Hi, my name is John Wehland. I have a computer science degree from Portland State University and have specialized in programming for traders for over a decade. I help clients develop and automate their strategies and indicators across various platforms. I am especially fast and knowledgeable in NinjaTrader’s NT7 and NT8, and Metatrader’s MT4 / MQL4, with many tricks for getting around platform limitations and integrating either of them to various programs via APIs. I regularly work across many programming languages and platforms, including TradingView’s PineScript, TradeStation’s EasyLanguage, ThinkOrSwim’s ThinkScript, C#, Python… and am constantly keeping up my skills with new knowledge. It’s likely that if you have a question about automated trading possibilities, I’ll be able to help find you the answer. I value long term clients and good working relationships. My work is always well documented and organized so other developers can understand it and make further enhancements to it in the future. Two simple example projects I can show, RangeFinder and Vol_Bid_Ask, are in my portfolio and are free to use and/or distribute. Just let me know if you’d like the source code. I have done much more complex projects for many clients, but I do not own any of that code and have signed NDAs with many of them. I have many good references available upon request, for happy clients that I’ve worked with. Just ask. Please let me know how I can help you. -John Wehland

I turn messy data into clear dashboards, visualizations, and tools that teams actually use to make decisions. Most of my work lives where data analysis, visualization, and web development meet. I don't stop at a single chart. I handle the whole pipeline behind it: cleaning the data, figuring out what matters, and delivering it as an interactive dashboard, a clean infographic, or a custom web app. What I do: Data analysis and exploration: EDA, feature engineering, and predictive modeling with Python, Pandas, Scikit-learn, XGBoost, LightGBM Dashboards and BI: interactive, decision-ready dashboards in Power BI, Plotly, and custom web interfaces Data visualization and infographics: well-designed visuals that make complex numbers easy to read (Matplotlib, Seaborn, Plotly) Web applications: full-stack apps and internal tools with Angular and .NET Core AI and RAG systems: custom retrieval-augmented generation pipelines that connect a language model to your own documents and data, so it answers from your knowledge base instead of guessing Algorithmic trading and NinjaTrader 8: automated strategies, custom indicators, and backtesting pipelines for trading clients Why clients work with me: I combine data science, design sense, and full-stack development, so one person can deliver the analysis, the visuals, and the app around them Clean, modular, documented code that stays easy to maintain Clear communication and deadlines I actually meet Specialized Master's-level training in Data Analysis and Machine Learning behind the work Have a dataset, a dashboard idea, or a report that needs to look sharp? Send me a message and I'll tell you honestly what's possible and how I'd approach it.

I am a software engineer specializing in algorithmic trading, fintech applications, AI solutions, and custom software development. Over the past several years, I have successfully delivered 2,000+ projects for traders, fund managers, brokers, startups, and businesses worldwide. My expertise includes: • MetaTrader 4 (MT4) Expert Advisors & Indicators • MetaTrader 5 (MT5) Expert Advisors & Indicators • cTrader (cBots & Indicators) • NinjaTrader Strategies & Indicators • TradingView Pine Script Development • Trade Copiers & Multi-Platform Trading Systems • Broker API Integrations (IBKR, cTrader Open API, TradeLocker, DXtrade and REST APIs) • Risk Management & Trade Management Tools • Trading Dashboards & Analytics Platforms • AI-Powered Applications & Automation • Custom Web & Mobile Application Development Whether you need to automate a trading strategy, build a custom trading platform, create a trade copier, integrate broker APIs, or develop an AI-powered application, I can help transform your idea into a reliable and scalable solution. Why clients choose to work with me: ✓ 2,000+ projects delivered ✓ Deep expertise in algorithmic trading and fintech ✓ Strong full-stack development skills ✓ Clear communication and fast response times ✓ Long-term support and maintenance

Senior Full-Stack .NET Web Developer with 8+ years of experience in C#, ASP.NET Core, .NET 6/8, MVC, Blazor, React, Angular, SQL Server, and Azure. I build enterprise web applications, SaaS platforms, REST APIs, and microservices with 68+ projects delivered on Upwork and consistent 5-star client feedback. CORE EXPERTISE: ✅ Backend Development — C#, ASP.NET Core, .NET 6/8, MVC, Blazor, REST APIs, Microservices architecture ✅ Frontend Development — React, Angular, JavaScript, HTML5, CSS3, Bootstrap (responsive, modern UI) ✅ Database & Data Access — SQL Server, Entity Framework Core, Dapper (query optimization, performance tuning) ✅ Cloud & DevOps — Microsoft Azure, AWS (deployment, hosting, CI/CD, legacy .NET modernization) ✅ AI Integration — OpenAI API, Copilot Studio, Agentic AI (chatbots, automation, AI-powered features inside .NET web applications) ✅ Team Leadership & Client Communication — I lead a development team, so I scale from quick fixes to full product builds, with clear updates at every milestone WHY CLIENTS HIRE ME: Clients endorse me most often as "Committed to Quality" (27x), "Collaborative" (18x), and a "Clear Communicator" (15x). I deliver clean architecture, honest timelines, and software that's maintainable long after launch. Message me with a short description of your project I'll reply within minutes with an honest assessment of scope, timeline, and approach.

Despite robust smart contracts and brilliant backend logic, most Fintech platforms and Web3 dApps ultimately fail to scale due to two structural disconnects: A complex, unintuitive UI that makes the product hard to use, hard to trust, and hard to sell. Unoptimized backend workflows that fail to align with actual user behavior, causing the system to execute contrary to customer expectations. I bridge this gap. I turn fragile, complicated financial software into production-ready business assets. I do not just push pixels or write isolated scripts; I am a Fintech Systems Architect & Fractional CTO. With 6 years of deep experience in financial market infrastructure, I understand exactly what institutional users demand: high-density data visualization, zero-latency execution, and absolute security. I specialize in Project Rescue and Scale-Up Architecture. I act as your hands-on Technical Partner: One single point of contact, absolute transparency, and ZERO hand-holding required. ━━━ 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗 ━━━ • Institutional-Grade SaaS & Dashboards: Converting complex quantitative data (Order Flow, Volume Profile, Slippage metrics) into intuitive, conversion-focused UI/UX dashboards that reduce cognitive load and speed up user onboarding for Prop-Firms and Brokers. • Web3 & Blockchain Ecosystems: Architecting Crypto Exchange interfaces, DEX/AMM dashboards, Smart Contracts UI, and secure Web3 Wallet integrations optimized for high-concurrency and user trust. • Fintech & Payment Infrastructure: Designing scalable SaaS architectures and integrating secure Payment Gateways (Stripe, Crypto) with strict PCI-DSS, AML/KYC, and SOC2-aware compliance. ━━━ 𝗛𝗢𝗪 𝗜 𝗪𝗢𝗥𝗞 ━━━ I am a developer and a finance veteran first. I do not rely on AI to write logic I don't understand. Instead, I leverage specialized AI-assisted workflows to multiply my coding output, eliminate technical debt, and architect for 99.99% uptime. By fusing my financial domain expertise with AI-accelerated full-stack development, I execute complex architectures 3x faster than traditional agencies. You gain the unprecedented speed of AI generation, combined with the strict quality control, security, and performance optimization of a seasoned Architect. From raw data to clean, production-grade financial systems—I treat your capital and your data like my own. Send me your screen, wireframe, or architecture plan. I will tell you exactly what is costing you users or latency, and outline a strategic roadmap to fix it. Let's build something that scales. Keywords: Fractional CTO | Fintech Systems Architect | Enterprise SaaS Architecture | Smart Contract Developer | Blockchain Infrastructure | Web3 Developer | DeFi Protocol | Crypto Trading Engine | Algorithmic Trading Systems | Prop Firm Tech Stack | Payment Gateway Integration | Stripe API | Plaid API | Node.js | Next.js | Python | Solidity | Rust | AI Agentic Workflows | LLM Integration | RAG | High-Concurrency Backend | Microservices Architecture | API Orchestration | UX/UI Architecture | Data Visualization | PCI-DSS | AML/KYC | SOC2 Compliance | Project Rescue | High-Agency Developer

I’m a Senior Excel & Google Sheets Automation Engineer with a strong focus on building reliable, scalable systems for financial analysis, automation, and trading workflows. I help businesses and traders replace fragile spreadsheets and manual processes with robust, production-ready solutions—from advanced Excel and VBA models to Google Sheets automations, API integrations, and trading system development. --- Excel & Google Sheets (Senior Level) - Advanced Excel models (financial forecasts, commissions, dashboards, scenario analysis) - VBA development for automation, reporting, and data processing - Google Sheets Apps Script (custom logic, triggers, integrations, validations) - Clean model architecture: Inputs → Logic → Outputs - High-reliability, audit-safe spreadsheet systems --- Automation & Integrations - Make / n8n workflow automation - API integrations and data pipelines - Automated reporting and data synchronization - Error handling, logging, and maintainable automation design --- Trading Systems Development - TradingView Pine Script (indicators, strategies, alerts) - EasyLanguage (TradeStation indicators & strategies) - NinjaTrader 8 (NT8) strategy and indicator development - Backtesting, optimization, signal logic, and risk rules - Translating trading ideas into structured, executable code --- AI & Image Generation (Selective Use) - AI image generation for marketing and product visuals - Prompt systems for consistent and reusable outputs - AI used as a productivity multiplier—not a black box --- Tools & Technologies - Microsoft Excel (Advanced, VBA) - Google Sheets & Google Apps Script - Make / n8n - TradingView (Pine Script) - NinjaTrader 8 - TradeStation (EasyLanguage) - APIs & data integrations - AI tools (ChatGPT, Gemini) --- I’m best suited for projects where logic, structure, and long-term reliability matter—not quick hacks or manual workarounds. If you’re looking for a senior-level freelancer who can design clean systems that actually hold up in production, I’d be happy to discuss your project.

Need a trading bot or Algo EA developed? I specialize in building reliable trading bots and Expert Advisors (EAs) tailored to your strategies. I bring strong expertise in Python, MQL5, MQL4, cTrader, NinjaTrader n8n, Pine Script, Trading Automation, and Machine Learning. My focus is always on creating high-quality, efficient, and scalable solutions. I work closely with every client to ensure the final product aligns perfectly with their goals and trading style. I am well-versed in the following: • MQL5 • MQL4 • Python • cTrader • IBKR • NinjaTrader • Machine/Deep Learning • Excel I’ll respond to your message as soon as possible. Let me know your requirements and how I can help you! I am looking forward to working with you.

I build advanced Pine Script (v5/v6) indicators, strategies, screeners, alerts, webhooks, and automated trading systems for TradingView, as well as Expert Advisors and custom indicators for MT4/MT5. I specialize in complex projects: multi timeframe logic, custom backtesting and strategy testers, non standard visualizations, machine learning based indicators, and seamless conversion between TradingView (Pine Script) and MetaTrader (MQL4/MQL5). Here's what I can help you build: - Custom Pine Script indicators and strategies (v5/v6) - TradingView to MT4/MT5 conversions (and the other way around) - Backtesting and strategy tester tools - Real time market scanners and dashboards - Automated alerts, webhooks, and signal based execution - Telegram signal copier bots - Risk management logic like SL/TP, trailing stops, break even, and partial exits - Machine learning based indicators and strategies - Expert Advisors (EAs) for MT4/MT5 - Indicators and strategies for NinjaTrader, ATAS, ThinkOrSwim, cTrader, and Quantower With 7+ years of experience in trading software development, I focus on code that doesn't just compile, it performs reliably under real market conditions. My best fit is clients who need more than a basic indicator. If you're looking for complex logic, clean architecture, reliable automation, or a trading system that needs to be built properly from the ground up, that's exactly where I shine.

(𝗘𝗾𝘂𝗶𝘁𝗶𝗲𝘀, 𝗢𝗽𝘁𝗶𝗼𝗻𝘀, 𝗙𝘂𝘁𝘂𝗿𝗲𝘀, 𝗖𝗿𝘆𝗽𝘁𝗼,𝗙𝗼𝗿𝗲𝘅, 𝗦𝘁𝗼𝗰𝗸𝘀) 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: (Alpaca, Interactive Brokers, Thinkorswim, QuantConnect, NinjaTrader, MT4/5, Binance,Bybit, Blufin, Quantower) or Custom Backtesting Engines, CFD development, Custom Trading Systems or Trading Infra. 𝗕𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱: Senior Software Engineer and Algo trader designing institutional-grade, execution-ready trading systems for hedge funds, proprietary trading desks, and advanced fintech teams. ✅ Over $1.5 million under mangement. ✅ 70k+ Traders community. ✅ 20+ happy clients. I specialize in turning robust alpha hypotheses into live, low-latency trading engines with proper risk, monitoring, and fail-safes built in from day one. From high-frequency execution to liquidity-providing market-making, I build systems that are latency-aware, resilient under stress, and designed for real capital, not just attractive backtests. 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱 Trading bots integration with with brokerage accounts, creating dashboards for them, deploying them into the cloud, and related financial automation jobs to include copy-trading, back-testing, alerts, TradingView webhooks, order forms, order routing scripts, sentiment analysis (like on r/WallStreetBets), scanners/screeners, as well as web scrapers Statistical arbitrage and market-making strategies: spread modeling, co-integration, pairs and baskets, inventory and quote-risk controls, and continuous PnL/risk monitoring. Trading aggregators and smart order routing: multi-exchange connectivity, routing logic, internal crossing, venue selection, slippage control, and real-time risk/hard-limits. ML and LLM-augmented research pipelines: feature engineering for non-stationary series, signal stability testing, reinforcement-learning style policy evaluation, and sentiment/NLP inputs where they add real edge. Crypto and DeFi execution: CEX/DEX arbitrage, AMM routing, perpetual swaps, and integrations across on-chain protocols and off-chain venues. Low-latency & backend: C++, C#, Rust, Python, with practical experience building production trading and automation tools and server-side components. 𝗧𝗵𝗲 𝗲𝗻𝗱 𝗴𝗼𝗮𝗹 𝗶𝘀 𝗮𝗹𝘄𝗮𝘆𝘀 𝘁𝗵𝗲 𝘀𝗮𝗺𝗲: 𝗲𝘅𝗲𝗰𝘂𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 𝘁𝗵𝗮𝘁 𝗰𝗮𝗻 𝗯𝗲 𝗱𝗲𝗽𝗹𝗼𝘆𝗲𝗱, 𝗺𝗼𝗻𝗶𝘁𝗼𝗿𝗲𝗱, 𝗮𝗻𝗱 𝗶𝘁𝗲𝗿𝗮𝘁𝗲𝗱 𝗶𝗻 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻, 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗶𝗺𝗽𝗿𝗲𝘀𝘀𝗶𝘃𝗲 𝗯𝗮𝗰𝗸𝘁𝗲𝘀𝘁 𝗰𝗵𝗮𝗿𝘁𝘀. 𝗕𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗼𝗿 𝘂𝗽𝗴𝗿𝗮𝗱𝗶𝗻𝗴 𝗮 𝘁𝗿𝗮𝗱𝗶𝗻𝗴 𝘀𝘁𝗮𝗰𝗸? 𝗦𝗵𝗮𝗿𝗲 𝘆𝗼𝘂𝗿 𝘀𝗲𝘁𝘂𝗽, 𝘃𝗲𝗻𝘂𝗲𝘀, 𝗮𝗻𝗱 𝗰𝗼𝗻𝘀𝘁𝗿𝗮𝗶𝗻𝘁𝘀, 𝗮𝗻𝗱 𝘄𝗲 𝗰𝗮𝗻 𝗺𝗮𝗽 𝗼𝘂𝘁 𝗮 𝗰𝗼𝗻𝗰𝗿𝗲𝘁𝗲 𝗽𝗹𝗮𝗻.

I build automated trading systems that run live with real capital: MT4/MT5 Expert Advisors (MQL4/MQL5), TradingView Pine Script indicators & strategies, and Python trading bots for Forex, Crypto, Gold, and prop firm traders. 29 projects delivered on Upwork with a 90% Job Success Score. Most clients don't need another script. They need a developer who understands trading logic, risk, and execution as deeply as the code itself. That's where I come in - every system I ship is backtested, forward-tested, and built to survive live markets, not just produce green backtests. 🔹 What I can build for you ✅ MT4/MT5 Expert Advisors (MQL4/MQL5) - full execution bots, prop-firm-compliant EAs (FTMO-style drawdown rules), risk & money management, news/session filters ✅ Pine Script (TradingView) - custom indicators, strategies, alerts, multi-timeframe logic, non-repainting scripts, backtesting ✅ Python Trading Automation - async bots, REST/WebSocket API integration (Binance, Bybit, OANDA, Deriv, MT5), data pipelines ✅ TradingView Webhook Automation - TradingView → MT5/broker execution bridges, Telegram signal copiers, copy-trading systems ✅ NinjaTrader 8 - strategies and indicators in NinjaScript (C#), order flow and breakout systems ✅ Strategy Development & Backtesting - turning your idea into a measurable, optimized algorithmic trading system ✅ Exchange & Broker API Integrations - TradingView webhooks, exchange APIs, broker connectors, custom REST/WebSocket setups 🔹 Why clients hire me (and come back) ✔ I think in edge, risk, and execution - not just syntax ✔ Clean, well-documented, maintainable code (no spaghetti) ✔ Honest feedback - if your strategy has a flaw, I'll flag it before we build ✔ Built for live markets, not just green backtests 🔹 Recent work • Automated Polymarket trading bot (Python) for prediction-market market-making • Prop-firm-compliant MT5 Expert Advisor with multi-layer risk management • Multi-timeframe Pine Script strategies with webhook execution to MT5 • Telegram-to-MT5 signal copier handling live signals end to end 🔹 Tech stack Pine Script v5/v6 · MQL5 · MQL4 · MetaTrader 4/5 · Python (asyncio) · NinjaScript (C#) · REST & WebSocket APIs · TradingView Webhooks · Telegram Bot API · Binance · Bybit · OANDA · Deriv · PineConnector If you're serious about automating your edge and want a developer who treats your system like real capital is on the line - send me a message with your strategy or idea, and let's build something that performs.