.Net Developer

🏢 Summary: The offer is for a Senior .NET Developer with 5+ years of experience to design, develop, and maintain scalable backend applications using modern .NET technologies. The role focuses on building high-quality APIs, contributing to architectural decisions, and ensuring application reliability in cloud-based environments. It involves close collaboration with cross-functional teams and strong engagement in testing, CI/CD, and production support. 🗂️ Requirements: Minimum 5 years of experience with .NET development, Strong experience with C# and .NET Core, Solid understanding of REST APIs, Experience with Entity Framework Core, Strong knowledge of SQL, Experience with cloud platforms (Azure or AWS), Experience with CI/CD pipelines, Experience with Git version control, Experience with unit and integration testing, Experience with message broker systems, Familiarity with agile development practices 📃 Skills: C#, .NET, .NETCore, REST, EntityFramework, SQL, Azure, AWS, CI/CD, Git, UnitTesting, IntegrationTesting, MessageBroker, Angular, Docker, Kubernetes, Microservices 🏢 Description: Summary: We’re looking for a highly skilled .NET Developer with a minimum of 5 years of experience. This role focuses on solving complex problems, building high-quality software, and contributing to a collaborative engineering culture. The candidate should be passionate about clean architecture, modern .NET development, and delivering impactful solutions. Responsibilities: Analyze, design, develop, and maintain applications using .NET / .NET Core. Build scalable backend services (APIs). Collaborate with cross-functional teams (Business, Dev, Infra, etc.). Participate in code reviews to elevate engineering standards. Contribute to architectural decisions and technical roadmaps. Provide business support and monitor applications (level 2 support, incident resolution, and troubleshooting). Key Requirements: Strong experience with C# and .NET Core. Solid understanding of REST APIs, Entity Framework Core, and SQL. Familiarity with cloud platforms (Azure or AWS). Experience with CI/CD pipelines and version control (Git). Strong testing culture: unit tests, integration tests, and production validation. Familiarity with agile development practices. A mindset focused on quality, performance, and maintainability. Experience with a message broker. Nice to Have: Knowledge of microservices architecture. Experience with front-end frameworks (Angular). Background in distributed systems or high-availability environments. Knowledge of Docker & Kubernetes. Experience with Azure functions. Other Details: This position allows for flexibility and may accommodate remote work arrangements. Candidates should be prepared for collaborative team engagements with a focus on delivering high-quality software solutions.

🏢 Summary: Long-term remote role for a Senior .NET Developer with AI expertise to design and deliver AI-driven solutions within the Microsoft ecosystem. The position focuses on building and deploying AI agents in Microsoft Teams and integrating solutions with Azure AI and OpenAI services. The role covers end-to-end development, deployment, and production support of scalable intelligent systems. 🗂️ Requirements: Strong experience with C# and .NET, Proven experience building AI solutions in Microsoft ecosystem, Hands-on implementation of AI agents in Microsoft Teams, Experience with Azure AI, OpenAI, Cognitive Services, M365, Understanding of agent-based architecture and AI design patterns, Experience deploying and supporting production-grade solutions, Basic frontend experience with React or similar, Ability to work in English and Polish 📃 Skills: C#, .NET, Azure, OpenAI, CognitiveServices, M365, MicrosoftTeams, React, AI, AgentArchitecture 🏢 Description: We are looking for a Senior .NET Developer with AI experience to design and deliver cutting-edge solutions within the Microsoft ecosystem. This role is ideal for someone who combines strong backend engineering in C#/.NET with hands-on AI expertise , particularly in building and deploying AI agents Location: Remote Language: Polish and English Key Responsibilities Design and develop scalable AI-driven solutions using C# / .NET Build and deploy AI agents within Microsoft Teams (end-to-end ownership) Develop and implement agent-based architectures and intelligent systems Integrate solutions with Azure AI, OpenAI, and Microsoft services Deploy, monitor, and support solutions in production environments Collaborate with business and product teams to translate requirements into technical solutions Drive best practices in AI engineering, performance, and scalability Required Skills & Experience Strong experience as a .NET Developer (C#) – must-have Proven experience building AI solutions within Microsoft ecosystem Hands-on experience implementing AI agents in Microsoft Teams (critical requirement) Experience with Azure AI / OpenAI / Cognitive Services / M365 Understanding of agent-based architecture and AI design patterns Basic frontend experience ( React or similar ) Experience deploying and supporting production-grade solutions Strong problem-solving mindset and ability to work in fast-paced environments This is an long term project !!! If interested and available please send your CV for an immiediate consideration

🏢 Summary: Senior .NET Developer role focused on building and maintaining extended functionalities within a distributed, cloud-based system. The position involves working with modern .NET technologies, Angular, cloud platforms, and microservices architecture in an Agile/Scrum environment. The role requires close collaboration with stakeholders while applying clean code and best development practices. 🗂️ Requirements: Bachelor’s degree or Microsoft .NET certification, Strong experience with .NET and C#, Experience with ASP.NET Core and Web API, Experience with Angular (2+), Experience with Azure or AWS, Experience with microservices and distributed systems, Experience with PostgreSQL and SQL Server, Experience with database migrations, Experience with GitHub, Knowledge of SOLID and DRY principles, Fluent English (written and spoken) 📃 Skills: .NET, C#, ASP.NET, Angular, Azure, AWS, Microservices, Kafka, PostgreSQL, SQL, GitHub, WebAPI 🏢 Description: We are looking for a Senior .Net Developer . Responsibility: Develop and maintain extended functionalities Collaborate closely with internal and external consultants, as well as key business stakeholders Work with technologies including Angular (2+), Azure/AWS Cloud, and the .NET stack (.NET 8/9, ASP.NET Core, C#, Web API), along with microservices and distributed systems, Kafka (or similar messaging tools), and databases such as PostgreSQL and SQL Server Actively participate in daily stand-ups, sprint reviews, and planning sessions with Danish colleagues, contributing to continuous improvement of the Scrum process To succeed in this role, you: Hold a relevant bachelor’s degree or a Microsoft certification related to .NET Apply clean code principles and best practices such as SOLID and DRY, with a strong object-oriented mindset Have proven experience in Microsoft .NET (C#), GitHub, PostgreSQL, and database migrations Communicate fluently in English, both written and spoken

🏢 Summary: Long-term project for a Senior/Expert .NET Developer focused on backend and API development within enterprise banking systems. The role involves developing and optimizing software solutions, working with legacy code, and providing technical leadership and mentorship. The position emphasizes high-quality standards, collaboration, and code excellence in a complex financial environment. 🗂️ Requirements: Strong knowledge of C#, Strong knowledge of .NET framework, Expertise in ASP.NET Core, Experience in API development, Experience with SQL Server design and development, Ability to analyze and troubleshoot legacy code, Solid understanding of OOP principles, Knowledge of software engineering best practices 📃 Skills: C#, .NET, ASP.NET, SQL, T-SQL, Git, Jenkins, Angular, HTML, CSS, JavaScript, Visual Studio, Postman, Swagger, Bitbucket, Bootstrap, SQL Server 🏢 Description: We’re looking for an Expert/Senior .NET Developer to join a long-term project for a leading client in the banking industry. Project Type: Enterprise banking systems – backend & API development, code optimization, and mentorship Responsibilities: Design, develop, and maintain software solutions Analyze, refactor, and troubleshoot legacy code Conduct code reviews and uphold high-quality standards Collaborate with QA and Business Analysts Mentor junior developers and provide technical leadership Must-Have Experience: Strong knowledge of C# and the .NET framework Expertise in ASP.NET Core and API development Experience with SQL Server (design & development) Ability to work with and troubleshoot legacy code Solid understanding of OOP and software engineering best practices Nice-to-Have: Familiarity with Git, Jenkins, and testing frameworks Understanding of cloud concepts & web security best practices Knowledge of frontend technologies (Angular, HTML, CSS, JavaScript) Tools & Tech Stack:Visual Studio, Postman, Swagger, Bitbucket, SQL Server Management Studio, T-SQL, Bootstrap (or similar)

🏢 Summary: Mid/Senior .NET Developer role focused on designing and developing modern web and enterprise backend systems in a microservices architecture. The position involves building and maintaining APIs, working with databases, implementing tests, and supporting CI/CD and containerized environments. Opportunity to contribute to system architecture, refactoring, and .NET migrations in an Agile setup. 🗂️ Requirements: Minimum 4 years experience with .NET (C#), Experience with .NET Core / .NET 8+ and ASP.NET, Experience with Entity Framework, Experience with MSSQL, MySQL, PostgreSQL or MongoDB, Ability to design and implement microservices, Experience building REST and/or GraphQL APIs, Experience with Docker and Kubernetes, Experience with CI/CD pipelines, Experience with Git and Azure DevOps, Knowledge of Agile/Scrum, Ability to write unit and integration tests, English level B2/C1 📃 Skills: C#, .NET, .NETCore, .NET8, ASP.NET, EntityFramework, MSSQL, MySQL, PostgreSQL, MongoDB, REST, GraphQL, Docker, Kubernetes, CICD, Git, AzureDevOps, Jira, Agile, Scrum 🏢 Description: .NET Developer (mid/senior) – 4+ lata doświadczenia Opis stanowiska Do naszego zespołu poszukujemy doświadczonego .NET Developera , który będzie uczestniczyć w tworzeniu i rozwijaniu nowoczesnych aplikacji webowych i systemów enterprise. Jeśli masz pasję do pisania czystego, skalowalnego kodu, doświadczenie w pracy z mikroserwisami i chcesz wpływać na kierunek projektów – to stanowisko jest dla Ciebie. Zakres obowiązków Projektowanie, rozwój i utrzymanie aplikacji backendowych w .NET (C#). Tworzenie i konsumowanie RESTful i/lub GraphQL API. Budowa i utrzymanie mikroserwisów. Współpraca z zespołem frontendowym (React/Angular/Vue) w celu implementacji funkcjonalności full-stack. Udział w projektowaniu architektury systemów, refaktoryzacji oraz migracji do nowszych wersji .NET. Tworzenie i utrzymywanie testów jednostkowych, integracyjnych i e2e. Wsparcie procesów CI/CD i DevOps (Docker, Kubernetes, Azure/AWS). Dokumentowanie rozwiązań i współpraca w metodykach Agile/Scrum. Wymagania Minimum 4 lata doświadczenia w pracy z .NET (C#). Znajomość .NET Core / .NET 8+ , ASP.NET, Entity Framework. Doświadczenie z bazami danych : MSSQL, MySQL, PostgreSQL, MongoDB. Umiejętność projektowania i implementacji mikroserwisów . Znajomość REST i/lub GraphQL API . Doświadczenie w pracy z Dockerem, Kubernetes, CI/CD . Znajomość systemów kolejkowych (RabbitMQ, Kafka – mile widziane). Doświadczenie w pracy z frameworkami frontendowymi (React, Angular, Vue) – plus. Znajomość metodologii Agile/Scrum i narzędzi typu Jira, Git, Azure DevOps . Umiejętność pisania testów jednostkowych i integracyjnych. Dobra znajomość języka angielskiego (min. B2/C1). Mile widziane Doświadczenie w tworzeniu systemów rozproszonych i chmurowych . Znajomość DDD (Domain-Driven Design) . Umiejętność mentorowania młodszych programistów. Oferujemy Stabilne zatrudnienie w dynamicznie rozwijającej się firmie SaaS. B2B lub UoP, możliwość pracy w 100% zdalnej. Pracę w międzynarodowym zespole ekspertów. Możliwość rozwoju kompetencji w obszarze chmury, mikroserwisów i nowoczesnych technologii. Elastyczne godziny pracy i możliwość pracy zdalnej. Budżet szkoleniowy i wsparcie w certyfikacjach.

🏢 Summary: Backend Developer (.NET) role focused on development, maintenance, and modernization of an existing logistics system. The position involves working with legacy code, fixing bugs, refactoring, and improving business logic within a live operational environment. The role requires close collaboration with development and analytics teams. 🗂️ Requirements: 3–5 years of experience with .NET, Proficiency in C#, Experience with ASP.NET MVC or ASP.NET Core, Strong knowledge of SQL Server, Experience working with legacy codebases, Ability to debug and analyze complex issues, Experience with REST API, English level B2 minimum 📃 Skills: .NET, C#, ASP.NET, MVC, Core, SQL, SQLServer, REST, EntityFramework, Docker, UnitTesting 🏢 Description: Organizacja z branży logistycznej, rozwijająca własne systemy operacyjne, poszukuje osoby na stanowisko Backend Developer (.NET). Rola skupiona jest na rozwoju i stabilizacji istniejącego systemu oraz stopniowym jego unowocześnianiu. Zakres obowiązków Rozwój i utrzymanie systemu w technologii .NET Analiza i rozwiązywanie błędów w systemie (bugfixy) Refaktoryzacja istniejącego kodu Analiza logiki biznesowej i jej usprawnianie Współpraca z zespołem developerskim i analitycznym Praca z kodem bez pełnej dokumentacji Wymagania Min. 3–5 lat doświadczenia w .NET Dobra znajomość: C# ASP.NET (MVC / Core) SQL Server Doświadczenie w pracy z istniejącym kodem (legacy) Umiejętność debugowania i analizy problemów Znajomość REST API Znajomość języka angielskiego na poziomie minimum B2 Mile widziane Entity Framework (klasyczny i Core) Podstawy testów jednostkowych Znajomość Docker Oferujemy Pracę przy systemach o realnym wpływie na operacje biznesowe Możliwość rozwoju technologicznego Stabilne zatrudnienie Wpływ na jakość i rozwój systemu

🏢 Summary: Senior .NET Developer role focused on building and enhancing a custom industrial application supporting end-to-end production and logistics processes. The position involves backend development in .NET, frontend development with Angular, and designing microservices-based solutions deployed in AWS. The project emphasizes scalability, traceability, and continuous product improvement. 🗂️ Requirements: Minimum 5 years of commercial experience as a .NET Developer, Strong hands-on experience with .NET in backend development, Practical experience with Angular in frontend development, Experience with microservices-based architecture, Experience with AWS cloud services 📃 Skills: .NET, Angular, AWS, Microservices 🏢 Description: We are looking for a Senior .NET Developer to join a long‑term product development project in the industrial and manufacturing domain. The role focuses on building and maintaining a custom‑built application that supports end‑to‑end production and logistics processes for industrial clients. The project uses modern technologies and follows an innovation‑driven approach, with strong emphasis on process traceability, scalability, and continuous improvement. Your tasks Develop and maintain backend solutions using .NET for a custom industrial application Implement new product functionalities according to business and process requirements Build and extend frontend features using Angular Design and develop solutions based on a microservices architecture Develop, deploy, and maintain solutions in an AWS cloud environment Requirements Minimum 5 years of commercial experience as a .NET Developer Strong hands‑on experience with .NET in backend development Practical experience with Angular in frontend development Experience working with microservices‑based architectures Experience working with AWS cloud services Fluency in English Residing in Poland required

🏢 Summary: Senior .NET Backend developer role for a business-critical project focused on building, maintaining and optimizing backend solutions and system integrations. The consultant will design and implement REST services, ensure secure authentication/authorization, and maintain high code quality across development and operations. The position involves performance optimization, monitoring improvements, and close collaboration with architects and development teams. 🗂️ Requirements: Strong experience with .NET and C#, Experience developing REST APIs and integrations, Experience with OAuth2, OpenID Connect or JWT, Experience with authentication and authorization mechanisms, Experience handling JSON, XML and CSV formats, Focus on Clean Code and maintainable solutions, Experience with test automation and quality assurance, Experience with logging, monitoring and production troubleshooting, Experience with performance analysis and optimization 📃 Skills: .NET, C#, REST, OAuth2, OpenID, JWT, JSON, XML, CSV, CI/CD, Azure, Logging, Monitoring, Testing, Performance 🏢 Description: Senior .NET Backend Udvikler Opgaven På vegne af en af vores kunder søger vi en erfaren Senior .NET Backend Udvikler til et forretningskritisk udviklingsforløb. Konsulenten bliver en del af et udviklingsteam med ansvar for udvikling, vedligeholdelse og optimering af backend-løsninger samt integrationer til interne og eksterne systemer. Der søges en profil, der kan arbejde selvstændigt, bidrage til arkitektur- og designbeslutninger samt sikre høj kvalitet i leverancerne gennem hele udviklings- og driftsprocessen. Ansvarsområder Udvikling af backend-løsninger i .NET/C# Design og implementering af REST-baserede services og integrationer Arbejde med autentifikation, autorisation og token-baserede sikkerhedsløsninger Håndtering af forskellige filformater og dataudveksling mellem systemer Fokus på kodekvalitet, maintainability og best practices Implementering og forbedring af logging, monitorering og alarmering Test, fejlsøgning og performanceoptimering Bidrage til stabil drift og løbende forbedringer af eksisterende løsninger Samarbejde tæt med forretning, arkitekter og øvrige udviklingsteams Krav til kompetencer Skal-have Solid erfaring med .NET og C# Erfaring med udvikling af REST API’er og integrationer Erfaring med OAuth2, OpenID Connect, JWT eller tilsvarende teknologier Erfaring med autentifikation og autorisation Erfaring med håndtering af filformater som JSON, XML og CSV Fokus på kodekvalitet, Clean Code og maintainable løsninger Erfaring med testautomatisering og kvalitetssikring Erfaring med logging, monitorering og fejlsøgning i produktionsmiljøer Erfaring med performanceanalyse og optimering Flydende dansk i skrift og tale Fordelagtigt Erfaring med Azure-platformen Erfaring med CI/CD pipelines Erfaring fra finans-, pensions- eller forsikringsområdet Erfaring med observability-værktøjer og Application Monitoring Personlige kvalifikationer Selvstændig og proaktiv Struktureret og kvalitetsbevidst Stærke samarbejdsevner God til at kommunikere med både tekniske og forretningsmæssige interessenter Tager ansvar for opgaver fra analyse til implementering og drift Praktisk information Opstart: Hurtigst muligt Varighed: 3 måneder med mulighed for forlængelse Lokation: København Tilstedeværelse: Onsite minimum 5 dage om ugen

🏢 Summary: The offer is for a .NET Developer responsible for building and enhancing scalable backend systems and REST APIs for global travel platforms. The role involves contributing to architecture, optimizing performance, and collaborating in an agile environment to deliver reliable, high-quality software. It includes hybrid work, international projects, and professional development opportunities. 🗂️ Requirements: Minimum 3 years of commercial experience with .NET development, Strong knowledge of ASP.NET MVC, Experience developing REST APIs, Experience working in agile software development teams, Good knowledge of MS SQL, Good knowledge of Elasticsearch, Experience with CI/CD tools (Git, TeamCity or similar), Experience writing unit and integration tests, Ability to write clean, maintainable, and well-tested code, Very good English communication skills 📃 Skills: .NET, ASP.NET, MVC, REST, MS SQL, Elasticsearch, Git, TeamCity, CI/CD, UnitTesting, IntegrationTesting, Umbraco, Angular, AWS 🏢 Description: We are looking for a .NET Developer to join our team and help build scalable, high-quality solutions that power our global travel platforms. In this role, you will work on the development and enhancement of backend systems, contribute to architectural decisions, and collaborate with cross-functional teams to deliver reliable and efficient software used by customers worldwide. Your responsibilities Design, develop, and maintain applications using .NET technologies Translate business requirements into scalable and maintainable technical solutions Develop and enhance REST APIs and backend services Maintain, troubleshoot, and improve existing applications Refactor and optimize code to improve performance, scalability, and maintainability Write clean, well-structured, and testable code following best practices Participate in code reviews and contribute to improving development standards Identify and resolve performance bottlenecks and system issues Contribute to application architecture, technical design, and system documentation Collaborate closely with developers, QA engineers, Product Owners, and other stakeholders in an agile environment Our requirements At least 3 years of commercial experience with .NET development Strong knowledge of ASP.NET MVC and REST APIs Experience working within agile software development teams Good knowledge of MS SQL and Elasticsearch Experience with CI/CD tools and practices (Git, TeamCity or similar) Experience writing unit and integration tests Ability to write clean, maintainable, and well-tested code Very good English communication skills Nice to have Experience with Umbraco CMS Experience with Angular Knowledge of AWS services and cloud-based solutions How we work Clean Code principles Design patterns and software engineering best practices Code reviews and knowledge sharing Static code analysis Continuous Integration and Continuous Deployment (CI/CD) Agile and collaborative development environment What we offer Hybrid work model (1–2 days per week in our Katowice office) Opportunity to work on international, large-scale projects Attractive remuneration paid in EUR Flexible working hours Individual development budget Partially or fully funded training and certifications English lessons Mentoring and support from experienced technical leaders Participation in conferences in Poland and abroad A culture focused on learning, collaboration, and knowledge sharing Space to innovate and bring your own ideas to life Support for IT community initiatives

🏢 Summary: Senior .NET Developer role focused on building and modernizing a real-time digital platform with microservices architecture and Kubernetes readiness. The position involves backend development in .NET, API integrations, architectural decision-making, and occasional frontend work in React within a highly autonomous technical team. The offer includes hybrid work, flexible hours, and long-term B2B cooperation. 🗂️ Requirements: 6+ years commercial experience as .NET Developer, Very good knowledge of modern .NET versions, Experience with asynchronous and multithreaded programming, Practical knowledge of microservices or SOA architecture, Experience with REST API, Knowledge of CI/CD and basic DevOps practices, Basic knowledge of React, Understanding of application security principles, Teamwork and communication skills, English level B1/B2 📃 Skills: .NET, C#, REST, React, RabbitMQ, Kubernetes, CI/CD, DevOps, SOA, Microservices, API, Node.js 🏢 Description: Cześć! W związku z rozwojem firmy oraz planowaną budową kolejnych zespołów, poszukujemy Senior .NET Developera. Dołączysz do zespołu rozwijającego zaawansowaną, cyfrową platformę reagującą w czasie rzeczywistym na zdarzenia z wielu zewnętrznych systemów. Projekt wyróżnia się złożoną logiką biznesową, kodem wielowątkowym oraz dużym naciskiem na wydajność i optymalizację w kluczowych obszarach. System przechodzi obecnie transformację z architektury monolitycznej na mikroserwisy, przygotowując się do wdrożenia w środowisku Kubernetes. Nowe funkcjonalności powstają jako niezależne, skonteneryzowane serwisy, komunikujące się za pomocą RabbitMQ i API REST, co daje zespołowi pełną swobodę w kształtowaniu kierunku technologicznego. W roli tej będziesz miał możliwość podejmować wraz zespołem kluczowe decyzje architektoniczne, brać czynny udział w doborze technologii, a także uczestniczyć w całym cyklu życia produktu. Nasz dział IT ma pełną kontrolę nad decyzjami technologicznymi, co w połączeniu z płaską strukturą w firmie, pozwala na sprawne wprowadzanie innowacyjnych rozwiązań. Widełki: 135 - 189 PLN net/h (B2B) + VAT Zakres odpowiedzialności: - Rozwój i utrzymanie backendu w oparciu o .NET - Projektowanie i implementacja skalowalnych, wydajnych rozwiązań - Tworzenie i rozwój API oraz integracji systemowych - Okazjonalna praca przy warstwie frontendowej w React - Dbanie o jakość kodu poprzez Code Review i dobre praktyki - Współpraca z innymi developerami oraz zespołami technicznymi - Aktywny udział w decyzjach technicznych i architektonicznych Wymagania: - Minimum 6 lat doświadczenia komercyjnego jako .NET Developer - Bardzo dobra znajomość aktualnych wersji .NET - Doświadczenie w pracy z kodem asynchronicznym i wielowątkowym - Praktyczna znajomość architektury mikroserwisowej lub SOA - Doświadczenie w pracy z API (REST) - Znajomość CI/CD oraz podstawowych praktyk DevOps - Podstawowa znajomość React i gotowość do realizowania okazjonalnych zadań frontendowych - Świadomość zasad bezpieczeństwa aplikacji - Dobre umiejętności komunikacyjne i doświadczenie w pracy zespołowej - Język angielski na poziomie min. B1/B2 Mile widziane: - Zainteresowanie architekturą systemów - Znajomość Node.js - Zainteresowanie obszarem DevOps Co otrzymasz? - Atrakcyjne wynagrodzenie w oparciu o kontrakt B2B: 135 - 189 PLN net/h + VAT - Swobodny wybór narzędzi i możliwość wpływu na kształt i rozwój stanowiska - Stabilne zatrudnienie na kontrakcie na czas nieokreślony - Elastyczne godziny pracy - W 80% pracę zdalną - Dużą niezależność i samodzielność - Możliwość rozwoju i proponowania rozwiązań - Bezpośredni wpływ na architekturę i rozwój systemów - Budżet na zakup sprzętu - Pakiet kafeteryjny - Współpracę z zespołem doświadczonych programistów, w tym bezpośrednio z CTO firmy - Dobrą atmosferę oraz nastawienie na rozwiązywanie problemów