Full-Stack Architect (.NET + React)

🏢 Summary: Full-time Senior Full Stack Developer role focused on building React and TypeScript interfaces, BFF services, and integrations with APIs, LLMs, and streaming endpoints. The position covers scalable frontend architecture, performance and resilience, and delivery of product features from prototype to production, with office work expected 2–3 days per week. 🗂️ Requirements: Strong hands-on TypeScript experience, Several years of software engineering experience, Strong React and modern frontend tooling experience, Frontend unit and integration testing experience, API design and development with NestJS and Node.js, Understanding of server-side rendering, Server Components, CDN strategies, and caching, Software architecture, clean code, and system design knowledge, Ability to work effectively amid uncertainty, Docker, Git, CI/CD, and Azure experience 📃 Skills: TypeScript, React, NestJS, Node.js, Docker, Git, CI/CD, Azure, Testing, SSR, CDN, Caching 🏢 Description: Role overview Svitla Systems Inc. is looking for a Senior Full Stack Developer for a full-time position (40 hours per week) in Kraków, Poland. Our client is a British wholesale distributor. You will be responsible for building user interfaces with TypeScript and React, developing and maintaining BFF services, integrating APIs and LLM services, designing scalable frontend architecture, optimizing application performance and user experience, implementing error handling and resilience patterns, and collaborating with product and engineering teams to deliver features from prototype to production. Office work is expected 2-3 days per week. Responsibilities Building user interfaces using TypeScript and React. Building and maintaining Backend for Frontend (BFF) services to orchestrate API calls and shape data for user interface needs. Integrating APIs, LLM services, and streaming endpoints to deliver product features. Designing and implementing scalable and maintainable frontend architecture. Ensuring performance, responsiveness, and optimal user experience across the application. Implementing error handling, loading states, and resilience patterns for distributed systems. Collaborating with product and engineering teams to bring concepts from prototype to production. Requirements Strong hands-on experience with TypeScript development. Several years of experience in software engineering, ideally with a strong focus on React and modern frontend development tools. Experience with frontend testing, including unit and integration testing. API design and development experience using NestJS and Node.js. Understanding of server-side rendering, Server Components, CDN strategies, and caching. Solid understanding of software architecture, clean code, and system design. Ability to work effectively in environments with a high degree of uncertainty and take a pragmatic, solution-oriented approach to problem-solving. Experience with Docker, Git, CI/CD, and Azure. Nice to Have Knowledge of GraphQL APIs. Experience with state management libraries (e.g. Zustand, React Query). Familiarity with Python, particularly in the context of working with backend services or AI-powered systems. Experience building data-intensive or real-time user interfaces. Familiarity with designing user experiences for AI-powered features or non-deterministic outputs. We offer US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in the workspace, either remote or in our welcoming office. Comprehensive medical insurance after one month. MultiSport card with access to 2500 sports facilities all over Poland Bonuses for recommendations of new employees. Bonuses for article writing, public talks, and other activities. 15 vacation days, 10 national holidays, 10 sick leaves, and family days off. Personalized learning program tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Welcome and anniversary presents, gifts for children, and more. Regular corporate events and meetups. Awesome team, friendly and supportive community!

🏢 Summary: Remote 12-month contract for a Full Stack Developer to build scalable .NET/React applications and deliver production AI-powered features. The role requires practical commercial AI implementation experience, including LLM integrations, RAG, agents, vector search, or intelligent automation. 🗂️ Requirements: 5+ years of commercial C#/.NET experience, Hands-on React and TypeScript experience, Experience building REST APIs, backend services, or microservices, Experience with Azure or another major cloud platform, Git and CI/CD experience, Practical production AI development experience, Experience integrating AI functionality into a commercial application or product, Polish and English communication skills 📃 Skills: C#, .NET, React, TypeScript, REST, Azure, Git, CI/CD, LLMs, RAG, AzureOpenAI, OpenAI, Embeddings, Microservices 🏢 Description: We are looking for an experienced Full Stack Developer (.NET / React) who has real, hands-on experience building AI-powered solutions or features . We are specifically looking for developers who have gone beyond simply using GitHub Copilot or other AI coding assistants . You should have actually designed, developed, integrated, or deployed AI functionality within a commercial application or product . Location: Remote – Poland Language: Polish and English Start: September 2026 Contract: 12 months Interview process: 1 interview only Key Responsibilities Design and develop full-stack applications using C# / .NET and React . Build scalable backend services, REST APIs and integrations. Design and implement AI-powered features as part of real applications or products. Integrate applications with LLMs and AI services such as Azure OpenAI, OpenAI or similar platforms. Work with technologies and concepts such as RAG, AI Agents, prompt orchestration, vector search, embeddings or intelligent automation , depending on the use case. Take AI solutions from idea/prototype through integration and production implementation . Work closely with architects, product owners and engineering teams. Required Skills 5+ years of commercial C# / .NET experience. Strong hands-on experience with React and TypeScript . Experience developing REST APIs, backend services and/or microservices . Azure or another major cloud platform. Git, CI/CD and modern software engineering practices. Strong Polish and English communication skills. AI Experience – Important We need someone with practical AI development experience , not only exposure to AI tools. You should have built or contributed to at least one solution involving areas such as: LLM integration within a commercial application. RAG (Retrieval-Augmented Generation) solutions. AI Agents / agentic workflows . Integration with Azure OpenAI, OpenAI APIs or similar AI platforms . Vector databases, embeddings or semantic search . AI-powered document processing, classification, extraction or summarisation. Intelligent workflow/process automation using AI. Custom AI assistants or conversational applications. Other production AI/ML functionality integrated into software products . We are interested in developers who can clearly explain what AI solution they built, what problem it solved, which technologies they used, and what their personal contribution was.

🏢 Summary: Full-time Senior Fullstack Software Engineer role focused on building scalable, cloud-native enterprise platform services with .NET and Angular or React. The position covers end-to-end feature delivery, microservices, architecture, CI/CD, production support, and mentoring in a hybrid Gdańsk-based setup. 🗂️ Requirements: 5+ years of commercial software development experience, Strong C# and .NET Core experience, ASP.NET, REST API, and microservices experience, Hands-on Angular or React experience, AWS, Docker, Kubernetes, SQL, Entity Framework, Git, and Azure DevOps knowledge, Automated testing and CI/CD pipeline experience, Modern software architecture and cloud-native development knowledge, English proficiency at B2+ level 📃 Skills: C#, .NET, ASP.NET, REST, Microservices, Angular, React, AWS, Docker, Kubernetes, SQL, EntityFramework, Git, AzureDevOps, CI/CD 🏢 Description: Senior Fullstack Software Engineer (.NET + Angular/React) Join a team building scalable, cloud-native platform services that power enterprise applications used by customers worldwide. We are looking for an experienced Fullstack Engineer with strong .NET expertise and solid frontend experience in Angular or React. Location: Gdańsk (Hybrid) Employment: Full-time, Employment Contract (UoP) Responsibilities Design and develop modern web applications using .NET and Angular or React . Build and enhance cloud-native, microservices-based solutions. Own features end-to-end, from technical design through development, testing, deployment, and support. Collaborate with cross-functional teams to deliver secure, scalable, and high-quality software. Contribute to architecture, CI/CD, automated testing, and engineering best practices. Support production environments and mentor other engineers. Requirements 5+ years of commercial software development experience. Strong experience with C#, .NET Core, ASP.NET, REST APIs , and microservices. Hands-on experience with Angular or React . Knowledge of AWS, Docker, Kubernetes, SQL, Entity Framework , Git, and Azure DevOps. Experience with automated testing and CI/CD pipelines. Good understanding of modern software architecture and cloud-native development. English level B2+ . What We Offer Employment contract (UoP). Hybrid work model from our Gdańsk office. Opportunity to work on a modern cloud platform using the latest technologies. International environment with experienced engineers and opportunities for professional growth.

🏢 Summary: Senior .NET Full Stack Developer role focused on building and supporting enterprise web applications, RESTful APIs, and frontend and backend solutions. The position combines hands-on development with technical decision-making, testing, CI/CD, releases, production support, and hybrid work from Lisbon. 🗂️ Requirements: Degree in Computer Science, Software Engineering, Information Technology, Engineering, or related technical field, 5–8 years of relevant .NET full-stack development experience, Strong .NET Core, .NET Framework, and MVC expertise, Experience with React, Angular, JavaScript, and legacy technologies, Strong SQL and Entity Framework knowledge, Production application support experience, CI/CD, Azure DevOps, Jenkins, and Git experience, Authentication and core security principles knowledge, Unit and integration testing experience, Professional English proficiency, minimum B2 📃 Skills: .NET, MVC, React, Angular, JavaScript, C#, SQL, EntityFramework, REST, AzureDevOps, Jenkins, Git, CI/CD, Authentication 🏢 Description: We are seeking a highly skilled Senior .Net Full Stack Developer with expertise in .NET Framework and extensive experience in developing full-stack web applications. The role requires a proactive individual who is capable of making critical technical decisions and contributing effectively within a collaborative team environment. Key Responsibilities Design, develop, maintain, and enhance full-stack web applications. Build and integrate RESTful APIs across enterprise platforms. Gather, analyze, and refine business and technical requirements. Contribute to technical decisions and help prioritize development activities. Develop frontend solutions using React, Angular, JavaScript , and legacy technologies. Develop backend solutions using .NET Core, .NET Framework, and C#. Work with SQL Server and related data access technologies. Perform unit testing and integration testing to ensure quality and reliability. Participate in release and deployment management activities. Support and improve CI/CD pipelines and DevOps practices . Troubleshoot and resolve production incidents , including high-priority issues. Manage and contribute to risk, issue, incident, and problem resolution . Ensure adherence to coding standards, development guidelines, naming conventions, templates, and reference implementations. Produce and maintain clear technical documentation. Collaborate effectively within the team and across distributed, cross-functional, and international teams. Required Qualifications Degree in Computer Science, Software Engineering, Information Technology, Engineering , or a related technical field. 5 to 8 years of relevant professional experience as a .Net Full Stack Developer . Strong expertise in .NET Core/Framework/MVC and related frameworks. Solid experience with React, Angular, JavaScript and working with older or legacy technologies when required. Strong knowledge of SQL and ORM tools such as Entity Framework . Experience working in production environments and supporting live business applications. Hands-on experience with CI/CD, Azure DevOps, Jenkins, and Git . Understanding of authentication mechanisms and core security principles . Experience in development, unit testing , and integration testing . Nice to Have Strong team player who collaborates effectively within and across teams. Proactive mindset with strong ownership and accountability. Good knowledge of Agile ways of working . Experience in documentation and standards ownership . Structured approach to release management, incident management, and problem-solving . Ability to work effectively in a dynamic, fast-paced environment. Experience with requirement gathering, analysis , and solution design . Strong skills in decision-making, prioritization , and communication . Language Requirements Professional proficiency in English speaking and writing (at least B2 level). Dutch and/or French is a strong plus. Work model: 2 days per week in the Lisbon office and 3 days at home.

🏢 Summary: Full-time Senior Backend Developer role building a modern, large-scale enterprise platform for a global manufacturing customer. The position focuses on Node.js/TypeScript backend services, REST APIs, enterprise integrations, database design, and secure, scalable application delivery, with planned work through December 2026 and a possible extension to February 2027. 🗂️ Requirements: 7+ years of software development experience, 5+ years of Node.js backend development experience, TypeScript and JavaScript proficiency, RESTful API design and development knowledge, Enterprise-scale web application development experience, Software architecture and design patterns knowledge, Relational database experience, Secure coding and application security knowledge, Agile development experience, Advanced English, Availability for business trips to Basel, Switzerland 📃 Skills: Node.js, TypeScript, JavaScript, REST, PostgreSQL, SQL, Agile 🏢 Description: Svitla Systems Inc. is looking for a Senior Backend Developer (Node.js) for a full-time position (40 hours per week) in Europe . Our client is a leading multinational company in the building materials industry. You'll join the implementation of a large-scale enterprise web application for a global manufacturing customer. The project focuses on developing and implementing a modern enterprise platform that will replace an existing business application used across multiple countries. The backend solution will be built using modern technologies and integrated with various enterprise systems to support business-critical processes. The project's planned end date is December 18, 2026, with a possible extension to February 01, 2027. Requirements 7+ years of experience in software development. 5+ years of experience developing backend applications using Node.js. Strong knowledge of TypeScript and JavaScript. Understanding of designing and developing RESTful APIs. Experience with enterprise-scale web application development. In-depth understanding of software architecture principles and design patterns. Knowledge of relational databases (PostgreSQL, SQL Server, or similar). Understanding of secure coding practices and application security principles. Experience working in Agile software development environments. Strong analytical and problem-solving skills. Advanced English. Availability for business trips to Basel, Switzerland, during key project phases (Kick-off, end of Concept Phase, and Go-Live readiness review). Responsibilities Develop scalable backend services using Node.js and TypeScript. Implement RESTful APIs and backend business logic for enterprise web applications. Collaborate with architects to define technical solutions and application architecture. Participate in technical design sessions and solution discussions. Integrate backend services with internal and third-party enterprise systems. Design and optimize database structures, queries, and data models. Ensure application performance, scalability, reliability, and security. Write clean, maintainable, and well-tested code following engineering best practices. Participate in code reviews. Collaborate closely with Front End Developers, QA Engineers, Business Analysts, and DevOps Engineers. Participate in Agile ceremonies including sprint planning, daily stand-ups, reviews, and retrospectives. We offer US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Regular performance appraisals to support your growth. Flexibility in workspace, either remote or our welcoming office. Bonuses for article writing, public talks, and other activities. Generous time off, including vacation, national holidays, sick leaves, and family days. Personalized learning programs tailored to your interests and skill development. Free tech webinars and meetups organized by Svitla. Regular corporate online activities. Awesome team and a friendly, supportive community!