Senior .NET Developer

🏢 Summary: B2B contract opportunity for a Senior Node.js Developer to design, build, and maintain scalable backend applications and APIs across diverse software projects, including AI-driven and legacy modernization initiatives. The role focuses on high-quality Node.js development, architecture contribution, and cloud-based deployments in Agile teams. 🗂️ Requirements: 5+ years of experience in Node.js development, Experience with Express.js or NestJS frameworks, Strong knowledge of JavaScript and TypeScript, Understanding of asynchronous programming and event-driven architecture, Experience building and integrating RESTful APIs, Experience with SQL and NoSQL databases, Experience with cloud platforms (AWS, Azure, or GCP), Knowledge of CI/CD pipelines, Experience with version control systems, Experience working in Agile/Scrum teams, English level B2 or higher, Experience with AI technologies and AI-powered features development 📃 Skills: Node.js, Express.js, NestJS, JavaScript, TypeScript, REST, SQL, NoSQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, GCP, CI/CD, Git, AI 🏢 Description: Who we are: We are Inspeerity (part of DevelopX group), engineering consultancy providing software development and consultancy. Our primary expertise is systems architecture and full stack development – from defining project requirements, to designing, building, and deploying software applications for web, backend, enterprise and mobile. We are crazy about technology, serious about people. About position: We are currently building our talent pool for future Senior Node.js Developer roles. As our company is expanding, you may have the opportunity to work on a variety of software solutions across multiple initiatives, including projects we will be delivering in the future, from building native AI solutions to modernizing legacy systems. If you enjoy collaborating in a skilled team and are committed to delivering top-notch software, we’d love to connect. We're not prescriptive about background. Whether you've worked in fintech, SaaS, e-commerce, or enterprise systems — what matters is that you've shipped production software at scale, cared about its reliability, and learned from what broke. TL;DR • Who: Senior Node.js Developer • Contract Type: B2B Framework Agreement • Salary range: Up to 150 PLN/h • Company: Software House What you’ll be doing: • Designing, implementing, and maintaining high-quality Node.js applications. • Developing backend components and APIs to support scalable software solutions. • Collaborating with cross-functional teams. • Reviewing and refactoring code to ensure maintainability, performance, and security. • Participating in technical design discussions and contributing to architecture decisions. • Writing and maintaining technical documentation for systems, APIs, and processes. • Supporting deployment and integration of applications in different environments. You will be the best fit if you have: • 5+ years of experience as a Node.js developer, preferably with exposure to frameworks such as Express.js , NestJS , or similar. • Strong understanding of JavaScript/TypeScript, asynchronous programming, and event-driven architecture. • Experience with RESTful APIs and web services integration. • Familiarity with SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB). • Experience with cloud environments such as AWS, Azure, or GCP. • Knowledge of CI/CD pipelines and version control systems. • Strong problem-solving skills and ability to troubleshoot complex issues. • Experience working in Agile/Scrum teams and contributing to iterative development. • English level B2 or higher. • Experience with AI technologies, including using AI tools for development and building AI-powered features or applications. What we offer • Remote work or working from our Bialystok, Warsaw, Rzeszow offices. It's up to you! • Collaboration with experienced and engaged people who will appreciate your work and support you whenever you need it 😊 • Hybrid and flexible cooperation model based on a B2B Framework Agreement. • Great working conditions and best equipment: Dell or MacBook, your choice. Good to know: We don’t require a degree. We don’t do whiteboard puzzles or trick questions. Our interview process is practical: a technical conversation, and a chat about how you work. We value direct communication and intellectual curiosity. If you’re someone who gets excited debugging a tricky concurrency issue - not because you have to, but because you want to understand it — we’ll get along well.

🏢 Summary: B2B contract role for a Senior Java Developer focused on designing and maintaining scalable backend systems and APIs across diverse software projects, including AI-driven and legacy modernization initiatives. The position involves architectural input, code quality improvements, and deployment support in cloud environments within Agile teams. 🗂️ Requirements: Minimum 5 years of experience as a Java Developer, Commercial experience with Spring Boot or Hibernate, Strong knowledge of object-oriented programming and design patterns, Experience building and integrating RESTful APIs, Experience with SQL and NoSQL databases, Experience with cloud platforms (AWS, Azure, or GCP), Knowledge of CI/CD pipelines and version control systems, Experience working in Agile/Scrum teams, English proficiency at B2 level or higher, Experience with AI technologies or AI-powered solutions 📃 Skills: Java, Spring, SpringBoot, Hibernate, REST, SQL, NoSQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, GCP, CI/CD, Git, OOP, Scrum, AI 🏢 Description: About position: We are currently building our talent pool for future Senior Java Developer roles. As our company is expanding, you may have the opportunity to work on a variety of software solutions across multiple initiatives, including projects we will be delivering in the future, from building native AI solutions to modernizing legacy systems. If you enjoy collaborating in a skilled team and are committed to delivering top-notch software, we’d love to connect. We're not prescriptive about background. Whether you've worked in fintech, SaaS, e-commerce, or enterprise systems, what matters is that you've shipped production software at scale, cared about its reliability, and learned from what broke. Who we are: We are Inspeerity (part of DevelopX group), engineering consultancy providing software development and consultancy. Our primary expertise is systems architecture and full stack development – from defining project requirements, to designing, building, and deploying software applications for web, backend, enterprise and mobile. We are crazy about technology, serious about people. TL;DR • Who : Senior Java Developer • Contract Type : B2B Framework Agreement. • Salary range: Up to 150 PLN/h • Company : Software House What you’ll be doing: Designing, implementing, and maintaining high-quality Java applications. Developing backend components and APIs to support scalable software solutions. Collaborating with cross-functional teams. Reviewing and refactoring code to ensure maintainability, performance, and security. Participating in technical design discussions and contributing to architecture decisions. Writing and maintaining technical documentation for systems, APIs, and processes. Supporting deployment and integration of applications in different environments. You will be the best fit if you have: 5 years of experience as a Java developer, preferably with exposure to Spring Boot, Hibernate, or similar frameworks. Strong understanding of object-oriented programming, design patterns, and clean code principles. Experience with RESTful APIs and web services integration. Familiarity with SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB). Experience with cloud environments such as AWS, Azure, or GCP. Knowledge of CI/CD pipelines and version control systems (e.g., Git). Strong problem-solving skills and ability to troubleshoot complex issues. English level B2 or higher. Experience working in Agile/Scrum teams and contributing to iterative development. Experience with AI technologies, including using AI tools for development and building AI-powered features or applications. What we offer : Remote work or working from our Bialystok, Warsaw, Rzeszow offices. It's up to you! Collaboration with experienced and engaged people who will appreciate your work and support you whenever you need it 😊 Hybrid and flexible cooperation model based on a B2B Framework Agreement. Great working conditions and best equipment: Dell or MacBook, your choose. Good to know: We don’t require a degree. We don’t do whiteboard puzzles or trick questions. Our interview process is practical: a technical conversation and a chat about how you work. We value direct communication and intellectual curiosity. If you’re someone who gets excited about debugging a tricky concurrency issue - not because you have to, but because you want to understand it — we’ll get along well.

🏢 Summary: Offer for a Senior Frontend Developer specializing in Angular to design, build, and maintain scalable, high-quality web applications within diverse software projects. The role involves frontend architecture decisions, integration with backend services, and collaboration in Agile teams. Contract is B2B with remote flexibility and focus on delivering production-grade solutions. 🗂️ Requirements: 5+ years Frontend development experience, Strong Angular 2+ expertise, Proficiency in JavaScript and TypeScript, Knowledge of HTML5 and CSS3, Experience with NgRx or state management, Experience integrating REST APIs, Familiarity with Webpack, Vite, npm or yarn, Experience with testing frameworks, Knowledge of CI/CD pipelines, Proficiency with Git, Experience in Agile/Scrum, English B2 or higher, Experience with AI tools or AI-powered features 📃 Skills: Angular, JavaScript, TypeScript, HTML5, CSS3, NgRx, REST, Webpack, Vite, npm, yarn, Jasmine, Karma, Cypress, Git, CICD, Agile, Scrum, AI 🏢 Description: Who we are: We are Inspeerity (part of DevelopX group), engineering consultancy providing software development and consultancy. Our primary expertise is systems architecture and full stack development – from defining project requirements, to designing, building, and deploying software applications for web, backend, enterprise and mobile. We are crazy about technology, serious about people. About position: We are currently building our talent pool for future Senior Frontend Developer (Angular) roles. As our company is expanding, you may have the opportunity to work on a variety of software solutions across multiple initiatives, including projects we will be delivering in the future, from building native AI solutions to modernizing legacy systems. If you enjoy collaborating in a skilled team and are committed to delivering top-notch software, we’d love to connect. We're not prescriptive about background. Whether you've worked in fintech, SaaS, e-commerce, or enterprise systems - what matters is that you've shipped production software at scale, cared about its reliability, and learned from what broke. TL;DR • Who: Senior Frontend Developer (Angular) • Contract Type: B2B Framework Agreement • Salary range: Up to 140 PLN/h • Company: Software House What you’ll be doing: • Designing, implementing, and maintaining high-quality frontend applications using Angular. • Building responsive, user-friendly interfaces and reusable UI components. • Collaborating with cross-functional teams including backend developers, designers, and product stakeholders. • Reviewing and refactoring code to ensure maintainability, performance, and scalability. • Participating in technical design discussions and contributing to frontend architecture decisions. • Writing and maintaining technical documentation for components and frontend processes. • Supporting integration with backend services and APIs. You will be the best fit if you have: • 5+ years of experience as a Frontend Developer, with strong expertise in Angular (2+). • Strong understanding of JavaScript / TypeScript, HTML5, and CSS3. • Experience with state management solutions (e.g., NgRx) and component-based architecture. • Experience with RESTful APIs and integration with backend services. • Familiarity with modern frontend tooling (e.g., Webpack, Vite, npm/yarn). • Knowledge of performance optimization techniques and building scalable web applications. • Experience with testing frameworks (e.g., Jasmine, Karma, Cypress or similar). • Knowledge of CI/CD pipelines and version control systems (e.g., Git). • Strong problem-solving skills and attention to detail. • English level B2 or higher. • Experience working in Agile/Scrum teams and contributing to iterative development. • Experience with AI technologies, including using AI tools for development and building AI-powered features or applications. What we offer • Remote work or working from our Bialystok, Warsaw, Rzeszow offices. It's up to you! • Collaboration with experienced and engaged people who will appreciate your work and support you whenever you need it 😊 • Hybrid and flexible cooperation model based on a B2B Framework Agreement. • Great working conditions and best equipment: Dell or MacBook, your choice. Good to know: We don’t require a degree. We don’t do whiteboard puzzles or trick questions. Our interview process is practical: a technical conversation, and a chat about how you work. We value direct communication and intellectual curiosity. If you’re someone who gets excited debugging a tricky concurrency issue - not because you have to, but because you want to understand it — we’ll get along well.

🏢 Summary: Senior Frontend Developer (React) role focused on designing and delivering scalable, high-quality frontend applications using React and Next.js across diverse software projects, including AI-driven and legacy modernization initiatives. The position involves architectural decisions, performance optimization, API integration, and collaboration within cross-functional Agile teams. B2B contract with opportunity to work on production systems at scale. 🗂️ Requirements: 5+ years experience as Frontend Developer, Strong expertise in React, Proficiency in JavaScript, Proficiency in TypeScript, Strong knowledge of HTML5, Strong knowledge of CSS3, Experience with Next.js including SSR and SSG, Experience with state management libraries, Experience integrating RESTful APIs, Familiarity with modern frontend tooling, Experience with testing frameworks, Knowledge of CI/CD pipelines, Proficiency with Git, Experience working in Agile/Scrum, English level B2 or higher 📃 Skills: React, Next.js, JavaScript, TypeScript, HTML5, CSS3, Redux, Zustand, REST, Vite, Webpack, npm, yarn, Jest, ReactTestingLibrary, Cypress, CI/CD, Git, Agile, Scrum, AI 🏢 Description: Who we are: We are Inspeerity (part of DevelopX group), engineering consultancy providing software development and consultancy. Our primary expertise is systems architecture and full stack development – from defining project requirements, to designing, building, and deploying software applications for web, backend, enterprise and mobile. We are crazy about technology, serious about people. About position: We are currently building our talent pool for future Senior Frontend Developer (React) roles. As our company is expanding, you may have the opportunity to work on a variety of software solutions across multiple initiatives, including projects we will be delivering in the future, from building native AI solutions to modernizing legacy systems. If you enjoy collaborating in a skilled team and are committed to delivering top-notch software, we’d love to connect. e're not prescriptive about background. Whether you've worked in fintech, SaaS, e-commerce, or enterprise systems — what matters is that you've shipped production software at scale, cared about its reliability, and learned from what broke. TL;DR • Who: Senior Frontend Developer (React) • Contract Type: B2B Framework Agreement • Salary range: Up to 140 PLN/h • Company: Software House What you’ll be doing: • Designing, implementing, and maintaining high-quality frontend applications using React. • Building modern, responsive user interfaces and reusable components. • Working with frameworks like Next.js to deliver performant, scalable applications (including SSR/SSG when applicable). • Collaborating with cross-functional teams including backend developers, designers, and product stakeholders. • Reviewing and refactoring code to ensure maintainability, performance, and scalability. • Participating in technical design discussions and contributing to frontend architecture decisions. • Writing and maintaining technical documentation for components and frontend processes. • Supporting integration with backend services and APIs. You will be the best fit if you have: • 5+ years of experience as a Frontend Developer, with strong expertise in React. • Strong understanding of JavaScript / TypeScript, HTML5, and CSS3. • Experience building applications with frameworks such as Next.js, including server-side rendering and static generation. • Experience with state management approaches (e.g., Redux, Zustand, or similar). • Experience with RESTful APIs and integration with backend services. • Familiarity with modern frontend tooling (e.g., Vite, Webpack, npm/yarn). • Knowledge of performance optimization techniques and building scalable web applications. • Experience with testing frameworks (e.g., Jest, React Testing Library, Cypress or similar). • Knowledge of CI/CD pipelines and version control systems (e.g., Git). • Strong problem-solving skills and attention to detail. • English level B2 or higher. • Experience working in Agile/Scrum teams and contributing to iterative development. • Experience with AI technologies, including using AI tools for development and building AI-powered features or applications. What we offer • Remote work or working from our Bialystok, Warsaw, Rzeszow offices. It's up to you! • Collaboration with experienced and engaged people who will appreciate your work and support you whenever you need it 😊 • Hybrid and flexible cooperation model based on a B2B Framework Agreement. • Great working conditions and best equipment: Dell or MacBook, your choice. Good to know: We don’t require a degree. We don’t do whiteboard puzzles or trick questions. Our interview process is practical: a technical conversation, and a chat about how you work. We value direct communication and intellectual curiosity. If you’re someone who gets excited debugging a tricky concurrency issue - not because you have to, but because you want to understand it — we’ll get along well.

🏢 Summary: Senior Full-Stack Developer role focused on building a modern, headless e-commerce and marketing platform using cloud-based, composable architecture. The position involves end-to-end development across backend and frontend, CI/CD automation, and production support within a 12-month B2B contract. The project aims to deliver a fully personalized customer experience in the building materials industry. 🗂️ Requirements: Minimum 4 years experience with DotNet and ASPNETCore, Strong experience with C# and full-stack web development, Experience with SQLServer, Experience with Optimizely, Knowledge of software architecture and design patterns, Experience with CI/CD pipelines, Experience with TDD, Knowledge of web application security and performance principles, Experience with Kafka, Experience with Git and Gitflow 📃 Skills: DotNet, ASPNETCore, C#, SQLServer, Optimizely, Kafka, Webpack, TailwindCSS, Storybook, Chromatic, Rider, VisualStudio, Git, GitHub, Gitflow, React, CICD, TDD 🏢 Description: We are looking for an experienced Senior Full-Stack Developer (with Optimizely) to join the team of our client. The project focuses on building a modern e-commerce and marketing platform based on composable, headless, cloud architecture, with the goal of delivering a seamless and fully personalized end-to-end customer experience. Who we are: We are Inspeerity (part of DevelopX group), a modern software house, providing software development, consultancy, and maintenance services. We specialize in full stack development – from defining project requirements, to designing, building, and deploying software applications for web, backend, enterprise and mobile. We are crazy about technology, serious about people. TL;DR • Who : Senior Full-Stack Developer (with Optimizely) • Contract Type : B2B • Salary range: Up to 210 PLN/h + VAT • Start date : ASAP • Project lenght : ~12 months, with the possibility of extension. • Company : Software House • Project topic : Building Materials Industry What you’ll be doing: Developing scalable technical solutions. Building and maintaining automated build and deployment pipelines. Developing features across the full technology stack, from data access and business logic to the user interface. Writing unit tests, fixing bugs, and preparing documentation. Troubleshooting and resolving production issues. Collaborating closely with business stakeholders to translate requirements into effective technical solutions. You will be the best fit if you have: At least 4 years of practical experience working with Microsoft .NET / ASP. NET Core and SQL Server. Strong understanding of software architecture, design patterns, and engineering best practices. Hands-on experience in full-stack development using C# and web technologies. Solid knowledge of web application performance, quality standards, and security principles. Genuine interest in Generative AI and its application in optimizing and automating the software development lifecycle. Experience working in Agile environments, including CI/CD pipelines, TDD, and peer code reviews. In addition to the stack mentioned above, experience in working with Apache Kafka, Webpack, TailwindCSS, Storybook, Chromatic, Rider, Visual Studio, Git, Github, Gitflow. Experience with React is a plus. English level B2 or higher. What we offer Remote work model with occasional visits to our client's office in Poznań or Warsaw. B2B contract. You’ll join a collaborative team of 12 specialists. About process: Step 1 - Call with with someone from our People Team. Step 2 - Meeting with our .NET Team Lead as a technical interviewer. Step 3 - Final stage. A technical interview with the client-side representatives. Time for your turn! ;)

🏢 Summary: The offer is for a Senior .NET Developer responsible for improving and refactoring core backend systems to enhance structure, maintainability, and security. The role focuses on reducing technical debt, enabling automation and AI integration, and ensuring high code quality through testing and CI/CD practices. The position involves hands-on development within legacy or monolithic environments and driving system modernization. 🗂️ Requirements: 5+ years experience in .NET / C# backend development, Experience with legacy or monolithic systems, Strong knowledge of clean code principles, Proven experience in refactoring existing codebases, Strong SQL and backend integration experience, Experience with APIs and service-based architecture, Experience with CI/CD pipelines, Experience with automated testing, Familiarity with TDD or BDD practices, Experience with Gherkin, SpecFlow, Cucumber or similar, Experience using AI tools in development workflows, Understanding of code structuring for automation and AI integration 📃 Skills: .NET, C#, SQL, APIs, CI/CD, TDD, BDD, Gherkin, SpecFlow, Cucumber, AI, Git, Docker, .NETCore 🏢 Description: Introduction & Summary: We are seeking a Senior .NET Developer with 5-8+ years of experience in backend development and .NET engineering. The successful candidate will drive improvement in code quality, reduce technical debt, and support system structuring for better predictability. With a focus on future automation and AI capabilities, you will help ensure code understandability, maintainability, and security. Main Responsibilities: Responsible for hands-on development and refactoring of core systems, with the aim of enhancing their structure and predictability. Develop and improve .NET-based systems. Reduce technical debt and increase maintainability. Support safe and efficient delivery. Ensure code is understandable, maintainable, and secure. Make systems testable and observable. Facilitate automation of workflows. Key Requirements: Strong experience with .NET / C#. Experience working with legacy or monolithic systems. Strong understanding of clean code principles. Experience with refactoring and improving existing codebases. Strong SQL and backend integration experience. Experience with APIs and service-based architecture. Experience with CI/CD pipelines. Experience with automated testing. Familiarity with TDD / BDD and security by design thinking. Experience with Gherkin / SpecFlow / Cucumber or similar. AI-related: Experience using AI tools in development workflows. Understanding of code structuring for automation and AI integration. Experience using AI for debugging, testing, or documentation support. Nice to Have: Experience with .NET Core. Experience with containerization. Exposure to AI-assisted testing or development tools. Experience improving system observability.

🏢 Summary: Senior .NET Developer role focused on building and evolving a real-time digital platform with complex business logic and multithreaded code. The position involves migrating a monolithic system to microservices and developing containerized services deployed on Kubernetes. You will design scalable backend solutions, create REST integrations, and influence architectural decisions across the full product lifecycle. 🗂️ Requirements: Minimum 6 years of commercial experience as .NET Developer, Very good knowledge of current .NET versions, Experience with asynchronous and multithreaded programming, Practical experience with microservices architecture or SOA, Experience in designing and developing REST APIs, Knowledge of CI/CD and basic DevOps practices, Basic knowledge of React and readiness to handle occasional frontend tasks, Understanding of application security principles, English at minimum B1/B2 level 📃 Skills: .NET, C#, REST, Microservices, SOA, Kubernetes, Docker, RabbitMQ, CI/CD, React, Multithreading, Asynchronous, DevOps, API 🏢 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. Lokalizacja: Gdańsk, praca hybrydowa (3-4x w tygodniu praca zdalna) 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, chyba że lubisz pracę w biurze, wtedy zapraszamy serdecznie do nas częściej :) Dużą niezależność, 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 będziesz pracować bezpośrednio z CTO firmy, Dobrą atmosferę oraz nastawienie na rozwiązywanie problemów, dzięki czemu większość ludzi jest z nami od lat.

🏢 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: Remote B2B opportunity for a Senior .NET Developer to build and maintain scalable enterprise web applications and SaaS platforms using modern Microsoft and cloud technologies. The role involves REST API development, automated testing, Agile collaboration, and participation in architectural and technical planning activities. 🗂️ Requirements: 6+ years of software development experience, Experience building and maintaining large web applications, Experience with SaaS solutions, Strong knowledge of C#, Strong knowledge of .NET Core, Strong knowledge of .NET Framework, Knowledge of REST architecture, Experience creating WebAPI services, Experience with NUnit, Experience with Moq, Experience with Jest, Practical knowledge of Git 📃 Skills: C#, .NET, .NETCore, .NETFramework, REST, WebAPI, NUnit, Moq, Jest, Git, Azure, AzureDevOps, SaaS, CI/CD, DevOps, SAFe, Agile 🏢 Description: Senior .NET Developer 📍 Lokalizacja: Zdalnie 📅 Forma współpracy: B2B - 900-1100 PLN/MD O projekcie Poszukujemy doświadczonych Senior .NET Developerów, którzy dołączą do zespołu rozwijającego skalowalne, bezpieczne i wydajne aplikacje webowe oraz rozwiązania SaaS. To doskonała okazja dla osób, które chcą pracować przy projektach klasy enterprise, wykorzystując nowoczesne technologie Microsoft i rozwiązania chmurowe. Zakres obowiązków Projektowanie, rozwój i utrzymanie dużych aplikacji webowych oraz platform SaaS. Współpraca z zespołami wielofunkcyjnymi w środowisku Agile. Tworzenie i rozwój REST API oraz usług webowych. Pisanie i utrzymywanie testów jednostkowych z wykorzystaniem NUnit, Moq oraz Jest. Udział w code review, dyskusjach architektonicznych oraz planowaniu technicznym. Praca z systemem kontroli wersji Git oraz Azure DevOps. Wymagania Minimum 6 lat doświadczenia w tworzeniu oprogramowania. Doświadczenie w budowie i utrzymaniu dużych aplikacji webowych oraz rozwiązań SaaS. Bardzo dobra znajomość: C# .NET Core .NET Framework Dobra znajomość architektury REST oraz tworzenia WebAPI. Doświadczenie z frameworkami testowymi: NUnit, Moq, Jest. Praktyczna znajomość Git. Mile widziane Doświadczenie w pracy w środowisku SAFe Agile. Znajomość procesów CI/CD oraz praktyk DevOps. Umiejętność rozwiązywania złożonych problemów technicznych. Dobre umiejętności komunikacyjne. Doświadczenie w mentoringu młodszych programistów i wspieraniu rozwoju zespołu.

🏢 Summary: Senior .NET Engineer role focused on building enterprise-grade .NET applications and integrating advanced AI/ML solutions using Azure cloud technologies. The position involves architecting scalable microservices, deploying AI workloads, optimizing AI models, and driving AI-powered automation and analytics initiatives. The offer includes remote work flexibility, professional development programs, certifications, and comprehensive benefits. 🗂️ Requirements: Bachelor's or Master's degree in Computer Science, Software Engineering, Data Science, or related field, 5+ years of professional software development experience in .NET/C# ecosystem, Hands-on experience integrating AI technologies in commercial projects, Strong knowledge of AI/ML concepts, model training, and data preprocessing, Experience with prompt engineering, RAG architectures, and vector databases, Ability to evaluate, fine-tune, and implement AI models and frameworks, Experience applying AI for automation, analytics, or product enhancement, Experience with Microsoft Azure AI services and cloud deployments, Knowledge of SOLID principles, design patterns, microservices, CI/CD, SQL and NoSQL databases, Strong analytical, debugging, and communication skills, Experience working in agile environments and mentoring engineers 📃 Skills: C#, .NET, .NET8, ASP.NET, Microservices, AI, ML, LLM, NLP, RAG, Azure, AzureOpenAI, AzureML, AzureFunctions, CosmosDB, AKS, SQL, NoSQL, CI/CD, PromptEngineering, VectorDB 🏢 Description: We are seeking a highly skilled and forward-thinking Senior .NET Engineer with AI expertise to join our growing engineering team. In this role, you will bridge the gap between traditional enterprise .NET development and cutting-edge Artificial Intelligence. You will be responsible for designing, building, and deploying robust .NET applications while leading the integration, evaluation, and scaling of AI/ML models. Quick Facts - Flexible schedule and opportunity to work remotely within Poland - Chance to work abroad for up to 60 days annually - Business-driven relocation opportunities - Stable income (Employment Contract or B2B) - Participation in the Employee Stock Purchase Plan Responsibilities - Architect, develop, and maintain high-performance, scalable, and secure enterprise-grade applications using modern .NET stack (C#, .NET 8, ASP.NET Core, Microservices) - Lead the hands-on integration and leveraging of AI technologies in real-world, production-ready projects - Evaluate, select, and implement optimal AI models, frameworks, and orchestrators beyond basic API/tool usage to solve complex business problems - Apply a strong understanding of AI/ML concepts to drive high-quality model training, dataset preprocessing, and advanced prompt engineering techniques to maximize output accuracy and relevance - Proactively identify high-value opportunities within current workflows and products to apply AI for process automation, advanced analytics, or next-generation product enhancements - Design and manage cloud infrastructure utilizing Microsoft Azure Technologies (e.g., Azure OpenAI Service, Azure Cognitive Services, Azure Machine Learning, Azure Functions, Cosmos DB, and AKS) to deploy and scale AI workloads - Explain complex AI concepts, workflows, architectural designs, and trade-offs clearly to both technical developers and non-technical business stakeholders - Establish and adhere to guidelines regarding security, rate limits, latency optimization, data privacy, and ethical considerations during model deployment Requirements - Bachelor's or Master's degree in Computer Science, Software Engineering, Data Science, or a related field - 5+ years of professional software development experience with .NET/C# - Hands-on experience integrating AI technologies such as LLMs, NLP, Computer Vision, or recommendation engines in commercial projects - Strong understanding of AI/ML concepts including model training, data preprocessing, and optimization - Expertise in advanced prompt engineering, RAG architectures, and vector databases - Ability to analyze, fine-tune, select, and implement AI models and frameworks - Proven experience applying AI for process automation, analytics, or product enhancement - Experience deploying AI workloads with Microsoft Azure technologies including Azure OpenAI and Azure ML pipelines - Solid understanding of SOLID principles, design patterns, microservices architecture, CI/CD pipelines, and database management - Strong analytical, debugging, and communication skills - Comfortable working in agile environments, mentoring junior engineers, and collaborating with Product Owners Benefits - Engineering community of industry professionals - Friendly team and enjoyable working environment - Outstanding career roadmap - Leadership development, career advising, soft skills, and well-being programs - Certification support for GCP, Azure, and AWS - Unlimited access to LinkedIn Learning, Get Abstract, and Cloud Guru - English classes - Benefits package including health insurance, multisport, and shopping vouchers - Strategically located offices with entertainment and relaxation zones - Referral bonuses - Corporate, social, and well-being events Please note: The set of bonuses might vary based on the role applied for.