Senior Full-Stack .NET Engineer (with Node.js & Go)

🏢 Summary: The offer is for a Senior Full Stack .NET Developer responsible for designing, developing, and delivering end-to-end software solutions within a modern .NET and Azure environment. The role includes architectural input, code quality assurance, CI/CD automation, and replatforming of existing systems. You will work across backend and frontend, collaborating in Agile teams to build API-driven applications. 🗂️ Requirements: 5+ years experience with C# and .NET in complex environments, Experience building API-based applications for web, desktop or mobile clients, Practical experience with Blazor, ASP.NET MVC, Razor, Hands-on experience with Microsoft Azure (Functions, App Services, Azure SQL, DevOps, CI/CD), Strong SQL skills including data modeling and query optimization, Experience with code reviews, debugging and performance profiling, Proficiency with Git and branching strategies, Knowledge of Clean Architecture and design patterns (CQRS, Mediator, Repository), Experience working in Agile teams 📃 Skills: C#, .NET, Blazor, ASP.NET, MVC, Razor, Azure, SQL, Git, CI/CD, CQRS, Mediator, Repository, AzureSQL, DevOps, Python, Node.js 🏢 Description: Your impact As a Senior Full Stack .NET Developer , you will be responsible for designing, developing, and delivering high‑quality software solutions. You will support teams in applying best practices, ensuring code quality, contributing to architectural discussions, and driving process automation. You will collaborate closely with Product Owners, Architects, and Scrum teams. Key Responsibilities Support the Software Engineering Manager and Solution Architect in defining the shared tech stack and development best practices Advise development teams on solution design, technical debt assessment, and continuous process improvement Ensure high code quality through code reviews, standards alignment, and CI/CD pipeline improvements Translate business requirements into technical solutions Support solution design activities: user stories, effort estimation, API design, and architectural decisions Contribute to replatforming and refactoring of existing systems Work end‑to‑end on new applications (backend + frontend) within the approved .NET stack Support sprint planning, estimation, and task breakdown for development teams Contribute to DevOps processes, automation of CI/CD, and organization of testing and UAT Provide technical guidance, resolve blockers, and mentor other developers Here's what you'll need 5+ years of experience designing and developing C# / .NET solutions in complex environments Experience building applications based on API architectures for multiple clients (web, desktop, mobile, plugins) Practical Experience with Blazor, ASP.NET MVC, Razor Proven experience with Microsoft Azure (Functions, App Services, Azure SQL, DevOps, CI/CD) Solid expertise in SQL , data modeling, optimization, and query tuning Experience with code quality assurance, advanced debugging, and performance profiling Strong knowledge of Git and modern branching strategies Familiarity with Clean Architecture principles , separation of layers, and design patterns (CQRS, Mediator, Repository) Experience working in Agile teams and strong communication skills Nice to have: Python for automation tools and integrations Node.js We offer: Rewarding employment: Full-time employment with a salary that matches your qualifications Hybrid work model: Enjoy the flexibility of working from home, with just several office days per month Comprehensive benefits: Including Lux Med medical care, psychological support, life insurance, My Benefit cafeteria system, Multisport card co-financing, and a car/bike park sharing system Co-financed holidays: Enjoy "Wczasy pod Gruszą" for a well-deserved break Global projects: Engage in exciting international projects Inclusive networks: Join our diverse employee networks like Women's Network, OneWorld, PRISM, Careers Network, Green Team, SpeakUp, Collectively, and more Continuous learning: Participate in our Graduate Development Program, Learners’ Community, and self-learning platforms Language courses: Enhance your skills with courses in English, German, and Polish We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are. Find out more about life at Jacobs. As a Disability Confident employer, we will interview all disabled applicants who meet the criteria for a vacancy. If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team recruitmentpoland@jacobs.com

🏢 Summary: Senior Full-Stack .NET Developer role focused on designing, developing, and maintaining high-quality web applications and APIs within an agile environment. The position involves end-to-end development of custom .NET solutions, REST APIs on Mulesoft, and ensuring compliance with development and security standards. The role also contributes to architectural decisions and code quality across front-end and back-end components. 🗂️ Requirements: 10+ years experience in web application analysis and design, Strong experience with C# and .NET Core, Strong front-end development with HTML5, CSS, Bootstrap, JavaScript, JQuery, Cross-browser support and responsive design experience, Strong back-end development with C# and LINQ, Experience with SQL Server, Experience with MVC methodology, Understanding of OWASP security principles, Experience developing REST APIs, Experience consuming third-party web services, Experience with Entity Framework, Experience designing and implementing APIs on Mulesoft platform 📃 Skills: C#, .NET, .NETCore, HTML5, CSS, Bootstrap, JavaScript, JQuery, LINQ, SQLServer, MVC, OWASP, REST, EntityFramework, Mulesoft, APIs, CrossBrowser, ResponsiveDesign 🏢 Description: We're looking for a Senior Full-Stack .NET Developer who will play a key role in designing, developing, and maintaining high-quality software solutions. You will work closely with an agile team, contributing to architecture decisions, ensuring code quality, and driving continuous improvement. Key Responsibilities: Designs, develops, tests, debugs and implements the new and/or enhancements of custom .Net solutions based on functional and design analysis documents, and in line with the Delhaize IT development, operations and security standards and guidelines Designs, develops, tests, debugs and implements APIs in our  Mulesoft platform. Ensures all these activities are executed within the agreed  planning and budget, and continuously stays focused on delivering high-quality solutions. Following the Change management and Life cycle management policies and procedures. Coaching development team members and supporting / helping them in an appropriate way. Control strictly the development and deliverables to ensure high quality. Requirements: Senior Full Stack .Net Developer, with a minimum of ten (10+) years of experience in analysis and design of web application development with  C# and .Net (Core) and latest versions. Strong front-end development skills on HTML5, CSS, Bootstrap,  JavaScript, JQuery, cross-browser support and responsive design Strong back-end development skills in C#, LINQ, SQL Server Familiarity with database technology such as SQL Server Experience with MVC methodology and principles Understanding of OWASP security principles Experience in developing REST APIs and consuming 3rd party web  services Experience with Entity Framework Excellent communication, interpersonal, training and team leading skills  and the ability to work effectively within a development team. Capable of providing leadership, mentoring of junior developers and technical support. Ability to deliver high-quality results meeting established standards and expectations for the organization. Ability to conduct research and recommend changes in an existing,  changing or emerging environment. Experience with the following will be considered as a plus: • Source control tools, such as GitHub. • Prior experience with Microsoft Azure • Working with Jira in an Agile/Scrum development environment • Docker and Kubernetes. • JavaScript frameworks such as Vue.js or React. • Development of Cloud-based applications.

🏢 Summary: Senior Full Stack Engineer role focused on building scalable web applications, solving complex technical challenges, and contributing to architecture decisions in a modern product environment. The position involves full-stack development across frontend, backend, and cloud systems using modern technologies. The offer includes remote work, flexible hours, modern equipment, and growth opportunities in a collaborative team. 🗂️ Requirements: 5+ years of Full Stack Software Engineering experience, Strong algorithmic thinking, Knowledge of data structures, Understanding of software design principles, Performance optimization skills, Experience with TypeScript, Experience with React, Experience with Node.js, Experience with SQL databases, Experience across frontend, backend, and cloud environments, Ability to learn new technologies quickly, Fluent English, Strong communication skills 📃 Skills: TypeScript, React, Node.js, SQL, JavaScript, Cloud 🏢 Description: We are looking for a Senior Full Stack Engineer with strong software engineering fundamentals and excellent algorithmic and problem-solving skills. You'll play a key role in designing scalable applications, solving complex technical challenges and driving architectural decisions in a modern product environment. Responsibilities - Design, develop and maintain high-performance web applications. - Translate complex business requirements into efficient technical solutions. - Build scalable frontend and backend services using modern technologies. - Contribute to system architecture, code quality and technical improvements. - Collaborate with cross-functional teams and take ownership of features from design to deployment. Requirements - 5+ years of experience in Full Stack Software Engineering. - Strong algorithmic thinking and solid understanding of data structures, software design principles and performance optimization. - Experience with TypeScript, React, Node.js and SQL databases. - Ability to quickly learn new technologies and solve complex technical problems. - Experience working across frontend, backend and cloud environments. - Excellent communication skills and fluent English. What We Offer - Remote work model with flexible working hours. - Opportunity to work with modern technologies and influence technical decisions. - High-quality equipment provided. - Fast-paced environment with multiple innovative projects and excellent growth opportunities. - Collaborative team where ownership, initiative and continuous learning are highly valued.

🏢 Summary: Senior Full Stack Developer role focused on designing, building, and enhancing enterprise-level applications using .NET and React. The position involves contributing to architecture decisions, improving performance and usability, and ensuring application reliability across the full technology stack. It includes ownership of backend services, frontend development, CI/CD processes, and production support. 🗂️ Requirements: Minimum 5 years of professional experience in .NET application development, Strong proficiency in C# and Web API, Hands-on experience with React for web application development, Advanced knowledge of SQL Server and database architecture, Experience with CI/CD pipelines, Understanding of Software Development Life Cycle, Proficiency in HTML5 and CSS, Experience in system architecture and design patterns, Ability to troubleshoot production issues 📃 Skills: .NET, C#, WebAPI, React, SQL, SQLServer, CI/CD, HTML5, CSS, SDLC 🏢 Description: We Are Hiring: Senior Full Stack Developer (.NET and React) We are seeking an experienced Full Stack Developer who is ready to play a key role in designing, building, and improving enterprise-level applications. This position is ideal for someone who enjoys working across the entire technology stack, contributing to architectural decisions, enhancing user experiences, and ensuring application reliability and performance. This is a senior-level opportunity for a professional who combines deep technical expertise with strong analytical thinking and a proactive mindset. Key Responsibilities Contribute to system architecture planning and technical design discussions Drive user interface enhancements to improve usability, performance, and overall application resilience Apply industry-recognized design principles and architectural patterns when implementing solutions Review and interpret business and technical requirements, proposing improvements where appropriate Produce clear and detailed technical documentation for developed features and systems Build proof-of-concept solutions and prototypes to validate architectural approaches Oversee and manage system modifications within structured service management processes Support and enhance automation initiatives across development and operational workflows Deliver high-quality technical support, ensuring timely resolution of issues Collaborate closely with stakeholders to understand objectives and provide effective solutions Required Qualifications and Experience A minimum of Five years of professional experience developing and maintaining production-grade applications within the .NET ecosystem Strong proficiency in C# and Web API development, with experience building secure, scalable, and high-performing backend services Solid hands-on experience with React, developing dynamic, responsive, and performance-optimized web applications Advanced knowledge of database architecture and SQL Server, including complex query development, performance optimization, and tuning Practical experience with continuous integration and continuous delivery pipelines Comprehensive understanding of the Software Development Life Cycle, from requirements analysis through deployment and ongoing support Strong command of modern web standards including HTML5 and Cascading Style Sheets, with the ability to create intuitive user interfaces Excellent analytical and troubleshooting abilities, particularly in demanding production environments High attention to detail and commitment to delivering robust, maintainable solutions If you are passionate about developing high-quality software, improving system performance, and contributing to meaningful technical decisions, we would welcome the opportunity to connect with you. Please feel free to reach out directly or share this opportunity within your professional network. #Hiring #FullStackDeveloper #DotNet #React #SoftwareEngineering #TechnologyCareers

🏢 Summary: Senior Fullstack Engineer role focused on building modern, scalable web applications using React and Node.js, with strong emphasis on frontend development. The position covers the full application stack, including backend services, API design, and data management. You will collaborate with cross-functional teams to deliver high-quality, accessible, and high-performance digital products. 🗂️ Requirements: Strong commercial experience with React, Strong commercial experience with Node.js, Experience with React Router, Experience with TanStack Query, Experience integrating Headless CMS (preferably Contentful), Understanding of API design principles, Experience with PostgreSQL, Experience with Redis, Experience with Vitest, Experience with Playwright, Knowledge of WCAG accessibility standards, Experience with performance optimisation, Ability to work across full software development lifecycle 📃 Skills: React, Node.js, TypeScript, Fastify, PostgreSQL, Redis, React Router, TanStack Query, Contentful, Vitest, Playwright, WCAG, SAP Gigya, Salesforce 🏢 Description: Senior Fullstack Engineer (React & Node.js) About the Role We are looking for a Senior Fullstack Engineer to join a product team building modern, scalable web applications and digital experiences. You will work across the entire application stack, from user-facing interfaces to backend services and integrations. The role has a strong focus on frontend engineering while also involving backend development, API design, and data management. You will collaborate closely with product, design, and engineering teams to deliver high-quality, accessible, and performant applications. Responsibilities Develop and maintain modern web applications using React, Node.js, and TypeScript. Build scalable and reusable UI components integrated with a design system. Develop and maintain backend services and APIs using Node.js and Fastify. Integrate applications with CMS platforms and third-party services. Work with PostgreSQL and Redis to support application functionality and performance. Write and maintain automated tests, including unit and end-to-end tests. Ensure high standards of accessibility, performance, and code quality. Participate in architectural discussions and contribute to engineering best practices. Requirements Strong commercial experience in fullstack development using React and Node.js. Solid experience with modern frontend technologies, including React Router and TanStack Query. Experience integrating with Headless CMS platforms, preferably Contentful. Good understanding of API design and backend development principles. Experience with PostgreSQL and Redis. Experience with automated testing frameworks such as Vitest and Playwright. Strong understanding of accessibility standards (WCAG) and performance optimisation. Ability to work across the entire software development lifecycle in a product-oriented environment. Nice to Have Experience with authentication and identity platforms such as SAP Gigya. Experience integrating Salesforce products or loyalty platforms. Experience in highly scalable, customer-facing digital products. Experience working in agile, cross-functional product teams.

🏢 Summary: Senior Backend/Fullstack Developer role focused on maintaining and improving a large-scale enterprise application for municipal waste collection and environmental services. The position involves solving complex backend issues, optimizing performance, developing REST APIs, and modernizing legacy systems using C# and .NET technologies. The developer will work independently within an Agile environment and contribute to architecture, testing, and continuous improvement initiatives. 🗂️ Requirements: 8+ years of professional software development experience, Strong experience with C# and .NET, Experience with enterprise backend development, Experience debugging complex production systems, Experience with legacy and monolithic applications, Strong SQL skills, Experience with PostgreSQL or relational databases, Experience with Entity Framework or similar ORM, Experience designing and consuming REST APIs, Experience with Git, GitHub and CI/CD pipelines, Experience writing Unit Tests and Integration Tests, Understanding of Agile Scrum methodologies, Ability to work independently, English communication skills 📃 Skills: C#, .NET, ASP.NET, PostgreSQL, SQL, EntityFramework, REST, Git, GitHub, CI/CD, Scrum, UnitTesting, IntegrationTesting 🏢 Description: Summary: The role of Senior Backend/Fullstack Developer is crucial for the evolution, an enterprise application that aids municipalities in managing waste collection and environmental services. This role focuses on solving complex technical problems and improving existing software rather than just creating new applications. Responsibilities: Develop and maintain a large-scale enterprise application built with C# and .NET. Troubleshoot and resolve complex production issues across the platform. Analyse existing solutions and improve maintainability through refactoring. Improve application performance and optimise database queries. Develop backend services and REST APIs. Work with PostgreSQL using both raw SQL and Entity Framework. Contribute to architecture discussions and technical decision-making. Write clean, maintainable and well-tested code. Implement Unit Tests and Integration Tests. Participate actively in Scrum ceremonies, refinement sessions and technical discussions. Contribute to continuous improvement initiatives across the development lifecycle. Help identify opportunities to leverage AI-assisted software development tools to improve engineering efficiency. Key Requirements: 8+ years of professional software development experience. Strong experience with C# and .NET (both .NET Framework and modern .NET). Solid understanding of enterprise backend development. Extensive experience debugging complex production systems. Experience working with legacy and monolithic applications. Strong SQL skills, including writing, analysing and optimising raw SQL queries. Experience with PostgreSQL or other relational databases. Experience using Entity Framework or similar ORM technologies. Experience designing and consuming REST APIs. Experience with Git, GitHub and CI/CD pipelines. Experience writing Unit Tests and Integration Tests. Good understanding of Agile methodologies (Scrum). Ability to work independently and proactively. Excellent English communication skills. Nice to Have: Experience with waste management systems. Experience in public sector software. Knowledge of utilities or environmental platforms. Understanding of SOLID principles. Experience in software architecture. Skills in performance optimisation. Familiarity with security best practices. Knowledge of domain-driven design. Experience with GitHub Copilot and AI-assisted software development. Understanding of process optimisation. Experience in technical mentoring. Other Details: Technical Environment: Includes C#, .NET, ASP.NET, PostgreSQL, REST APIs, Git/GitHub, CI/CD. Initial Onboarding: In the first three months, the developer will learn the RenoWeb platform, work independently on bug fixes, and deliver small tasks, with expectations of becoming largely autonomous by the end of the onboarding period.

🏢 Summary: Senior Fullstack Engineer role focused on developing scalable enterprise applications using .NET and React in a hybrid Krakow-based environment. The position involves full lifecycle development, UI enhancements, DevOps automation, architecture contributions, and customer-focused solution delivery. 🗂️ Requirements: 7+ years of experience in .NET application development, Experience with React frontend development, Proficiency in C#, Experience with Web API development, Advanced SQL Server and T-SQL skills, Understanding of SDLC processes, Experience with DevOps practices, Fluent English, Legal right to work in the European Union 📃 Skills: .NET, React, C#, WebAPI, SQL, SQLServer, T-SQL, DevOps, CI/CD, Docker, Kubernetes 🏢 Description: Unleash innovation — shape the future of enterprise applications. Krakow-based opportunity with hybrid work model. As a Senior Fullstack Engineer – .NET and React Development , you will be working for our client, a leader in enterprise software solutions, dedicated to delivering robust, scalable, and innovative digital tools. Your expertise will drive the development of cutting-edge applications that empower businesses worldwide, supporting their digital transformation journeys. Your main responsibilities: Implement solutions following best Design Patterns to ensure maintainability and scalability Analyze requirements to fully understand solutions and recommend improvements for optimal performance Lead UI enhancements and improvements to boost user experience and application stability Actively participate in DevOps automation and improve the CI/CD lifecycle processes Manage changes through the entire service management lifecycle, ensuring seamless updates Contribute to software architecture design and technical decision-making Develop and prototype applications to validate concepts and designs Provide exceptional customer support by addressing and resolving issues promptly Communicate effectively with clients to understand needs and deliver tailored solutions You're ideal for this role if you have: A minimum of 7 years of professional experience in production application development within .NET ecosystems, including front-end (preferably React) and DevOps practices Proficiency in C# and Web API development, with a focus on scalable, secure backend services Strong hands-on experience with React, building dynamic, responsive web applications Advanced SQL skills, particularly with SQL Server, including T-SQL scripting, query optimization, and performance tuning Solid understanding of the SDLC, from requirement gathering to deployment and maintenance Exceptional problem-solving abilities and an eye for detail to ensure high-quality deliverables It is a strong plus if you have: (optional) Certifications in cloud or DevOps tools Experience with containerization (e.g., Docker, Kubernetes) Language Required for the role: Fluent English (written and spoken) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Fullstack Engineer role focused on .NET and React development for enterprise-grade applications, driving scalable backend services and modern UI solutions. The position involves leading architectural decisions, enhancing CI/CD processes, and improving application performance and user experience. Candidates will contribute across the full SDLC while supporting digital transformation initiatives. 🗂️ Requirements: Minimum 7 years of professional experience in .NET production development, Strong experience with C# and Web API, Hands-on experience with React, Advanced SQL skills with SQL Server and T-SQL, Experience with DevOps practices and CI/CD processes, Solid understanding of SDLC, Fluent English (written and spoken), Legal right to work in the European Union 📃 Skills: .NET, C#, WebAPI, React, SQL, SQLServer, T-SQL, DevOps, CI/CD, Docker, Kubernetes 🏢 Description: Unleash innovation — shape the future of enterprise applications. Krakow-based opportunity with hybrid work model. As a Senior Fullstack Engineer – .NET and React Development , you will be working for our client, a leader in enterprise software solutions, dedicated to delivering robust, scalable, and innovative digital tools. Your expertise will drive the development of cutting-edge applications that empower businesses worldwide, supporting their digital transformation journeys. Your main responsibilities: Implement solutions following best Design Patterns to ensure maintainability and scalability Analyze requirements to fully understand solutions and recommend improvements for optimal performance Lead UI enhancements and improvements to boost user experience and application stability Actively participate in DevOps automation and improve the CI/CD lifecycle processes Manage changes through the entire service management lifecycle, ensuring seamless updates Contribute to software architecture design and technical decision-making Develop and prototype applications to validate concepts and designs Provide exceptional customer support by addressing and resolving issues promptly Communicate effectively with clients to understand needs and deliver tailored solutions You're ideal for this role if you have: A minimum of 7 years of professional experience in production application development within .NET ecosystems, including front-end (preferably React) and DevOps practices Proficiency in C# and Web API development, with a focus on scalable, secure backend services Strong hands-on experience with React, building dynamic, responsive web applications Advanced SQL skills, particularly with SQL Server, including T-SQL scripting, query optimization, and performance tuning Solid understanding of the SDLC, from requirement gathering to deployment and maintenance Exceptional problem-solving abilities and an eye for detail to ensure high-quality deliverables It is a strong plus if you have: (optional) Certifications in cloud or DevOps tools Experience with containerization (e.g., Docker, Kubernetes) Language Required for the role: Fluent English (written and spoken) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Fullstack Engineer role focused on building and enhancing scalable enterprise applications using .NET and React within a hybrid Krakow-based setup. The position involves leading UI improvements, contributing to architecture and DevOps automation, and delivering high-quality, secure backend and frontend solutions. The engineer drives full SDLC activities, from design and development to deployment and support. 🗂️ Requirements: Minimum 7 years of professional experience in .NET production application development, Strong experience with React for frontend development, Proficiency in C# and Web API development, Advanced SQL Server skills including T-SQL and query optimization, Experience with DevOps practices and CI/CD processes, Solid understanding of SDLC, Fluent English, Legal right to work in the European Union 📃 Skills: .NET, C#, WebAPI, React, SQL, SQLServer, T-SQL, CI/CD, DevOps, Docker, Kubernetes 🏢 Description: Unleash innovation — shape the future of enterprise applications. Krakow-based opportunity with hybrid work model. As a Senior Fullstack Engineer – .NET and React Development , you will be working for our client, a leader in enterprise software solutions, dedicated to delivering robust, scalable, and innovative digital tools. Your expertise will drive the development of cutting-edge applications that empower businesses worldwide, supporting their digital transformation journeys. Your main responsibilities: Implement solutions following best Design Patterns to ensure maintainability and scalability Analyze requirements to fully understand solutions and recommend improvements for optimal performance Lead UI enhancements and improvements to boost user experience and application stability Actively participate in DevOps automation and improve the CI/CD lifecycle processes Manage changes through the entire service management lifecycle, ensuring seamless updates Contribute to software architecture design and technical decision-making Develop and prototype applications to validate concepts and designs Provide exceptional customer support by addressing and resolving issues promptly Communicate effectively with clients to understand needs and deliver tailored solutions You're ideal for this role if you have: A minimum of 7 years of professional experience in production application development within .NET ecosystems, including front-end (preferably React) and DevOps practices Proficiency in C# and Web API development, with a focus on scalable, secure backend services Strong hands-on experience with React, building dynamic, responsive web applications Advanced SQL skills, particularly with SQL Server, including T-SQL scripting, query optimization, and performance tuning Solid understanding of the SDLC, from requirement gathering to deployment and maintenance Exceptional problem-solving abilities and an eye for detail to ensure high-quality deliverables It is a strong plus if you have: (optional) Certifications in cloud or DevOps tools Experience with containerization (e.g., Docker, Kubernetes) Language Required for the role: Fluent English (written and spoken) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Fullstack Engineer role focused on building and enhancing scalable enterprise applications using .NET and React in a hybrid Krakow-based setup. The position involves leading UI improvements, contributing to architecture and DevOps automation, and delivering high-quality backend and frontend solutions. You will drive end-to-end development from design to deployment while ensuring performance, stability, and maintainability. 🗂️ Requirements: Minimum 7 years experience in .NET application development, Strong experience with React for frontend development, Proficiency in C# and Web API, Advanced SQL Server and T-SQL skills, Experience with CI/CD and DevOps practices, Understanding of SDLC, Experience with design patterns and software architecture, Fluent English, Legal right to work in EU 📃 Skills: .NET, C#, React, WebAPI, SQL, SQLServer, T-SQL, CI/CD, DevOps, SDLC, Docker, Kubernetes 🏢 Description: Unleash innovation — shape the future of enterprise applications. Krakow-based opportunity with hybrid work model. As a Senior Fullstack Engineer – .NET and React Development , you will be working for our client, a leader in enterprise software solutions, dedicated to delivering robust, scalable, and innovative digital tools. Your expertise will drive the development of cutting-edge applications that empower businesses worldwide, supporting their digital transformation journeys. Your main responsibilities: Implement solutions following best Design Patterns to ensure maintainability and scalability Analyze requirements to fully understand solutions and recommend improvements for optimal performance Lead UI enhancements and improvements to boost user experience and application stability Actively participate in DevOps automation and improve the CI/CD lifecycle processes Manage changes through the entire service management lifecycle, ensuring seamless updates Contribute to software architecture design and technical decision-making Develop and prototype applications to validate concepts and designs Provide exceptional customer support by addressing and resolving issues promptly Communicate effectively with clients to understand needs and deliver tailored solutions You're ideal for this role if you have: A minimum of 7 years of professional experience in production application development within .NET ecosystems, including front-end (preferably React) and DevOps practices Proficiency in C# and Web API development, with a focus on scalable, secure backend services Strong hands-on experience with React, building dynamic, responsive web applications Advanced SQL skills, particularly with SQL Server, including T-SQL scripting, query optimization, and performance tuning Solid understanding of the SDLC, from requirement gathering to deployment and maintenance Exceptional problem-solving abilities and an eye for detail to ensure high-quality deliverables It is a strong plus if you have: (optional) Certifications in cloud or DevOps tools Experience with containerization (e.g., Docker, Kubernetes) Language Required for the role: Fluent English (written and spoken) Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.