process Optimization I enjoy working with ambitious founders, agency owners, CTOs, and e-commerce teams who value long-term partnerships and measurable business results.

  • Bitcoin
  • Symfony
  • WordPress
  • PHP
  • JavaScript
  • HTML5
  • CSS 3
  • Shopware
  • MySQL Programming
  • Linux
  • Web3
  • Blockchain
  • React
  • Ethers.js
  • MongoDB
Md. Moyen U.

Leverkusen, Germany

$49/hr
4.9
85 jobs

I am an E-Commerce Expert with a passion for providing my clients with modern, clean, and satisfactory services to build up a new E-commerce Platform, Leading a Team, Consulting or developing E-commerce and Web projects. Over the last 12 years, I have been working on PHP/MySQL, Symfony and CMS such as Magento, WordPress/WooCommerce, Shopify, Bigcommerce and Contao. I create custom themes as well as modifying and building plugins/extensions/apps and adding custom modules in PHP and JS. I have excellent experiences in the following. CMS: Magento, WordPress/WooCommerce, Shopify, Big-commerce and Contao. Technology: PHP/MySQL, Symfony, Javascript, ReactJS and Typescript. Tools & Services: PHPStorm, Netbeans, X Debug, Grunt, Docker, AWS, Sequel Pro, Bitbucket, Codeship, Bugsnag, MailChimp, ActiveCampaign, Scrum, JIRA, and Confluence.

  • WordPress
  • Website Redesign
  • PHP
  • Bootstrap
  • Web Development
  • MySQL
  • HTML5
  • CSS 3
  • JavaScript
  • Ecommerce Website Development
  • Magento
  • Theme Customization
  • WooCommerce
  • Web Design
  • WordPress Theme
Andrey S.

Berlin, Germany

$140/hr
5.0
27 jobs

Staff-level backend engineer (16+ years, deep PHP/Symfony) specializing in production AI/LLM integration. Over the last 2+ years I've shipped AI features and built agentic developer workflows: a large self-built MCP (Model Context Protocol) fleet, a code-execution protocol, multi-agent orchestration, and token-cost optimization. Backend depth: high-traffic services, legacy → Symfony DDD rewrites, payment integrations (PayPal, banks, Bitcoin), REST/OpenAPI, MySQL/Postgres/Redis/Elasticsearch, AWS, Docker. I take on selective, senior engagements where backend rigor + modern AI integration make the difference. Available ~15-20 h/week.

  • AI Agent Development
  • Generative AI
  • OpenAI API
  • Claude
  • Prompt Engineering
  • PHP
  • Symfony
  • REST API
  • Git
  • MySQL Programming
  • Linux System Administration
  • Vue.js
  • HTML5
  • CSS 3
David M.

Munich, Germany

$130/hr
4.7
6 jobs

(LinkedIn profile available upon request) Seasoned crypto trader and investor with 12+ years in the cryptocurrency space. Started in 2012 with Bitcoin and developed expertise in spot, leverage, and DEX trading. Professional leverage trader since 2018, proficient across major crypto exchanges and blockchain ecosystems, including Ethereum and Solana. Focused on risk management, market psychology, tokenomics, and advanced trading strategies. As a Crypto Trading Strategist & Portfolio Risk Manager for Institutional & HNW Clients, I manage capital, covering both spot and leveraged positions. Key Skills: Blockchain Technology: DLT, Layer 1/2 Solutions DeFi & Multi-Blockchain Ecosystem Projects (Ethereum, Solana, others) Crypto Exchanges & Multi-Exchange Management (Wallets, Tracking, Security, MEV/Gas Optimization) Trading: Spot, Derivatives, Margin, Lending, DEX Mid-Frequency Trading (MFT) Stablecoins & Tokenomics Fundamental & Technical Analysis Portfolio & Risk Management Additional Skills: On-/Off-Chain Wallet Tracking & Monitoring (Solana/ETH) Automated data collection & bot usage for trend identification Project evaluation & crypto research Market trend analysis & anomaly detection

  • Bitcoin
  • Cryptocurrency
  • Blockchain
  • Trading Strategy
  • Derivatives Trading
  • Research Methods
  • Crypto Asset
  • Risk Management
  • AI Trading
  • Crypto Wallet
  • Crypto Exchange Platform
  • Ethereum
  • Market Analysis
  • Investment Strategy
  • Blockchain Security

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