Hire the Best C# Developers & Programmers
in Canada

Clients rate our C# developers & Programmers
Rating is 4.9 out of 5.
4.9/5
Based on 158 client reviews
Pete P.

Longueuil, Canada

$90/hr
5.0
39 jobs

Python Trading Infrastructure Engineer | Exchange Connectivity | Backtesting | Live Execution | GMT+7 I build the infrastructure that makes trading strategies actually work in production: exchange connectors, real-time data pipelines, backtesting engines, and live execution systems. My background is in trading systems engineering, not strategy development. I don't generate alpha, I validate it and build the systems that execute it reliably, fast, and correctly. If you have a strategy that needs to be automated, backtested properly, or connected to a live exchange, that's what I do. ▶ TECHNICAL EXPERTISE ◀ • Exchange connectivity: Binance, ByBit, Coinbase, OKX, Bitget, Interactive Brokers (IBKR TWS) • Trading frameworks: Hummingbot (top-10 OSS contributor) | NautilusTrader | QuantConnect • CEX and DEX connectivity | WebSocket market data | REST order management • Backtesting engines: correctness, performance optimization, realistic fill simulation • Prediction markets: Kalshi, Polymarket • Languages: Python, Cython, C++ • Low-latency optimization: asyncio profiling, network tuning, thread isolation • Strategy types supported: arbitrage, market-making, trend-following, mean-reversion, grid bots • Data: NumPy, Pandas, Dask, Parquet, PostgreSQL ▶️ WHY CHOOSE ME ◀️ 8+ years building trading systems professionally, including 2 years at CoinAlpha (Hummingbot, top-10 OSS contributor), ongoing freelance work across crypto, equities, and prediction markets. Georgia Tech M.S. Computer Science, 3.8 GPA. Top Rated on Upwork, 5-star rating. Keywords : Hummingbot, Nautilus Trader, NautilusTrader, Backtesting, Optimization, Latency, Quant, Interactive Brokers, IB, IBKR, TWS, Lean, Quantconnect, Quant Connect, QuantConnect, Trader, Indicator, ForEx programmer, code an Indicator, Python, C++, Cython, Automated Strategy, Quant Dev, Historical Data, Strategy Analysis, Performance Analysis

  • C++
  • SciPy
  • Python
  • Python Scikit-Learn
  • Mathematical Optimization
  • Algorithm Development
  • API Integration
  • Quantitative Finance
  • Trading Automation
  • TensorFlow
  • Cryptocurrency Trading
  • Crypto Exchange Platform
  • Low-Level Programming
  • Data Analytics
  • Software Development
  • GUI Design
  • Business with 10-99 Employees
Jonathan D.

Riviere-du-Loup, Canada

$85/hr
4.7
59 jobs

I've spent 25+ years building custom production systems, over $500K worth and more than 20 of those in .NET, and these days I'm focused on AI. I build LLM and RAG pipelines, AI agents, and document-intelligence workflows in Python and .NET, usually for businesses whose operations are too unique for off-the-shelf software to fit. The messy, niche, one-off projects most people won't touch are the ones I enjoy most. I automate the manual work that's eating your time and only bring in AI where it genuinely adds value. Hire me when you need something actually built, not just wired together out of existing tools. When the requirements are one of a kind and the domain is a real tangle, I work out the architecture, learn whatever the problem needs, and ship a production system from scratch. That's a big part of why clients stick with me: one for 13 years, another for 4, and a lot of them started with a single project and just kept coming back. "I have yet to give him a hurdle he can't clear." — Scot Nichols, Automotive Diag (2-year client) WHY BUSINESSES CHOOSE ME I don't just build what's on the ticket. I want the actual problem first. Before I write any code I dig into how your business runs: does AI really help here, or would something simpler be more reliable? How will it scale? What will the ongoing model and compute costs look like? Good software, AI or not, has to fit how your business actually works, not whatever's trendy this quarter. I spot the issues you might not see yet — runaway LLM costs, latency under load, multi-user concurrency, awkward integrations — and head them off before they get expensive. I've also helped clients set subscription pricing and cut cloud bills. And I build to last: Clean Architecture, real test coverage, monitoring, and documentation. WHAT SETS ME APART I work across the whole AI and software stack and more than one ecosystem: • AI & LLM engineering — OpenAI, Azure OpenAI, Anthropic/Claude APIs, RAG pipelines (vector + BM25 hybrid, reranking), pgvector, prompt engineering, model selection and benchmarking • AI agents & automation — Microsoft Foundry (Agent Service, Agent Framework), multi-agent orchestration, custom tools via Azure Functions / OpenAPI / Logic Apps / MCP, knowledge-grounded agents over SharePoint / OneLake / Blob, human-in-the-loop approval gates, A2A federation — published into Microsoft Teams and 365 Copilot • Document intelligence — Azure Document Intelligence (prebuilt + custom neural/template models for invoices, receipts, IDs, contracts), Azure AI Search knowledge mining, confidence-scored extraction with human-review routing, PII detection/redaction • Enterprise .NET — ASP.NET Core, Entity Framework, WPF, Clean Architecture • Python data engineering — FastAPI, pandas, Apache Airflow, async processing • Multi-cloud & real-time — Azure, GCP, AWS with Terraform; file monitoring, API integrations, automated workflows When I do use AI, I back it with real numbers, not guesswork — recall@k, MRR, and LLM-as-judge scoring for faithfulness and relevance. For agents that means real guardrails: per-agent identity and RBAC (Microsoft Entra ID), least-privilege tool access, prompt-injection mitigation, approval gates on anything business-critical, and monitoring of citation rates, retrieval accuracy, and token cost. If a plain, non-AI solution is more reliable or cheaper, I'll tell you up front. PORTFOLIO HIGHLIGHTS RAG Pipeline (Security Compliance) — End-to-end RAG over NIST security publications (SP 800-53 Rev 5 + AI RMF). Hybrid retrieval (vector + BM25) with a cross-encoder reranker, measured on a hand-labeled 95-question eval set: recall@5 0.63 → 0.83, MRR 0.48 → 0.64, holding at 10,000-chunk scale. Inline citations, grounded "I don't know", prompt-injection guardrails. Tech: Python, FastAPI, Azure Container Apps, Azure OpenAI, pgvector, Langfuse, CI/CD Automotive Documentation Platform — Multi-tenant system that automated a fully manual Google Sheets process. Syncs PDFs/images from field devices, organizes jobs, generates branded reports, and reconciles with QuickBooks invoices, eliminating missed billing. Built as a multi-tenant Azure SaaS. Tech: ASP.NET Core, Azure, QuickBooks API, OCR / PDF extraction Climate Data Integration Pipeline — One-off platform integrating 120+ government data sources, with scheduling, error handling, and monitoring. No template ETL tool could handle the source variation. Tech: Python, GCP, Apache Airflow, PostGIS Real-Time File Monitoring System — Event-driven Azure platform processing 100,000+ files. Self-healing recovery, parallel processing, sub-second latency. Tech: .NET 9, Azure Cosmos DB, Docker, Azure Functions LET'S TALK Top Rated Plus | 100% Job Success Score | $500K+ Delivered | 10+ Years on Upwork Send me your project details and I'll usually get back within a day, with real questions and a first take on how I'd approach it.

  • C#
  • Solution Architecture
  • REST API
  • AI Development
  • Database Design
  • Entity Framework
  • Clean Architecture
  • .NET Core
  • ASP.NET Core
  • Azure App Service
  • Microsoft SQL Server
  • Azure Cosmos DB
  • Blazor
  • JavaScript
  • Windows App Development
Kyle C.

Gander Bay North, Canada

$50/hr
5.0
8 jobs

Gameplay Systems Engineer specializing in Unreal Engine C++ gameplay development and Unity C# programming. I build scalable gameplay systems, multiplayer features, AI behaviors, and modular game architecture. I work best on projects where strong engineering structure matters — designing systems that are modular, maintainable, and built to scale as a game grows. My work often sits at the intersection of gameplay, networking, and technical design, helping teams move from prototype systems to scalable production gameplay architecture. Recently I’ve been working on multiplayer gameplay architecture in Unreal Engine, building subsystem-driven gameplay frameworks, AI systems, and progression systems designed for multiple game modes and long-term expansion. I collaborate closely with designers, artists, and producers to turn ideas into stable, performant gameplay features that feel great to play. What I Can Help With: Unreal Engine: - Gameplay systems (C++) - Multiplayer architecture & replication - Game modes, GameState / PlayerState systems - AI systems (Behavior Trees, State Trees, perception) - Subsystem architecture & modular gameplay frameworks - Performance optimization Unity: - Gameplay programming (C#) - Mobile game development - UI systems - Addressables & asset pipelines - Performance optimization General Game Engineering: - Game prototypes - Gameplay mechanics implementation - System architecture & refactoring - Debugging and performance tuning - Technical design support How I Work: - Clear communication and fast iteration - Strong engineering foundations - Clean, maintainable systems Services: - Unreal Engine gameplay programming - Unreal Engine C++ development - Multiplayer gameplay systems - Unity gameplay programming - Game mechanics implementation - AI behavior systems If you need a developer who can design and implement robust gameplay systems, I’d be happy to discuss your project.

  • C#
  • Unreal Engine
  • C++
  • Unity
  • Game Development
  • Game Mechanics
  • Game Engine
  • Game Framework
  • Game Prototype
  • Game Customization
  • Game Development Bug Fix
  • Game Consultation
  • Game Design
  • Game Testing
  • Video Game
Vasu B.

Winnipeg, Canada

$21/hr
5.0
1 jobs

I specialize in data-driven software development with a focus on analytics systems and simulations. With three years of educational experience, I've collaborated on diverse projects, including designing a comprehensive SQL database for Formula 1 performance analytics covering over 692K records and creating a Java application for real-time queries. I also developed an event-driven airport runway simulator in C++, mastering the intricacies of scheduling and data management. My strong technical skills in Java, C++, and SQL, combined with my hands-on project experience, enable me to deliver efficient, high-quality solutions that enhance functionality and user experience. If you need a detail-oriented programmer who excels at transforming complex data into actionable insights, let's discuss how I can contribute to your projects.

  • Web Application
  • Web Development
  • Software Development
  • Desktop Application
  • Agile Software Development
  • CI/CD
  • Data Structures
  • Logical Data Solutions Manifest
  • Communications
Oyeyemi A.

Sydney, Canada

$15/hr
5.0
5 jobs

I build high-converting websites for businesses that are serious about growth. As a WordPress expert with a marketer's mindset, I don't just design pages—I Architect strategic digital assets that attract leads and close sales. The Problem & Your Solution (The "How"): Most business websites are beautiful cost centers. I build yours as a profit-generating engine. With 4+ years of full-stack development and a background in marketing, I bridge the gap between aesthetics and analytics. Every design decision—from layout to button color—is informed by conversion psychology and technical performance. Proof & Specificity (The "What"): I specialize in creating websites that deliver measurable results: · For E-commerce: Streamlined funnels that reduce cart abandonment · For Service Businesses: Lead-generation machines that book more consultations · For Startups: Scalable foundations that support rapid growth Recent results include: A car dealership site that increased quote requests by 30% and a cosmetic store that boosted mobile conversions by 25%. Technical Execution & Process: ⚙️ My Development Stack: · Primary Platforms: WordPress (Elementor/Divi) & Webflow · Core Technologies: JavaScript, React, Python · Design & Strategy: Figma, Adobe Suite, Conversion-Focused Wireframing 🚀 What I Deliver: · Speed-optimized, mobile-perfect business websites · SEO-optimized landing pages & sales funnels · Seamless platform migrations & redesigns · Ongoing maintenance with performance monitoring Why Choose Me: Beyond Code: The Marketing Mindset Advantage ✅ I speak business, not just tech – I understand your website needs to ROI ✅ Proven track record of delivering ahead of schedule ✅ Clear communication with weekly progress updates ✅ Strategic partner focused on your business objectives, not just project completion I'm currently accepting 1-2 new projects for Canadian businesses looking to transform their online presence into their strongest sales channel. Let's discuss how your website can generate more leads, i will: 1.⁠ ⁠Provide a free, specific suggestion to improve your current site's conversion rate 2.⁠ ⁠Share a relevant case study from your industry 3.⁠ ⁠Outline a clear project timeline and investment Let's build a website that doesn't just look good—it performs better. Keywords To Find Me WordPress developer | WordPress expert | WordPress website | WordPress design | WordPress development | custom WordPress | WordPress customization | WordPress specialist | WordPress consultant | WordPress programmer | WordPress engineer | WordPress freelancer | WordPress pro | WordPress website builder | WordPress website designer | WordPress website developer | WordPress website creation | WordPress website development | WordPress website design | WordPress web developer | WordPress web designer | WordPress web design | WordPress web development | custom website design | custom website development | custom web design | custom web development | website design | website development | web design | web development | website designer | website developer | web designer | web developer | website builder | website creator | website maker | responsive web design | mobile responsive design | mobile-first design | mobile-friendly website | responsive website | responsive design | full-stack developer | front-end developer | back-end developer | HTML developer | CSS developer | JavaScript developer | PHP developer | PHP WordPress | WordPress PHP | WordPress HTML | WordPress CSS | WordPress JavaScript | WordPress jQuery | WordPress Bootstrap | WordPress Tailwind | WordPress REST API | WordPress API integration | headless WordPress | WordPress multisite | WordPress multisite developer | WordPress network | WordPress theme developer | WordPress theme customization | WordPress theme design | custom WordPress theme | WordPress child theme | WordPress page builder | WordPress block editor | WordPress Gutenberg | Gutenberg developer | Gutenberg blocks | custom Gutenberg blocks | custom blocks development | WordPress plugin developer | WordPress plugin development | custom plugin development | WordPress plugin integration | WordPress plugin configuration | WordPress plugin setup | WordPress troubleshooting | WordPress bug fix | WordPress error fix | WordPress support | WordPress maintenance | WordPress update | WordPress migration | site migration | WordPress transfer | Wix to WordPress | Squarespace to WordPress | Webflow to WordPress | Shopify to WordPress | CMS migration | platform migration | website migration | WordPress hosting setup | WordPress server setup | WP Engine setup | Flywheel setup | SiteGround WordPress | Kinsta WordPress | Cloudflare WordPress | Namecheap WordPress | GoDaddy WordPress | WordPress install | WordPress setup | WordPress configuration | WordPress optimization | WordPress performance | WordPress speed optimization | Core Web Vitals optimization | Google PageSpeed optimization | WordPress caching | WP Rocket

  • Web Design
  • WordPress Website
  • Conversion Rate Optimization
  • WordPress Landing Page
  • Landing Page Design
  • WordPress Malware Removal
  • On-Page SEO
  • Responsive Design
  • Online Store Customization
  • Local SEO
  • Landing Page Optimization
  • Website Optimization
  • Figma
  • No-Code Landing Page
  • Website Audit
  • WordPress Website Design
  • WordPress Security
  • WordPress
  • WordPress Bug Fix
  • WordPress Customization
Noor M.

Calgary, Canada

$50/hr
4.2
74 jobs

Hi, I am a Cyber Security Expert and Information Technology professional with 18 years of experience in Cyber Security, Information Technology, Website Design & Development, and Graphic Design. I hold an MS in Cyber Security from Scotland, UK, and an MSc in Information Technology. I am a CISM (Certified Information Security Manager) certified by ISACA, USA. I have strong expertise in managing Cyber Security and Information Security standards. I develop policies and procedures in accordance with the latest cyber security standards. I provide services for ISO/IEC 27001 ISMS and the NIST Cybersecurity Framework. I specialize in Vulnerability Assessment and Penetration Testing (VAPT). I conduct authorized website security scanning with owner consent. I prepare detailed penetration testing reports based on CVSS. I advise clients on vulnerability mitigation and risk reduction. I am available for Cyber Security Consultancy Services. Team Members: My wife, an MSc in Computer Science graduate, is an expert Website Designer and Developer. She also specializes in MS Word, Excel, PowerPoint, content writing, and creates training videos for HTML, C, C++, Python, and more. My brother is an experienced Network Support Engineer with expertise in LAN, VLAN, routing protocols, switching, and Linux. Yours sincerely, Noor Mustafa Awan Calgary, Alberta, Canada

  • Information Security
  • Cybersecurity Management
  • AT&T Cybersecurity
  • Information Security Consultation
  • GDPR
  • Information Security Audit
  • NIST SP 800-53
  • Information Security Awareness
  • ISO 27001
  • AWS Systems Manager
  • Technical Writing

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