Senior Fullstack Developer (.NET, React, Claude)

🏢 Summary: Senior Backend Engineer role focused on building and scaling a cloud-based SaaS platform using modern .NET services and REST APIs. The position involves designing distributed systems, improving reliability and observability, and working with cloud and container environments. You will contribute to technical decisions and engineering best practices within a collaborative team. 🗂️ Requirements: 5+ years backend development experience, Experience with SaaS and web applications, Strong knowledge of C#, Strong knowledge of modern .NET/.NET Core, Solid computer science fundamentals, Experience with distributed systems design, Experience with cloud platforms, Experience with containers and orchestration, Understanding of concurrency and performance, Knowledge of authentication and authorization mechanisms 📃 Skills: C#, .NET, .NETCore, REST, Azure, AWS, GCP, Kubernetes, Kafka, RabbitMQ, SQS, Docker, SQL, HTML, CSS, JavaScript 🏢 Description: We’re hiring a Senior Backend Engineer to help build and scale a cloud-based SaaS platform. You’ll work on modern .NET services and APIs, improve reliability and observability, and contribute to technical decisions as part of a collaborative engineering team. Responsibilities: Build and maintain backend services and REST APIs in C# / .NET (.NET Core). Design scalable solutions for distributed systems (async workflows, messaging, integrations). Work with cloud services (Azure/AWS/GCP) and container environments (e.g. Kubernetes). Strengthen system reliability with logging, metrics, tracing, and monitoring. Support secure access patterns: authentication/authorization, API gateway concepts. Contribute through code reviews, good engineering practices, and automation. Requirements: 5+ years of backend development experience, including SaaS and web applications. Strong knowledge of C# and modern .NET + solid CS fundamentals. Familiarity with containers/orchestration and cloud-native approaches. Experience with some of: Kafka/RabbitMQ/SQS, workflow orchestration, job scheduling, search. Good understanding of concurrency and performance. Strong communication skills; Agile/Scrum is a plus. Bonus: basic front-end knowledge (HTML/CSS/JS).

🏢 Summary: Full-Stack Developer role focused on building and enhancing business applications using C#/.NET on the backend and React (18+) on the frontend. The position involves developing new features, maintaining and improving legacy code, and contributing to solution design within an Agile/Scrum team. Strong emphasis on backend expertise, frontend development, and architectural best practices. 🗂️ Requirements: 5+ years of experience with .NET and C#, 3+ years of experience with React (18+), Strong knowledge of .NET Framework, .NET Standard, .NET Core/.NET, Experience with debugging, profiling and performance analysis, Understanding of DDD, Clean Code and SOLID principles, Knowledge of architectural patterns and asynchronous communication, Good command of T-SQL, Experience with SQL Server Management Studio (SSMS), Experience with Visual Studio 📃 Skills: C#, .NET, React, TSQL, SQLServer, SSMS, VisualStudio, DDD, SOLID, CleanCode, Scrum, Debugging, Profiling, Architecture, Asynchronous 🏢 Description: We’re looking for an experienced Full-Stack Developer to build and evolve business applications using C#/.NET on the backend and React on the frontend. You’ll work closely with a cross-functional team (QA, Analysts, Product Owner) in an Agile/Scrum environment, contributing to both new development and improvements to existing (including legacy) codebases. Key responsibilities: Develop software in C# based on functional and technical documentation Build and maintain the frontend using React (18+) Analyse and improve existing code, including legacy components Contribute to solution design and architecture Collaborate daily with developers, testers, analysts and the Product Owner in Scrum Requirements: 5+ years of experience building applications with .NET / C# 3+ years of experience building applications with React Strong knowledge of C# (.NET Framework, .NET Standard, .NET Core/.NET) React experience with modern versions (React 18+) Practical skills in debugging, profiling and performance analysis Understanding of DDD, Clean Code, SOLID Knowledge of architectural patterns and asynchronous communication Good command of T-SQL and SQL Server Management Studio (SSMS) Experience working with Visual Studio Nice to have Experience building views/UI for mobile applications Background in projects for the financial sector Test automation experience (e.g., Postman, Playwright) Familiarity with WCAG accessibility standards

🏢 Summary: Full-stack freelance role focused on building scalable, cloud-native applications using .NET and Angular within the Azure ecosystem. The position involves translating complex business requirements into high-quality software solutions while applying modern architectural patterns and Agile delivery practices. The contract is project-based B2B for an initial 12-month period. 🗂️ Requirements: 4+ years experience with .NET technologies (C#, .NET Core, EF/ORM, WCF), 3+ years experience with Angular or strong React background with recent Angular experience, 2+ years hands-on experience with Azure services (Functions, Logic Apps, Web Apps), Advanced knowledge of architectural and design patterns, Experience with SOAP and REST web services, Experience with SQL and SQL Server, Experience with Git and CI/CD pipelines, Experience with Unit Testing, Fluent English 📃 Skills: .NET, .NETCore, C#, EntityFramework, ORM, WCF, Angular, React, Azure, Functions, LogicApps, WebApps, SQL, SQLServer, Git, CI/CD, SOAP, REST, Agile, UnitTesting 🏢 Description: Join an international team of experts delivering high-impact software solutions for global clients. In this role, you will work in a full-stack capacity, translating complex business requirements into scalable, cloud-native applications. You will collaborate with top-tier professionals to design and implement innovative solutions that address real-world engineering challenges while ensuring the highest industry standards. Form of cooperation: freelance project-specific B2B contract for an initial period of approximately 12 months. Tech stack: Backend: .NET / .NET Core, C#, Entity Framework (or other ORM), WCF, SOAP/REST APIs. Frontend: Angular (primary), React. Cloud: Azure (Functions, Logic Apps, Web Apps, SQL Server). Data: SQL Server. DevOps/Tools: Git, CI/CD, Agile, Unit Testing. Requirements: 4+ years of professional experience with .NET technologies (C#, .NET Core, EF/ORM, WCF) 3+ years of experience in Angular (or strong React background with recent Angular experience) 2+ years of hands-on experience with Azure services (e.g., Functions, Logic Apps, Web Apps) Advanced knowledge of Architectural and Design Patterns Proficiency in Web Services (SOAP/REST) and SQL Experience with Git, Continuous Integration, and Continuous Delivery pipelines Fluent English (written and spoken) for effective international communication Ideally, you’ll also have: Azure Cloud certifications Main responsibilities: Full-Stack Development: Address complex software engineering problems using both object-oriented and functional programming styles. Quality Assurance: Maintain high standards of code quality and testing through Clean Code and Unit Testing practices. Cloud Engineering: Design and develop scalable solutions utilizing a wide range of Azure-hosted services and tools. Agile Delivery: Implement Agile methodologies and modern software delivery techniques, including CI/CD and automated deployment. Professional Growth: Proactively adopt new technologies and frameworks within the Azure Cloud ecosystem to drive project success.

🏢 Summary: The role involves developing and maintaining scalable full-stack web applications using .NET and modern frontend frameworks. You will design robust Web APIs, optimize databases, and implement clean, testable code within CI/CD-driven environments. The position requires active participation in the full software development lifecycle for international projects. 🗂️ Requirements: Minimum 3 years commercial experience with .NET (C#, Web API, Entity Framework), Proficiency in Angular or React, Strong knowledge of JavaScript, HTML, CSS, Experience with SQL Server or PostgreSQL, Understanding of Unit Testing, Experience with Git, Experience with CI/CD pipelines, Knowledge of design patterns, Knowledge of software development best practices, Fluent English (min. B2), Availability for hybrid work mode 📃 Skills: .NET, C#, WebAPI, EntityFramework, Angular, React, JavaScript, HTML, CSS, SQL, SQLServer, PostgreSQL, UnitTesting, Git, CI/CD 🏢 Description: As a member of our development team, you will be responsible for building scalable web applications, designing robust APIs, and creating intuitive user interfaces. We value clean code, analytical thinking, and a proactive approach to technology. Our expectations: Minimum 3 years of commercial experience in .NET (C#, Web API, Entity Framework). Proficiency in Angular or React, along with JavaScript, HTML, CSS, and modern frontend libraries. Strong experience with relational databases such as SQL Server or PostgreSQL. Solid understanding of Unit Testing, Git, and CI/CD pipelines. Practical knowledge of design patterns and software development best practices. A collaborative mindset and the ability to explain complex technical issues clearly. Strong analytical skills and a "get it done" attitude. Fluent English (min. B2) for smooth collaboration with international partners. Open to work in hybrid mode. Main responsibilities: You will design, develop, and maintain scalable full-stack applications using .NET and modern frontend frameworks (Angular/React) for diverse client projects. You will be responsible for writing clean, testable code and implementing unit tests to ensure the highest software performance and reliability. You will work closely with cross-functional teams to architect robust Web APIs and optimize database schemas while following industry best practices and design patterns. You will actively participate in the full software development life cycle, including CI/CD processes and version control management, to ensure seamless project delivery.

🏢 Summary: Senior Fullstack Engineer role focused on delivering full-stack solutions within an AI-integrated SDLC where AI is embedded across planning, development, review, testing, and deployment. The position combines backend and frontend engineering with AI orchestration, automation, and cloud-native architecture in a remote-first setup. The engineer will also evolve shared AI toolchains and contribute to architectural and code quality standards. 🗂️ Requirements: Team-level AI-integrated SDLC experience across planning, development, review, testing, deployment, Shared AI toolchain management under version control, Hands-on use of Claude Code, GitHub Copilot, Cursor or equivalent as team tools, Building and maintaining custom AI skills and sub-agents for team use, Experience with parallel AI agent orchestration, Spec-driven development using OpenAPI, ADRs, PRDs as AI context, AI-assisted code review integrated into PR process, Working knowledge of AI orchestration frameworks, Backend development with .NET / C# and ASP.NET Core, Frontend development with TypeScript and React or Angular, Experience with SQL databases and ORM frameworks, Experience with Docker and Kubernetes, Experience with CI/CD pipelines, Experience with cloud platforms (Azure, AWS, or GCP) 📃 Skills: C#, .NET, ASP.NET, SQL, SQLServer, PostgreSQL, EFCore, OAuth, JWT, Python, Java, Node.js, TypeScript, JavaScript, React, Angular, LangChain, LlamaIndex, CrewAI, Docker, Kubernetes, GitHubActions, AzureDevOps, Azure, AWS, GCP, OpenAPI, CQRS, DDD, EventSourcing, Microservices 🏢 Description: We are looking for a Senior Fullstack Engineer who combines deep technical expertise with real, team-level experience working in an AI-integrated software development lifecycle. Individual use of AI coding assistants is not sufficient for this role. We are specifically looking for engineers who have worked in teams where AI was embedded into every phase of delivery — from planning and design through development, review, testing, and deployment. We follow a remote-first setup with no mandatory regular office visits for this position. From time to time, you may be invited to join in-person meetings in one of our offices (Warsaw, Lodz, Wroclaw, Gdansk, or Bialystok), for example for client visits or team reunions. AI-First Requirements Experience working in an AI-enabled engineering team is mandatory — not a personal workflow preference. You have been part of a team where AI was systematically embedded across all delivery phases: planning, development, review, testing, and deployment. You can speak from direct experience about how it worked, what failed, and what you would change. Specific mandatory requirements: Team-level AI-integrated SDLC experience — shared toolchain, shared configurations, shared assets under version control Hands-on with Claude Code, GitHub Copilot, Cursor, or equivalent as a team tool, not only personal usage Built and maintained custom skills and sub-agents used across a team, not just personally Experience with parallel agent orchestration for concurrent workstream execution Disciplined plan → review plan → execute approach with AI involved at every phase Maintained shared prompt libraries, skill repositories, or agent configurations in version control AI-assisted code review integrated into the PR process: CodeRabbit, Copilot review, or similar Experience with spec-driven or document-driven development where structured specifications (OpenAPI, ADRs, PRDs) serve as AI context inputs, not just human references Working knowledge of at least one AI orchestration framework: LangChain, LlamaIndex, Microsoft Agent Framework, CrewAI, or equivalent Automation-first mindset: proactively identify repetitive or inefficient parts of current work and automate them using AI and other available tools. Cost-aware AI usage: understanding how AI credits are consumed across different tools, models, and workflows, and ability to choose the most appropriate model or approach for each task. Technical Requirements Backend: .NET / C#, ASP.NET Core, SQL Server / PostgreSQL, EF Core, OAuth 2.0 / JWT. Python, Java, or Node.js is a strong plus. Frontend: TypeScript, JavaScript, React(preferable) and/or Angular, state management, async patterns, frontend testing. Architecture: Full spectrum from monolith to microservices — DDD, CQRS, Event Sourcing, event-driven design, message brokers. Infrastructure: Docker, Kubernetes, CI/CD (GitHub Actions / Azure DevOps), Azure / AWS / GCP, structured observability. Responsibilities Deliver full-stack features to a high standard of quality, performance, and reliability Contribute to architectural decisions and system design trade-offs Evolve and maintain the team's shared AI toolchain across all SDLC phases Conduct code reviews including AI-assisted tooling; uphold and enforce engineering best practices Proactively surface risks, bottlenecks, and security concerns Communicate and collaborate directly with clients in English Mentor engineers on both technical fundamentals and AI-augmented workflow practices Professional Qualities Ownership mindset · Strong written and verbal English · Comfortable in client-facing roles · Raises the AI workflow maturity of those around them

🏢 Summary: Hands-on Lead .NET Software Engineer role focused on full ownership of end-to-end application development, building scalable and high-performance solutions using .NET, ReactJS, Azure and AI tools. The position emphasizes modern cloud architectures, CI/CD practices and containerization, with strong responsibility for design, implementation and optimization. This is an individual contributor role for an experienced engineer passionate about technical excellence and AI-driven development. 🗂️ Requirements: 5+ years of full-stack development experience with .NET and ReactJS, Proficiency in Azure, Proficiency in MS SQL, Experience delivering complex applications end-to-end, Experience with AI tools (GitHub Copilot preferred), Knowledge of microservices, serverless and event-driven architectures, Experience with CI/CD pipelines, Experience with Docker and Kubernetes, Experience with infrastructure as code, English proficiency at B2 level or higher 📃 Skills: .NET, ReactJS, Azure, MSSQL, GitHub, Copilot, CI/CD, Docker, Kubernetes, Microservices, Serverless, Event-driven, AI, IaC 🏢 Description: We are seeking a highly skilled and motivated Lead .NET Software Engineer to take full ownership of end-to-end application development. This is a hands-on, individual contributor role for a technologist who thrives on building robust, scalable solutions and is passionate about leveraging AI and cloud technologies. You will be responsible for designing, developing and delivering complex applications, ensuring technical excellence at every stage. Responsibilities Take full technical ownership of the entire application development lifecycle, from requirements analysis and design to implementation and deployment Design and build scalable, high-performance applications Use AI (at least Copilots) Collaborate with product owners and other engineers to deliver high-quality solutions that meet business objectives Write clean, maintainable and well-documented code; perform code reviews Troubleshoot, debug and optimize applications Requirements 5+ years of hands-on full-stack development experience with .NET and ReactJS, with a proven track record of delivering complex applications end-to-end Proficiency in Azure and MS SQL Flexibility to use AI tools (GitHub Copilot is preferred) Understanding of modern software architecture patterns (microservices, serverless, event-driven, etc.) Background in CI/CD pipelines, containerization (Docker, Kubernetes) and infrastructure as code Excellent problem-solving skills, attention to detail and a relentless drive for technical excellence Self-motivated, hard-working and able to work independently with minimal supervision Strong communication skills, able to articulate technical concepts clearly to technical and non-technical stakeholders English proficiency at B2 level or higher We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Hands-on Lead .NET Software Engineer role focused on full ownership of end-to-end application development, building scalable solutions using .NET, ReactJS and Azure. The position emphasizes AI-driven development, cloud technologies and modern architecture patterns. This is an individual contributor role with strong technical responsibility across the full software lifecycle. 🗂️ Requirements: 5+ years full-stack development with .NET and ReactJS, Proficiency in Azure, Proficiency in MS SQL, Experience delivering complex applications end-to-end, Experience with AI tools (GitHub Copilot preferred), Knowledge of microservices, serverless and event-driven architectures, Experience with CI/CD pipelines, Experience with Docker and Kubernetes, Experience with infrastructure as code, English level B2 or higher 📃 Skills: .NET, ReactJS, Azure, MSSQL, GitHubCopilot, AI, Microservices, Serverless, EventDriven, CI/CD, Docker, Kubernetes, IaC 🏢 Description: We are seeking a highly skilled and motivated Lead .NET Software Engineer to take full ownership of end-to-end application development. This is a hands-on, individual contributor role for a technologist who thrives on building robust, scalable solutions and is passionate about leveraging AI and cloud technologies. You will be responsible for designing, developing and delivering complex applications, ensuring technical excellence at every stage. Responsibilities Take full technical ownership of the entire application development lifecycle, from requirements analysis and design to implementation and deployment Design and build scalable, high-performance applications Use AI (at least Copilots) Collaborate with product owners and other engineers to deliver high-quality solutions that meet business objectives Write clean, maintainable and well-documented code; perform code reviews Troubleshoot, debug and optimize applications Requirements 5+ years of hands-on full-stack development experience with .NET and ReactJS, with a proven track record of delivering complex applications end-to-end Proficiency in Azure and MS SQL Flexibility to use AI tools (GitHub Copilot is preferred) Understanding of modern software architecture patterns (microservices, serverless, event-driven, etc.) Background in CI/CD pipelines, containerization (Docker, Kubernetes) and infrastructure as code Excellent problem-solving skills, attention to detail and a relentless drive for technical excellence Self-motivated, hard-working and able to work independently with minimal supervision Strong communication skills, able to articulate technical concepts clearly to technical and non-technical stakeholders English proficiency at B2 level or higher We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Hands-on Lead .NET Software Engineer role focused on full ownership of end-to-end application development, building scalable and high-performance solutions using .NET, ReactJS and Azure. The position emphasizes AI-assisted development, modern architecture patterns and cloud-native practices. This is an individual contributor role requiring strong technical leadership and expertise across the full development lifecycle. 🗂️ Requirements: 5+ years full-stack development experience with .NET and ReactJS, Proficiency in Azure, Proficiency in MS SQL, Experience with AI tools (GitHub Copilot preferred), Knowledge of microservices architecture, Knowledge of serverless architecture, Knowledge of event-driven architecture, Experience with CI/CD pipelines, Experience with Docker, Experience with Kubernetes, Experience with infrastructure as code, English level B2 or higher 📃 Skills: .NET, ReactJS, Azure, MSSQL, GitHubCopilot, AI, CI/CD, Docker, Kubernetes, Microservices, Serverless, Event-driven, IaC 🏢 Description: We are seeking a highly skilled and motivated Lead .NET Software Engineer to take full ownership of end-to-end application development. This is a hands-on, individual contributor role for a technologist who thrives on building robust, scalable solutions and is passionate about leveraging AI and cloud technologies. You will be responsible for designing, developing and delivering complex applications, ensuring technical excellence at every stage. Responsibilities Take full technical ownership of the entire application development lifecycle, from requirements analysis and design to implementation and deployment Design and build scalable, high-performance applications Use AI (at least Copilots) Collaborate with product owners and other engineers to deliver high-quality solutions that meet business objectives Write clean, maintainable and well-documented code; perform code reviews Troubleshoot, debug and optimize applications Requirements 5+ years of hands-on full-stack development experience with .NET and ReactJS, with a proven track record of delivering complex applications end-to-end Proficiency in Azure and MS SQL Flexibility to use AI tools (GitHub Copilot is preferred) Understanding of modern software architecture patterns (microservices, serverless, event-driven, etc.) Background in CI/CD pipelines, containerization (Docker, Kubernetes) and infrastructure as code Excellent problem-solving skills, attention to detail and a relentless drive for technical excellence Self-motivated, hard-working and able to work independently with minimal supervision Strong communication skills, able to articulate technical concepts clearly to technical and non-technical stakeholders English proficiency at B2 level or higher We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Hands-on Lead .NET Software Engineer role focused on full ownership of end-to-end application development, building scalable solutions using .NET, ReactJS and Azure. The position emphasizes AI-driven development, modern cloud architecture and DevOps practices. This is an individual contributor role requiring strong technical leadership and independent delivery of complex applications. 🗂️ Requirements: 5+ years full-stack development with .NET and ReactJS, Proficiency in Azure, Proficiency in MS SQL, Experience delivering complex applications end-to-end, Experience with AI tools (GitHub Copilot preferred), Understanding of microservices, serverless and event-driven architectures, Experience with CI/CD pipelines, Experience with Docker and Kubernetes, Experience with infrastructure as code, English proficiency B2 or higher 📃 Skills: .NET, ReactJS, Azure, MSSQL, GitHubCopilot, AI, CI/CD, Docker, Kubernetes, Microservices, Serverless, EventDriven, IaC 🏢 Description: We are seeking a highly skilled and motivated Lead .NET Software Engineer to take full ownership of end-to-end application development. This is a hands-on, individual contributor role for a technologist who thrives on building robust, scalable solutions and is passionate about leveraging AI and cloud technologies. You will be responsible for designing, developing and delivering complex applications, ensuring technical excellence at every stage. Responsibilities Take full technical ownership of the entire application development lifecycle, from requirements analysis and design to implementation and deployment Design and build scalable, high-performance applications Use AI (at least Copilots) Collaborate with product owners and other engineers to deliver high-quality solutions that meet business objectives Write clean, maintainable and well-documented code; perform code reviews Troubleshoot, debug and optimize applications Requirements 5+ years of hands-on full-stack development experience with .NET and ReactJS, with a proven track record of delivering complex applications end-to-end Proficiency in Azure and MS SQL Flexibility to use AI tools (GitHub Copilot is preferred) Understanding of modern software architecture patterns (microservices, serverless, event-driven, etc.) Background in CI/CD pipelines, containerization (Docker, Kubernetes) and infrastructure as code Excellent problem-solving skills, attention to detail and a relentless drive for technical excellence Self-motivated, hard-working and able to work independently with minimal supervision Strong communication skills, able to articulate technical concepts clearly to technical and non-technical stakeholders English proficiency at B2 level or higher We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Hands-on Lead .NET Software Engineer role with full ownership of end-to-end application development, focused on building scalable, high-performance solutions using cloud and AI technologies. The position involves designing, developing and delivering complex applications while leveraging Azure, ReactJS and modern architectural patterns. It is an individual contributor role for a senior technologist passionate about technical excellence and innovation. 🗂️ Requirements: 5+ years full-stack development experience with .NET and ReactJS, Proven delivery of complex end-to-end applications, Proficiency in Azure, Proficiency in MS SQL, Experience with AI tools (GitHub Copilot preferred), Knowledge of microservices, serverless and event-driven architectures, Experience with CI/CD pipelines, Experience with Docker and Kubernetes, Experience with infrastructure as code, English proficiency B2 or higher 📃 Skills: .NET, ReactJS, Azure, MSSQL, Copilot, CI/CD, Docker, Kubernetes, Microservices, Serverless, Event-driven, IaC 🏢 Description: We are seeking a highly skilled and motivated Lead .NET Software Engineer to take full ownership of end-to-end application development. This is a hands-on, individual contributor role for a technologist who thrives on building robust, scalable solutions and is passionate about leveraging AI and cloud technologies. You will be responsible for designing, developing and delivering complex applications, ensuring technical excellence at every stage. Responsibilities Take full technical ownership of the entire application development lifecycle, from requirements analysis and design to implementation and deployment Design and build scalable, high-performance applications Use AI (at least Copilots) Collaborate with product owners and other engineers to deliver high-quality solutions that meet business objectives Write clean, maintainable and well-documented code; perform code reviews Troubleshoot, debug and optimize applications Requirements 5+ years of hands-on full-stack development experience with .NET and ReactJS, with a proven track record of delivering complex applications end-to-end Proficiency in Azure and MS SQL Flexibility to use AI tools (GitHub Copilot is preferred) Understanding of modern software architecture patterns (microservices, serverless, event-driven, etc.) Background in CI/CD pipelines, containerization (Docker, Kubernetes) and infrastructure as code Excellent problem-solving skills, attention to detail and a relentless drive for technical excellence Self-motivated, hard-working and able to work independently with minimal supervision Strong communication skills, able to articulate technical concepts clearly to technical and non-technical stakeholders English proficiency at B2 level or higher We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.