Hire the Best C# Developers & Programmers
in Poland

Clients rate our C# developers & Programmers
Rating is 4.8 out of 5.
4.8/5
Based on 109 client reviews
Andrei M.

Warsaw, Poland

$45/hr
5.0
29 jobs

✅ .NET Full Stack Developer 20+ years of experience ✅ Build powerful .Net solutions that drive business growth ✅ C# .Net developer with 15+ years of experience ✅ Developed 50+ applications ✅ Crafted 200+ user-friendly interfaces that drive real business results. The clients say "It doesn't feel like outsourcing, but instead like we have our own remote developers." "They had great soft and hard skills and were full of ideas and drive!" I lead the fullstack and mobile development team at Itexus, a professional software development and consulting company focused on Fintech, Insurance, Healthcare, etc. I have 20+ years of experience in the .net architect development of web and mobile applications, .net, python, node.js, java developer as well as javascript, react .net, angular, AI frameworks and libraries. 👨‍💻.NET Full Stack Expertise .NET full stack – strong background in End-to-end development from database to UI using Microsoft stack .NET Core – deep expertise, cross-platform backend services .NET Angular – Full stack development on .NET backend and Angular frontend for enterprise-grade solutions .net core angular – Building complete systems with seamless backend–frontend integration .NET Core Angular – Scalable and secure web apps using .NET Core and Angular Angular .NET solutions – Using Angular for UI and .NET for API and business logic .net core developer – Proven experience delivering high-performance backend solutions using .NET Core .net core react – Building robust, scalable web applications with .NET Core APIs and React frontends c# .net developer – End-to-end development expertise using C# and the .NET ecosystem c# .net core – Advanced solutions built on C# with .NET Core for modern, cross-platform applications 👨‍💻 BACKEND Development Python: Expert in Python for server-side development Frameworks: Proficient in Django and Flask for building web applications Databases: Skilled in SQL, PostgreSQL, MySQL, and MongoDB for efficient data management Architecture: Experienced in applying MVC patterns for scalable applications APIs: Capable of integrating external services through REST and GraphQL 👨‍💻 FRONT END Development Proficient in HTML5, CSS responsive, JavaScript Experienced in React.js, Angular, Vue.js, react native, ionic, xamarin developer Responsive, cross-browser, ui/ux designer, ux/ui dashboard, ui ux designer app 👨‍💻AI TOOLS OpenAI API, DeepFace, ML/DL frameworks (TensorFlow, Keras, PyTorch, Scikit-learn), LangChain, Mistral, AgenticAI, Transformers RAG + custom AI tools: Document recognition and processing, Market Grabber, project management bots, AI for telephony, video/audio analysis Mobile App Development Native Mobile Development: Android, Kotlin, Java, iOS, Swift, KMP, KMM. Cross-Platform/Hybrid App Development: Flutter, Swift, Objective C, React Native, Xamarin, MAUI. General Expertise Website & Full Stack Development: Full stack development with ai .net full stack developer, .net software engineer, .net programmer, full stack developer, ai python full stack developer django, full stack web developer, full stack development, cms developer DevOps/DevSecOps: AWS, Azure, Docker, Kubernetes, GitLab-CI, Ansible, Terraform, etc Cross-platform app building with three.js, web application design, webflow web designer, website builders Integration tools: Data integration, websockets, ABP Framework, discord, Autotask Experienced in .net core web api, fullstack .net developer roles, with strong skills as a .net specialist. Skilled angular .net react developer, java developer with solid c sharp expertise. Worked on kogito for business automation, delivered ui ux-focused solutions. As an azure data engineer, handled scalable data pipelines. rust developer, python projects include backend developer tasks. Built app as a xamarin and web developer using java and javascript. Skilled in postgresql and web scrapping. Maintained legacy systems with .net webform. Collaborated with nft marketers, managed nft collab manage tasks. Full stack with react nodejs, modern react, including react typescript, react native developer roles. Acted as product owner in agile teams. Cloud deployments done on azure. Built interactive UIs using blazor. Why Choose us Microsoft certified talented developers and senior .net developer team High QA standards, including qa engineer roles Modern solutions: NFT programmer, metaverse, Microsoft .net, windows 10, Power Apps developer, SharePoint, market grabber Scalable team: full stack software developer, front end programmer, ios developer, ui ux designer Industries Banking, Trading, Cryptocurrency, Asset Management, Lending, Retail, Real Estate & Property Management, Food Delivery, Entertainment, Hospitality, Construction, Sports & Fitness, Travel & Tourism, Wellness, Medical Dashboard, Marketplace, E-commerce, Automotive, Human Resources, Education, E-learning, AI Assistants Seek new projects to put our .net ai, bring value to individuals, startups, companies.

  • C#
  • React
  • Angular
  • .NET Framework
  • JavaScript
  • ASP.NET Core
  • Mobile App Development
  • Android App Development
  • iOS Development
  • Artificial Intelligence
  • TypeScript
  • Web Application
  • AI Development
  • Android
  • AI Agent Development
  • Python
  • Node.js
  • React Native
  • MySQL
  • Django
Joseph C.

Gdansk, Poland

$150/hr
5.0
31 jobs

I've worked in every domain of software. Tell me what you're up to and I'll lead us through an effective solution. - Backend specialist for 5 years at S&P and Banqsoft. - Mobile specialist for 7 years with Diversido, Noble Muffins and other clients. - Professional experience with React, TypeScript, C++ and Java. I got my start when I took over IT at a horse trailer dealership to gather money to move to Europe. At S&P, I took our team's first two microservices from zero to production. I later served as scrum master, and was given a technical excellence award for my work in SQL optimization. As a game developer, my Turbo Slicer product has been featured repeatedly by the Unity Asset Store. I wrote a finite element analysis kit for PlayWay S.A. to manage building collapse for the games Construction Machines 2016, Demolish & Build 2017 and Demolish & Build 2018. In my spare time I support new programmers on Codementor.io.

  • C#
  • Java
  • iOS Development
  • C++
  • Objective-C
  • Unity
  • Polish to English Translation
Marcin Z.

Lagow, Poland

$10/hr
5.0
5 jobs

I am a seasoned software developer with 20 years of experience, specializing in web development using .NET and ReactJS. In the past four years, I have honed my full-stack capabilities by building complex web applications and integrating APIs, while also implementing powerful solutions like Google Tag Manager. My unique journey from CNC programming and manufacturing automation to software development allows me to tackle challenges with a rigorous engineering mindset and innovative problem-solving skills. I have a solid foundation in Python for automating workflows and maintaining in-house applications. If you're looking for a reliable developer who can bridge the gap between technical precision and modern software practices, I’m here to help bring your projects to life. Let's connect and discuss how I can contribute to your success.

  • C#
  • Drive Software Solutions DRIVE
  • .NET Stack
  • .NET Core
  • .NET Framework
  • ASP.NET Web API
  • ASP.NET
  • ASP.NET Core
  • JavaScript
  • Web Application
  • Software Development
  • Python
  • React
  • TypeScript
  • LangChain
Alexey I.

Warsaw, Poland

$30/hr
4.7
22 jobs

Hi 👋 I’m a Unity programmer with 12+ years in game development. I build games from prototype to full release across mobile, WebGL, and PC, and I’m equally comfortable joining mid-project to fix critical issues, optimize performance, or stabilize unstable builds. Whether it’s a hyper-casual prototype, a mid-core RPG, or a multiplayer live-ops project — I deliver clean code, smooth gameplay, and reliable results. 🚀 🔹 What I do best Full-cycle Unity development — take your project from concept and prototype to launch-ready game Cross-platform builds — mobile, WebGL, PC, optimized for performance and memory Multiplayer & live-ops systems — Photon, PlayFab, analytics, monetization, retention improvements Expert bug fixing & optimization — tricky crashes, memory leaks, edge cases, build size reduction Legacy code rescue — stabilize and refactor outdated, messy, or incomplete projects 🔹 Work style Clear estimates and timelines before starting Regular progress updates with measurable results (daily or weekly) Open, fast communication; adapt quickly to feedback and changing priorities Focus on delivering working, polished, release-ready projects 🔹 Why work with me 12+ years in game development (indie & enterprise) Ability to deliver complete games for any genre and platform Clean, maintainable code designed for long-term development Strong debugging & optimization skills — fix critical bugs, improve performance, and reduce build sizes Trusted to rescue mid-project when things aren’t working, without slowing the schedule Clients praise my speed, reliability, and ability to deliver under tight deadlines 🛠 Tech Stack Unity, C#, Addressables, Photon, PlayFab, DOTS, ShaderGraph, Firebase, C++, Ruby, Objective-C, SQLite, IronSource, JSON, Protobuf, dev2dev, Appsflyer, Game Analytics, Tenjin, IAPs, ByteBrew, Yandex SDK, React, JavaScript, Google Play Services, Zenject 🧠 Selected Results PUA — Date Game & Love Stories: Created a custom scenario tool (cut content time 2h → 10min), implemented AI bots, fixed major production issues Idle Spellbound Mage RPG: Reduced build size by 75%, enabling a successful WebGL port without losing features Nanomedix: Transformed unstable, incomplete project into a release-ready product through stabilization, optimization, and feature expansion Zombie Shop: Solved elusive critical bugs QA couldn’t reproduce, stabilizing a high-profile release Merge Islanders: Enhanced core systems & performance; updates doubled revenue according to publisher 💬 Let’s talk Need help with full-cycle Unity development, optimization, bug fixing, or launching a complete game? I’m available for consultations, quick fixes, or long-term collaborations — let’s make your project a success.

  • C#
  • Unity
  • Game Development
  • Game Development Bug Fix
  • Game Prototype
  • Research & Development
  • Multiplayer
  • Photon Unity Networking
  • Game Design
  • Game UI/UX Design
  • Game Mechanics
  • Mobile Game Development
  • Mobile Game
  • WebGL
  • AR & VR Development
Anton K.

Wroclaw, Poland

$50/hr
5.0
89 jobs

I build AI-powered automations and modern web applications. What I deliver: — AI integration (OpenAI, Gemini APIs) into existing systems — Automated workflows and data pipelines (n8n, custom scripts) — Fullstack apps: Next.js, React, Supabase, Stripe — iOS apps with Swift — Infrastructure: AWS, Docker, CI/CD, Terraform 5+ years in web development, now focused on AI integration and modern TypeScript stack. Also available for: Laravel/PHP backends, Python scripting, web scraping, WordPress.

  • Python
  • jQuery
  • Bootstrap
  • HTML5
  • PHP
  • JavaScript
  • MySQL
  • WordPress
  • Laravel
  • MySQL Programming
Ihar P.

Krakow, Poland

$30/hr
4.2
42 jobs

Mobile Flutter Developer with DevOps expertise — building cross-platform iOS & Android apps and owning the full delivery pipeline: AWS, Kubernetes, Ansible, Terraform, CI/CD. 10+ years in software engineering. I deliver production-ready Flutter apps together with the infrastructure that builds, deploys, and runs them. Flutter Development: Flutter & Dart — performance optimization, clean architecture, responsive UI/UX State management — BLoC, Provider, MobX, Riverpod Animations & graphics — custom animations, CustomPainter, Rive/Lottie, shaders Maps & geolocation — Google Maps, Mapbox, real-time tracking Native integrations — platform channels, C++ libraries, real-time audio processing App Store & Google Play deployment, release management DevOps & Cloud Infrastructure: Infrastructure as Code — Terraform, Ansible; Kubernetes orchestration with Helm CI/CD — automated builds, testing, and deployments (GitHub Actions, Jenkins, GitLab CI, Fastlane, Docker), including mobile release pipelines to App Store and Google Play Monitoring & observability — Prometheus, Grafana Cloud platforms — AWS, Google Cloud (GCP), Hetzner; Linux server administration Firebase & Supabase — auth, real-time database, cloud functions, hosting Backend Development: Node.js, Python, Java, Dart backends API design — REST, GraphQL, gRPC, WebSockets Databases — PostgreSQL, MySQL, MongoDB, Redis, SQLite AI & LLM: AI/LLM integrations in production apps — OpenAI, Anthropic (Claude), Gemini APIs AI-assisted development workflow — Claude Code and OpenAI Codex Experience: multiple production apps delivered end-to-end as a solo developer — UI, backend, cloud infrastructure, and deployment automation. Comfortable owning a product fully or working inside an experienced team. I care about code quality, long-term maintainability, and delivering real value — not just completing tasks. If you need someone who understands mobile development, backend, and the infrastructure that connects them into a working product — I'd be glad to help. = = = Career Highlights = = = Oct 2024 – Present — Senior Flutter & DevOps Engineer Building production Flutter apps end-to-end with cloud infrastructure and deployment automation: AI/LLM-powered features, real-time systems, infrastructure as code. Working independently, owning products from UI to deployment. Stack: Flutter/Dart, Python, AWS & Google Cloud, Kubernetes, Terraform, Ansible, Docker, Firebase, Supabase, PostgreSQL, MySQL, Redis, MongoDB Dec 2018 – Oct 2024 — Senior Flutter Developer Six+ years of Flutter in production since its early releases: multiple apps shipped to App Store and Google Play, real-time and data-driven architectures, solo ownership from UI to backend. Stack: Flutter/Dart, Supabase, Google Cloud, Firebase, PostgreSQL, SQLite, Linux 2015 – 2018 — Full-Stack JavaScript Developer Web applications and data visualization for production use. Stack: JavaScript (React, D3), Node.js, Python/Django, MongoDB 2010 – 2013 — Java Developer Enterprise web applications. Earned Oracle Certified Professional, Java Programmer. Stack: Java, GWT, Oracle DB 2006 – 2008 — Web Developer First commercial projects; Linux as a daily driver since then. Stack: PHP, JavaScript, MySQL, Linux = = = Technologies = = = Flutter • Dart • BLoC • Provider • Riverpod • MobX • CustomPainter • Rive • Lottie • Google Maps • Mapbox • Push Notifications • Firebase Cloud Messaging • In-App Purchases • Hive • CI/CD pipeline • GitHub Actions • Jenkins • GitLab CI • Fastlane • Docker • Kubernetes • Helm • Terraform • CloudFormation • Ansible • Prometheus • Grafana • Bash scripting • AWS • EC2 • S3 • EKS • Lambda • Google Cloud • GCP • Firebase • Supabase • Linux • Node.js • Python • Django • PostgreSQL • MySQL • MongoDB • Redis • REST API • GraphQL • gRPC • WebSockets • LLM integration • RAG • AI chatbot • OpenAI API • Anthropic API • Claude API • Gemini API • Claude Code • OpenAI Codex • Stripe • App Store • Google Play

  • Flutter
  • Dart
  • Mobile App Development
  • DevOps
  • Docker
  • Kubernetes
  • CI/CD
  • Terraform
  • Amazon Web Services
  • Ansible
  • Linux
  • Firebase
  • PostgreSQL
  • Google Cloud Platform
  • Jenkins
  • Supabase
  • Node.js
  • Python
  • API Integration
  • Location-Based Service

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