Hire the Best C# Developers & Programmers
in the United Kingdom

Clients rate our C# developers & Programmers
Rating is 4.8 out of 5.
4.8/5
Based on 233 client reviews
Adam H.

Oxford, United Kingdom

$120/hr
5.0
20 jobs

Former Fund Manager ($880mio AUM) | Trading Strategies | Programming | EAs and Indicators | Consultancy | Research | Stock trading | FX(Forex) Trading | Futures Trading | Crypto | Investment management For nearly 30 years I have been studying financial markets, trading, and developing and testing trading strategies for all markets including FX, crypto, stocks, options, and futures. I use my trading experience to help other traders develop and test their trading ideas. For 10 years I was a fund manager with at peak $880mio aum. My past and current clients include fund managers, professional traders, investment advisors and portfolio managers. I also work with private traders who are just getting started. I am focused on the following services: - Consulting on the creation and management of trading strategies in the stock markets, options, futures, crypto and FX (Forex), which are profitable. - Creation of scripts of indicators and strategies for TradeStation / Multicharts / Metatrader 4 & 5 - Trading coaching - options, stocks, futures, FX(forex), crypto - Trading psychology coaching - finding and clearing the blocks and limitations that are holding back your trading By choosing to work with me, you can count on a high level of professionalism, many years of experience, dedication and also enthusiasm for the project we do together.

  • EasyLanguage
  • MetaTrader 4
  • MetaTrader 5
  • TradeStation
  • Investment Strategy
  • Investment Research
  • Forex Trading
  • Technical Analysis
  • Quantitative Analysis
  • Trading Strategy
  • Financial Trading
  • Derivatives Trading
  • C++
  • Python
Jason F.

London, United Kingdom

$90/hr
5.0
58 jobs

🔸 Top 1% in Upwork. 🔸 100% Job Success. 🔸 4,000+ hours. 🔸25+ years experience. I deliver high-quality, engineered software that is robust, works at scale, and can grow as fast as your business grows. ❝ High-quality software is not complicated - it just requires discipline and steadfast attention to detail on each step of the journey. ❞ What's stopping you from starting your journey to software excellence and fixing your business' pains? You can arrange a call with me to discuss your project needs for free in a 30-minute consultation call! Hi. I'm Jason - an experienced (25+ years) software architect and engineering professional involved in all parts of the SDLC (Waterfall, Agile and Hybrid methodologies). With a wealth of experience across industries such as commercial aviation, banking (real-time payments processing & FX), 24/7/365 manufacturing lines, e-commerce, and public transport (smart card), I will bring a passion for delivering elegant and reliable solutions to your project. I will work with you (and your team) to provide the best possible technical solution to your business problem. No matter the business domain or challenges you are facing, l have deep technical and architectural knowledge, as well as excellent communication skills, to help solve your business problem with the right software solution. I will bring to bear a highly focused set of technical and people skills to help your project succeed. The recommendations and advice I provide focus on minimizing risks and maximizing your project's chances of success. This is what my 25+ years of experience bring you: honest, robust, and intelligent solutions to see you succeed. When asked to build software, I deliver high-quality server-side C# .NET software solutions that give what you need: Software engineered to be robust, scalable, and designed to exceed your business expectations. What you'll get when you choose me to work with you: ⭐️ Clear, effective communication ⭐️ Precise, quality recommendations to ensure success for your project ⭐️ A focused, collaborative approach to work with you and your team ⭐️ A no-nonsense, results-focused approach that delivers value to your project For example, this are what a couple of my clients had to say: ❝Jason is by far the best architect I have ever worked with. He displays extreme ownership of his work and it's incredibly refined. Every deliverable was on time or ahead of time. Not only did Jason provide an incredibly performant and scalable architecture, the documentation he provided was top notch. I will forever keep Jason and my goto for any and all technical and solution architectural needs.❞ Cade - VP Engineering - US Software Company ❝Jason helped get our team on our feet for doing proper documentation and much more, actually. He helped improve the engagement of our team members and how they work together. If we can, we will surely ask for his help again in the future. I can only give high praise of Jason's quality of work. We highly recommended for documentation and general architectural design work.❞ Alexander L - Acting CTO - Global On Media If you are interested in working together, please invite me to your job on Upwork. I look forward to hearing from you soon and helping you deliver on your software vision. Regards, Jason. A highlight of my technical specialties I can help you with: ✅ .NET Technical and Solution architecture consultancy and design ✅ C#.NET ✅ Team leading, technical .NET mentoring, and coaching ✅ High availability solution designs (24/7/365) ✅ Event-driven architectures (including actor-based systems) ✅ Highly concurrent software design (thread-safe) ✅ High volume, low latency software designs ✅ Cloud (MS Azure and AWS) solutions ✅ Hybrid (on-premise and Cloud) solutions ✅ Microservices ✅ Message brokers and ESB ✅ SOLID, DDD, OOP, and TDD ✅ Experienced in Agile and Hybrid delivery models ✅ Container (Docker) deployments software using CI/CD (Azure Devops) ✅ Dependency Injection (DI using Autofac, DryIoc) A highlight of the software products I'm experienced with: ✅ Sparx Enterprise Architect ✅ JetBrains Rider IDE ✅ Confluence, JIRA ✅ Git ✅ Resharper, DotMemory, DotTrace ✅ VMWare (Fusion) ✅ Visual Studio 2019 IDE Other clients had this to say about my work with them: ❝Jason was a tremendous professional, outstanding architectural skills and understanding both technical and business requirements.❞ Brian V - COO - LaunchControl

  • C#
  • Akka.NET
  • Solution Architecture
  • Solution Architecture Consultation
  • Software Consultation
  • Enterprise Software Development
  • TOGAF
  • Enterprise Architecture
  • Software Architecture & Design
  • Cloud Computing
  • .NET Core
  • Microservice
  • Multithreaded Programming
  • API Development
  • Requirements Specification
Richard G.

Hereford, United Kingdom

$100/hr
5.0
9 jobs

New system build and legacy app modernisation & updating done right After working for more than 25 years in the Software industry, including many projects for public sector clients such as the NHS, National Strategy for Police Information Services and Ambulance & fire services, I have seen the good, the bad and the ugly of large and small scale projects. I've worked with all major technologies and stacks over my career, including Microsoft .NET / .NET Core, Azure, Node / JS etc as well as mobile development with Xamarin / React, and my experience means I'm always able to hit the ground running and add value quickly As well as undertaking new (Greenfield) development, I'm also happy taking Brownfield existing code and systems and updating them to newer technologies and architecture, while ensuring as much of the existing code is reused as possible to keep down costs and maintain confidence in the existing business rules, or adding new features to existing systems. I've also provided new mobile apps to existing legacy systems on both iOS and Android

  • C#
  • .NET Framework
  • Azure DevOps
  • SQL
  • Enterprise Architecture
  • .NET Core
  • Cross Functional Team Leadership
  • Agile Software Development
  • Microsoft Azure
Siddharth G.

Leicester, United Kingdom

$25/hr
5.0
4 jobs

I am a Senior Full Stack Developer specializing in the analysis, design, and delivery of scalable, high-performance software. With a deep foundation in Object-Oriented Programming (OOP), system design, and cutting-edge artificial intelligence, I bridge the gap between complex backend logic, cloud-native infrastructure, and intuitive frontend experiences. Core Expertise - AI & Intelligent Systems: Hands-on experience in LLM development, fine-tuning, and embedding vector-based search workflows to build context-aware systems. Expert in architecting autonomous AI Agents capable of tool use, multi-step reasoning, and seamless integration into enterprise backend pipelines. - AI-Driven Development: Proactive in leveraging advanced AI tools and LLM pair-programming methodologies to accelerate the entire software development lifecycle, automate repetitive tasks, and optimize code quality. - Microservices & Architecture: Expert in decomposing complex monoliths into resilient, event-driven Microservices and implementing Micro Frontend architectures to enable decoupled scaling and independent deployment cycles. - Backend Engineering: High proficiency in building robust, low-latency APIs and distributed systems using Node.js, Python, C#, and C++. - Frontend Excellence: Extensive experience in designing responsive, modular UIs with React, Angular, and VanillaJS, focusing on layout precision and fluid user experiences. - Cloud & DevOps: Proven track record in cloud-native development across both AWS and Azure ecosystems, leveraging container orchestration, serverless functions, and CI/CD pipelines to automate infrastructure delivery. - Quality & Practices: Passionate advocate for Test-Driven Development (TDD), clean code principles, and the strategic application of Design Patterns to ensure highly maintainable, stable codebases.

  • AI Development
  • Web Development
  • iOS Development
  • Android App Development
  • Node.js
  • TypeScript
  • React
  • Next.js
  • React Native
  • AWS Development
  • Microsoft Azure
  • Docker
  • Kubernetes
  • Python
  • AI Agent Development
  • Shipping & Order Fulfillment Software
  • Voice Recording
  • VoIP Software
Lewis W.

Dundee, United Kingdom

$30/hr
4.8
17 jobs

Unity Developer | 10+ Years Building Games & Interactive Tools I've spent the last decade deep in Unity development, working on everything from mobile games to complex 3D design software. Most recently, I led a team for 5 years building VanSpace 3D, a sophisticated interior design tool for van conversions. Before that, I worked on VanLife Makeover, a mobile puzzle game about renovating campervans. I'm comfortable across the full stack. Gameplay systems, UI/UX, multiplayer with Mirror and Netcode, backend APIs, and even the modelling side when a project needs it. I've built VR prototypes, procedural generation systems, and plenty of rapid prototypes to help clients test ideas before committing to full development. What I bring: Rapid prototyping to validate concepts quickly. I can take projects from initial concept through to shipped product, and I'm experienced leading technical development while collaborating with teams. WebGL builds are a specialty for browser-based demos and tools. I write clean, maintainable code that other developers can work with. How I work: I'm direct about timelines and budgets. I've worked with clients who needed a quick proof-of-concept and others building full production pipelines. Communication stays clear throughout. Most of my recent work has been long-term client relationships where I'm part of the team rather than a one-off contractor. If that matches what you're looking for, let's talk about your project!

  • C#
  • Ages 7+
  • Ages 16+
  • Game Design
  • Game Development
  • Ages 3+
  • Ages 12+
  • In-App Purchases
  • PC Game
  • Android
  • Level Design
  • iOS
  • Ages 18+
  • Unity
Thomas B.

Portsmouth, United Kingdom

$37/hr
5.0
28 jobs

As an Experienced Senior Unity Developer, I excel in C# Programming, Game mechanics, Multiplayer. Very Proficient in Mobile Optimization and PC games. I also have a lot of experience with Java. Thank you for visiting my profile! I'm a game programmer specialising in Unity C# - I have strong programming knowledge in C# with Unity. - Unity ECS / DOTS / Burst - PC and Mobile games - Multiplayer games - I have strong programming knowledge of Java. - Experienced with IAP, Virtual Currency, Unity ads and Admob - Experienced with Firebase - Experienced Unity Developer - Experienced Networking Full Stack Developer (Server / Client) developer - Experience with Amazon AWS - Experience with SFS - Database experience with: Dynamo, MySQL If you need any more information feel free to message me.

  • C#
  • Game Development
  • Unity
  • Mobile Game Development
  • Java
  • PC Game
  • In-Game Advertising
  • In-App Purchases
  • Online Multiplayer

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